CN104175083A - Turning tool manufacturing technology capable of reducing heat damage and facilitating processing - Google Patents
Turning tool manufacturing technology capable of reducing heat damage and facilitating processing Download PDFInfo
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- CN104175083A CN104175083A CN201410364991.1A CN201410364991A CN104175083A CN 104175083 A CN104175083 A CN 104175083A CN 201410364991 A CN201410364991 A CN 201410364991A CN 104175083 A CN104175083 A CN 104175083A
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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 manufacturing technology capable of reducing heat damage and facilitating processing. The turning tool manufacturing technology comprises steps of workblank blanking, forging, cutting processing, heat treatment and grinding which are performed sequentially, wherein the workblank adopts W2MoCr4V2Co8 high-speed tool steel; the heat treatment comprises steps of preheating, heating and heat insulation, quenching and tempering which are performed sequentially, the preheating is performed by gradually warming by stages, the heating and heat insulation step is that the workblank is further heated to 1,210-1,230 DEG C, and heat insulation is performed for not less than 25 min; and an annealing step is performed between the forging and the cutting processing and is that the forged workblank is heated step by step. The technology has a simple route and small heat damage to a turning tool, the hardness value of the obtained turning tool can be higher than 72 HRC, and the obtained turning tool has good wear resistance and red hardness as well as long service life.
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 manufacturing process that reduces fire damage and be beneficial to processing.
Background technology
In mechanical processing industry, lathe is considered to the work " machine tool " of all devices.Lathe is mainly used in machining shaft, dish, cover and other and has the workpiece of rotary surface, taking cylinder as main, is in machine-building and repair factory, to use a widest class lathe, lathe tool for turning processing, there is the cutter of 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, impacts and be operated at higher temperature, and this makes high-speed steel bit be prone to wearing and tearing, edge bends, lathe tool to rotate strong and impacted the situation that breach etc. is unfavorable for crudy.How further optimizing the fire damage that reduces of the prior art is further to improve the key point of lathe tool quality with the lathe tool manufacturing process that is beneficial to processing.
Summary of the invention
Being prone to wearing and tearing, edge bends, lathe tool for above-mentioned high-speed steel bit rotated strong and impacted the situation that breach etc. is unfavorable for crudy.How further optimizing the fire damage that reduces of the prior art is further to improve the problem of the key point of lathe tool quality with the lathe tool manufacturing process that is beneficial to processing, the invention provides a kind of lathe tool manufacturing process that reduces fire damage and be beneficial to processing.
For the problems referred to above, the fire damage that reduces provided by the invention reaches goal of the invention with the lathe tool manufacturing process that is beneficial to processing by following technical essential: can reduce fire damage and the lathe tool manufacturing process that is beneficial to processing, comprise blank blanking in sequence, forge, machining, heat treatment and grinding, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises preheating in sequence, heating and thermal insulation, quench and tempering, described pre-thermal recovery heats up and carries out gradually stage by stage, described preheating comprises that the first stage is heated to 450-600 DEG C and is also incubated and is no less than 20min, second stage is heated to 750-800 DEG C and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 DEG C, and insulation is no less than 25min, between described forging and machining, also comprise annealing steps, described annealing steps is the blank step heating that forging is obtained: be heated to 600-650 DEG C of insulation from normal temperature and be no less than 10min, continue to be heated to 850-860 DEG C of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 DEG C/h, described tempering step is made up of multiple single step tempering, each single step tempering is the blank that last step is obtained and 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.
Further technical scheme is:
Between described machining and heat treatment, also comprise cleaning step, described cleaning step comprises deoil in sequence matting and baking operation.
Described quenching and tempering also comprise oil removing matting in sequence, drying process and inspection operation.
Described Slow cooling is the cold or oil cooling of stove, and cooling velocity is not more than 30 DEG C/h.
The present invention has following beneficial effect:
This process route is simple, and the annealing steps of setting is intended to the hardness of the blank obtaining after softening forging, to improve its machining property, is convenient to follow-up machining.The restriction of annealing steps distribution heating, heating-up temperature and temperature retention time, is intended to reduce the decarburized amount of the degree that adds thermal deformation, cracking of blank blank in heat treatment process and possibility, material, ensures the quality of the follow-up lathe tool obtaining; Simultaneously by the annealing in process of above technique, can make blank hardness number after annealing below 260HBW; Simultaneously, because the annealing temperature providing is higher, compared to prior art, consuming time in obtaining equal annealing effect is only 2/3rds of prior art, and the annealing steps that above distribution is carried out also helps the production efficiency of lathe tool.
By the preheating step carrying out stage by stage before the quenching arranging, can effectively reduce degree and possibility that blank in heat treatment process adds thermal deformation, cracking, simultaneously, shorter compared to prior art blank time of staying under the condition of high temperature, be conducive to reduce the decarburized amount of blank, can keep enough hardness and wearabilities with the lathe tool that further ensures to obtain.
The tempering step forming by the multiple single step tempering that arrange, can realize the retained austenite existing in the rear blank that quenched constantly decomposes and carbide dispersion sclerosis at the temperature of 500-550 DEG C, in the metallographic structure of blank after single step tempering repeatedly, retained austenite content can reduce greatly, finally obtain the metallographic structure into tempered martensite, fine grained residual carbon compound and a small amount of retained austenite, like this, to bring up to 65-72HRC through the blank hardness number obtaining of quenching, be convenient to improve hardness and the wearability of lathe tool, be beneficial to the service life of lathe tool.
