CN107739783A - A kind of heat treatment quenching process of high carbon and chromium tool steel - Google Patents
A kind of heat treatment quenching process of high carbon and chromium tool steel Download PDFInfo
- Publication number
- CN107739783A CN107739783A CN201711217522.7A CN201711217522A CN107739783A CN 107739783 A CN107739783 A CN 107739783A CN 201711217522 A CN201711217522 A CN 201711217522A CN 107739783 A CN107739783 A CN 107739783A
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- workpiece
- heat treatment
- stove
- high carbon
- quenching process
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
Abstract
The invention discloses a kind of heat treatment quenching process of high carbon and chromium tool steel, material is the high carbon and chromium ledeburite cold work tool steels of ASSAB XW 5 of Sweden's import, its major alloy composition is 2.05%C, 12.5%Cr, 1.3%W, 0.8%Mo and 0.3%Si, and the heat treatment quenching process comprises the following steps：(1) put the workpiece in glowing furnace and be preheated to 150 DEG C；(2) put the workpiece in glowing furnace and divide two-step heating to 965 DEG C of hardening heat and be incubated；(3) workpiece is come out of the stove into air-blast quenching to 70 DEG C；(4) workpiece is successively put into 280 DEG C of insulation tempering in tempering furnace, then air cooling of coming out of the stove twice.The present invention makes to be uniformly heated, to improve quenching degree using progressive solution, double tempering, and crystal grain refinement, uniform, reliable and stable can be allowed to, the service life and mechanical property of part are significantly improved, improves workpiece toughness and anti-impact force, reaches the requirement of precision component.
Description
【Technical field】
At the technical field of special steel material heat treatment, more particularly to a kind of heat of high carbon and chromium tool steel
Manage quenching technical.
【Background technology】
With the upgrading of China's manufacturing industry, requirement of some precision equipments to parts is more and more harsher, and home made materials exists
Some aspect of performances can not meet its requirement, have to using related advanced imported material, the particularly country such as Germany, Sweden
High purity steel, it has the fine qualities such as high purity, crystal grain refinement, even tissue, and import volume is constantly increasing in recent years, but
Heat treatment is horizontal incompatible therewith, it is difficult to plays its performance, causes huge waste, some supply producers have to set at home specially
The heat treatment service Factory of door, it is not only difficult to meet its personalized requirement, and cause cost greatly to rise.
ASSAB XW-5 are Sweden's trade mark, are a kind of high-carbon, high chromium ledeburite cold work die steel, and its major alloy composition is
2.05%C, 12.5%Cr, 1.3%W, 0.8%Mo and 0.3%Si, AISI D6, the GB standard steels of China similar to the U.S.
Number Cr12W；Its high purity, crystal grain refinement are uniform, have higher wearability, quenching degree, hardenability, obdurability, thermostabilization
Property, compression strength, Light deformation and high comprehensive performance and thermal oxidation resistance performance；Quenching distortion is small, and hardness is high, wear-resisting after heat treatment
Property it is good, larger shock loading can be born, commonly use hardness HRC58-HRC62；May be utilized in fabricating section it is big, it is complex-shaped, be subjected to
Impulsive force is big, requires the punch die edge of a knife part of the high cold-working mould of wearability.
Precision component ASSAB XW-5 cold work die steels, it is desirable to hardness is high, wearability is good, dimensionally stable, long lifespan, can
It is high by property, but high-carbon steel material poor thermal conductivity, alloy composition also have a great influence to Technology for Heating Processing, cause Technology for Heating Processing to be answered
It is miscellaneous, be such as heat-treated it is improper constantly be difficult to play its premium properties, quality is also difficult to control, and is easily scrapped in batches, it is also difficult to reliable
Ground ensures its quenching degree and accurately controls uniformity, the stability of material internal crystalline phase tissue, causes part in the course of work
Middle generation creep.
【The content of the invention】
In view of this, it is overcome the deficiencies in the prior art, the present invention provides a kind of high carbon and chromium instrument Heat-Treatment of Steel and quenched
Ignition technique, the quenching degree that reliably ensure that precision component and the uniformity, stably for being accurately controlled material internal crystalline phase tissue
Property, make good part wearability, long lifespan, reliability height, dimensionally stable, reach the requirement of precision component.
