CN105671251A - Heat treatment process for high-speed steel - Google Patents
Heat treatment process for high-speed steel Download PDFInfo
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- CN105671251A CN105671251A CN201410661898.7A CN201410661898A CN105671251A CN 105671251 A CN105671251 A CN 105671251A CN 201410661898 A CN201410661898 A CN 201410661898A CN 105671251 A CN105671251 A CN 105671251A
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Abstract
The invention discloses a heat treatment process for high-speed steel. The material is W6Mo5Cr4V2. The heat treatment process comprises the following steps that 1, a drilling bit is installed on a work fixture, and then pre-heating is conducted twice; and 2, step quenching and isothermal quenching are conducted. According to the heat treatment process for the high-speed steel, through two-time pre-heating, the tendencies of drilling bit oxidation and decarburization are relieved, the temperature difference is decreased, and deformation of the drilling bit is reduced advantageously; through step quenching, the drilling bit temperature difference can be reduced, the heat stress is lowered, and the distortion tendency is reduced; and through isothermal quenching, a retained austenite is advantageously converted into a lower bainite, the fragility of the drilling bit is reduced, the toughness of the drilling bit is improved, and the cracking tendencies of the drilling bit are reduced.
Description
Technical field
The invention belongs to Technology for Heating Processing field, specifically a kind of high-speed steel Technology for Heating Processing.
Background technology
Current drill bit material is mainly high-speed steel and hard alloy, both alloy rigidities are high, wear-resisting, red hardness is good, and keep certain toughness, but electric drill is in use, often occur fractureing, blade is easy to wear or buckling phenomenon, drill bit it is frequently necessary to change, and is primarily due to the performances such as the hardness of drill bit material, wearability, toughness and can not reach balance. Ensure that itself drilling and wearability, owing to the performance of instrument is served conclusive effect by the Technology for Heating Processing of material, therefore the Technology for Heating Processing of high-speed steel drill is to ensure that the key of intensity and wearability, also it is difficult point, its difficult point includes following several respects: high-speed steel drill is slender rod type cutter, very easily produces flexural deformation in heat treatment process; The hardness requirement of wayward blade and shank in heat treatment process; After high-temperature heating, cooling procedure skill ftractures, and above-mentioned Railway Project has had a strong impact on the quality of high-speed steel drill.
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of high-speed steel Technology for Heating Processing, the problem that can effectively solve the problem that bending that high-speed steel drill produces in prior heat treatment process, deformation, it is ensured that the quality of high-speed steel drill.
The technical scheme realizing the object of the invention is as follows:
A kind of high-speed steel Technology for Heating Processing, it is characterised in that material is W6Mo5Cr4V2, and its Technology for Heating Processing comprises the steps of
(1) drill bit being loaded frock clamp, then perform twice at preheating: first time low-temperature prewarming to 610-620 DEG C, heat time heating time first time presses effective radius 0.8-1h/100mm and calculates; In second time, temperature is preheating to 860-880 DEG C, and second time presses effective radius 1-1.2h/100mm calculating heat time heating time;
(2) adopt progressive austempering: put into by the drill bit after high-temperature heating in the calcium salt stove of 560-580 DEG C, stop 3-5min, place in 270-290 DEG C of nitrate furnace, keep the 30-50min time, further take out air cooling, rate of cooling 60-80 DEG C/h.
A kind of high-speed steel Technology for Heating Processing of the present invention, twice preheating, extend heat time heating time, before Quench heating, by classification the pre-heat treatment, shorten high-temperature holding time, slow down the trend of drill bit oxidation, decarburization, and reduce the temperature difference, advantageously reduce drill bit deformation, classified quenching, the drill bit temperature difference can be made to reduce, thermal stress reduces, and reduces distortion tendency, isothermal hardening, Transformation of Retained Austenite is conducive to become lower bainite, reduce the fragility of drill bit, improve the toughness of drill bit, decrease drill bit tearing tendency.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of high-speed steel Technology for Heating Processing, material is W6Mo5Cr4V2, and its Technology for Heating Processing comprises the steps of
(1) drill bit being loaded frock clamp, then perform twice at preheating: first time low-temperature prewarming to 610-620 DEG C, heat time heating time first time presses effective radius 0.8-1h/100mm and calculates;In second time, temperature is preheating to 860-880 DEG C, and second time presses effective radius 1-1.2h/100mm calculating heat time heating time;
(2) adopt progressive austempering: put into by the drill bit after high-temperature heating in the calcium salt stove of 560-580 DEG C, stop 3-5min, place in 270-290 DEG C of nitrate furnace, keep the 30-50min time, further take out air cooling, rate of cooling 60-80 DEG C/h.
