CN104128779A - Turning tool machining technology for improving heat treatment efficiency and processing quality - Google Patents
Turning tool machining technology for improving heat treatment efficiency and processing quality Download PDFInfo
- Publication number
- CN104128779A CN104128779A CN201410365776.3A CN201410365776A CN104128779A CN 104128779 A CN104128779 A CN 104128779A CN 201410365776 A CN201410365776 A CN 201410365776A CN 104128779 A CN104128779 A CN 104128779A
- Authority
- CN
- China
- Prior art keywords
- heat treatment
- blank
- tempering
- less
- cold treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a turning tool machining technology for improving heat treatment efficiency and processing quality. The turning tool machining technology comprises the processes of blank blanking, forging, cutting, heat treatment and grinding in sequence, a blank is W2MoCr4V2Co8 high-speed tool steel. The heat treatment process includes preheating, heating and heat insulation, quenching and tempering in sequence. Preheating is conducted in a staged mode with the temperature gradually increased. Quenching is oil cooling, and an annealing step is further set between the forging process and the cutting process. According to the annealing process, the forged blank is heated step by step. The tempering process subsequently comprises the cold treatment step, pretreatment before cold treatment is further set between the cold treatment step and the tempering process, and the cold treatment subsequently comprises water bath tempering. The technology is simple in circuit, high in heat treatment efficiency, good in processing quality and capable of for improving the good wear resistance and the good heat rigidity of products.
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 that is beneficial to heat treatment efficiency and Disposal quality.
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 have the workpiece of rotary surface, take cylinder as main, be 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.
Development along with 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 to optimize the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality of the prior art is further to improve the key point of lathe tool quality.
Summary of the invention
For above-mentioned high-speed steel bit, being prone to wearing and tearing, edge bends, lathe tool rotated strong and impacted the situation that breach etc. is unfavorable for crudy.How further to optimize the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality of the prior art is further to improve the problem of the key point of lathe tool quality, the invention provides a kind of lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality.
For the problems referred to above, the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality provided by the invention reaches goal of the invention by following technical essential: the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality, 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 ℃ and is also incubated and is no less than 20min, second stage is heated to 750-800 ℃ and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 ℃, and insulation is no less than 25min, described quenching is oil cooling, between described forging and machining, also comprise annealing steps, the blank step heating of described annealing steps for forging is obtained: being heated to 600-650 ℃ of insulation from normal temperature is no less than 10min, continue to be heated to 850-860 ℃ of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 ℃/h, the follow-up cold treatment step that also comprises of described tempering process, between described cold treatment step and tempering process, also comprise the front pretreatment of cold treatment, the follow-up water tempering that also comprises of cold treatment, described cold treatment is that the blank that the upper stage was obtained carries out the liquid nitrogen cold treatment of-80 to-150 ℃, before described cold treatment, pretreatment is that 90-100 ℃ of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach that last operation is obtained is no less than 1.5h.
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 ℃/h.
The present invention has following beneficial effect:
1, lathe tool heating process operation provided by the invention is simple, 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, with the lathe tool that further guarantees to obtain, can keep enough hardness and wearabilities.More than the lathe tool hardness number that this process route obtains can reach 70HRC, and there is good wearability and thermohardening.
2, the annealing steps arranging is intended to soften the hardness of the blank obtaining after 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 equally, guarantees 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 when 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.
3, before the cold treatment arranging, cold treatment, in pretreatment and water tempering step, liquid nitrogen cold treatment transforms for the martensite of retained austenite; Before cold treatment, pretreatment is used for eliminating incomplete quench internal stress, so that retained austenite is tended towards stability, stable like this retained austenite can absorb martensitic sharply expansion energy, reduces the transformation stress of retained austenite formation of martensite, to reach the possibility that reduces cold treatment embrittlement; The water tempering arranging is used for eliminating most of cold treatment residual stress.It is 2-5% that austenite maintenance dose in the lathe tool that can make to finish dealing with is more than set, and in lathe tool, internal stress is little, is convenient to promote at double the service life of lathe tool.
The specific embodiment
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 heat treatment efficiency and Disposal quality, 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 ℃ and is also incubated and is no less than 20min, second stage is heated to 750-800 ℃ and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 ℃, and insulation is no less than 25min, described quenching is oil cooling, between described forging and machining, also comprise annealing steps, the blank step heating of described annealing steps for forging is obtained: being heated to 600-650 ℃ of insulation from normal temperature is no less than 10min, continue to be heated to 850-860 ℃ of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 ℃/h, the follow-up cold treatment step that also comprises of described tempering process, between described cold treatment step and tempering process, also comprise the front pretreatment of cold treatment, the follow-up water tempering that also comprises of cold treatment, described cold treatment is that the blank that the upper stage was obtained carries out the liquid nitrogen cold treatment of-80 to-150 ℃, before described cold treatment, pretreatment is that 90-100 ℃ of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach that last operation is obtained is no less than 1.5h.
Lathe tool heating process operation provided by the invention is simple, 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, with the lathe tool that further guarantees to obtain, can keep enough hardness and wearabilities.
The annealing steps arranging is intended to soften the hardness of the blank obtaining after 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 equally, guarantees 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 when 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.
