DE2823599A1 - Nickel-copper-manganese alloy - has a high magnetostriction and yield limit - Google Patents

Abstract

The Ni alloy has a magnetostriction of -50x10-6 after being heat treated at 700-1200 degrees C and has the compsn. 0.05-6.5 wt.% Mn, 0.01-6 wt.% Cu, 0.01-5 wt.% of metals Ti, V, Mo, Cr, W, Nb or Ta, balance Ni. The alloy is less costly to produce as it does not contain Co. Used for magnetic oscillators for mining equipment such as drills, for sonic and ultrasonic oscillators, in ultrasonic cleaning equipment and for use in deep water.

Description

NECK BASED ALLOY

The invention relates to non-ferrous metallurgy, in particular to alloys based on nickel.

The. Invention can be used in the manufacture of magnetos Striktionsalligierungen for use, e mainly find construction of sonic and ultrasonic transducers Use In addition, nickel alloys are used in the manufacture of magnetostrictive ones Converters used as components of underwater locomotives and echo sounders, for the intensification of technological processes (e.g. in metallurgy) and serve for the ultrasonic cleaning of products.

in recent years are based on magnetostrictive Schwingern drilling rigs with magnetostrictive transducers have been developed in which the drilling device also performs a pendulum motion in addition to the known turning.

One consequence of this was a sharp increase in the performance of the Drilling rig.

As is well known, the effectiveness of magnetostrictive transducers is around the higher, the coarser the oscillation amplitude, with the latter in turn as the absolute value of the static saturation magnetostriction increases.

Among the materials used in the manufacture of magnetostrictive transducers Most of them have technical nickel and its alloy with 4 wt. cobalt enforced.

a strip made of pure nickel is known to have a magnetostriction of -35 x 10-6 and a tape from the said nickel - cobalt alloy depending on the process technology a magnetostriction of -30 x 10 to -45 x 10 6. An increase in magnetostriction the nickel-cobalt alloy is 95% iger by vacuum melting and cold rolling deformation achievable. It has a disadvantageous effect with pure nickel, that with him high idagnetostriction (more than -40 x 10-6) cannot be achieved as a disadvantage the above-mentioned nickel-cobalt alloy, on the other hand, has an expensive and relative content rarely occurring cobalt. In addition, the nickel-robalt alloy has low mechanical properties - after annealing the strip at 800 to 9000C the 0.2 yield strength is characterized at 6 kp / mm², It is known that a tape is made of Pure nickel has a magnetostriction of approx. -50 x 10 6, but this is practical only is recorded when the annealing temperature for this strip does not exceed 700 up to 750 ° C. The manufacturing technology of magnetostrictive transducers closes an increase of the band up to 800 to 100,000. At this temperature takes place the secondary recrystallization takes place and the magnetostriction falls to a value from -35 x 10-6.

In addition, pure nickel has the disadvantage that it is 0.2 yield strength is low (approx. 4 kp / mm2), which makes the properties unfavorable influenced.

Well-known alloys based on the nickel-cobalt system (with additions of 2% by weight silicon and 2% by weight chromium) have magnetostriction of not more than -25 x 10-6. Furthermore, an alloy is known in which 7 to 27 % By weight Mn and one or more elements from the following group: iron (0 to 10 % By weight), vanadium (0 to 9% by weight), silicon (0 to 5% by weight), titanium (0 to 7% by weight), Molybdenum (0 to 8% by weight), aluminum (0 to 6% by weight), chromium (0 to 6% by weight), tungsten (0 to 9% by weight), Aatinon (0 to 11% by weight), tin (0 to 10% by weight), cobalt (0 to 22% by weight), copper (0 to 10% by weight), the remainder being nickel. This alloy is characterized by a relatively low magnetostriction of max. - 20 x 10-6 the end.

The purpose of the invention is to eliminate the disadvantages mentioned.

The invention aims to provide a nickel-based alloy, in addition to a high 0.2 yield strength (high mechanical properties) has a large magnetostriction value.

