CN101818234A - Quenching process of H13 steel for compression molds - Google Patents
Quenching process of H13 steel for compression molds Download PDFInfo
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- CN101818234A CN101818234A CN201010156013.XA CN201010156013A CN101818234A CN 101818234 A CN101818234 A CN 101818234A CN 201010156013 A CN201010156013 A CN 201010156013A CN 101818234 A CN101818234 A CN 101818234A
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Abstract
The invention discloses a quenching process of H13 steel for compression molds. The process comprises the following steps: multi-stage heating, N2 cooling and oil cooling. The invention changes the quenching cooling medium of a processed element while the steady temperature zone of the material quenched structure changes, i.e. the processed element is transferred from a vacuum high-pressure air quenching furnace to a quenching oil furnace to be cooled. The characteristic of high cooling speed of the quenching oil furnace can be utilized, so that the cooling curve quickly bypasses the bainite structure transition zone and enters the martensitic structure transition zone; and thus, the microstructure of the processed element can be transformed into martensite as much as possible so as to reduce or avoid carbides, bainite and residual austenite precipitating along the grain boundary, thereby enhancing the comprehensive mechanical properties of the processed element and enhancing the operation reliability of the mold. The invention is especially suitable for quenching large and complicated workpieces, and can ensures the quenching quality of the workpieces on the premise of no cracking.
Description
Technical field
The present invention relates to a kind of H13 class Heat Treatment Of Steel technology, particularly relate to the quenching technology of such steel grade.
Background technology
At present, transfer mold uses H13 class steel usually, and its quenching technology adopts the technology of vacuum high pressure gas quenching, and the workpiece of crossing through this art breading has surperficial non-oxidation decarburization, characteristics that workpiece deformation is little, basically can avoid hardening break, in industry so be widely adopted.Yet, this quenching technology also has huge shortcoming, show that low temperature in the quench cooled stage workpiece (about below 550 ℃) speed of cooling is on the low side, this means that workpiece is on the low side in bainite transformation district speed of cooling, quenching process occurs transfer mold easily and does not wish the bainite that occurs, if upper bainite, the work-ing life of mould will be had a strong impact on, because speed of cooling is low, and workpiece will keep certain residual austenite, cause the over-all properties of workpiece to reduce simultaneously.And the workpiece net thickness is thick more, and then its interior tissue is poor more, over-all properties is poor more.
Summary of the invention
For addressing the above problem, the invention provides a kind of quenching technology of H 13 steel for compression molds, it can effectively address the above problem, avoid handling in the part (workpiece) and bainite and residual austenite occur, can greatly improve the work-ing life and the over-all properties of mould, and bigger, the complex-shaped workpiece of very suitable thickness quenches.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of quenching technology of H 13 steel for compression molds may further comprise the steps:
A), the classification heating phase: will handle part and place high-pressure gas quenching furnace to carry out multiple fractionation heating and insulation;
B), N
2Cooling stages: in the high-pressure gas quenching furnace of handling part is housed, charge into N
2, will handling part, to be cooled to heart portion temperature be 590-620 ℃;
C), the oil cooling stage: the processing part of step b) gained is taken out from high-pressure gas quenching furnace, place the oil oven that quenching oil is housed, and be cooled to that to handle part heart portion temperature be 90-110 ℃, take out gained afterwards and handle part, change the tempering stove tempering over to.
If large complicated processing part, ftracture easily when too big with the heart portion temperature difference when the surface.Insulation is in order to reduce thermal stresses before oil cooling in the structural transformation stable region.Heat preservation method is controlled easily in vacuum oven simultaneously, and handling part can oxidation and decarbonization.Therefore,, the step of insulation can also be arranged after the described step b), make surface temperature and the heart portion temperature head of handling part be no more than 50 ℃, and this step be carried out in vacuum oven as further improvement in the technical proposal.
When workpiece immersed oil oven, in order to reduce the temperature difference between workpiece and the quenching oil, the oil oven of design should have heating and homothermic function, and size, complexity, the batch of the warm visual workpiece of oil are selected for use at 90-120 ℃.The quenching oil of selecting for use is adapted at this humidity province and uses.So both guarantee the quenching performance, lowered the cracking risk again.