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 high-speed steel Technology for Heating Processing, material is W6Mo5Cr4V2, and its Technology for Heating Processing comprises the steps of
(1) drill bit being loaded frock clamp, then perform twice at preheating: first time low-temperature prewarming to 610-620 DEG C, heat time heating time first time presses effective radius 0.8-1h/100mm and calculates; In second time, temperature is preheating to 860-880 DEG C, and second time presses effective radius 1-1.2h/100mm calculating heat time heating time;
(2) adopt progressive austempering: put into by the drill bit after high-temperature heating in the calcium salt stove of 560-580 DEG C, stop 3-5min, place in 270-290 DEG C of nitrate furnace, keep the 30-50min time, further take out air cooling, rate of cooling 60-80 DEG C/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661898.7A CN105671251A (en) | 2014-11-19 | 2014-11-19 | Heat treatment process for high-speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661898.7A CN105671251A (en) | 2014-11-19 | 2014-11-19 | Heat treatment process for high-speed steel |
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| Publication Number | Publication Date |
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| CN105671251A true CN105671251A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410661898.7A Pending CN105671251A (en) | 2014-11-19 | 2014-11-19 | Heat treatment process for high-speed steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886734A (en) * | 2016-06-24 | 2016-08-24 | 相城区黄桥荣翔金属制品厂 | Low-temperature preheating heat treatment process for hardware |
| CN107243635A (en) * | 2017-06-07 | 2017-10-13 | 湖北汽车工业学院 | A kind of quenching integrated technique of powder metallurgy abrasion-resistant stee melting infiltration sintering |
| CN107962362A (en) * | 2017-11-23 | 2018-04-27 | 重庆派斯克刀具制造股份有限公司 | A kind of method for improving planing tool cutter hub intensity |
| CN108118122A (en) * | 2017-12-01 | 2018-06-05 | 信秀塔克机械（苏州）有限公司 | A kind of technique for improving deep hole tools production and processing |
| CN109927322A (en) * | 2019-04-19 | 2019-06-25 | 浙江天台祥和实业股份有限公司 | A kind of nylon part water suction modulating equipment |
-
2014
- 2014-11-19 CN CN201410661898.7A patent/CN105671251A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886734A (en) * | 2016-06-24 | 2016-08-24 | 相城区黄桥荣翔金属制品厂 | Low-temperature preheating heat treatment process for hardware |
| CN107243635A (en) * | 2017-06-07 | 2017-10-13 | 湖北汽车工业学院 | A kind of quenching integrated technique of powder metallurgy abrasion-resistant stee melting infiltration sintering |
| CN107243635B (en) * | 2017-06-07 | 2020-04-03 | 湖北汽车工业学院 | Powder metallurgy wear-resistant steel infiltration sintering quenching integrated process |
| CN107962362A (en) * | 2017-11-23 | 2018-04-27 | 重庆派斯克刀具制造股份有限公司 | A kind of method for improving planing tool cutter hub intensity |
| CN108118122A (en) * | 2017-12-01 | 2018-06-05 | 信秀塔克机械（苏州）有限公司 | A kind of technique for improving deep hole tools production and processing |
| CN109927322A (en) * | 2019-04-19 | 2019-06-25 | 浙江天台祥和实业股份有限公司 | A kind of nylon part water suction modulating equipment |
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Application publication date: 20160615 |