WO2008001789A1 - Cu-Ni-Sn COPPER BASE SINTERED ALLOY EXCELLENT IN WEAR RESISTANCE AND BEARING MEMBER MADE OF THE ALLOY - Google Patents

Abstract

Disclosed is a Cu-Ni-Sn copper base sintered alloy having a chemical composition composed of 10-40% of Ni, 5-25% of Sn, and optionally if necessary, 0.1-0.9% of P, 1-10% of C, 0.3-6% of calcium fluoride and 0.3-6% of molybdenum disulfide, and the balance of Cu and unavoidable impurities. A phase having a chemical composition of Cu(4-x-y)NixSny (with x being 1.7-2.3 and y being 0.2-1.3) is dispersed in the alloy matrix.

Description

 Specification

 Cu-Ni-Sn-based copper-based sintered alloy with excellent wear resistance and bearing material made of this alloy

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a bearing material made of a Cu—Ni—Sn based copper-based sintered bond alloy for bearings and an alloy thereof having excellent friction characteristics and wear resistance.

 This application ίMA, June 2006 27 曰 ί, 曰 本 [This patent application 2006-176255, which was filed] Claims priority and incorporates the contents thereof.

 Background art

 [0002] Conventionally, Cu_Ni_Sn-based copper-based sintered alloys have been used as bearing materials, and these Cu_Ni-Sn-based copper-based sintered alloys have excellent friction characteristics and wear resistance, especially in high-temperature environments. For example, a stainless steel reciprocating shaft bearing that operates a recirculation exhaust gas flow control valve of an EGR internal combustion engine that requires friction characteristics and wear resistance in a high temperature environment (see, for example, Patent Document 1) It is used for the inner rotor and counter mouth of an internal gear pump (see, for example, Patent Document 2).

 Furthermore, it is also known to add a solid lubricant such as molybdenum disulfide in order to lower the friction coefficient of the bearing material made of this Cu_Ni_Sn-based copper-based sintered alloy and further improve the lubricity. — The amount of molybdenum disulfide contained to improve the lubricity of the Ni—Sn based copper-based sintered alloy is usually:! ~ 5%.

 Patent Document 1: JP 2004-68074 A

 Patent Document 2: Japanese Patent Laid-Open No. 2005-314807

 Disclosure of the invention

 Problems to be solved by the invention

[0003] The Cu-Ni-Sn-based copper-based sintered alloy contains a relatively large amount of Ni, so it has excellent strength, corrosion resistance, friction characteristics, and wear resistance, and particularly excellent friction under high temperature environments. Although it has characteristics and wear resistance, further friction characteristics and wear resistance have been required. Means for solving the problem

 [0004] Therefore, the present inventors have conducted research to further improve the friction characteristics and wear resistance of the Cu-Ni-Sn based copper-based sintered alloy. As a result, Cu-Ni-Sn-based copper-based sintered alloy body is composed of Cu Ni Sn (x: l.7 ~ 2.3, y: 0.2 ~: 1.3)

 (Four

 The study results show that the formation of a structure in which the composition phase is dispersed further improves the friction properties and wear resistance.

[0005] The present invention has been made based on the results of such research,

 (1) Cu—Ni—Sn-based copper-based sintered alloy containing Ni, Sn and Cu

(Four

Cu—which has a structure in which the phase of the composition of Ni Sn (however, χ: 1 · 7–2 · 3, y: 0.2–: ί · 3) is dispersed is excellent in friction characteristics and wear resistance Ni—Sn-based copper-based sintered alloy. More preferably ί or, χ: 1 · 7~2 · 2 , y: 0.8~: a ί · 3.

[0006] The Cu-Ni-Sn based copper-based sintered alloy containing Ni, Sn and Cu described in (1) above contains Ni: 10 to 40%, Sn: 5 to 25% by mass, If necessary, Cu-Ni-Sn-based copper-based sintered alloy containing P: 0.1 ~ 0.9% and / or C: 1 ~: 10% and the balance: Cu and inevitable impurities Even if there is good ,. When P: 0.:! ~ 0.9% and / or C ::! ~ 10% is included, Cu P (Z: 0.7 ~: 1.3) is added to the base of the Cu_Ni_Sn copper-based sintered alloy. A component composition phase consisting of and

 (4-z) z Z or graphite phase is formed.

 Therefore, this invention has the following features.

(2) By mass%, Ni: 10-40. / o, Sn: 5-25. / ₀ is contained, the balance: Cu and inevitable impure power component composition, and Cu Ni Sn in the substrate (x: 1.7 to 2.3,

 (Four

 Cu: Ni-Sn based copper-based sintered alloy having a structure in which the phase of the component composition consisting of y: 0.2 to 1.3) is dispersed and having excellent frictional characteristics and wear resistance.