This object is achieved in that in an alloy based on nickel, in which manganese, copper and at least one of the following elements: titanium, vanadium, Molybdenum, chromium, tungsten, niobium, tantalum are included, according to the invention aie named components are present in terms of quantity as follows: 0.05 to 6.5 wt. » ; dangaa 0.01 to 6 wt.% copper 0.01 to 5 wt.% of at least one of the elements: Titanium, vanadium, molybdenum, chromium, tungsten, the remainder niobium, tantalum nickel.

The alloy according to the invention is characterized by magnetostriction from -50 x 10-6 after annealing at a temperature of 700 to 12000C and one 0.2 yield strength from 6.5 to 20 kp / mm2.

Further advantages of the present invention are set out below detailed description of the nickel-based alloy using exemplary embodiments explained.

The present invention provides a nickel-based alloy proposed in which as alloy elements manganese and copper and as a high-melting point Elements necessary for the required alloy strengthening, titanium and / or Vanadium and / or molybdenum and / or chromium and / or tungsten and / or niobium and / or Tantalum are included.

When choosing the ingredients of desire and determining the cheapest Levels should be guided by the fact that magnetostriction follows the alloy structure and the size of the magnetostriction constants (for pure nickel are they maximum) directed. When alloying nickel, the two influencing factors change. The choice of alloying elements and their content in the alloy are as follows Conditional considerations: 1. The additions may contain the constants l lOO ß bll if possible don't influence too much.

2. It is necessary to have a very strong hardening of the alloy.

3. When glowing in air, one should appear on the surface the alloy made tape form a solid oxide skin that through high electrical resistance and good adhesion to the metal.

Based on these considerations, copper and manganese were considered fundamental Alloy elements, which reduce the constants # 100 # 111 (according to the absolute value) minimally, as well as titanium, vanadium, molybdenum, chromium, tungsten, niobium and tantalum as high-melting points Elements chosen for the desired strengthening of the alloy.

The minimum contents of the additives for the alloy according to the invention based on nickel were based on the properties of the aforementioned oxide skin and determined by the annealing strength of the alloy structure in such a way that the higher the annealing temperature, the greater these contents should be. The maximum Additional contents in the alloy were chosen so that this is sufficient high magnetostriction and yield strength can be achieved.

It has been found that with a manganese content of over 6.5% by weight and of copper by 0.01% by weight, in the alloy according to the invention one or more refractory elements (Ti, V, Mo, Cr, W, Nb, Ta) in a proportion of over 5 to% by weight are contained, the magnetostriction down to - (20 25) x 10-6 falls off. At the same time, the required stability remains with the maximum values mentioned Alloy structure obtained after annealing at 1100 to 11500C. Additionally was experimentally proven that with the increase in the copper content of the alloy up to 6% by weight the heat resistance of the alloy structure increases; however, if the Eupfer salary is above this value, the heat resistance of the structure practically changes no longer.

If, in the alloy according to the invention, less than 0.05% by weight, Mn less than 0.01 wt.% Cu and less than 0.01 wt.% of one or more of the named If it contains refractory elements, the alloy structure is already at a temperature of 750 ° C inconsistent, resulting in a strong decrease in magnetostriction to Polge has. In addition, when reducing the specified minimum amount of the additives in the alloy do not affect the mechanical properties of the latter are more superior to those of pure nickel, i.e. it is the alloy's low yield strength to be recorded.

Thus, the alloy according to the invention, in which 0.05 to 6.5 % By weight Mn, 0.01 to 6% by weight Cu and 0.01 to 5% by weight Ti and / or V and / or Mo and / or Cr and / or W and / or Nb and / or Ta and the remainder (up to 100% by weight) Ni is, a magnetostriction of -50 x 106 after the annealing at a temperature of 700 to 12000C as well as a 0.2 proof stress of 6.5 to 15 or. 20 kp / mm2. By the heating of a strip made from the alloy according to the invention a temperature of 700 to 12000C covers its surface with a solid Oxide skin that allows magnetostrictive transducers to be used as stratified bundles of strips to make. It should also be noted that in the production of high-performance, heavily loaded vibrators an alloy according to the invention with maximum content to be used on alloy elements (mainly on high-melting points), whereby however the magnetostriction decreases.

