CN109628714A - A kind of heat treatment method improving low-alloy glazing steel yield strength - Google Patents
A kind of heat treatment method improving low-alloy glazing steel yield strength Download PDFInfo
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- CN109628714A CN109628714A CN201811547822.6A CN201811547822A CN109628714A CN 109628714 A CN109628714 A CN 109628714A CN 201811547822 A CN201811547822 A CN 201811547822A CN 109628714 A CN109628714 A CN 109628714A
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- Prior art keywords
- glazing
- steel
- heat treatment
- yield strength
- treatment method
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/001—Heat treatment of ferrous alloys containing Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D11/00—Continuous processes; Apparatus therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
本发明公开了一种提高低合金釉化用钢屈服强度的热处理方法，包括以下步骤：(1)将釉化用钢置于质量浓度为20～24％的酸液中清洗2～3分钟；(2)将酸洗后的釉化用钢表面均匀涂抹涂料；(3)将步骤(2)涂抹涂料的釉化用钢在不同温度下进行热处理，处理温度为815～870℃；(4)将热处理后的釉化用钢冷却至室温，冷却速度为1.0～1.5℃/s，经过热处理后，本发明釉化用钢的屈服强度达到440MPa，与轧制态的屈服强度相比明显提高。
The invention discloses a heat treatment method for improving the yield strength of low-alloy glazing steel, comprising the following steps: (1) placing the glazing steel in an acid solution with a mass concentration of 20-24% for cleaning for 2-3 minutes; (2) Evenly apply paint on the surface of the pickled steel for glazing; (3) Heat-treating the steel for glazing on which the paint is applied in step (2) at different temperatures, and the treatment temperature is 815-870°C; (4) The heat-treated steel for glazing is cooled to room temperature, and the cooling rate is 1.0-1.5° C./s. After the heat treatment, the yield strength of the steel for glazing of the present invention reaches 440 MPa, which is significantly improved compared with the yield strength of the rolled state.
Description
Technical field
The present invention relates to a kind of Heat-Treatment of Steel method, in particular to a kind of raising low-alloy glazing steel yield strength
Heat treatment method.
Background technique
Glazing is enamel to be coated in the surface of steel plate by different enamel production technologies (dry ward off is warded off with wet), then pass through with steel
Cross (800~900 DEG C) of high temperature fire after in conjunction with and a kind of composite material for being formed.For producing the glazing steel of water heater liner
It is general be lower than using phosphorus content 0.08% mild steel steel plate, chemical component, microstructure mechanical property are to the quality of enamel
It plays an important role.
Alloying element has highly important effect in glazing steel.Micro alloying element and carbon, nitrogen reciprocation generate
A series of effects such as refined crystalline strengthening, precipitation strength, make the glazing obtain excellent performance with steel.For example, manganese and phosphorus are strong
The intensity of steel plate can be improved in solid solution element.But manganese content excessively can intensity to steel plate and flexural property impact, phosphorus member
Element can excessively be such that the cold brittleness of steel plate increases, and toughness reduces.Copper, can be with simple substance form or analysis not in conjunction with carbonitride
Mutually it is present in steel matrix out.Copper can improve the intensity and toughness of steel, especially corrosion resistance, the disadvantage is that holding in hot-working
It is also easy to produce hot-short.Therefore, the content of strict control microalloy element is answered.
The microscopic structure of low-alloy glazing steel is mainly by ferrite, pearlite, cementite (Fe3C) and minute quantity is other
The composition such as carbon, nitrogen compound precipitated phase.To avoid generating enamel defect, ferrite grain size should be thin as far as possible in glazing steel
Small, pearlite should be evenly distributed and content is less.
The features such as glazing requires deep-draw good moldability, few surface defects, uniform plate thickness with steel also requires anti-squama quick-fried
Well, enamel adherence is good, sintering warpage is small etc..In the case where rolling state, the yield strength of glazing steel need to only meet basic mechanical
Can require, value do not need it is too high, in order to moulding, and after glazing sintering, it is desirable that its yield strength is high as far as possible, guarantees safety
Property.
Summary of the invention
Goal of the invention: the present invention provides a kind of heat treatment method for improving low-alloy glazing steel yield strength, by glaze
After changing sintering heat treatment, yield strength is significantly improved, and reaches 440MPa or more.
Technical solution: a kind of heat treatment method for improving low-alloy glazing steel yield strength of the present invention, including following step
It is rapid:
(1) glazing is placed in the acid solution that mass concentration is 20~24% with steel and is cleaned 2~3 minutes, pickling time cannot
It is too long, to avoid the Fe and sour overreaction in glazing steel；
(2) by the uniform daub of glazing steel surface after pickling；
(3) glazing of step (2) daub is heat-treated at different temperatures with steel, treatment temperature be 815~
870℃；
(4) glazing after heat treatment is cooled to room temperature with steel, cooling velocity is 1.0~1.5 DEG C/s.