 (3) By mass%, Ni: 10 to 40%, Sn: 5 to 25%, P: 0.1 to 0.9%, balance: component composition consisting of Cu and inevitable impurities, and Cu Ni Sn in the substrate (However,

 (Four

 , X: l.7〜2 ・ 3, y: 0.2〜1 ・ 3) and Cu P (where z:

A Cu-Ni-Sn based copper-based sintered alloy having a structure in which the phase of the component composition consisting of 0.7 to 1.3 is dispersed and having excellent frictional characteristics and wear resistance. (4) By mass%, Ni: 10 to 40%, Sn: 5 to 25%, C: l to: 10%, balance: component composition consisting of Cu and inevitable impurities, and Cu Ni in the substrate Sn (where x:

 (Four

 Cu-Ni-Sn based copper-based sintered alloy with a frictional property and wear resistance having a composition of 1.7 to 2.3, y: 0.2 to 1.3) and a structure in which a graphite phase is dispersed .

 (5) By mass%, Ni: 10 to 40%, Sn: 5 to 25%, P: 0.1 to 0.9%, C: 1 to 10%, the balance: Cu and inevitable impurities And Cu in the substrate

 (Four

 The phase of the component composition consisting of Ni Sn (however, x: l.7 to 2.3, y: 0.2 to: 1.3), the phase of the component composition consisting of Cu P (where z: 0.7 to: 1.3) and the graphite phase are dispersed. Cu-Ni-Sn based copper-based sintered alloy with excellent friction characteristics and wear resistance.

The above ranges f or, or more preferably ^{f, Ni: 15~30 o / o} , Sn: 6~: 15 0/0, P: 0.1~0.5%, C: 3 to 9%. z: 0.9 to 1.2.

 In addition, the Cu_Ni_Sn-based copper-based sintered bond containing Ni, Sn and Cu described in (2) to (5) may further contain calcium fluoride: 0.3 to 6% as necessary. The calcium fluoride phase is dispersed in the base of the Cu-Ni-Sn copper-based sintered alloy containing calcium fluoride. Therefore, this invention has the following features.

(6) mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, calcium fluoride: 0 · 3-6% containing the balance: consisting of Cu and unavoidable impurities component composition, and matrix Inside Cu Ni

 (Four

 Friction characteristics and wear resistance with a composition of Sn (x: l.7 ~ 2 ・ 3, y: 0.2 ~: ί · 3) and a structure in which a calcium fluoride phase is dispersed Cu-Ni-Sn based copper-based sintered alloy with excellent resistance.

(7) mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, Ρ: 0 ·:! ~ 0 · 9%, calcium fluoride: containing 0.3 to 6%, balance: Cu And component composition consisting of inevitable impurities, and component composition consisting of Cu Ni Sn (x: l.7 to 2.3, y: 0.2 to: 1.3) in the substrate

 (Four

Phase, Cu P (however, z: 0.7 ~: 1.3)

 (Four

A Cu-Ni-Sn-based copper-based sintered alloy with a frictional structure and wear resistance that has a structure in which a volume phase is dispersed.

(8) at a mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, C: l~10%, calcium fluoride: containing 3-6% 0., balance: Cu and unavoidable impurities Ingredient composition consisting of Cu Ni Sn (where x: l.7 ~ 2 · 3, y: 0.2 ~: L 3)

(4-x-y) x y

A Cu-Ni-Sn copper-based sintered alloy with a structure in which a graphite phase and a calcium fluoride phase are dispersed and has excellent frictional characteristics and wear resistance.

(9) the mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P: 0.1~0.9%, C: 1~: 10%, off Tsu of calcium: containing 0.3 to 6% , Remainder: composition of Cu and inevitable impurities, and Cu Ni Sn (x: l.7 ~ 2.3, y: 0.2 ~: 1.3) in the substrate

 (4-x-y) x y

Phase of component composition consisting of, phase of component composition consisting of Cu P (where z: 0.7 to 1.3), graphite

 (4-z) z

Cu_Ni_Sn copper-based sintered alloy with excellent friction characteristics and wear resistance, characterized by having a structure in which the phases and calcium fluoride phase are dispersed.

 The above range is more preferably calcium fluoride: 0.5 to 5%.

 In addition, the Cu_Ni_Sn-based copper-based sintered bond containing Ni, Sn and Cu described in (2) to (5) above may further contain molybdenum disulfide: 0.3 to 6% as necessary. . The molybdenum disulfide phase is dispersed in the base of the Cu-Ni-Sn copper-based sintered alloy containing molybdenum disulfide. Therefore, this invention has the following features.