For lightly loaded oscillators, on the other hand, alloying is economical displayed, because this results in high magnetostriction values and a yield strength from 6.5 to 8 kp / mn2 achieved.

Example 1.

An alloy with a content of 95.5% by weight Ni, 2.0% by weight Cu, 2.0 wt.% Mn, 05 wt.% Ti is in the induction furnace with a protective gas (argon) in melted in a magnesite crucible. Cathode nickel and copper are used as feedstock placed in the crucible, the mixture is melted and then then the melt is deoxidized in the usual way. Weighed in from Mn and Ti, after which the alloy is poured into a cast iron mold.

The billet with a thickness of 110 mm is made on a hot rolling mill Rolled down to a thickness of 12 mm at 110,000, milled and on cold rolling mills rolled to a thickness of 0.2 mm with intermediate annealing at 750%.

The produced tape becomes samples 200 x 10 x 0.2 mm for the determination the magnetostriction and the yield point cut.

To measure the magnetostriction are on a sample on both of them Strain gauges connected in series with a resistance of each 200 ohms glued in bridge circuit. The bridge adjustment takes place with the help of of a resistance magazine with an accuracy of 10 4. The sample is in a Solenoid housed in which a magnetic field with a strength of 20 to 500 Oe prevails. The magnetostriction of the sample causes a detuning in the bridge circuit caused by a photoelectric amplifier and a galvanometer is registered. The detuning quantity # R is further Bridge adjustment measured with the aid of the resistance magazine.

In the saturation field, the bridge detuning A R was 375 x 10-4 ohms. The magnetostriction is calculated using the following formula: # = ##, where R is the overall resistance of the strain gauges attached to the specimen and C is a tensosensitivity factor of the donors, equal to 2.04.

375 x # = ### # #### = 46 x 10-6.

The yield strength of the tested sample was 9.5. Example 2.

An alloy with a content of 93.48% by weight Ni, 0.01% by weight Cu, 6.5 wt.% Mn and 0.01 wt.% Nb is placed in a magnesite crucible in the induction furnace melted a flux layer. Katohdennickel and -copper are used as input goods placed in the crucible, the mixture is melted, and then the melt Weights of Mn and Nb are set. The sodana alloy is poured into a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill at a temperature rolled from 11000C to a thickness of 12 mm, milled and then on: cold rolling mills rolled to a thickness of 0.2 mm with intermediate anneals at 7500C.

Aem produced tape becomes samples 200 x 10 x 0.2 mm for measurement by magnetostriction and the yield point.

The measurement of the # size is carried out according to that described in Example 1 Method.

The magnetostriction of the tested sample was -25x10-6 and the Yield strength 17 kp / mm2.

Example 3.

An alloy containing 94.8 wt.% Ni, 0.1 wt.% Cu, 0.1 Wt. Mn and 5.0 wt /% Cr is in the induction furnace in a magnesite crucible under vacuum melted.

Cathode nickel and copper are added to the crucible as charge and melted, after which manganese and chromium weights are added. Then shed put the alloy into a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill at a temperature rolled from 11000C to a thickness of 12 mm, milled and on cold rolling mills 0.2 mm rolled down with intermediate anneals at a temperature of 7500C.

The produced tape becomes samples 200 x 10 x 0.2 mm for measurement the magnetostriction and the yield point cut.

The measurement of the # size proceeds according to that described in Example 1 Method.

The magnetostriction of the tested sample was -23 x 10-6 and the yield strength to 26 kp / mm2.

Example 4.

