CN102978517A - Cold working die steel and preparation method thereof - Google Patents
Cold working die steel and preparation method thereof Download PDFInfo
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- CN102978517A CN102978517A CN2012105450091A CN201210545009A CN102978517A CN 102978517 A CN102978517 A CN 102978517A CN 2012105450091 A CN2012105450091 A CN 2012105450091A CN 201210545009 A CN201210545009 A CN 201210545009A CN 102978517 A CN102978517 A CN 102978517A
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Abstract
The invention discloses a cold working die steel, which comprises the following components in percentage by weight: 1.12-1.32% of carbon, 0.25-0.50% of silicon, 0.20-0.50% of manganese, 11.0-13.0% of chrome, 1.20-1.60% of molybdenum, 2.00-2.60% of tungsten, 1.40-1.80% of vanadium, lower than 0.025% of phosphor, lower than 0.02% of sulfur and iron for the rest. The cold working die steel is good in durability, high in hardness, low in heat treatment deformation and long in service life, and is mainly used for manufacturing thread rolling dies, cold-extrusion punches and the like.
Description
Technical field
The invention belongs to field of alloy material, particularly a kind of cold-work die steel also relates to the preparation method of this die steel.
Background technology
The fundamental technology equipment of the Industrial products such as mould is machinery, electronics, automobile, communication, add some points.Have high efficiency and economy owing to utilize mould to carry out machine-shaping, the application of mould in materials processing moulding industry is very general.In the mould use procedure, its quality is subject to the impact of many factors, and such as shape design, processing quality, surface treatment situation, real work parameter etc., what wherein have the greatest impact is the used material of mould itself.
Alloy grinding tool steel can part be cold-work die steel, hot-work die steel and plastic die steel, and wherein cold-work die steel is mainly for the manufacture of at ambient temperature with the various moulds of metallic substance compression moulding.For cold mold material, wear resisting property, impelling strength, hardness are most important three performance parameter indexs.Yet, usually for same steel grade, it is best that its wear resisting property, impelling strength and hardness are difficult to reach simultaneously, often when reaching the best, hardness usually obtains the poorest impelling strength performance, and wear resisting property is subject to the impact of hardness and impelling strength simultaneously, and toughness properties then can guarantee stability and the security of wear process.
Most widely used cold working die steel material is mainly high carbon and chromium cold-work die steel Cr12, Cr12MoV etc. on the existing market, it has higher hardening capacity, hardenability, wear resistance, high-temperature oxidation resistance is good, therefore be widely used in making the cold-work die of various uses as universal cold working die steel material, such as complex-shaped punching concave die, cold extruding die, roll threading wheel, cold shears cutting knife and precision measuringtoll etc.Yet, this class cold-work die steel belongs to Ledeburitic steel, owing to contain the carbide forming elements such as a large amount of Cr, Mo, V in the steel, solidify with During Eutectoid Decomposition in can form a large amount of eutectic carbidess, cause the thermoplasticity of steel poor, surface crack 7 in forging the course of processing, occurs easily simultaneously, although can broken herring-bone form eutectic carbides through the forging deformation operation, but forged aspect effect, the distribution of carbides in the heavy in section steel remains inhomogeneous; The inhomogeneous mechanical property that reduces steel when serious of the large particle carbide that exists in the steel or distribution of carbides, and cause mould in heat treatment process, to occur the quality problems such as distortion, cracking, and with the increase of forging material size, the irregularity of eutectic carbides is more serious.
Summary of the invention
Goal of the invention: in order to address the above problem, the purpose of this invention is to provide that a kind of wear resistance is good, hardness is high, shock-resistance good, the cold-work die steel of long service life and preparation method thereof.
Technical scheme: the invention provides a kind of cold-work die steel, the component that comprises following weight percent: carbon 1.12-1.32%, silicon 0.25-0.50%, manganese 0.20-0.50%, chromium 11.0-13.0%, molybdenum 1.20-1.60%, tungsten 2.00-2.60%, vanadium 1.40-1.80%, phosphorus is below 0.025%, sulphur is below 0.02%, and all the other are iron.
A kind of preferred as cold-work die steel of the present invention, the component that comprises following weight percent: carbon 1.16-1.21%, silicon 0.25-0.40%, manganese 0.20-0.40%, chromium 11.0-12.0%, molybdenum 1.20-1.40%, tungsten 2.20-2.40%, vanadium 1.50-1.60%, phosphorus is below 0.025%, sulphur is below 0.02%, and all the other are iron.