As further improvement in the technical proposal, the described classification heating phase may further comprise the steps:
A), high-pressure gas quenching furnace being evacuated to the stove internal gas pressure is 0.8-1.0X10
-1Pa, after charge into the N of high-purity pressure at 10-1000Pa
2Protect; High-purity is to guarantee heat-eliminating medium N
2Middle oxygen level is unlikely to oxide treatment part and burner hearth, and general vacuum heat treatment all has the N of requirement more than 99.99%
2
B), with 5-10 ℃/min temperature rise rate heat temperature raising, when fire box temperature reaches 600-650 ℃, be incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface;
C), continue heat temperature raising, when fire box temperature reaches 800-850 ℃, be incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface with 5-8 ℃/min temperature rise rate;
D), continue heat temperature raising, when reaching 980-1050 ℃, fire box temperature is incubated, to handling part diathermanous follow-up continuation of insurance temperature 15-30 minute fully with 8-10 ℃/min temperature rise rate.
The invention has the beneficial effects as follows:
The inventive method will handle the part heating and high, middle thermophase cooling is carried out in high-pressure gas quenching furnace, make product have the non-oxidation decarburization of vacuum high pressure gas quenching surface and senior middle school's temperature speed of cooling advantage faster, owing to can monitor actual temperature by thermopair in the high-pressure gas quenching furnace, at any time carry out process corrections, when surface and the heart portion temperature difference are big, can carry out isothermal in the structural transformation stable region, the minimizing temperature difference simultaneously, thereby lower the probability that quenching crack produces, to a certain degree the controlled deformation amount.
And when the material quenching structure changes the equilibrium temperature district, handle the conversion of part quenching medium, be about to handle part and transfer to the cooling of quenching oil oven from the high-pressure gas quenching furnace cooling, then can utilize the fast characteristics of quenching oil oven speed of cooling to make cooling curve avoid the bainite structure limited proportionality fast, enter the martensitic stucture limited proportionality, make processing part microtexture change martensite as far as possible into, the carbide, bainite and the residual austenite that reduce or avoid separating out along crystal boundary, thereby improve the comprehensive mechanical performance of handling part, improve the reliability that mould uses.Be particularly suitable for relatively large and complicated workpiece and quench, under indehiscent situation, guarantee the quenching quality of workpiece.
Description of drawings
The present invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is a quenching technology curve synoptic diagram of the present invention.
Fig. 2 is that the gained workpiece surface was organized metallograph after vacuum high pressure gas quenching technology gained was organized final tempering in the prior art;
Fig. 3 is that the gained workpiece surface was organized metallograph after technology gained of the present invention was organized final tempering.
Embodiment
The quenching technology of a kind of H 13 steel for compression molds of the present invention may further comprise the steps:
A), the classification heating phase: will handle part and place high-pressure gas quenching furnace to carry out multiple fractionation heating and insulation;
B), N
2Cooling stages: in the high-pressure gas quenching furnace of handling part is housed, charge into N
2, will handling part, to be cooled to heart portion temperature be 590-620 ℃;
C), the oil cooling stage: the processing part of step b) gained is taken out from high-pressure gas quenching furnace, place the oil oven that quenching oil is housed, and be cooled to that to handle part heart portion temperature be 90-110 ℃, take out gained afterwards and handle part, change the tempering stove tempering over to.
Below in conjunction with Fig. 1 and specific embodiment the present invention is elaborated:
Embodiment 1
It is 0.8X10 that high-pressure gas quenching furnace is evacuated to the stove internal gas pressure
-1Pa, back charged pressure are the high-purity N of 100Pa
2Protect; With 5 ℃/min temperature rise rate heat temperature raising, when reaching 600 ℃, fire box temperature is incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface; Continuation continues heat temperature raising with 5 ℃/min temperature rise rate, is incubated when fire box temperature reaches 800 ℃, differs less than 50 ℃ with heart portion temperature up to handling the part surface; Then continue heat temperature raising, when fire box temperature reaches 980 ℃, be incubated, to handling the diathermanous fully follow-up continuation of insurance temperature of part 30 minutes with 10 ℃/min temperature rise rate.Charge into N2 in high-pressure gas quenching furnace, will handling part, to be cooled to heart portion temperature be 590 ℃; Then the processing part with gained takes out from high-pressure gas quenching furnace, places the oil oven that quenching oil is housed, and the quenching oil temperature is 105 ℃, and is cooled to that to handle part heart portion temperature be 90 ℃, takes out gained afterwards and handles part, changes the tempering stove tempering over to.