Preferably, in step (1), the mass percentage of copper is 0.5~0.9% in the glazing steel.
Preferably, the glazing steel is composed of the following components: C:0.065~0.08%；Cu:0.5~0.9%；S :≤
0.01%；Mn:0.8~1.2%；P:0.05~0.09%；Si:0.4~0.6%；N:0.005~0.007%；Ni :≤
0.08%；Al:0.02~0.04%；Ti:0.008~0.020%, surplus are Fe and other inevitable impurity.
Preferably, in step (2), the coating is antioxidant coating, and coating is uniformly applied to surface of steel plate and will processing
Good steel plate suspension spontaneously dries in air, and the purpose that the present invention coats antioxidant coating is to prevent steel plate in heat treatment process
Middle generation decarburization.
Preferably, the coating is in glazing steel surface with a thickness of 0.16~0.2mm.
Preferably, in step (3), the heat treatment are as follows: at 815~820 DEG C, 5~10 minutes are kept the temperature, it is warming up to 840~
850 DEG C, 5~10min is kept the temperature, is warming up to 870~880 DEG C, keeps the temperature 5~10min.
Preferably, in step (1), the acid solution is hydrochloric acid solution.
The utility model has the advantages that the mechanical property of (1) glazing steel of the present invention rolls the yield strength of state up to comprehensive performance requirement
It is lower, be conducive to the molding of steel plate, then carry out glazing sintering, yield strength can be further enhanced, state is being rolled,
Its yield strength are as follows: Rp0.2>=390MPa, tensile strength Rm>=570MPa, elongation percentage >=32%；After heat treatment, it surrenders
Intensity are as follows: Rp0.2>=440MPa, tensile strength are as follows: Rm>=540MPa, elongation percentage >=32%；(2) glazing of the present invention steel rolling state
When ferrite grain boundaries at have the higher massive phase of C, Mn, Si content, by glazing sintering heat treatment after massive phase be changed into pearly-lustre
Body tissue, so that yield strength improves.
Detailed description of the invention
Microscopic structure when Fig. 1 is low-alloy glazing steel rolling state of the present invention；
Fig. 2 is the microscopic structure after the embodiment of the present invention 1 is heat-treated；
Fig. 3 is the load-deformation curve that the embodiment of the present invention 1 rolls the low-alloy glazing steel after state and heat treatment.
Specific embodiment
Below by way of specific embodiment, technical scheme is described further, but protection of the presently claimed invention
Range is not limited thereto.
One, raw material sources
Coating is No. 1 antioxidant coating of century of Huangyan, Zhejiang sapecial coating factory production；
Low-alloy glazing steel is by following mass percent at being grouped as: 0.08%C, 0.65%Cu, 0.0045%S,
1.19%Mn, 0.072%P, 0.51%Si, 0.006%N, 0.013%Ni, 0.03%Al, 0.01%Ti, surplus are Fe and its
Its inevitable impurity.
Two, sample preparation
Embodiment 1:
Step 1, low-alloy glazing is placed in the hydrochloric acid of concentration 20wt.% with steel and is cleaned 3 minutes, remove surface oxidation
Layer.
Step 2, coating is uniformly smeared to glazing steel surface after pickling, coating layer thickness 0.16mm, so that at heat
Glazing is heated evenly with each region of steel during reason；
Step 3, steel plate embedment is filled in the can of sand, places into chamber type electric resistance furnace and is heated to 815 DEG C, heat preservation 5
Minute, 843 DEG C are warming up to, keeps the temperature 5 minutes, is continuously heating to 871 DEG C, keeps the temperature 5 minutes；
Step 4, step 3 treated glazing is cooled to room temperature by the way of sand cooling with steel, the cooling speed of the process
Degree is about 1.0~1.5 DEG C/s.
Low-alloy glazing Jing Guo above-mentioned heat treatment is subjected to performance measurement with steel, as a result as follows:
Microscopic structure when Fig. 1 is 1 low-alloy glazing steel rolling state of the embodiment of the present invention, it will be seen from figure 1 that rolling
Under state processed, the microscopic structure of low-alloy glazing steel of the invention is mainly the massive phase of ferrite and grain boundaries.It can be with from Fig. 2
Find out, after Overheating Treatment, the massive phase on crystal boundary disappears, and pearlitic structrure occurs, compared to blocky phase constitution, is enriched in
C element in massive phase can be more fully diffused into ferrite matrix, therefore glazing is improved with steel yield strength.