 (10) By mass%, Ni: 10-40%, Sn: 5-25%, Molybdenum disulfide: 0.3-3%, the balance: component composition consisting of Cu and inevitable impurities, and in the substrate Cu

 (4-x-y)

Ni Sn (where x: l.7 ~ 2 · 3, y: 0.2 ~: ί · 3)

X y

Cu-Ni-Sn based copper-based sintered alloy with a friction structure and wear resistance with a structure in which the molybdenum phase is dispersed.

 (11) By mass%, Ni: 10 to 40%, Sn: 5 to 25%, ·: 0 · :! to 0 · 9%, molybdenum disulfide: 0.3 to 6%, balance: Cu and Component composition consisting of inevitable impurities, and component composition consisting of Cu Ni Sn (x: l.7 ~ 2.3, y: 0.2 ~: 1.3) in the substrate

 (4-x-y) X y

Phase, Cu P (provided that z: 0.7 to 1.3) and molyb disulfide

 (4-z) z

A Cu_Ni_Sn-based copper-based sintered alloy with a structure in which den phase is dispersed and excellent in friction characteristics and wear resistance.

 (12) By mass%, Ni: 10 to 40%, Sn: 5 to 25%, C ::! To 10%, molybdenum disulfide: 0.3 to 6%, the balance: from Cu and inevitable impurities And a phase of the component composition consisting of Cu Ni Sn (x: l.7 to 2.3, y: 0.2 to: 1.3) in the substrate,

(4-xy) X y A Cu-Ni-Sn based copper-based sintered alloy with a structure in which a graphite phase and a molybdenum disulfide phase are dispersed and excellent in frictional characteristics and wear resistance.

(13) the mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:. 0. 1 ~ 0 9%, C: 1~: 10%, molybdenum disulfide: 0. 3 Containing 6%, balance: Cu and inevitable impurities

(However, x: l. 7 ~ 2.3, y: 0.2 ~: 1. 3) force,

Phase of component composition consisting of: Cu P (where z is from 0.7 to 1: 1.3), phase of component composition consisting of black lead-phase and disulfurized sulfur-molybbuddenden phase CCuu _- NNii with excellent friction and abrasion resistance and wear and wear resistance, with a textured texture in which the phases are dispersed and dispersed _- SSnn-based copper-copper-based sintered sintered alloy gold. .

 The range above is more preferably more preferred is disulfurized sulfurized morimoribudeden: 00 .. 55-55 %%. . .

 In addition, the CCuu__NNii__SSnn series copper-copper-based sintered bond containing NNii, SSnn and CCuu as described in the above ((22)) to ((55)) Fluorinated Calcium: 00 .. 33-66 %% and disulfurized according to the requirements of the alloy and further as needed Molyribbudeden: 00: good and good, containing 33-66 %%. . The CCuu —— NNii—— SSnn-based copper-copper-based sintered sintered alloy containing fluorinated cacalucium and disulfurized molybribeden here In the basement ground, the fluorinated calcal calcium phase and the disulfide sulfided molyribribeden phase are dispersed and dispersed. . Therefore, the invention of the present invention has the following characteristic features below. .

((1144)) Mass mass ⁰⁰ // ₀₀ , NNii :: 1100 ~~ 4400 %%, SSnn :: 55 ~~ 2255 %%, Fluorinated Calcium: 00 ··· Contains 33 ~ 66 %%, disulfide sulfurized momoririb buddenne: 00 .. 33 ~ 66 %%, the remainder :: CCuu and impossibility CCuu NNii SSnn ((but only, χχ :: 11 .. 77 ~~ 22 · 33, yy :: 00 .. 22 ~~: ίί · 33))

 ((44--xx--yy)) xx yy

The phase of the component composition composition, the fluorinated calcal calcium phase, and the disulfide sulfided morimoribbudden phase are dispersed and dispersed. CCuu—— NNii—— SSnn-based copper-copper base with superior rubbing and frictional properties and wear and abrasion resistance Baked and bonded alloy gold. .

((1155)) Mass mass ⁰⁰ // ₀₀ , NNii :: 1100 ~~ 4400 %%, SSnn :: 55 ~~ 2255 %%, PP :: 00 .. :: !! ~~ 00 ····· 99 %%, including fluorinated kakarushishimumu: 00 .. 33 ~ 66 %%, disulfide sulfurized momoririb buddenn: 00 .. including 33 ~ 66 %% Containing and remaining part :: CCuu and inevitable impure impure impure component composition composition consisting of material, and in the basement ground CCuu NNii SSnn ((However, xx :: 11..77 ~ 22..33, yy ::

 ((44--xx--yy)) xx yy

00 .. 22 ~~ 11 ... 33)) The phase of the compositional composition, consisting of CCuu ((but just, ζζ :: 00 ... 77 ~ 11 ... 33))

A compositional structure in which the phase of the composition of the composition, the fluorinated calcal calcium phase and the disulfide sulfided morimoribudeden phase is dispersed and dispersed. CCuu——NNii——SSnn-based copper-copper-based sintered sintered alloy gold with excellent friction and friction characteristics and anti-abrasion and wear resistance. .