Another kind as cold-work die steel of the present invention is preferred, and comprise the component of following weight percent: carbon 1.18%, silicon 0.30%, manganese 0.30%, chromium 11.5%, molybdenum 1.30%, tungsten 2.30%, vanadium 1.55%, phosphorus are below 0.02%, and sulphur is below 0.01%, and all the other are iron.
The present invention also provides a kind of preparation method of cold-work die steel, may further comprise the steps:
(1) iron, carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium are smelted 3-5h in 1500-1600 ℃, blowing argon gas stirs 1500-1600 ℃ of refining 1-2h, gets elementary molten steel;
(2) with elementary molten steel vacuum outgas 10-20min under 1500-1600 ℃ of 60-80Pa, get the high purity molten steel;
(3) the high purity molten steel is built under 1400-1500 ℃, 800-900 ℃ of annealing 8-12h leaves standstill after being cooled to 400-500 ℃ and is cooled to room temperature, gets electroslag bar;
(4) be (7-8) with the electroslag bar weight ratio: the mixture remelting of Fluorspar Powder (2-3) and aluminum oxide, remelting voltage 60-65V, electric current 10000-11000A gets steel ingot;
(5) with steel ingot in 800-900 ℃ of cycle annealing 14-18h, 1100-1200 ℃ of forging gets the forging material;
(6) will forge material 800-900 ℃ of annealing 10-14h, namely get cold-work die steel.
Beneficial effect: cold-work die steel wear resistance provided by the invention is good, hardness is high, shock-resistance good, heat treatment deformation is little, long service life.This cold-work die steel is applicable to make various high precision, long-life cold-work die, cutlery and measurer, such as thread rolling die, cold extrusion drift, complex-shaped punching concave die, cold extruding die, cylindrical die roll, thread rolling wheel, cold shears cutting knife and precision measuringtoll etc.
The preparation method preparation technology of cold-work die steel provided by the invention is simple, processing condition are easy to control, is suitable for suitability for industrialized production, can prepare that wear resistance is good, hardness is high, shock-resistance good, heat treatment deformation is little, the cold-work die steel of long service life.
Embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described concrete material proportion of embodiment, processing condition and result thereof only are used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Embodiment 1
Cold-work die steel, comprise the component of following weight percent: carbon 1.18%, silicon 0.30%, manganese 0.30%, chromium 11.5%, molybdenum 1.30%, tungsten 2.30%, vanadium 1.55%, phosphorus are below 0.02%, and sulphur is below 0.01%, and all the other are iron.
Its preparation method may further comprise the steps:
(1) iron, carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium are smelted 5h in 1500 ℃, blowing argon gas stirs 1600 ℃ of refining 1h, gets elementary molten steel;
(2) with elementary molten steel vacuum outgas 20min under 1500 ℃ of 80Pa, get the high purity molten steel;
(3) the high purity molten steel is built under 1400 ℃, 800 ℃ of annealing 8h leave standstill after being cooled to 400 ℃ and are cooled to room temperature, get electroslag bar;
(4) with the electroslag bar weight ratio be the mixture remelting of Fluorspar Powder and the aluminum oxide of 7:3, remelting voltage 65V, electric current 10000A gets steel ingot;
(5) with steel ingot in 800 ℃ of cycle annealing 14h, 1100 ℃ of forgings get the forging material;
(6) will forge 800 ℃ of annealing of material 14h, namely get cold-work die steel.
Embodiment 2
Cold-work die steel, comprise the component of following weight percent: carbon 1.12%, silicon 0.25%, manganese 0.50%, chromium 11.0%, molybdenum 1.20%, tungsten 2.00%, vanadium 1.40%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
(1) iron, carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium are smelted 3h in 1600 ℃, blowing argon gas stirs 1500 ℃ of refining 2h, gets elementary molten steel;
(2) with elementary molten steel vacuum outgas 10min under 1600 ℃ of 60Pa, get the high purity molten steel;
(3) the high purity molten steel is built under 1500 ℃, 900 ℃ of annealing 12h leave standstill after being cooled to 500 ℃ and are cooled to room temperature, get electroslag bar;
(4) with the electroslag bar weight ratio be the mixture remelting of Fluorspar Powder and the aluminum oxide of 8:2, remelting voltage 60V, electric current 11000A gets steel ingot;
(5) with steel ingot in 900 ℃ of cycle annealing 18h, 1200 ℃ of forgings get the forging material;
(6) will forge 900 ℃ of annealing of material 10h, namely get cold-work die steel.
