CN104259799A - Turning tool processing technology beneficial to production efficiency and product quality - Google Patents
Turning tool processing technology beneficial to production efficiency and product quality Download PDFInfo
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- CN104259799A CN104259799A CN201410365780.XA CN201410365780A CN104259799A CN 104259799 A CN104259799 A CN 104259799A CN 201410365780 A CN201410365780 A CN 201410365780A CN 104259799 A CN104259799 A CN 104259799A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/30—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools lathes or like tools
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Abstract
The invention discloses a turning tool processing technology beneficial to production efficiency and product quality. The processing technology comprises the steps of blanking of workblank, forging, cutting machining, heat treatment and grinding machining which are sequentially carried out. The workblank is W2MoCr4V2Co8 high-speed tool steel; the heat treatment comprises the steps of preheating, heating and heat preservation, quenching and tempering which are sequentially carried out; grading gradual warming is adopted for the preheating; the tempering step is composed of a plurality of single tempering steps. Oil cooling is adopted for quenching; a cold treatment step follows the tempering procedure; pretreatment before cold treatment is performed between the cold treatment step and the tempering procedure; the cold treatment step is followed by water bath tempering. The technology is simple in route, the obtained turning tool hardness value is more than 72 HRC, and the amount of residual austenite is small. The technology guarantees good wear resistance, local metallographic phase evenness and thermal hardness, and the technology is beneficial to the turning tool machining efficiency and the product quality.
Description
Technical field
The present invention relates to for lathe tools process for machining and manufacturing field, particularly relate to a kind of lathe tool processing technology being beneficial to production efficiency and product quality.
Background technology
In mechanical processing industry, lathe is considered to the work " machine tool " of all devices.Lathe be mainly used in machining shaft, dish, cover and other there is the workpiece of rotary surface, based on cylinder, be use a widest class lathe in machine-building and repair factory, lathe tool is for turnery processing, the cutter with a cutting tip.Lathe tool is one of cutter most widely used in machining.
Along with the development of Modern Manufacturing Technology, high-speed steel bit is widely used in machining, in use procedure, the cutting tip of lathe tool will bear very large pressure, friction, impact under being operated in higher temperature, and this makes, and wearing and tearing more easily appear in high-speed steel bit, edge bends, lathe tool rotated strong and impacted the situation that breach etc. is unfavorable for crudy.How to optimize the lathe tool processing technology being beneficial to production efficiency and product quality of the prior art is further improve the key point of lathe tool quality further.
Summary of the invention
More easily occur that wearing and tearing, edge bends, lathe tool rotated the situation that strong and impact breach etc. are unfavorable for crudy for above-mentioned high-speed steel bit.How to optimize the problem that the lathe tool processing technology being beneficial to production efficiency and product quality of the prior art is the key point improving lathe tool quality further further, the invention provides a kind of lathe tool processing technology being beneficial to production efficiency and product quality.
For the problems referred to above, the lathe tool processing technology being beneficial to production efficiency and product quality provided by the invention reaches goal of the invention by following technical essential: the lathe tool processing technology being beneficial to production efficiency and product quality, comprise the blank blanking that order is carried out, forging, machining, heat treatment and grinding, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises the preheating that order is carried out, heating and thermal insulation, Quench and temper, described preheating adopts to heat up gradually stage by stage to be carried out, described preheating comprise the first stage be heated to 450-600 DEG C and insulation be no less than 20min, second stage is heated to 750-800 DEG C and insulation is no less than 20min, described heating and thermal insulation is heat blank further to 1210-1230 DEG C, and insulation is no less than 25min, described tempering step is made up of multiple single step tempering, the blank that each single step tempering is last step obtains is heated to 500-550 DEG C, insulation is no less than air cooling or oil cooling after 0.8h, and the cooling velocity of described air cooling and oil cooling is not more than 25 DEG C/s, described quenching is oil cooling, described tempering process is follow-up also comprises cold treatment step, pretreatment before cold treatment is also comprised between described cold treatment step and tempering process, cold treatment is follow-up also comprises water tempering, described cold treatment is the liquid nitrogen cold treatment that the blank obtained in the upper stage carries out-80 to-150 DEG C, before described cold treatment, pretreatment is that 90-100 DEG C of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach last operation obtained is no less than 1.5h.
Further technical scheme is:
Also comprise cleaning step between described machining and heat treatment, described cleaning step comprises deoil matting and the baking operation that order is carried out.
Described Quench and temper also comprises oil removing matting, drying process and the inspection operation that order is carried out.
Also annealing steps is comprised between described forging and machining.