Embodiment 2
It is 1.0X10 that high-pressure gas quenching furnace is evacuated to the stove internal gas pressure
-1Pa, back charged pressure are the high-purity N of 1000Pa
2Protect; With 8 ℃/min temperature rise rate heat temperature raising, when reaching 650 ℃, fire box temperature is incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface; Continuation continues heat temperature raising with 8 ℃/min temperature rise rate, is incubated when fire box temperature reaches 850 ℃, differs less than 50 ℃ with heart portion temperature up to handling the part surface; Then continue heat temperature raising, when fire box temperature reaches 1050 ℃, be incubated, to handling the diathermanous fully follow-up continuation of insurance temperature of part 15 minutes with 8 ℃/min temperature rise rate.In high-pressure gas quenching furnace, charge into N
2, will handling part, to be cooled to heart portion temperature be 620 ℃, and be incubated in vacuum oven, makes surface temperature and the heart portion temperature head of handling part be no more than 50 ℃; Then will handle part and take out, place the oil oven that quenching oil is housed, and be cooled to that to handle part heart portion temperature be 110 ℃, and take out gained afterwards and handle part, change the tempering stove tempering over to from high-pressure gas quenching furnace.
Embodiment 3
It is 0.9X10 that high-pressure gas quenching furnace is evacuated to the stove internal gas pressure
-1Pa, after charge into the N that high-purity pressure is 10Pa
2Protect; With 6 ℃/min temperature rise rate heat temperature raising, when reaching 625 ℃, fire box temperature is incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface; Continuation continues heat temperature raising with 6 ℃/min temperature rise rate, is incubated when fire box temperature reaches 840 ℃, differs less than 50 ℃ with heart portion temperature up to handling the part surface; Then continue heat temperature raising, when fire box temperature reaches 1000 ℃, be incubated, to handling the diathermanous fully follow-up continuation of insurance temperature of part 20 minutes with 9 ℃/min temperature rise rate.In high-pressure gas quenching furnace, charge into N
2, will handling part, to be cooled to heart portion temperature be 600 ℃, then will handle part and take out from high-pressure gas quenching furnace, places the oil oven that quenching oil is housed, and be cooled to that to handle part heart portion temperature be 100 ℃, takes out gained afterwards and handle part, changes the tempering stove tempering over to.
What it should be noted that is, the classification heating phase can carry out repeatedly, and the present invention preferably adopts three classifications heating.
With reference to figure 2, the final workpiece surface tempered martensite of the resulting quenched martensite tissue of vacuum high pressure gas quenching technology in the prior art through obtaining after the tempering, can see, its tempered martensite is comparatively coarse, particle is bigger, more retained austenite tissue is contained in inside, and the transformation of tissue is very insufficient.With reference to figure 3, for quenching technology gained of the present invention is organized gained workpiece surface tempered martensite after the final tempering, can see, its structural transformation is abundant, and is evenly fine and smooth, rarely has the retained austenite tissue to exist, owing to tempered martensite is to be come by the quenched martensite structural transformation, hence one can see that, and the quenched martensite of quenching technology gained of the present invention is organized very abundant, do not have other miscellaneous tissues to exist.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (3)
1. the quenching technology of a H 13 steel for compression molds is characterized in that, may further comprise the steps:
A), the classification heating phase: will handle part and place high-pressure gas quenching furnace to carry out multiple fractionation heating and insulation;
B), N
2Cooling stages: in the high-pressure gas quenching furnace of handling part is housed, charge into N
2, will handling part, to be cooled to heart portion temperature be 590-620 ℃;
C), the oil cooling stage: the processing part of step b) gained is taken out from high-pressure gas quenching furnace, place the oil oven that quenching oil is housed, and be cooled to that to handle part heart portion temperature be 90-110 ℃, take out gained afterwards and handle part, change the tempering stove tempering over to.