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:
Can reduce fire damage and the lathe tool manufacturing process that is beneficial to processing, comprise blank blanking in sequence, forge, machining, heat treatment and grinding, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises preheating in sequence, heating and thermal insulation, quench and tempering, described pre-thermal recovery heats up and carries out gradually stage by stage, described preheating comprises that the first stage is heated to 450-600 DEG C and is also incubated and is no less than 20min, second stage is heated to 750-800 DEG C and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 DEG C, and insulation is no less than 25min, between described forging and machining, also comprise annealing steps, described annealing steps is the blank step heating that forging is obtained: be heated to 600-650 DEG C of insulation from normal temperature and be no less than 10min, continue to be heated to 850-860 DEG C of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 DEG C/h, described tempering step is made up of multiple single step tempering, each single step tempering is the blank that last step is obtained and 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.
Lathe tool heating process operation provided by the invention is simple, and the annealing steps of setting is intended to the hardness of the blank obtaining after softening forging, to improve its machining property, is convenient to follow-up machining.The restriction of annealing steps distribution heating, heating-up temperature and temperature retention time, is intended to reduce the decarburized amount of the degree that adds thermal deformation, cracking of blank blank in heat treatment process and possibility, material, ensures the quality of the follow-up lathe tool obtaining; Simultaneously by the annealing in process of above technique, can make blank hardness number after annealing below 260HBW; Simultaneously, because the annealing temperature providing is higher, compared to prior art, consuming time in obtaining equal annealing effect is only 2/3rds of prior art, and the annealing steps that above distribution is carried out also helps the production efficiency of lathe tool.
By the preheating step carrying out stage by stage before the quenching arranging, can effectively reduce degree and possibility that blank in heat treatment process adds thermal deformation, cracking, simultaneously, shorter compared to prior art blank time of staying under the condition of high temperature, be conducive to reduce the decarburized amount of blank, can keep enough hardness and wearabilities with the lathe tool that further ensures to obtain.
The tempering step forming by the multiple single step tempering that arrange, can realize the retained austenite existing in the rear blank that quenched constantly decomposes and carbide dispersion sclerosis at the temperature of 500-550 DEG C, in the metallographic structure of blank after single step tempering repeatedly, retained austenite content can reduce greatly, finally obtain the metallographic structure into tempered martensite, fine grained residual carbon compound and a small amount of retained austenite, like this, to bring up to 65-72HRC through the blank hardness number obtaining of quenching, be convenient to improve hardness and the wearability of lathe tool, be beneficial to the service life of lathe tool.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, for the oil stain that prevents from being infected with on blank in mechanical processing process impacts heat treatment, affect the final quality of product, between described machining and heat treatment, also comprise cleaning step, described cleaning step comprises deoil in sequence matting and baking operation.
Further described quenching and tempering also comprise oil removing matting in sequence, drying process and inspection operation.The inspection operation arranging is to check the quenching quality of blank, as the crackle of outward appearance and thermal deformation, uniform quenching degree are observed, to avoid the blank that does not meet quality requirement to enter next step processing and waste operation resource.
Oxidized and prevent that too fast hardness number and the internal stress that affects blank of cooling velocity, described Slow cooling from being the cold or oil cooling of stove in cooling procedure for preventing blank, and cooling velocity is not more than 30 DEG C/h.
Above content is the further description of the present invention being done 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 that draw under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (4)
1. can reduce fire damage and the lathe tool manufacturing process that is beneficial to processing, comprise blank blanking in sequence, forge, machining, heat treatment and grinding, it is characterized in that, described blank is W2MoCr4V2Co8 high-speed tool steel, described heat treatment comprises preheating in sequence, heating and thermal insulation, quench and tempering, described pre-thermal recovery heats up and carries out gradually stage by stage, described preheating comprises that the first stage is heated to 450-600 DEG C and is also incubated and is no less than 20min, second stage is heated to 750-800 DEG C and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 DEG C, and insulation is no less than 25min, between described forging and machining, also comprise annealing steps, described annealing steps is the blank step heating that forging is obtained: be heated to 600-650 DEG C of insulation from normal temperature and be no less than 10min, continue to be heated to 850-860 DEG C of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 DEG C/h, described tempering step is made up of multiple single step tempering, each single step tempering is the blank that last step is obtained and 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.
2. the lathe tool manufacturing process that reduces fire damage and be beneficial to processing according to claim 1, is characterized in that, between described machining and heat treatment, also comprise cleaning step, described cleaning step comprises deoil in sequence matting and baking operation.
3. the lathe tool manufacturing process that reduces fire damage and be beneficial to processing according to claim 1, is characterized in that, described quenching and tempering also comprise oil removing matting in sequence, drying process and inspection operation.
4. according to claim 1ly reduce fire damage and be beneficial to the lathe tool manufacturing process of processing, it is characterized in that, described Slow cooling is the cold or oil cooling of stove, and cooling velocity is not more than 30 DEG C/h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410364991.1A CN104175083A (en) | 2014-07-29 | 2014-07-29 | Turning tool manufacturing technology capable of reducing heat damage and facilitating processing |
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| CN201410364991.1A CN104175083A (en) | 2014-07-29 | 2014-07-29 | Turning tool manufacturing technology capable of reducing heat damage and facilitating processing |
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Cited By (3)
| 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 |
| CN107458675A (en) * | 2017-08-01 | 2017-12-12 | 合肥英源新材料科技有限公司 | A kind of manufacturing process of the cutting knife of vacuum sealer |
| CN113088638A (en) * | 2021-04-07 | 2021-07-09 | 南通四合不锈钢制品有限公司 | Heat treatment process for steel cutter |
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| CN113088638A (en) * | 2021-04-07 | 2021-07-09 | 南通四合不锈钢制品有限公司 | Heat treatment process for steel cutter |
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Application publication date: 20141203 |