((1166)) Mass mass ⁰⁰ // ₀₀ , NNii :: 1100 ~~ 4400 %%, SSnn :: 55 ~~ 2255 %%, CC :::: !! ~~ 1100 %% , Fluorinated Calciumum: 00 .. 33 ~ 66. . // ₀₀ , containing disulfide sulfurized molyribedoden: 00 .. 33--66 %% containing, remainder :: CCuu and inevitable Is it impure?

〜1. 3)からなる成分組成の相、黒鉛相、フッ化カルシウム相および二硫化モリブデ ン相が分散している組織を有する摩擦特性および耐磨耗性に優れた Cu— Ni— Sn 系銅基焼結合金。 ((But, xx :: ll..77 ~~ 22..33, yy :: 00..22

Cu-Ni-Sn-based copper with excellent frictional properties and wear resistance, having a structure in which the compositional phase consisting of ~ 1.3), graphite phase, calcium fluoride phase and molybdenum disulfide phase are dispersed Base sintered alloy.

(17) the mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:. 0. 1~0 9%, C: 1~10%, off Tsu of calcium: 0. 3 6 / ₀ , Molybdenum disulfide: 0.3 to 6%, the balance: Cu and inevitable impurities component composition, and Cu Ni Sn in the substrate (x: 1

 (4-x-y) x y

 7-2.3, y: 0.2-2: 1. 3) component composition phase, Cu P (where z: 0.7-7: 1.

 (4— z) z

 3) Cu-Ni-Sn based copper-based sintered alloy with excellent frictional properties and wear resistance with a structure in which the phase of the component composition, graphite phase, calcium fluoride phase and molybdenum disulfide phase is dispersed .

 The above ranges are more preferably calcium fluoride: 0.5-5% and molybdenum disulfide: 0.5-5%.

 The invention's effect

 [0010] The Cu-Ni-Sn-based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention described in the above (1) to (17) is a bearing material for various electric parts and mechanical parts, It is particularly effective as an oil-impregnated bearing material because it exhibits superior friction characteristics and wear resistance, and is particularly effective when used as a bearing material for shafts with a large number of revolutions.

 Brief Description of Drawings

 [0011] Fig. 1 is a schematic diagram of a thread-weave of a Cu-Ni-Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

 FIG. 2 is a schematic diagram of a thread and weave of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

 FIG. 3 is a schematic diagram of a thread and weave of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

 FIG. 4 is a schematic view of a thread and weave of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

FIG. 5 is a schematic diagram of the structure of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention. FIG. 6A is a plan view showing an example of an embodiment of a bearing made of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

 FIG. 6B is a cross-sectional view showing an example of an embodiment of a bearing made of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention.

 BEST MODE FOR CARRYING OUT THE INVENTION

In order to produce a Cu—Ni—Sn-based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention described in (1) to (: 17) above, prepare.

 Ni: Cu—Ni alloy powder having a composition of 5 to 45% by mass, the balance being Cu and inevitable impurities.

 Cu—Ni—Sn alloy powder containing Ni: 25 to 60%, Sn: 5 to 60%, and the balance: Cu and an inevitable impurity component composition.

 Sn powder.

 P: Cu—P alloy powder containing 8% by mass, with the balance being Cu and inevitable impurities.

 Graphite powder.

 Calcium fluoride powder.

 Molybdenum disulfide powder.

 These raw material powders are blended so as to have the component compositions described in the above (1) to (: 17) and mixed to prepare a mixed powder. The green compact obtained by compression molding this mixed powder is sintered at a temperature higher than the conventional sintering temperature: 700 to 950 degrees. It is obtained by immediately cooling the obtained sintered body at a slower cooling force than the conventional cooling rate (15 degrees / minute or more), a cooling rate of 5 to 10 degrees Z minutes.

 The Cu_Ni_Sn copper-based sintered gold with excellent friction characteristics and wear resistance obtained in this way has pores dispersed and distributed in the base at a porosity of 5 to 25%.

 The sintering temperature is preferably 900 to 1080 degrees, more preferably 900 to 980 degrees. FIG. 6A and FIG. 6B are a plan view and a cross-sectional view showing an example of an embodiment of a bearing made of a Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance.