2. the quenching technology of H 13 steel for compression molds according to claim 1, its feature in: also have the step of insulation after the described step b), make surface temperature and the heart portion temperature head of handling part be no more than 50 ℃.
3. the quenching technology of H 13 steel for compression molds according to claim 1, its feature in: the described classification heating phase may further comprise the steps:
A), high-pressure gas quenching furnace being evacuated to the stove internal gas pressure is 0.8-1.0X10
-1Pa, back charged pressure is at the N of 10-1000Pa
2Protect;
B), with 5-10 ℃/min temperature rise rate heat temperature raising, when fire box temperature reaches 600-650 ℃, be incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface;
C), continue heat temperature raising, when fire box temperature reaches 800-850 ℃, be incubated, differ less than 50 ℃ with heart portion temperature up to handling the part surface with 5-8 ℃/min temperature rise rate;
D), continue heat temperature raising, when reaching 980-1050 ℃, fire box temperature is incubated, to handling part diathermanous follow-up continuation of insurance temperature 15-30 minute fully with 8-10 ℃/min temperature rise rate.
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|---|---|---|---|
| CN201010156013XA CN101818234B (en) | 2010-04-20 | 2010-04-20 | Quenching process of H13 steel for compression molds |
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|---|---|---|---|
| CN201010156013XA CN101818234B (en) | 2010-04-20 | 2010-04-20 | Quenching process of H13 steel for compression molds |
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| CN101818234B CN101818234B (en) | 2011-07-13 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191427A (en) * | 2011-04-08 | 2011-09-21 | 嵊州市元丰模具材料有限公司 | Optimized method and process for applying hotwork die steel onto aluminum hub die |
| CN103114182A (en) * | 2011-11-16 | 2013-05-22 | 大亚科技股份有限公司 | Sprue bush heat treatment technology and sprue bush |
| CN103255269A (en) * | 2013-04-02 | 2013-08-21 | 广州市型腔模具制造有限公司 | Quench cooling process for H13 steel |
| CN103352110A (en) * | 2013-06-19 | 2013-10-16 | 长沙天和钻具机械有限公司 | Processing technology of medium-wind-pressure percussion bit |
| CN103352108A (en) * | 2013-06-24 | 2013-10-16 | 米云霞 | H13 molten steel cold and hot treatment process |
| CN103484610A (en) * | 2013-09-23 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for H13 steel |
| CN105112634A (en) * | 2015-09-23 | 2015-12-02 | 宁波兴波机械有限公司 | Heat treatment process for hot-working die |
| CN106119475A (en) * | 2016-08-30 | 2016-11-16 | 芜湖三联锻造有限公司 | A kind of large-scale high alloy mould special thermal treatment technique |
| CN109128734A (en) * | 2018-10-15 | 2019-01-04 | 苏州金瑞阳模具有限公司 | A kind of processing method of OEM aluminum-alloy wheel casting mould bed die |
| CN109517964A (en) * | 2018-12-28 | 2019-03-26 | 宁波合力模具科技股份有限公司 | A kind of mold vacuum heat treatment anti-deformation method |
| CN112609047A (en) * | 2020-12-02 | 2021-04-06 | 广东添富镁热处理有限公司 | Negative pressure heat treatment method |
| CN114442701A (en) * | 2022-01-12 | 2022-05-06 | 湖北三江航天江北机械工程有限公司 | Method for controlling actual temperature rise curve of product based on temperature control system |
| CN114854949A (en) * | 2022-03-15 | 2022-08-05 | 北京首航科学技术开发有限公司 | Vacuum heat treatment method for carbon steel workpiece |