Embodiment 3
Cold-work die steel, comprise the component of following weight percent: carbon 1.32%, silicon 0.50%, manganese 0.20%, chromium 13.0%, molybdenum 1.60%, tungsten 2.60%, vanadium 1.80%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
Its preparation method is with embodiment 1.
Embodiment 4
Cold-work die steel, comprise the component of following weight percent: carbon 1.21%, silicon 0.40%, manganese 0.40%, chromium 12.0%, molybdenum 1.20%, tungsten 2.40%, vanadium 1.60%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
Its preparation method is with embodiment 1.
Embodiment 5
Cold-work die steel, comprise the component of following weight percent: carbon 1.16%, silicon 0.25%, manganese 0.20%, chromium 11.0%, molybdenum 1.40%, tungsten 2.20%, vanadium 1.50%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
Its preparation method is with embodiment 1.
Embodiment 7
Cold-work die steel, comprise the component of following weight percent: carbon 1.19%, silicon 0.32%, manganese 0.27%, chromium 11.7%, molybdenum 1.29%, tungsten 2.28%, vanadium 1.56%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
Its preparation method is with embodiment 2.
Embodiment 8
Cold-work die steel, comprise the component of following weight percent: carbon 1.27%, silicon 0.41%, manganese 0.22%, chromium 12.5%, molybdenum 1.47%, tungsten 2.56%, vanadium 1.76%, phosphorus are below 0.025%, and sulphur is below 0.02%, and all the other are iron.
Its preparation method is with embodiment 2.
Embodiment 9
Measure the cold-work die steel performance of embodiment 1 to 8, the results are shown in Table 1, measuring method is as follows:
Measurement of hardness method: according to GB/T230.1;
The performance perameter of table 1 cold-work die steel
As seen from the above table, its hardness of cold-work die steel provided by the invention reaches more than the 62HRC, improves more than 30% than commercially available SKD11.By the hardness height as can be known, cold-work die steel wear resistance of the present invention is good.
Claims (4)
1. cold-work die steel, it is characterized in that: the component that comprises following weight percent: carbon 1.12-1.32%, silicon 0.25-0.50%, manganese 0.20-0.50%, chromium 11.0-13.0%, molybdenum 1.20-1.60%, tungsten 2.00-2.60%, vanadium 1.40-1.80%, phosphorus is below 0.025%, sulphur is below 0.02%, and all the other are iron.
2. a kind of cold-work die steel according to claim 1, it is characterized in that: the component that comprises following weight percent: carbon 1.16-1.21%, silicon 0.25-0.40%, manganese 0.20-0.40%, chromium 11.0-12.0%, molybdenum 1.20-1.40%, tungsten 2.20-2.40%, vanadium 1.50-1.60%, phosphorus is below 0.025%, sulphur is below 0.02%, and all the other are iron.
3. a kind of cold-work die steel according to claim 1, it is characterized in that: the component that comprises following weight percent: carbon 1.18%, silicon 0.30%, manganese 0.30%, chromium 11.5%, molybdenum 1.30%, tungsten 2.30%, vanadium 1.55%, phosphorus is below 0.02%, and sulphur is below 0.01%, and all the other are iron.