[0013] Next, Cu-Ni-Sn-based copper-based sintering with excellent friction characteristics and wear resistance of the present invention Alloy yarn and Cu Ni Sn (however, χ: 1 · 7 ~ 2 · 3, y: 0.2 ~: ί · 3)

 (4-x-y) x y

 The reason for limiting X and y in the component composition phase as described above will be described.

[0014] (A) Reason for limitation of component composition

 (a) Ni

 Ni is a component that improves strength, frictional properties, and wear resistance in a high temperature environment, but if its content is less than 10%, the desired effect cannot be obtained, while if it exceeds 40%, it is a high temperature environment. This is preferable because the resistance between the sliding surface with the shaft below increases and the wear increases rapidly. Therefore, the Ni content contained in the Cu—Ni—Sn based copper-based sintered alloy of the present invention is determined to be 10 to 40%.

[0015] (b) Sn

 The Sn component forms a solid solution of Cu and Ni and improves the strength of the bearing and contributes to improving the wear resistance of the bearing. The desired strength improvement effect cannot be obtained, but if the content exceeds 25%, the aggressiveness against the stainless steel shaft, which is the counterpart material, increases rapidly, and the wear of the stainless steel shaft is promoted. Therefore, the content was determined to be 5 to 25%.

[0016] (c) P

 P component improves the sinterability during sintering, and thus has the effect of improving the strength of the substrate, that is, the strength of the bearing. Therefore, if the content of S and P is less than 0.1%, This is unfavorable because sufficient strength cannot be obtained, and therefore sufficient strength cannot be obtained. On the other hand, if the content exceeds 0.9%, the strength of the grain boundary portion decreases rapidly. Therefore, it is preferable because the strength of the sintered alloy is lowered. Therefore, the content of the P component is set to 0.:! To 0.9%.

[0017] (d) C

C component exists as free graphite whose main component is dispersed and distributed on the substrate, and improves the lubricity of the bearing, thereby contributing to the improvement of the wear resistance of the bearing and stainless steel shaft. However, if the content is less than 1%, the dispersion distribution ratio of the free graphite is insufficient, and the desired excellent lubricity cannot be ensured. On the other hand, if the content exceeds 10%, the bearing The strength of the steel will drop sharply, and wear will progress rapidly. Therefore, the content was determined to be 1 to 10%.

[0018] (e) Calcium fluoride

 Calcium fluoride has the effect of significantly improving seizure resistance, so it is added as necessary.However, if its content is less than 0.3%, the desired effect cannot be obtained, while it exceeds 6%. Then, the strength is lowered, and the strength, friction characteristics and wear resistance are further lowered. Therefore, the content of calcium fluoride is set to 0.3 to 6%.

 [0019] (f) Molybdenum disulfide

 Molybdenum disulfide has the effect of improving seizure resistance, so it is added as necessary, but if its content is less than 0.3%, the desired effect cannot be obtained, while it exceeds 6%. As a result, the strength is lowered, and the strength, friction characteristics and wear resistance are further lowered. Therefore, the content of calcium fluoride is set to 0.3 to 6%.

 [0020] (B) Reason for limitation of phase consisting of Cu Ni Sn

 (4 y) y

 In the Cu Ni Sn force phase, x and y are respectively x: 1 · ~ 2.3, y: 0

(4— x— y) x y

 2 ~: 1. 3 is determined by sintering at a higher temperature than normal: 900-1080 degrees, and by cooling more slowly than usual, a high hardness CuNi Sn phase is mainly contained in the substrate. Power to generate

 2

 The formation of a completely CuNi Sn phase is rare. If Cu Ni Sn is used, x: 1. 7

 2 (4— x— yj x y

 ~ 2 · 3, y: 0. 2 ~: It may become a phase in the range of ί · 3, and if it has a strong x and y, the frictional characteristics and wear resistance will be improved. is there.

 Example 1

 The Cu—Ni—Sn based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention will be specifically described with reference to examples. The following was prepared as a raw material powder.

 Average particle size: 150 zm or less Ni: 15 to 42.5% by mass Atomized Cu_Ni powder with a composition of the remainder consisting of Cu and inevitable impurities.

 Cu—Ni—Sn alloy powder having an average particle size of 150 / im or less, containing Ni: 25 to 60%, Sn: 5 to 60%, and the balance: Cu and inevitable impurities.

 Atomized Sn powder with an average particle size of 20 μm.

Cu-P alloy (Cu-8.4% P eutectic alloy) powder with an average particle size of 150 / m or less. Graphite powder with an average particle size of 20 _β m.

 Average particle size: CaF powder of 60 μm.