Before the cold treatment arranging, cold treatment, in pretreatment and water tempering step, liquid nitrogen cold treatment transforms for the martensite of retained austenite; Before cold treatment, pretreatment is used for eliminating incomplete quench internal stress, so that retained austenite is tended towards stability, stable like this retained austenite can absorb martensitic sharply expansion energy, reduces the transformation stress of retained austenite formation of martensite, to reach the possibility that reduces cold treatment embrittlement; The water tempering arranging is used for eliminating most of cold treatment residual stress.It is 2-5% that austenite maintenance dose in the lathe tool that can make to finish dealing with is more than set, and in lathe tool, internal stress is little, is convenient to promote at double 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 for checking 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 ℃/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. be beneficial to the lathe tool processing technology of heat treatment efficiency and Disposal quality, 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 ℃ and is also incubated and is no less than 20min, second stage is heated to 750-800 ℃ and is also incubated and is no less than 20min, described heating and thermal insulation is further to heat blank to 1210-1230 ℃, and insulation is no less than 25min, described quenching is oil cooling, between described forging and machining, also comprise annealing steps, the blank step heating of described annealing steps for forging is obtained: being heated to 600-650 ℃ of insulation from normal temperature is no less than 10min, continue to be heated to 850-860 ℃ of insulation and be no less than Slow cooling after 20min, more than the programming rate of heating is not more than 25 ℃/h, the follow-up cold treatment step that also comprises of described tempering process, between described cold treatment step and tempering process, also comprise the front pretreatment of cold treatment, the follow-up water tempering that also comprises of cold treatment, described cold treatment is that the blank that the upper stage was obtained carries out the liquid nitrogen cold treatment of-80 to-150 ℃, before described cold treatment, pretreatment is that 90-100 ℃ of poach is no less than 40min or lonneal is no less than 1h, described water tempering is that the blank poach that last operation is obtained is no less than 1.5h.
2. the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality according to claim 1, it 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 processing technology that is beneficial to heat treatment efficiency and Disposal quality 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. the lathe tool processing technology that is beneficial to heat treatment efficiency and Disposal quality according to claim 1, is characterized in that, described Slow cooling is the cold or oil cooling of stove, and cooling velocity is not more than 30 ℃/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410365776.3A CN104128779A (en) | 2014-07-30 | 2014-07-30 | Turning tool machining technology for improving heat treatment efficiency and processing quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410365776.3A CN104128779A (en) | 2014-07-30 | 2014-07-30 | Turning tool machining technology for improving heat treatment efficiency and processing quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104128779A true CN104128779A (en) | 2014-11-05 |
Family
ID=51801773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410365776.3A Pending CN104128779A (en) | 2014-07-30 | 2014-07-30 | Turning tool machining technology for improving heat treatment efficiency and processing quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104128779A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182926A (en) * | 2018-09-30 | 2019-01-11 | 昆山奥马热工科技有限公司 | A kind of heat treatment process of high-speed steel |
| CN112795762A (en) * | 2020-12-29 | 2021-05-14 | 滁州科诺帝电器有限公司 | Processing technology of grinding knife of soybean milk machine |
| CN113046524A (en) * | 2021-03-05 | 2021-06-29 | 苏州市旭飞精密机械有限公司 | Heat treatment process for traction ring |
-
2014
- 2014-07-30 CN CN201410365776.3A patent/CN104128779A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182926A (en) * | 2018-09-30 | 2019-01-11 | 昆山奥马热工科技有限公司 | A kind of heat treatment process of high-speed steel |
| CN112795762A (en) * | 2020-12-29 | 2021-05-14 | 滁州科诺帝电器有限公司 | Processing technology of grinding knife of soybean milk machine |
| CN113046524A (en) * | 2021-03-05 | 2021-06-29 | 苏州市旭飞精密机械有限公司 | Heat treatment process for traction ring |
| CN113046524B (en) * | 2021-03-05 | 2024-02-27 | 苏州奥轩精密科技有限公司 | Traction ring heat treatment process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104191188A (en) | Cutting tool manufacturing method capable of conveniently reducing austenite residue | |
| CN101549449B (en) | Processing technology for high-strength large hexagon head bolt used for steel structure | |
| CN101403032B (en) | Thermal treatment process for quick cutting steel composite roll | |
| CN105986074A (en) | Die steel processing technology | |
| CN104440009A (en) | Iron sheet cutter manufacturing method | |
| CN105269247A (en) | Processing technology for big high-strength hexagon bolt used for steel structure | |
| CN104259799A (en) | Turning tool processing technology beneficial to production efficiency and product quality | |
| CN104128779A (en) | Turning tool machining technology for improving heat treatment efficiency and processing quality | |
| CN105728964A (en) | Roller build-up welding technology | |
| CN105734231A (en) | Heat treatment process for H13 steel | |
| CN107663575A (en) | Reduce the drill produced technique of crystal defect | |
| CN105714027A (en) | Heat treatment process for hardening and tempering of 45 steel | |
| CN104175083A (en) | Turning tool manufacturing technology capable of reducing heat damage and facilitating processing | |
| CN104357643A (en) | Thermal treatment technology for eliminating meshed carbides after forging of roller | |
| CN104227363A (en) | Turning tool production steps favorable for martensite formation during heat treatment | |
| CN104128777A (en) | Turning tool machining technology capable of reducing heat damage and improving tempering quality | |
| CN107263028A (en) | A kind of processing technology of Novel shaft class part machinery | |
| CN105648177A (en) | Tool steel heat treatment process | |
| CN107058710A (en) | Reduce the drill produced technique of crystal defect | |
| CN104175084A (en) | Manufacturing method facilitating prolonging of service life of turning tool | |
| CN104313258B (en) | A kind of spanner quenching method | |
| CN104128780A (en) | Turning tool machining technology for improving product quality | |
| CN104227364A (en) | Turning tool machining process favorable for machining efficiency | |
| CN104128782A (en) | Turning tool processing technology | |
| CN104259798A (en) | Turning tool machining technology facilitating reduction of heat treatment defects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141105 |
|
| WD01 | Invention patent application deemed withdrawn after publication |