The present invention has following beneficial effect:
Lathe tool heating process operation provided by the invention is simple, the preheating step carried out stage by stage before quenching by setting, effectively can reduce degree and the possibility of blank generation heat distortion, cracking in heat treatment process, simultaneously, compared to prior art blank at high operating temperatures the time of staying shorter, be conducive to the decarburized amount reducing blank, to ensure that the lathe tool obtained can keep enough hardness and wearability further.
By the tempering step that the multiple single step tempering arranged form, the retained austenite existed in rear blank that can realize having quenched constantly is decomposed and carbide dispersion sclerosis at the temperature of 500-550 DEG C, after repeatedly single step tempering blank metallographic structure in retained austenite body burden can greatly reduce, finally obtain the metallographic structure into tempered martensite, fine grained residual carbon compound and a small amount of retained austenite, like this, blank hardness number through the hardness obtained of quenching is brought up to 65-72HRC, be convenient to the hardness and the wearability that improve lathe tool, be beneficial to the service life of lathe tool.
The cold treatment arranged, before cold treatment in pretreatment and water tempering step, liquid nitrogen cold treatment is used for the martensitic transformation of retained austenite; Before cold treatment, pretreatment is for eliminating incomplete quench internal stress, tend towards stability to make retained austenite, the martensitic sharply expansion energy of retained austenite Absorbable rod stable like this, reduces the transformation stress of retained austenite formation of martensite, to reach the possibility reducing cold treatment embrittlement; The water tempering arranged is for eliminating most of cold treatment residual stress.More than arranging to make austenite maintenance dose in the lathe tool processed be 2-5%, and in lathe tool, internal stress is little, is convenient to the service life promoting lathe tool at double.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
Be beneficial to the lathe tool processing technology of production efficiency and product quality, comprise the blank blanking that order is carried out, forging, machining, heat treatment and grinding, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises the preheating that order is carried out, heating and thermal insulation, Quench and temper, described preheating adopts to heat up gradually stage by stage to be carried out, described preheating comprise the first stage be heated to 450-600 DEG C and insulation be no less than 20min, second stage is heated to 750-800 DEG C and insulation is no less than 20min, described heating and thermal insulation is heat blank further to 1210-1230 DEG C, and insulation is no less than 25min, described tempering step is made up of multiple single step tempering, the blank that each single step tempering is last step obtains is heated to 500-550 DEG C, insulation is no less than air cooling or oil cooling after 0.8h, and the cooling velocity of described air cooling and oil cooling is not more than 25 DEG C/s, described quenching is oil cooling, described tempering process is follow-up also comprises cold treatment step, pretreatment before cold treatment is also comprised between described cold treatment step and tempering process, cold treatment is follow-up also comprises water tempering, described cold treatment is the liquid nitrogen cold treatment that the blank obtained in the upper stage carries out-80 to-150 DEG C, before described cold treatment, pretreatment is that 90-100 DEG C of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach last operation obtained is no less than 1.5h.
Lathe tool heating process operation provided by the invention is simple, the preheating step carried out stage by stage before quenching by setting, effectively can reduce degree and the possibility of blank generation heat distortion, cracking in heat treatment process, simultaneously, compared to prior art blank at high operating temperatures the time of staying shorter, be conducive to the decarburized amount reducing blank, to ensure that the lathe tool obtained can keep enough hardness and wearability further.
By the tempering step that the multiple single step tempering arranged form, the retained austenite existed in rear blank that can realize having quenched constantly is decomposed and carbide dispersion sclerosis at the temperature of 500-550 DEG C, after repeatedly single step tempering blank metallographic structure in retained austenite body burden can greatly reduce, finally obtain the metallographic structure into tempered martensite, fine grained residual carbon compound and a small amount of retained austenite, like this, blank hardness number through the hardness obtained of quenching is brought up to 65-72HRC, be convenient to the hardness and the wearability that improve lathe tool, be beneficial to the service life of lathe tool.
The cold treatment arranged, before cold treatment in pretreatment and water tempering step, liquid nitrogen cold treatment is used for the martensitic transformation of retained austenite; Before cold treatment, pretreatment is for eliminating incomplete quench internal stress, tend towards stability to make retained austenite, the martensitic sharply expansion energy of retained austenite Absorbable rod stable like this, reduces the transformation stress of retained austenite formation of martensite, to reach the possibility reducing cold treatment embrittlement; The water tempering arranged is for eliminating most of cold treatment residual stress.More than arranging to make austenite maintenance dose in the lathe tool processed be 2-5%, and in lathe tool, internal stress is little, is convenient to the service life promoting lathe tool at double.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, for preventing the oil stain in mechanical processing process, blank is infected with, heat treatment is impacted, affect the final quality of product, also comprise cleaning step between described machining and heat treatment, described cleaning step comprises deoil matting and the baking operation that order is carried out.