 2

 Average particle size: MoS powder of 150 μm or less.

 2

 [0022] These raw material powders prepared previously were blended so as to have the final component compositions shown in Tables 1 and 2, and 1% stearic acid was added and mixed for 20 minutes in a V-type mixer. After that, press molding is performed to produce a green compact, and this green compact is sintered at a predetermined temperature in the range of temperature: 900 to 1080 degrees in an ammonia decomposition gas atmosphere. X Inner Diameter: 8mm X Height: 8mm The present invention having the component composition and porosity shown in Table:! ~ 2 Cu _ Ni _ Sn based copper-based sintered alloy 1-16, comparative Cu Ring-shaped test pieces made of _Ni_Sn based copper-based sintered alloys 1 to 8 and conventional Cu_Ni_Sn based copper-based sintered alloys 1 to 3 were prepared. The above-mentioned obtained Cu—Ni—Sn based copper-based sintered alloy of the present invention:! ˜16 representative ring-shaped specimens were observed with EPMA, and the structure that was observed and copied was schematically shown. It is shown in Figs. Fig. 1 is a schematic diagram of the structure of the Cu-Ni-Sn-based copper-based sintered alloy 1 of the present invention, and Fig. 2 is a schematic diagram of the structure of the Cu-Ni-Sn-based copper-based sintered alloy 3 of the present invention. Fig. 3 is a schematic diagram of the structure of the Cu-Ni-Sn-based copper-based sintered alloy 4 of the present invention. Fig. 4 is a schematic diagram of the Cu-Ni-Sn-based copper-based sintered alloy 8 of the present invention. FIG. 4 is a schematic diagram of the Cu—Ni—Sn based copper-based sintered bond 16 of the present invention.

 [0023] The obtained present invention Cu-Ni-Sn-based copper-based sintered alloys 1-16, comparative Cu-Ni-Sn-based copper-based sintered alloys 1-8, and conventional Cu-Ni-Sn-based copper-based alloys Cu-Ni-Sn copper-based sintered alloy 1-16, comparative Cu-Ni-Sn system of the present invention impregnated with synthetic oil in a ring-shaped test piece made of sintered alloy 1-3 The following tests were conducted using ring-shaped specimens consisting of copper-based sintered alloys 1-8 and conventional Cu-Ni_Sn copper-based sintered alloys 1-3.

The present invention impregnated with synthetic oil Cu_Ni_Sn-based copper-based sintered alloys 1-16, comparative Cu_Ni_Sn-based copper-based sintered alloys 1-8 and conventional Cu_Ni_Sn-based copper-based sintered alloys 1- The ring-shaped test piece consisting of 3 was heated to 120 degrees, a load was applied to this heat-controlled ring-shaped test piece from the radial direction, and the crushing load when the ring-shaped test piece broke was measured. Table 1 and 2 show the strength and toughness.

 [0024] Abrasion resistance test:

 The present invention impregnated with synthetic oil Cu-Ni-Sn-based copper-based sintered alloys 1-16, comparative Cu-Ni_Sn-based copper-based sintered alloys 1-8 and conventional Cu_Ni_Sn-based copper-based sintered alloys 1- Insert a SUS304 6S finish shaft into a ring-shaped test piece consisting of 3 Cu_Ni_Sn copper-based sintered alloy 1-16, comparative Cu_Ni_Sn-based copper-based sintered alloy 1-8 and conventional Cu_Ni_Sn-based Load in the radial direction (perpendicular to the axial direction of the shaft) of the ring-shaped test piece made of copper-based sintered alloy 1 to 3 The ring test described above while applying 2 MPa from the outside of the ring-shaped test piece The test was performed by heating the piece to 120 degrees, rotating the shaft for 30 minutes at 50 m / min, measuring the maximum wear depth of the inner diameter of the test piece after the test, and the results are shown in Table 1. The strength, friction characteristics and wear resistance were evaluated by showing in ~ 2.

 [0025] Seizure resistance test:

 The present invention impregnated with synthetic oil Cu-Ni-Sn-based copper-based sintered alloys 1-16, comparative Cu-Ni Sn-based copper-based sintered alloys 1-8 and conventional Cu-Ni-Sn-based copper-based sintered alloys Insert a SUS304 6S-finished shaft into a ring-shaped test piece consisting of 1 to 3, and according to the present invention Cu-Ni-Sn copper-based sintered alloy 1-16, comparative Cu-Ni-Sn-based copper-based sintered alloy 1 Up to 8 and conventional Cu-Ni-Sn based copper-based sintered alloy 1 to 3 ring-shaped specimens are kept at a temperature of 120 degrees, and the radial direction of the ring-shaped specimens (perpendicular to the shaft axial direction) ) While rotating the shaft at 50 m / min for 30 minutes, increasing the load stepwise, and measuring the load when seizure occurs as the seizure load. The results are shown in Tables 1-2. The seizure resistance was evaluated by showing.

