CN107058710A - Reduce the drill produced technique of crystal defect - Google Patents
Reduce the drill produced technique of crystal defect Download PDFInfo
- Publication number
- CN107058710A CN107058710A CN201710231194.XA CN201710231194A CN107058710A CN 107058710 A CN107058710 A CN 107058710A CN 201710231194 A CN201710231194 A CN 201710231194A CN 107058710 A CN107058710 A CN 107058710A
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- CN
- China
- Prior art keywords
- quenching
- heated
- crystal defect
- preheating
- blank
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- 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.)
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Classifications
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- 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
-
- 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
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/007—Heat treatment of ferrous alloys containing Co
Abstract
The invention discloses the drill produced technique of reduction crystal defect, the blank blanking carried out including order, forging, machining, heat treatment and grinding, the heat treatment includes preheating, heating and thermal insulation, quenching and tempering, the preheating is to be first heated to 550 600 DEG C and be incubated after 10 20min, it is again heated to 800~850 DEG C and is incubated 10 20min, the quenching is included at 450 500 DEG C middle temperature at low-temperature prewarming and 800 850 DEG C and preheated, it is then heated to 1,200 1250 DEG C of quenchings, the quenching is using classification cooling, first sample is put into salt bath furnace from glowing furnace to be cooled to after 580 600 DEG C to take out and continues to cool down in atmosphere；The preheating, heating and thermal insulation, quenching are carried out in atmosphere furnace, and nitrogen is used in the atmosphere furnace.The present invention can reduce the crystal defect produced in drill bit in process of production, reduce internal stress, strengthen the intensity of drill bit, extend the service life of instrument.
Description
Technical field
The present invention relates to a kind of production technology, and in particular to the drill produced technique of reduction crystal defect.
Background technology
Lathe is considered as the work " machine tool " of all devices in mechanical processing industry.Lathe be mainly used in processing axle,
Disk, set and other there is the workpiece of rotary surface, be using most wide by one in machine-building and repair factory based on cylinder
Class lathe, drill bit is to be used to the drilling on solid material to go out through hole or blind hole, and can be to the cutter of existing hole reaming.Conventional
Drill bit mainly has fluted drill, chit drill, centre drill, depth drill and cylindrical drill.Drill bit is knife most widely used during precision optical machinery is processed
One of tool.
With the development of Modern Manufacturing Technology, high-speed steel drill is widely used in machining, is bored during use
Head fore-end to bear very big pressure, rub, impact and work at a higher temperature, this cause high-speed steel drill compared with
Easily appearance is worn and torn, bent, drill bit rotates the situation that too strong and impact breach or even fracture etc. are unfavorable for crudy.How one is entered
The production and processing manufacture method of step optimization drill bit of the prior art is the further key point for improving drill quality.
The content of the invention
The technical problems to be solved by the invention be high-speed steel drill be easier to occur abrasion, bending, drill bit rotate it is too strong and
The even fracture etc. of impact breach is unfavorable for the situation of crudy, it is therefore intended that provide the drill produced work of reduction crystal defect
Skill, the crystal defect produced in drill bit can be reduced in process of production, reduce internal stress, strengthen the intensity of drill bit, extension
The service life of instrument.
The present invention is achieved through the following technical solutions：
Reduce crystal defect drill produced technique, including order carry out blank blanking, forging, machining, Re Chu
Reason and grinding, it is characterised in that the blank is W6Mo5Cr4V2Co8 high-speed steel, the heat treatment includes preheating, heating
Insulation, quenching and be tempered, the preheating to be first heated to 550-600 DEG C and be incubated after 10-20min, be again heated to 800~
850 DEG C and 10-20min is incubated, the quenching is included at 450-500 DEG C middle temperature preheating at low-temperature prewarming and 800-850 DEG C, so
After be heated to 1200-1250 DEG C quenching, it is described quenching using classification cooling, first sample is put into from glowing furnace cold in salt bath furnace
But continue to cool down in atmosphere to taking out after 580-600 DEG C；The preheating, heating and thermal insulation, quenching are carried out in atmosphere furnace, institute
State and nitrogen is used in atmosphere furnace；The tempering step is made up of multiple single steps tempering, and each single step tempering is by last step
Obtained blank is heated to 500-550 DEG C, and insulation is no less than air cooling or oil cooling after 0.8h.