To achieve the above object, technical scheme is as follows：
A kind of heat treatment quenching process of high carbon and chromium tool steel, the heat treatment quenching process comprise the following steps：(1)
Put the workpiece in glowing furnace and be preheated to 150 DEG C；(2) workpiece is put into glowing furnace and divides two-step heating to hardening heat
965 DEG C and it is incubated；(3) workpiece is come out of the stove into air-blast quenching to 70 DEG C；(4) workpiece is successively put into tempering furnace twice
In 280 DEG C of insulation tempering, then air cooling of coming out of the stove.
Preferably, the step (1) is carried out in two steps, the wherein first step is with the heating speed less than 75 DEG C/h
Degree is heated to 100 DEG C, and second step is to be heated to 150 DEG C with the firing rate less than 115 DEG C/h.
Further, after the step (1) is completed, the workpiece of the preheating is continued to be heated to 820 DEG C and is incubated
50min, it is further continued for being heated to 965 DEG C of hardening heat and is incubated 37min, then carries out described step (3) and step successively
(4)。
Further, after the step (2) is completed, the workpiece is placed on support, air blower is opened, by the work
Part is air-cooled to 70 DEG C.
Further, after the step (3) is completed, the workpiece is put into tempering furnace and is heated to 280 DEG C of temperature simultaneously
It is incubated 120min, natural air cooling of coming out of the stove；The workpiece is put into tempering furnace again when the workpiece is air-cooled to 70 DEG C and heated
To 280 DEG C of temperature and 120min is incubated, then natural air cooling of coming out of the stove is to room temperature.
The beneficial effects of the invention are as follows：(1) can Precise control workpiece internal crystalline phase tissue, be allowed to crystal grain refinement,
It is even, stably, reliably, the service life and mechanical property of part, and Reducing distortion are significantly improved, eliminates creep, stable dimensions；
(2) present invention is simple to operate, practical, has higher industrial application value, can produce significantly social benefit and economy
Benefit.
【Brief description of the drawings】
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is technological process and the technological parameter figure of the present invention.
Wherein abscissa represents the time, and ordinate represents temperature, is specifically：Enter stove heat to 100 DEG C -150 DEG C -820
DEG C insulation 50min -965 DEG C insulation 37min-air-blast quenching of coming out of the stove is to 70 DEG C-enter for the first time stove be tempered 280 DEG C insulation
120min-come out of the stove is air-cooled to 70 DEG C-enter stove for the second time and be tempered 280 DEG C of insulation 120min-, and coming out of the stove is air-cooled to room temperature.
【Embodiment】
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Reference picture 1, illustrate so that average thickness is 24mm high carbon and chromium tool steel precision component as an example, its hardness requirement
For HRC59-62.
(1) workpiece that a collection of thickness is 24mm is put into glowing furnace and heated at twice, for the first time with less than 75 DEG C/h
Firing rate be heated to 100 DEG C, second is heated to 150 DEG C with the firing rate less than 115 DEG C/h.
(2) workpiece is heated to 820 DEG C in glowing furnace and is incubated 50min, is further continued for being heated to 965 DEG C of hardening heat and protects
Warm 37min；
(3) workpiece is come out of the stove and placed on support, air blower is opened, by workpiece air-blast quenching；
(4) when workpiece it is air-cooled to 70 DEG C when be immediately placed in tempering furnace and be heated to 280 DEG C and be tempered and be incubated 120min, come out of the stove
Natural air cooling；
(5) it is placed again into immediately in tempering furnace when workpiece is air-cooled to 70 DEG C and is heated to 280 DEG C and is tempered and is incubated 120min,
Natural air cooling come out of the stove to room temperature；
(6) workpiece hardness is surveyed sample with hardometer, its case hardness is HRC59-61, and splits workpiece polishing section,
With microexamination internal crystalline phase tissue.
Heat treatment quenching process of the present invention uses progressive solution, is uniformly heated workpiece；Using returning twice
Fire, quenching degree is improved, and is allowed to crystal grain refinement, uniform, reliable and stable, significantly improve the service life and mechanical property of part,
Workpiece toughness and anti-impact force are improved, its is simple and easy, has higher industrial application value, can produce significant social benefit
And economic benefit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (3)
- A kind of 1. heat treatment quenching process of high carbon and chromium tool steel, it is characterised in that the heat treatment quenching process include with Lower step：(1) put the workpiece in glowing furnace and be preheated to 150 DEG C；(2) workpiece is put into glowing furnace and divides two-step heating extremely 965 DEG C of hardening heat is simultaneously incubated；(3) workpiece is come out of the stove into air-blast quenching to 70 DEG C；(4) workpiece is successively put twice Enter 280 DEG C of insulation tempering in tempering furnace, then air cooling of coming out of the stove.