[0026] [Table 1] 0027

産業上の利用可能性

Industrial applicability

 The Cu—Ni—Sn-based copper-based sintered alloy having excellent friction characteristics and wear resistance according to the present invention described in the above (1) to (: 17) is a bearing material for various electric parts and machine parts, particularly oil-impregnated. It exhibits excellent friction characteristics and wear resistance as a bearing material, and is particularly effective when used as a bearing material for shafts with a large number of revolutions because it provides a long life.

Claims

The scope of the claims  [1] Cu Ni Sn in the base of Cu_Ni_Sn based copper-based sintered alloy containing Ni, Sn and Cu  (4-x-y) x (Wherein x: l.7 to 2.3, y: 0.2 to: 1.3)  A Cu_Ni_Sn-based copper-based sintered alloy characterized by comprising: [2] By mass%, Ni: 10-40%, Sn: 5-25%, balance: component composition consisting of Cu and inevitable impurities, and Cu Ni Sn (provided x: l. 7-2.3, y: 0.2  (4 x— y) x y  A Cu-Νi-Sn-based copper-based sintered alloy characterized by having a structure in which phases of component compositions consisting of ~ 1 · 3) are dispersed. [3] By mass%, Ni: 10 to 40%, Sn: 5 to 25%, P: 0 .:! To 0.9%, the balance: the component composition consisting of Cu and inevitable impurities, and Cu Ni Sn in the substrate (x: 1  (4- y  .7〜2 ・ 3, y: 0.2〜1 ・ 3)