The drill produced technique of the present invention, in heating process, employs nitrogen gas and is protected, it is therefore prevented that drill bit exists
The reaction such as oxidation occurs under hot environment so as to produce lattice defect, causes hardness to decline；Preheating step, can effectively reduce heat
Heat distortion, the degree and possibility of cracking occur for blank in processing procedure, meanwhile, wherein the soaking time control preheated exists
Within 10-20min, compared to prior art blank, the residence time is shorter at high operating temperatures, advantageously reduces the decarburization of blank
Amount, reduces heating-up temperature and residence time at high temperature, making the tendency of steel decarburization reduces as much as possible；Quenching is cold using being classified
But, the quantity of retained austenite can be farthest reduced, further ensuring drill bit has enough hardness and wearability.
Also include annealing steps between the forging and machining, the annealing steps are that will forge obtained blank point
Step heating：I.e. from normal temperature be heated to 600-650 DEG C of insulation no less than 10min, continue to be heated to after 880-920 DEG C of insulation 3-5h with
15-20 DEG C of cooling velocity is come out of the stove after being cooled to 500 DEG C.Annealing steps are intended to the hardness of the blank obtained after strain spheroidizing, with
Its machining property is improved, is easy to follow-up machining.The limit of annealing steps distribution heating, heating-up temperature and soaking time
It is fixed, it is intended to reduce the blank heat distortion of blank, the degree of cracking and possibility, decarburized amount of material in heat treatment process,
Ensure the quality of drill bit subsequently obtained.
Also include cleaning step between the machining and heat treatment, the cleaning step includes deoiling for order progress
Matting and baking operation, to prevent the oil stain being infected with mechanical processing process on blank from being impacted to heat treatment, shadow
The final quality of product is rung, cleaning step is also included between the machining and heat treatment, the cleaning step includes order
Deoil matting and the baking operation carried out.
The rate of heat addition in the heat treatment is 30-32 DEG C/h, can reasonably shorten the total time of heating, further drop
The low residence time at high temperature.
The quenching and tempering also include oil removing matting, drying process and inspection operation that order is carried out, setting
Inspection operation is checks the quenching quality of blank, the crackle of such as outward appearance and thermal deformation, the observation of uniform quenching degree, to avoid not being inconsistent
The blank for closing quality requirement enters next step processing and wastes operation resource.
The present invention compared with prior art, has the following advantages and advantages：
1st, the drill produced technique of present invention reduction crystal defect, the crystalline substance produced in drill bit can be reduced in process of production
Volume defect, reduces internal stress, strengthens the intensity of drill bit, extends the service life of instrument；
2nd, the drill produced technique of present invention reduction crystal defect, annealing steps are intended to the blank obtained after strain spheroidizing
Hardness, to improve its machining property, is easy to follow-up machining.Annealing steps distribution heating, heating-up temperature and insulation
The restriction of time, it is intended to reduce the blank heat distortion of blank, the degree of cracking and possibility, material in heat treatment process
Decarburized amount, it is ensured that the quality of the drill bit subsequently obtained；
3rd, the drill produced technique of present invention reduction crystal defect, the rate of heat addition in heat treatment is 30-32 DEG C/h, can
The rational total time for shortening heating, it reduce further the residence time at high temperature.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, to present invention work
Further to describe in detail, exemplary embodiment and its explanation of the invention is only used for explaining the present invention, is not intended as to this
The restriction of invention.
Embodiment
The drill produced technique of reduction crystal defect of the invention, including blank blanking, forging, cutting that order is carried out add
Work, heat treatment and grinding, the blank are W6Mo5Cr4V2Co8 high-speed steel, and the heat treatment includes preheating, heating and protected
Temperature, quenching and tempering, the preheating are again heated to 800~850 to be first heated to 550-600 DEG C and being incubated after 10-20min
DEG C and be incubated 10-20min, the quenching is included at 450-500 DEG C middle temperature preheating at low-temperature prewarming and 800-850 DEG C, then
1200-1250 DEG C of quenching is heated to, sample is first put into salt bath furnace and cooled down using classification cooling by the quenching from glowing furnace
Taken out after to 580-600 DEG C and continue to cool down in atmosphere；The preheating, heating and thermal insulation, quenching are carried out in atmosphere furnace, described
Nitrogen is used in atmosphere furnace；The tempering step is made up of multiple single steps tempering, and each single step tempering is to obtain last step
To blank be heated to 500-550 DEG C, insulation is no less than air cooling or oil cooling after 0.8h.