An alloy in which 93.45 wt.% Ni, 6.0 wt.% Cu, 0.05 wt.% Mn and 0.5 wt.% W are contained in the induction furnace in a magnesite crucible in argon atmosphere melted. Cathode nickel and copper introduced as feed into the crucible and melted, after which the melt in is usually deoxidized. Then you add manganese and tungsten weights a. The alloy is then poured into a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill at a temperature rolled down from 11000C to a thickness of 12 mm, milled and on cold rolling mills rolled to a thickness of 0.2 min with intermediate anneals at 7500C.

Samples measuring 200 x 10 x 0.2 mm are made from the tape for measurement the magnetostriction and the yield point cut out.

The measurement of the # size is carried out according to the one described in the example Method made.

The magnetostriction of the tested sample was -48 x 10 -6 and the yield strength 10 kp / mm².

Example 5.

An alloy with a content of 99.84 wt. Ni, 0.01 wt.% Cu, 0.05 wt.% Mn and 0.1 wt.% V is placed in a magnetosite crucible in the induction furnace Vacuum melted.

Cathode nickel and copper are added to the crucible as charge and melted, after which the melt is deoxidized in the usual way. Afterward Manganese and vanadium weights are entered. The alloy is then cast in a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill at A temperature of 11000C to a thickness of 12 mm rolled, milled and on cold rolling mills rolled to a thickness of 0.2 mm with intermediate annealing at 750 ° C.

The produced tape becomes samples 200 x 10 x 0.2 mm for measurement the magnetostriction and the yield point cut out.

The measurement of the # size is carried out according to that described in Example 1 Procedure.

The magnetostriction of the tested sample is -52 x 10-6 and the Yield strength 5.5 kp / mm².

Example 6.

An alloy with a content of 96.5 wt.% Ni, 2.0 wt.% Cu, 1.0 wt.% Mn and 0.5 wt.% Mo is placed in a magnesite crucible in the induction furnace melted a layer of flux. Cathode nickel and copper are used as feed abandoned in the crucible and melted, after which the melt in the usual way is deoxidized. You enter manganese and molybdenum unbalances and cast the alloy in a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill at a temperature rolled from 11000C to a thickness of 12 mm, milled and on cold rolling mills further rolled to a thickness of 0.2 mm with intermediate anneals at 75,000.

Samples 200 × 1C × 0.2 mm are made from the produced tape for determination the magnetostriction and the yield point cut out.

The value of # is determined using the method described in Example 1 measured.

The magnetostriction of the tested sample amounts to -48 x 10 6 and the yield strength to 6.5 kp / mm².

Example 7. (Comparative Example) An alloy with a content of 99.98% by weight Ni, 0.005% by weight Cu, 0.01% by weight Mn, 0.005% by weight W is used in an induction unit melted in an argon atmosphere in a magnesite crucible. Cathode nickel and copper are placed in the crucible as a batch and melted, after which the metal is in is usually deoxygenated. You enter manganese and wool weights and cast the alloy in a cast iron mold.

The billet with a thickness of 110 mm is made on a hot rolling mill rolled at 11000C to a thickness of 12 mm, milled and on cold rolling mills rolled down to a thickness of 0.2 mm with intermediate annealing at 750 ° C.

Samples of 200 × 10 × 0.2 mm are made from the produced tape for measurement the magnetostriction and the yield point made.

The measurement of the jt value is carried out according to the example 1 method explained.

The magnetostriction of the tested sample amounts to -38 x 10-6 and the yield strength to 4.0 kgf / mm².

Example 8 (comparative example) An alloy in which 92.94 Wt.% Ni, 0.05 wt. Cu, ?, 00 wt.% Mn and 0.01 wt.% Cr is melted in an induction furnace with an argon atmosphere in the magnesite crucible. Cathode nickel and copper are put into the crucible as charge and melted, after which the metal is deoxidized in the usual way. One gives kangan- and chromium weights and cast the alloy in a cast iron mold.