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| CN1904086A (en) * | 2006-08-03 | 2007-01-31 | 上海交通大学 | Method of improving steel object surface hardness using carbon distribution |
| CN1908202A (en) * | 2006-08-17 | 2007-02-07 | 上海嘉仕久企业发展有限公司 | Soaking heat treatment technique for automobile steering knuckle after forging |
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| CN1710227A (en) * | 2005-07-04 | 2005-12-21 | 上海市机械制造工艺研究所 | Method for manufacturing lock shaft parts for container |
| CN1904086A (en) * | 2006-08-03 | 2007-01-31 | 上海交通大学 | Method of improving steel object surface hardness using carbon distribution |
| CN1908202A (en) * | 2006-08-17 | 2007-02-07 | 上海嘉仕久企业发展有限公司 | Soaking heat treatment technique for automobile steering knuckle after forging |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191427B (en) * | 2011-04-08 | 2013-10-02 | 嵊州市元丰模具材料有限公司 | Optimized method and process for applying hotwork die steel onto aluminum hub die |
| CN102191427A (en) * | 2011-04-08 | 2011-09-21 | 嵊州市元丰模具材料有限公司 | Optimized method and process for applying hotwork die steel onto aluminum hub die |
| CN103114182A (en) * | 2011-11-16 | 2013-05-22 | 大亚科技股份有限公司 | Sprue bush heat treatment technology and sprue bush |
| CN103255269B (en) * | 2013-04-02 | 2014-07-09 | 广州市型腔模具制造有限公司 | Quench cooling process for H13 steel |
| CN103255269A (en) * | 2013-04-02 | 2013-08-21 | 广州市型腔模具制造有限公司 | Quench cooling process for H13 steel |
| CN103352110B (en) * | 2013-06-19 | 2014-08-27 | 长沙天和钻具机械有限公司 | Processing technology of medium-wind-pressure percussion bit |
| CN103352110A (en) * | 2013-06-19 | 2013-10-16 | 长沙天和钻具机械有限公司 | Processing technology of medium-wind-pressure percussion bit |
| CN103352108A (en) * | 2013-06-24 | 2013-10-16 | 米云霞 | H13 molten steel cold and hot treatment process |
| CN103484610A (en) * | 2013-09-23 | 2014-01-01 | 无锡阳工机械制造有限公司 | Quenching method for H13 steel |
| CN103484610B (en) * | 2013-09-23 | 2015-09-30 | 无锡阳工机械制造有限公司 | A kind of quenching method of H13 class steel |
| CN105112634A (en) * | 2015-09-23 | 2015-12-02 | 宁波兴波机械有限公司 | Heat treatment process for hot-working die |
| CN106119475A (en) * | 2016-08-30 | 2016-11-16 | 芜湖三联锻造有限公司 | A kind of large-scale high alloy mould special thermal treatment technique |
| CN109128734A (en) * | 2018-10-15 | 2019-01-04 | 苏州金瑞阳模具有限公司 | A kind of processing method of OEM aluminum-alloy wheel casting mould bed die |
| CN109517964A (en) * | 2018-12-28 | 2019-03-26 | 宁波合力模具科技股份有限公司 | A kind of mold vacuum heat treatment anti-deformation method |
| CN112609047A (en) * | 2020-12-02 | 2021-04-06 | 广东添富镁热处理有限公司 | Negative pressure heat treatment method |
| CN114442701A (en) * | 2022-01-12 | 2022-05-06 | 湖北三江航天江北机械工程有限公司 | Method for controlling actual temperature rise curve of product based on temperature control system |
| CN114854949A (en) * | 2022-03-15 | 2022-08-05 | 北京首航科学技术开发有限公司 | Vacuum heat treatment method for carbon steel workpiece |
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Denomination of invention: Quenching process of H13 steel for die casting die Effective date of registration: 20210818 Granted publication date: 20110713 Pledgee: Dongshan Branch of Guangzhou Bank Co.,Ltd. Pledgor: GUANGZHOU DIE AND MOULD MANUFACTURING Co.,Ltd. Registration number: Y2021440000267 |
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Date of cancellation: 20220902 Granted publication date: 20110713 Pledgee: Dongshan Branch of Guangzhou Bank Co.,Ltd. Pledgor: GUANGZHOU DIE AND MOULD MANUFACTURING Co.,Ltd. Registration number: Y2021440000267 |