 A Cu-Νi-Sn-based copper-based sintered alloy characterized by having a structure in which phases of component compositions consisting of ~ 1 · 3) are dispersed. [4] By mass%, Ni: 10 to 40%, Sn: 5 to 25%, C: l to: 10%, balance: component composition consisting of Cu and inevitable impurities, and Cu in the substrate Ni Sn (x: 1.7  (4-x-y) x y  A Cu_Ni_Sn-based copper-based sintered alloy characterized by having a structure in which a phase having a component composition of ~ 2.3, y: 0.2 ~: 1.3) and a graphite phase are dispersed. [5] Mass ⁰ /. Ni: 10 to 40%, Sn: 5 to 25%, P: 0 .:! To 0.9%, C: 1 to 10%, the balance: component composition consisting of Cu and inevitable impurities, and substrate Inside Cu Ni Sn  (4-x-y) x y (Where x: l.7 ~ 2 ・ 3, y: 0.2 ~ 1 ・ 3), Cu P (where  A Cu_Ni_Sn-based copper-based sintered alloy characterized by having a structure in which a phase having a composition of (4-z) z z: 0.7 to 1.3) and a graphite phase are dispersed. [6] Mass: ⁰ / o, Ni: 10 to 40%, Sn: 5 to 25%, Calcium fluoride: 0.3 to 6%, balance: component composition consisting of Cu and inevitable impurities, and in the substrate Cu Ni Sn  (4-x-y) x y (Wherein x: l.7 ~ 2 · 3, y: 0.2 ~: L3) Cu—Ni, characterized by having a structure in which the phase of the component composition and the calcium fluoride phase are dispersed — Sn-based copper-based sintered alloy. In [7] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:. 0 1 ~ 0.9%, Futsui spoon Kanoreshiumu: 0.3 Containing ~ 6%, the balance: component composition consisting of Cu and inevitable impurities, and in the substrate Cu Ni Sn (however, x: l. 7 ~ 2 · 3, y: 0.2 ~: L 3) The component composition phase and the calcium fluoride phase are (4-z) z  A Cu-Ni-Sn-based copper-based sintered alloy characterized by having a dispersed structure. [8] Mass: ⁰ / o, Ni: 10-40%, Sn: 5-25%, C: 1-10%, Calcium fluoride: 0.3-6%, the balance: Cu and inevitable impurities Ingredient composition consisting of Cu in the substrate  (Four Ni Sn (x: l. 7-2.3, y: 0.2-2: 1. 3) component composition phase, graphite phase and calcium fluoride phase Characteristic Cu_Ni_S n-based copper-based sintered alloy. [9] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:.. 0 1~0 9%, C: 1~: 10%, fluoride force Rushiumu: 0.3 Containing ~ 6%, the balance: Cu and inevitable impurities component composition, as well as Cu Ni Sn in the substrate (x: l. 7-2.3, y: 0.2-: 1.3) Composed of  (Four  Component phase consisting of Cu P (where z: 0.7 to: 1.3), graphite phase and  (4-z) z  A Cu-Ni-Sn copper-based sintered alloy characterized by having a structure in which a calcium fluoride phase is dispersed. In [10] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, molybdenum disulfide: 0 · 3-6% containing the balance: component composition consisting of Cu and inevitable impurities, and matrix Inside Cu Ni Sn  (Four  (Wherein, χ: 1 · 7 to 2 · 3, y: 0: 2 to: ί · 3) and a composition having a structure in which the phase of molybdenum disulfide and the molybdenum disulfide phase are dispersed — Ni— Sn-based copper-based sintered alloy In [11] mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P: 0:.! ~ 0 · 9%, molybdenum disulfide: 0.  Containing 3 to 6%, the balance: composition of Cu and inevitable impurities, and Cu Ni Sn in the substrate (however, x: l. 7-2.3, y: 0.2-2: 1. 3) A component composition phase comprising: (Four  A phase of component composition consisting of Cu P (however, z: 0.7 to: 1. 3) and a molybdenum disulfide phase. (4-z) z  A Cu_Ni_Sn-based copper-based sintered alloy characterized by having a structure in which is dispersed. In [12] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, C: l~10%, molybdenum disulfide containing 3-6% 0., balance: Cu and unavoidable impurities Ingredient composition consisting of Cu in the substrate  (Four Ni Sn (x: l. 7-2.3, y: 0.2-2: 1. 3), a compositional phase, a graphite phase, and a molybdenum disulfide phase. Characteristic Cu_Ni_ Sn-based copper-based sintered alloy. [13] Mass ⁰ /. Ni: 10-40%, Sn: 5-25%, P: 0.:! ~ 0 · 9%, C: 1 ~: 10%, Molybdenum disulfide: 0.3-6%, the balance: Component composition consisting of Cu and inevitable impurities, and Cu NiSn (x: l.7 to 2.3, y: 0.2 to: 1.3) in the substrate  (Four  Phase of component composition, phase of component composition consisting of Cu P (z: 0.7 ~: 1.3), graphite phase  (4-z) z  And Cu_Ni_Sn based copper-based sintered alloy characterized by having a structure in which the molybdenum disulfide phase is dispersed. In [14] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, calcium fluoride: 0.3 to 6 percent, disulfide molybdenum: contains 0.3 to 6 percent, and the balance: Cu and unavoidable Ingredient composition composed of impurities, and Cu NiSn (x: l.7 to 2.3, y: 0.2 to 1.3) in the substrate  (Four  A Cu_Ni_Sn-based copper-based sintered alloy characterized by having a structure in which a composition phase, a calcium fluoride phase, and a molybdenum disulfide phase are dispersed. In [15] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:. 0 1 ~ 0.9%, Futsui spoon Kanoreshiumu: 0.3 to 6%, molybdenum disulfide and 0.3 to 6% Contain and balance: component composition consisting of Cu and inevitable impurities, and Cu Ni Sn in the substrate (however, χ: 1.7 ~ 2 · 3, y: 0.2 ~  (Four  1.3) component composition phase, Cu P (z: 0.7 ~: ί · 3) component composition  (4-z) z  Cu-Ni-Sn-based copper-based sintered alloy characterized by having a structure in which the phases of calcium, calcium fluoride and molybdenum disulfide are dispersed. In [16] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, C: l~: 10%, calcium fluoride: 0 · 3-6% molybdenum disulfide: from 0.3 to 6% Ingredients composed of Cu and inevitable impurities, and Cu NiSn in the substrate (however, χ: 1 · 7∼2 · 3, y: 0.2∼: ί ·  (Four-  A Cu_Ni_Sn-based copper-based sintered alloy characterized by having a structure in which a phase having a component composition comprising 3), a graphite phase, a calcium fluoride phase, and a molybdenum disulfide phase is dispersed. In [17] Mass _{^{0/0, Ni: 10~40%}} , Sn: 5~25%, P:. 0 1~0.9%, C: 1~: 10%, fluoride force Rushiumu: from 0.3 to 6%, Molybdenum disulfide: 0.3-6. /. And the balance: Cu and inevitable impurities component composition, and Cu Ni Sn in the substrate (x: l.7-2  (Four  .3, phase of component composition consisting of y: 0.2-1.3), Cu P (where z: 0.7-1.3)  (4-z) z The component phase, graphite phase, calcium fluoride phase and molybdenum disulfide phase are dispersed. Cu-Ni-Sn-based copper-based sintered alloy characterized by having a microstructure. A bearing material comprising the Cu—Ni—Sn-based copper-based sintered alloy according to claim 1.