The 110 mm thick billet is processed on a hot rolling mill at 1100 ° C a thickness of 12 mm rolled, milled and on cold rolling machines to 0.2 mm under Intermediate anneals rolled at 750 ° C.

The produced tape becomes samples 200 x 10 x 0.2 mm for measurement the magnetostriction and the yield strength.

The measurement of the # size is carried out according to that described in Example 1 Method.

The magnetostriction of the tested sample amounts to -20 x 10-6 and the limit of elasticity to 16 kgf / mm². Example 7 An alloy containing 97.94 wt / o Ni, 1.0 wt% Cu, 1.0 wt% Mn, 0.01 wt% Ti and 0.05 wt% Mo will be Melted in an induction furnace with a protective argon atmosphere in the magnetite crucible. Cathode nickel and copper are added to the crucible as a batch and melted, after which the metal is usually deoxidized. You then give manganese molybdenum and titanium egg scales and pour the material into a cast iron mold.

About 110 mm thick billet is produced on a hot rolling mill at 1100 ° C a thickness of 12 mm rolled, milled and on cold rolling mills to a thickness of 0.2 mm rolled down with intermediate annealing at 750 ° C.

Samples 200 × 10 × 0.2 mm are made from the produced tape for measurement the magnetostriction and the yield point cut out.

The measurement of the magnetostriction runs according to that set out in Example 1 ltiethode off.

the magnetostriction of the tested sample is -46 x 1016 and their Yield strength 7.0 kp / mm2.

Example 8.

An alloy with a content of 97.1% by weight ili, 2.0% by weight Cu, 0.5 wt.% Mn, 0.1 wt.% Mo, 0.3 wt.% Cr is an induction furnace in the magnesite crucible melted under a layer of flux. Cathode nickel and copper will be given as feed into the crucible and melted, then into the melt Manganese, molybdenum and chromium weights entered, followed by casting of the alloy in a cast iron mold follows.

The 110 mm thick billet is rolled on a hot rolling mill at a temperature rolled from 1100 ° C to a thickness of 12 mm, milled and on cold rolling mills rolled a thickness of 0.2 mm with intermediate annealing at 750 ° C x 10.

Samples 200 x 0.2 mm for measuring the Magnetostriction and the yield point established.

The measurement of # is carried out according to that described in Example 1 Method.

The magnetostriction of the tested sample is -47 x x 10-6 and their yield strength 7 kp / mm².

Example 9.

an alloy, which 96.85 wt.% Ni, 0.1 wt.% Cu, 2.0 wt.% Mn, Containing 1.0 wt.% Cr and 0.05 wt.% Nb is placed in an induction furnace in a magnesite crucible melted under vacuum. Cathode nickel and copper are used as feedstock in the Abandoned crucible and melted, after which the metal is deoxidized. One gives Weigh in manganese, chromium and niobium and then pour the material into a cast iron mold.

Jer 110 m: n thick ingot is made on a hot rolling mill at a temperature rolled down from 1100 ° C to a thickness of 12 mm, milled and on cold rolling machines rolled to a thickness of 0.2 mm with intermediate annealing at 750 ° C.

The tape produced becomes samples 200 x 10 x 0.2 mm around it the magnetostriction and the yield point cut out.

The # -value is according to the method described in example 1 measured.

The magnetostriction of the tested sample amounts to -44 x 10-6 and their yield strength to 10.0 kp / mm².

Claims (1)

PATENT CLAIM: Nickel-based alloy in which manganese, Copper and at least one of the elements: titanium, vanadium, molybdenum, chromium, tungsten, Niobium, tantalum are included, d u r ¢ h e k e n n n z e i c h n e t that the mentioned ingredients are proportionally contained in the following amounts: 0.05 to 6.5% by weight Mn 0.01 to 6% by weight Cu 0.01 to 5% by weight of at least one of the elements: Ti, V, Mo, Cr, W, Nb, Ta balance Ni.