CN105734209A - Heat treatment process for high-speed steel - Google Patents
Heat treatment process for high-speed steel Download PDFInfo
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- CN105734209A CN105734209A CN201410744483.6A CN201410744483A CN105734209A CN 105734209 A CN105734209 A CN 105734209A CN 201410744483 A CN201410744483 A CN 201410744483A CN 105734209 A CN105734209 A CN 105734209A
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Abstract
The invention discloses a heat treatment process for high-speed steel. The material is W2Mo8Cr4V2Co8. The heat treatment process for the high-speed steel is characterized by comprising the following steps that (1) preheating treatment is carried out, specifically, the high-speed steel is preheated to 650 DEG C, heated to 840-860 DEG C, kept at the temperature for 0.3-0.5 h, cooled to 780 DEG C, cooled to 650 DEG C at the cooling speed of 25-30 DEG C/h, discharged out of a furnace and subjected to air cooling; and (2) finial heat treatment is carried out, specifically, the high-speed steel is cleaned, dried, preheated to 500-600 DEG C for the first time, preheated to 800-900 DEG C for the second time, heated to 1200-1220 DEG C, kept at the temperature for 2-5 h, subjected to oil quenching, cleaned, dried, subjected to tempering for the first time, subjected to tempering for the second time and subjected to tempering for the third time. According to the heat treatment process for the high-speed steel, the furnace temperature uniformity is good, the structure is uniform and stable, and the comprehensiveness of the high-speed steel is improved.
Description
Technical field
The invention belongs to Technology for Heating Processing field, specifically the Technology for Heating Processing of a kind of high-speed steel.
Background technology
Development along with China's mechanical industry, in machining, cutting speed and feed improve day by day, effect due to friction, the heat that unit interval produces also gets more and more, sometimes blade heating temperature reaches more than 600 DEG C, but also subjects cutting pressure, in this case, cutter is still to keep high hardness, intensity and wearability, it is necessary to require the improving constantly of combination property of shear steel material.High-speed steel tool is frequently encountered by the problem of strain cracking in heat treatment process, and cutter and elongated cutter distortion that larger in size, shape is more complicated are especially prominent, and the former is easy to crack, and the latter is yielding.There is various structural transformation in cutter, owing to the specific volume of tissue each in steel is different, therefore change in volume occurs when phase transformation in heating and cooling procedure.In prior art, the W2Mo8Cr4V2Co8 high-speed steel annealing process cycle is long, and furnace temperature is not easily uniform, and inconvenient operation, simultaneously for the mechanical performance of cutter, manufacturability has a strong impact on.
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides the Technology for Heating Processing of a kind of high-speed steel, can improve the structure stability of W2Mo8Cr4V2Co8 cutter at high speeds steel, improves the combination property such as wearability and toughness.
The technical scheme realizing the object of the invention is as follows:
The Technology for Heating Processing of a kind of high-speed steel, its material is W2Mo8Cr4V2Co8, it is characterised in that comprise the steps of
(1) conditioning treatment: preheat with 40-50 DEG C/h firing rate to 650 DEG C → be cooled to 25～30 DEG C/h of 780 DEG C → rate of cooling with the heating of 25～30 DEG C/h firing rate be cooled to 650 DEG C → air cooling of coming out of the stove to 840～860 DEG C → insulation 0.3-0.5h → 10～60 DEG C/h rate of cooling；
(2) finished heat treatment: clean → dry → first time preheating with 40-50 DEG C/h firing rate to 500～600 DEG C → second time preheating with 25-30 DEG C/h firing rate to 800～900 DEG C → with 12-20 DEG C/h firing rate heating to 1200～1220 DEG C → insulation 2-5h → oil quenching → cleaning → drying → first time temperature 530～550 DEG C → second time temperature 530～350 DEG C → third time temperature 180～350 DEG C.
A kind of Technology for Heating Processing of the high-speed steel of the present invention, temperature uniformity is good, even tissue is stable, high-speed tool steel use hardness after Overheating Treatment can reach 63HRC, and its toughness, wearability and thermostability are all better, the cutting speed of its high-speed steel tool increases 1-3 times than carbon tool steel and low-alloy tool steel, and ruggedness increases 7-14 times, improves the comprehensive of high-speed steel.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
The Technology for Heating Processing of a kind of high-speed steel, its material is W2Mo8Cr4V2Co8, it is characterised in that comprise the steps of
(1) conditioning treatment: preheat with 40-50 DEG C/h firing rate to 650 DEG C → be cooled to 25～30 DEG C/h of 780 DEG C → rate of cooling with the heating of 25～30 DEG C/h firing rate be cooled to 650 DEG C → air cooling of coming out of the stove to 840～860 DEG C → insulation 0.3-0.5h → 10～60 DEG C/h rate of cooling；
(2) finished heat treatment: clean → dry → first time preheating with 40-50 DEG C/h firing rate to 500～600 DEG C → second time preheating with 25-30 DEG C/h firing rate to 800～900 DEG C → with 12-20 DEG C/h firing rate heating to 1200～1220 DEG C → insulation 2-5h → oil quenching → cleaning → drying → first time temperature 530～550 DEG C → second time temperature 530～350 DEG C → third time temperature 180～350 DEG C.
A kind of Technology for Heating Processing of the high-speed steel of the present invention, temperature uniformity is good, even tissue is stable, high-speed tool steel use hardness after Overheating Treatment can reach 63HRC, and its toughness, wearability and thermostability are all better, the cutting speed of its high-speed steel tool increases 1-3 times than carbon tool steel and low-alloy tool steel, and ruggedness increases 7-14 times, improves the comprehensive of high-speed steel.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a Technology for Heating Processing for high-speed steel, its material is W2Mo8Cr4V2Co8, it is characterised in that comprise the steps of
(1) conditioning treatment: preheat with 40-50 DEG C/h firing rate to 650 DEG C → be cooled to 25～30 DEG C/h of 780 DEG C → rate of cooling with the heating of 25～30 DEG C/h firing rate be cooled to 650 DEG C → air cooling of coming out of the stove to 840～860 DEG C → insulation 0.3-0.5h → 10～60 DEG C/h rate of cooling；
(2) finished heat treatment: clean → dry → first time preheating with 40-50 DEG C/h firing rate to 500～600 DEG C → second time preheating with 25-30 DEG C/h firing rate to 800～900 DEG C → with 12-20 DEG C/h firing rate heating to 1200～1220 DEG C → insulation 2-5h → oil quenching → cleaning → drying → first time temperature 530～550 DEG C → second time temperature 530～350 DEG C → third time temperature 180～350 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744483.6A CN105734209A (en) | 2014-12-09 | 2014-12-09 | Heat treatment process for high-speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410744483.6A CN105734209A (en) | 2014-12-09 | 2014-12-09 | Heat treatment process for high-speed steel |
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| Publication Number | Publication Date |
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| CN105734209A true CN105734209A (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410744483.6A Pending CN105734209A (en) | 2014-12-09 | 2014-12-09 | Heat treatment process for high-speed steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074055A (en) * | 2019-12-23 | 2020-04-28 | 东台市宏凯不锈钢有限公司 | Heat treatment process of wear-resistant die steel turning tool |
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2014
- 2014-12-09 CN CN201410744483.6A patent/CN105734209A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074055A (en) * | 2019-12-23 | 2020-04-28 | 东台市宏凯不锈钢有限公司 | Heat treatment process of wear-resistant die steel turning tool |
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Application publication date: 20160706 |
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| WD01 | Invention patent application deemed withdrawn after publication |