Further described Quench and temper also comprises oil removing matting, drying process and the inspection operation that order is carried out.The inspection operation arranged is check the quenching quality of blank, as the crackle of outward appearance and thermal deformation, uniform quenching degree are observed, wastes operation resource to avoid the blank not meeting quality requirement to enter next step processing.
For ease of machining, between described forging and machining, also comprise annealing steps.
Above content is the further description done the present invention in conjunction with concrete preferred embodiment, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments drawn under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (4)
1. be beneficial to the lathe tool processing technology of production efficiency and product quality, comprise the blank blanking that order is carried out, forging, machining, heat treatment and grinding, it is characterized in that, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises the preheating that order is carried out, heating and thermal insulation, Quench and temper, described preheating adopts to heat up gradually stage by stage to be carried out, described preheating comprise the first stage be heated to 450-600 DEG C and insulation be no less than 20min, second stage is heated to 750-800 DEG C and insulation is no less than 20min, described heating and thermal insulation is heat blank further to 1210-1230 DEG C, and insulation is no less than 25min, described tempering step is made up of multiple single step tempering, the blank that each single step tempering is last step obtains is heated to 500-550 DEG C, insulation is no less than air cooling or oil cooling after 0.8h, and the cooling velocity of described air cooling and oil cooling is not more than 25 DEG C/s, described quenching is oil cooling, described tempering process is follow-up also comprises cold treatment step, pretreatment before cold treatment is also comprised between described cold treatment step and tempering process, cold treatment is follow-up also comprises water tempering, described cold treatment is the liquid nitrogen cold treatment that the blank obtained in the upper stage carries out-80 to-150 DEG C, before described cold treatment, pretreatment is that 90-100 DEG C of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach last operation obtained is no less than 1.5h.
2. the lathe tool processing technology being beneficial to production efficiency and product quality according to claim 1, is characterized in that, also comprise cleaning step between described machining and heat treatment, and described cleaning step comprises deoil matting and the baking operation that order is carried out.
3. the lathe tool processing technology being beneficial to production efficiency and product quality according to claim 1, is characterized in that, described Quench and temper also comprises oil removing matting, drying process and the inspection operation that order is carried out.
4. the lathe tool processing technology being beneficial to production efficiency and product quality according to claim 1, is characterized in that, also comprise annealing steps between described forging and machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410365780.XA CN104259799A (en) | 2014-07-30 | 2014-07-30 | Turning tool processing technology beneficial to production efficiency and product quality |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410365780.XA CN104259799A (en) | 2014-07-30 | 2014-07-30 | Turning tool processing technology beneficial to production efficiency and product quality |
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| CN104259799A true CN104259799A (en) | 2015-01-07 |
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| CN201410365780.XA Pending CN104259799A (en) | 2014-07-30 | 2014-07-30 | Turning tool processing technology beneficial to production efficiency and product quality |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058710A (en) * | 2017-04-10 | 2017-08-18 | 成都亨通兆业精密机械有限公司 | Reduce the drill produced technique of crystal defect |
| CN108406084A (en) * | 2018-02-08 | 2018-08-17 | 西安建筑科技大学 | A kind of stirring-head, friction stir weld device and the method for processing magnalium different alloys |
| CN112481472A (en) * | 2020-11-27 | 2021-03-12 | 上海天竺机械刀片有限公司 | Heat treatment process of alloy tool steel blade |
| CN114574670A (en) * | 2022-02-23 | 2022-06-03 | 江苏力星通用钢球股份有限公司 | Process for reducing heat treatment residual austenite of long-service-life precision cylindrical roller |
-
2014
- 2014-07-30 CN CN201410365780.XA patent/CN104259799A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058710A (en) * | 2017-04-10 | 2017-08-18 | 成都亨通兆业精密机械有限公司 | Reduce the drill produced technique of crystal defect |
| CN108406084A (en) * | 2018-02-08 | 2018-08-17 | 西安建筑科技大学 | A kind of stirring-head, friction stir weld device and the method for processing magnalium different alloys |
| CN108406084B (en) * | 2018-02-08 | 2021-12-14 | 西安建筑科技大学 | Stirring head, friction stir welding device and method for processing magnesium-aluminum dissimilar alloy |
| CN112481472A (en) * | 2020-11-27 | 2021-03-12 | 上海天竺机械刀片有限公司 | Heat treatment process of alloy tool steel blade |
| CN114574670A (en) * | 2022-02-23 | 2022-06-03 | 江苏力星通用钢球股份有限公司 | Process for reducing heat treatment residual austenite of long-service-life precision cylindrical roller |
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Application publication date: 20150107 |