- 2. the heat treatment quenching process of a kind of high carbon and chromium tool steel according to claim 1, it is characterised in that complete After the step (1), the workpiece of the preheating is continued to be heated to 820 DEG C and is incubated 50min, is further continued for being heated to hardening heat 965 DEG C and 37min is incubated, then carries out described step (3) and step (4) successively.
- A kind of 3. heat treatment quenching process of high carbon and chromium tool steel according to claim 1 or 2, it is characterised in that After completing the step (3), the workpiece is put into tempering furnace and is heated to 280 DEG C of temperature and is incubated 120min, come out of the stove from Right air cooling；The workpiece is put into tempering furnace again when the workpiece is air-cooled to 70 DEG C and is heated to 280 DEG C of temperature simultaneously 120min is incubated, then natural air cooling of coming out of the stove is to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711217522.7A CN107739783A (en) | 2017-11-28 | 2017-11-28 | A kind of heat treatment quenching process of high carbon and chromium tool steel |
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| CN201711217522.7A CN107739783A (en) | 2017-11-28 | 2017-11-28 | A kind of heat treatment quenching process of high carbon and chromium tool steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774675A (en) * | 2018-07-04 | 2018-11-09 | 黄石高校智源技术咨询服务有限公司 | A kind of accurate heat treatment quenching process of high-carbon chromium tool steel precision component |
| CN111347220A (en) * | 2018-12-24 | 2020-06-30 | 溧阳市金昆锻压有限公司 | Manufacturing method of ledeburite steel high-wear-resistance press roll shell |
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| CN102367581A (en) * | 2011-10-21 | 2012-03-07 | 贵阳白云高原紧固件有限公司 | Multifunctional crown block breaking head |
| CN102703652A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Heat treatment process of hot-work-die steel for aluminum die-casting mould |
| CN103589839A (en) * | 2013-10-21 | 2014-02-19 | 航天精工股份有限公司 | Heat treatment technique of high-carbon high-chromium stainless steel |
| CN103667619A (en) * | 2013-12-16 | 2014-03-26 | 上海工程技术大学 | Subcritical quenching technology of Cr5MoV cold-work mold steel |
| CN105779896A (en) * | 2016-04-28 | 2016-07-20 | 太仓市沪太热处理厂 | Heating processing technology for high-carbon high-alloy cold work die steel |
| CN105861942A (en) * | 2016-05-13 | 2016-08-17 | 如皋市宏茂重型锻压有限公司 | Cold work die steel and preparation process thereof |
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2017
- 2017-11-28 CN CN201711217522.7A patent/CN107739783A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367581A (en) * | 2011-10-21 | 2012-03-07 | 贵阳白云高原紧固件有限公司 | Multifunctional crown block breaking head |
| CN102703652A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Heat treatment process of hot-work-die steel for aluminum die-casting mould |
| CN103589839A (en) * | 2013-10-21 | 2014-02-19 | 航天精工股份有限公司 | Heat treatment technique of high-carbon high-chromium stainless steel |
| CN103667619A (en) * | 2013-12-16 | 2014-03-26 | 上海工程技术大学 | Subcritical quenching technology of Cr5MoV cold-work mold steel |
| CN105779896A (en) * | 2016-04-28 | 2016-07-20 | 太仓市沪太热处理厂 | Heating processing technology for high-carbon high-alloy cold work die steel |
| CN105861942A (en) * | 2016-05-13 | 2016-08-17 | 如皋市宏茂重型锻压有限公司 | Cold work die steel and preparation process thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774675A (en) * | 2018-07-04 | 2018-11-09 | 黄石高校智源技术咨询服务有限公司 | A kind of accurate heat treatment quenching process of high-carbon chromium tool steel precision component |
| CN111347220A (en) * | 2018-12-24 | 2020-06-30 | 溧阳市金昆锻压有限公司 | Manufacturing method of ledeburite steel high-wear-resistance press roll shell |
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Application publication date: 20180227 |