4. the preparation method of a cold-work die steel is characterized in that: may further comprise the steps:
(1) iron, carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium are smelted 3-5h in 1500-1600 ℃, blowing argon gas stirs 1500-1600 ℃ of refining 1-2h, gets elementary molten steel;
(2) with elementary molten steel vacuum outgas 10-20min under 1500-1600 ℃ of 60-80Pa, get the high purity molten steel;
(3) the high purity molten steel is built under 1400-1500 ℃, 800-900 ℃ of annealing 8-12h leaves standstill after being cooled to 400-500 ℃ and is cooled to room temperature, gets electroslag bar;
(4) be (7-8) with the electroslag bar weight ratio: the mixture remelting of Fluorspar Powder (2-3) and aluminum oxide, remelting voltage 60-65V, electric current 10000-11000A gets steel ingot;
(5) with steel ingot in 800-900 ℃ of cycle annealing 14-18h, 1100-1200 ℃ of forging gets the forging material;
(6) will forge material 800-900 ℃ of annealing 10-14h, namely get cold-work die steel.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667904A (en) * | 2013-11-27 | 2014-03-26 | 宁波臻至机械模具有限公司 | Automobile part casting die making technology |
| CN106148809A (en) * | 2016-06-29 | 2016-11-23 | 华北水利水电大学 | A kind of high-elongation mould steel and preparation method thereof |
| CN106148808A (en) * | 2016-06-29 | 2016-11-23 | 华北水利水电大学 | A kind of cold work die steel and preparation method thereof |
| CN107354305A (en) * | 2017-06-13 | 2017-11-17 | 中原特钢股份有限公司 | Improve the preparation method of Cr12 type mould steel the irregularity of eutectic carbides |
| CN107475606A (en) * | 2017-06-30 | 2017-12-15 | 太仓旺美模具有限公司 | A kind of corrosion-resistant cold work die steel |
| CN107523755A (en) * | 2017-06-30 | 2017-12-29 | 太仓旺美模具有限公司 | A kind of high toughness cold working die steel |
| CN112760573A (en) * | 2020-12-21 | 2021-05-07 | 秦治富 | Wear-resistant strip and production process thereof |
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| JP2002003988A (en) * | 2000-06-23 | 2002-01-09 | Daido Steel Co Ltd | Cold working tool steel having excellent machinability |
| JP2002012952A (en) * | 2000-06-29 | 2002-01-15 | Sanyo Special Steel Co Ltd | Tool steel for cold working |
| CN1811004A (en) * | 2005-01-14 | 2006-08-02 | 大同特殊钢株式会社 | Cold working die steel |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002003988A (en) * | 2000-06-23 | 2002-01-09 | Daido Steel Co Ltd | Cold working tool steel having excellent machinability |
| JP2002012952A (en) * | 2000-06-29 | 2002-01-15 | Sanyo Special Steel Co Ltd | Tool steel for cold working |
| CN1811004A (en) * | 2005-01-14 | 2006-08-02 | 大同特殊钢株式会社 | Cold working die steel |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667904A (en) * | 2013-11-27 | 2014-03-26 | 宁波臻至机械模具有限公司 | Automobile part casting die making technology |
| CN103667904B (en) * | 2013-11-27 | 2015-11-11 | 宁波臻至机械模具有限公司 | A kind of technique preparing automobile fitting die casting |
| CN106148809A (en) * | 2016-06-29 | 2016-11-23 | 华北水利水电大学 | A kind of high-elongation mould steel and preparation method thereof |
| CN106148808A (en) * | 2016-06-29 | 2016-11-23 | 华北水利水电大学 | A kind of cold work die steel and preparation method thereof |
| CN106148808B (en) * | 2016-06-29 | 2018-03-09 | 华北水利水电大学 | A kind of cold work die steel and preparation method thereof |
| CN107354305A (en) * | 2017-06-13 | 2017-11-17 | 中原特钢股份有限公司 | Improve the preparation method of Cr12 type mould steel the irregularity of eutectic carbides |
| CN107354305B (en) * | 2017-06-13 | 2019-01-22 | 河南中原特钢装备制造有限公司 | Improve the preparation method of Cr12 type mould steel the irregularity of eutectic carbides |
| CN107475606A (en) * | 2017-06-30 | 2017-12-15 | 太仓旺美模具有限公司 | A kind of corrosion-resistant cold work die steel |
| CN107523755A (en) * | 2017-06-30 | 2017-12-29 | 太仓旺美模具有限公司 | A kind of high toughness cold working die steel |
| CN112760573A (en) * | 2020-12-21 | 2021-05-07 | 秦治富 | Wear-resistant strip and production process thereof |
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| CN102978517B (en) | 2015-04-22 |
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Address after: 212312 Qianxiang Village, Houxiang Town, Danyang City, Zhenjiang City, Jiangsu Province Patentee after: Jiangsu Tiangong tools and new materials Co.,Ltd. Address before: 212321 Jiangsu Tiangong Tools Co., Ltd., HouXiang Town, Danyang City, Zhenjiang City, Jiangsu Province Patentee before: JIANGSU TIANGONG TOOLS Co.,Ltd. |
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