From figure 3, it can be seen that in rolling state, low-alloy glazing steel yield strength of the present invention are as follows: Rp0.2>=390MPa, tensile strength are
Rm>=570MPa, elongation percentage >=32%；After heat treatment, yield strength are as follows: Rp0.2>=440MPa, tensile strength are as follows: Rm≥
540MPa, elongation percentage >=32%.Therefore, compared with rolling the yield strength under state, low-alloy glazing steel of the present invention through heat at
After reason, yield strength is significantly improved.It is lesser that the present invention solves the sintered glazing steel yield strength of prior art glazing
Defect, so that the yield strength of glazing steel is promoted to 440MPa or more from 350~410MPa.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
The obvious changes or variations that bright spirit is extended out are still in the protection scope of this invention.
Claims (7)
1. a kind of heat treatment method for improving low-alloy glazing steel yield strength, which comprises the following steps:
(1) glazing is placed in the acid solution that mass concentration is 20~24% with steel and is cleaned 2-3 minutes；
(2) by the uniform daub of glazing steel surface after pickling；
(3) glazing of step (2) daub is heat-treated at different temperatures with steel, treatment temperature is 815~870
℃；
(4) glazing after heat treatment is cooled to room temperature with steel, cooling velocity is 1.0~1.5 DEG C/s.
2. the heat treatment method according to claim 1 for improving low-alloy glazing steel yield strength, it is characterised in that step
Suddenly in (1), the mass percentage of copper is 0.5~0.9% in the glazing steel.
3. the heat treatment method according to claim 2 for improving low-alloy glazing steel yield strength, which is characterized in that institute
It is composed of the following components to state glazing steel: C:0.065~0.08%；Cu:0.5~0.9%；S :≤0.01%；Mn:0.8~
1.2%；P:0.05~0.09%；Si:0.4~0.6%；N:0.005~0.007%；Ni :≤0.08%；Al:0.02~
0.04%；Ti:0.008~0.020%, surplus are Fe and other inevitable impurity.
4. the heat treatment method according to claim 1 for improving low-alloy glazing steel yield strength, it is characterised in that step
Suddenly in (2), the coating is antioxidant coating.
5. the heat treatment method according to claim 4 for improving low-alloy glazing steel yield strength, which is characterized in that institute
Coating is stated in glazing steel surface with a thickness of 0.16~0.2mm.
6. the heat treatment method according to claim 1 for improving low-alloy glazing steel yield strength, it is characterised in that step
Suddenly in (3), the heat treatment method are as follows: at 815~820 DEG C, 5~10 minutes are kept the temperature, is warming up to 840~850 DEG C, heat preservation 5~
10min is warming up to 870~880 DEG C, keeps the temperature 5~10min.
7. the heat treatment method according to claim 1 for improving low-alloy glazing steel yield strength, it is characterised in that step
Suddenly in (1), the acid solution is hydrochloric acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547822.6A CN109628714A (en) | 2018-12-18 | 2018-12-18 | A kind of heat treatment method improving low-alloy glazing steel yield strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547822.6A CN109628714A (en) | 2018-12-18 | 2018-12-18 | A kind of heat treatment method improving low-alloy glazing steel yield strength |
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| CN109628714A true CN109628714A (en) | 2019-04-16 |
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| CN201811547822.6A Pending CN109628714A (en) | 2018-12-18 | 2018-12-18 | A kind of heat treatment method improving low-alloy glazing steel yield strength |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03126814A (en) * | 1989-10-09 | 1991-05-30 | Sumitomo Metal Ind Ltd | Production of high tensile steel sheet for porcelain enameling |
| CN101370952A (en) * | 2006-01-18 | 2009-02-18 | 新日本制铁株式会社 | Enamel processed products and enamel |
| CN101517115A (en) * | 2006-09-19 | 2009-08-26 | 新日本制铁株式会社 | Works for enameling and enameled products |
| CN107675100A (en) * | 2017-07-28 | 2018-02-09 | 东南大学 | A kind of high intensity glazing steel and its heat treatment method |
-
2018
- 2018-12-18 CN CN201811547822.6A patent/CN109628714A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03126814A (en) * | 1989-10-09 | 1991-05-30 | Sumitomo Metal Ind Ltd | Production of high tensile steel sheet for porcelain enameling |
| CN101370952A (en) * | 2006-01-18 | 2009-02-18 | 新日本制铁株式会社 | Enamel processed products and enamel |
| CN101517115A (en) * | 2006-09-19 | 2009-08-26 | 新日本制铁株式会社 | Works for enameling and enameled products |
| CN107675100A (en) * | 2017-07-28 | 2018-02-09 | 东南大学 | A kind of high intensity glazing steel and its heat treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 冯赛: "釉化用钢动态形变诱导相变显微组织的实验和模拟研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
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