CN104372351A - Heat treatment method for die-casting mould - Google Patents
Heat treatment method for die-casting mould Download PDFInfo
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- CN104372351A CN104372351A CN201410644116.9A CN201410644116A CN104372351A CN 104372351 A CN104372351 A CN 104372351A CN 201410644116 A CN201410644116 A CN 201410644116A CN 104372351 A CN104372351 A CN 104372351A
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- die
- casting mould
- treatment method
- heat treatment
- transfer mold
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Abstract
The invention discloses a heat treatment method for a die-casting mould. The heat treatment method for the die-casting mould comprises the following steps: (1) heating the die-casting mould to the temperature of 1,020-1,050 DEG C at the speed of 50-100 DEG C per hour, carrying out heat preservation for 20-50 minutes, and then, cooling at the speed of 150-200 DEG C per hour; (2) cooling the die-casting mould, treated in the step (1), to the temperature of -60 DEG C to -70 DEG C, and carrying out heat preservation for 2-3 minutes; (3) introducing a nitrogen source and a carbon source at the temperature of 550-600 DEG C, so as to carry out carburizing and nitriding treatment on the die-casting mould treated in the step (2), reacting for 3-8 hours, then, tapping and naturally cooling. According to the heat treatment method disclosed by the invention, the cracking of the carburized and nitrided die-casting mould during repeated die-casting can be obviously reduced; compared with the general methods, the heat treatment method has the advantage that the service life of the die-casting mould can be doubled or so.
Description
Technical field
The present invention relates to a kind of transfer mold, particularly H13 Heat Treatment Of Steel method.
Background technology
H13 steel is transfer mold steel most widely used at present, usually adopts carburizing, nitridation process to improve its surface hardness, but easily causes the decline of thermal crack resistant ability when thermal treatment, in press casting procedure repeatedly, easily occur be full of cracks.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of heat treating method of transfer mold.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A heat treating method for transfer mold, comprises the steps:
(1) transfer mold is risen to 1020-1050 DEG C with the speed of 50-100 DEG C/h, be incubated after 20-50 minute, cool with 150-200 DEG C/h speed;
(2) transfer mold after step (1) process is cooled to-60 ~-70 DEG C, insulation 2-3 minute;
(3) at 550-600 DEG C, pass into nitrogenous source and carbon source the process of carburizing nitrogen is carried out to the transfer mold after step (2) process, react after 3-8 hour, come out of the stove, naturally cooling.
The be full of cracks occurred in press casting procedure repeatedly after heat treating method of the present invention obviously can reduce transfer mold carburizing nitrogen, compared with general method, the present invention can improve transfer mold access times about 1 times.
Embodiment
Below in conjunction with preferred embodiment, the present invention will be described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1
The transfer mold of H13 steel is added in quenching furnance, nitrogen atmosphere, rise to 1020 DEG C with the heat-up rate of 100 DEG C/h with stove, be incubated 20 minutes, with the speed furnace cooling of 150 DEG C/h.
By cooled transfer mold deep cooling to-60 DEG C, be incubated after 3 minutes, naturally rise to room temperature.
Again transfer mold is put into vacuum oven, nitrogen atmosphere, be warmed up to 550 DEG C with stove, then pass into ammonia/methyl alcohol (volume ratio is 1:1), stop logical ammonia/methyl alcohol after 4 hours, furnace cooling.
embodiment 2
The transfer mold of H13 steel is added in quenching furnance, nitrogen atmosphere, rise to 1030 DEG C with the heat-up rate of 50 DEG C/h with stove, be incubated 50 minutes, with the speed furnace cooling of 200 DEG C/h.
By cooled transfer mold deep cooling to-70 DEG C, be incubated after 2 minutes, naturally rise to room temperature.
Again transfer mold is put into vacuum oven, nitrogen atmosphere, be warmed up to 600 DEG C with stove, then pass into ammonia/methyl alcohol (volume ratio is 1:2), stop logical ammonia/methyl alcohol after 4 hours, furnace cooling.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a heat treating method for transfer mold, comprises the steps:
(1) transfer mold is risen to 1020-1050 DEG C with the speed of 50-100 DEG C/h, be incubated after 20-50 minute, cool with 150-200 DEG C/h speed;
(2) transfer mold after step (1) process is cooled to-60 ~-70 DEG C, insulation 2-3 minute;
(3) at 550-600 DEG C, pass into nitrogenous source and carbon source the process of carburizing nitrogen is carried out to the transfer mold after step (2) process, react after 3-8 hour, come out of the stove, naturally cooling.
Priority Applications (1)
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CN201410644116.9A CN104372351A (en) | 2014-11-14 | 2014-11-14 | Heat treatment method for die-casting mould |
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CN201410644116.9A CN104372351A (en) | 2014-11-14 | 2014-11-14 | Heat treatment method for die-casting mould |
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CN104372351A true CN104372351A (en) | 2015-02-25 |
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CN201410644116.9A Pending CN104372351A (en) | 2014-11-14 | 2014-11-14 | Heat treatment method for die-casting mould |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107937698A (en) * | 2017-12-25 | 2018-04-20 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0251966B2 (en) * | 1986-05-28 | 1990-11-09 | Kobe Steel Ltd | |
CN102925903A (en) * | 2012-09-27 | 2013-02-13 | 厦门真冈热处理有限公司 | Heat treatment method for die-casting die |
-
2014
- 2014-11-14 CN CN201410644116.9A patent/CN104372351A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0251966B2 (en) * | 1986-05-28 | 1990-11-09 | Kobe Steel Ltd | |
CN102925903A (en) * | 2012-09-27 | 2013-02-13 | 厦门真冈热处理有限公司 | Heat treatment method for die-casting die |
Non-Patent Citations (3)
Title |
---|
王邦杰: "《实用模具材料与热处理速查手册》", 31 January 2014, 机械工业出版社 * |
谢绍志: "《热处理质量控制与检验实务全书》", 29 February 2004, 安徽音像出版社 * |
赵步青等: "《工具用钢热处理手册》", 31 March 2014, 机械工业出版社 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107937698A (en) * | 2017-12-25 | 2018-04-20 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
CN107937698B (en) * | 2017-12-25 | 2019-02-01 | 合肥南方汽车零部件有限公司 | A kind of heat treatment process of 45 steel molds of metal casting |
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Application publication date: 20150225 |