The drill produced technique of the present invention, in heating process, employs nitrogen gas and is protected, it is therefore prevented that drill bit exists
The reaction such as oxidation occurs under hot environment so as to produce lattice defect, causes hardness to decline；Preheating step, can effectively reduce heat
Heat distortion, the degree and possibility of cracking occur for blank in processing procedure, meanwhile, wherein the soaking time control preheated exists
Within 10-20min, compared to prior art blank, the residence time is shorter at high operating temperatures, advantageously reduces the decarburization of blank
Amount, reduces heating-up temperature and residence time at high temperature, making the tendency of steel decarburization reduces as much as possible；Quenching is cold using being classified
But, the quantity of retained austenite can be farthest reduced, further ensuring drill bit has enough hardness and wearability.
It is preferred that, annealing steps are also included between the forging and machining, the annealing steps are to obtain forging
Blank step heating：I.e. from normal temperature be heated to 600-650 DEG C of insulation no less than 10min, continue to be heated to 880-920 DEG C of insulation
Come out of the stove after being cooled to 500 DEG C after 3-5h with 15-20 DEG C of cooling velocity.Annealing steps are intended to the blank obtained after strain spheroidizing
Hardness, to improve its machining property, is easy to follow-up machining.Annealing steps distribution heating, heating-up temperature and insulation
The restriction of time, it is intended to reduce the blank heat distortion of blank, the degree of cracking and possibility, material in heat treatment process
Decarburized amount, it is ensured that the quality of the drill bit subsequently obtained.
It is preferred that, cleaning step is also included between the machining and heat treatment, the cleaning step includes order and entered
Capable deoil matting and baking operation, to prevent the oil stain being infected with mechanical processing process on blank from being caused to heat treatment
Influence, influences the final quality of product, cleaning step, the cleaning step bag is also included between the machining and heat treatment
Include deoil matting and baking operation that order is carried out.
It is preferred that, the rate of heat addition in the heat treatment is 30-32 DEG C/h, can reasonably shorten the total time of heating,
It reduce further the residence time at high temperature.
It is preferred that, the quenching and tempering also include oil removing matting, drying process and inspection operation that order is carried out,
The inspection operation of setting is checks the quenching quality of blank, the crackle of such as outward appearance and thermal deformation, the observation of uniform quenching degree, to keep away
The blank for exempting from not meeting quality requirement enters next step processing and wastes operation resource..
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (5)
1. the drill produced technique of crystal defect is reduced, including blank blanking, forging, machining, the heat treatment that order is carried out
And grinding, it is characterised in that the blank is W6Mo5Cr4V2Co8 high-speed steel, and the heat treatment includes preheating, heating and protected
Temperature, quenching and tempering, the preheating are again heated to 800~850 to be first heated to 550-600 DEG C and being incubated after 10-20min
DEG C and be incubated 10-20min, the quenching is included at 450-500 DEG C middle temperature preheating at low-temperature prewarming and 800-850 DEG C, then
1200-1250 DEG C of quenching is heated to, sample is first put into salt bath furnace and cooled down using classification cooling by the quenching from glowing furnace
Taken out after to 580-600 DEG C and continue to cool down in atmosphere；The preheating, heating and thermal insulation, quenching are carried out in atmosphere furnace, described
Nitrogen is used in atmosphere furnace；The tempering step is made up of multiple single steps tempering, and each single step tempering is to obtain last step
To blank be heated to 500-550 DEG C, insulation is no less than air cooling or oil cooling after 0.8h.
2. the drill produced technique of reduction crystal defect according to claim 1, it is characterised in that the forging and cutting
Also include annealing steps between processing, the annealing steps are that will forge obtained blank step heating：It is heated to from normal temperature
600-650 DEG C of insulation is no less than 10min, continues to be cooled down with 15-20 DEG C of cooling velocity after being heated to 880-920 DEG C of insulation 3-5h
Come out of the stove after to 500 DEG C.
3. it is according to claim 1 reduction crystal defect drill produced technique, it is characterised in that the machining and
Also include cleaning step between heat treatment, the cleaning step includes deoil matting and the baking operation that order is carried out.
4. the drill produced technique of reduction crystal defect according to claim 1, it is characterised in that in the heat treatment
The rate of heat addition is 30-32 DEG C/h.
5. the drill produced technique of reduction crystal defect according to claim 1, it is characterised in that the quenching and tempering
Also include oil removing matting, drying process and inspection operation that order is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710231194.XA CN107058710A (en) | 2017-04-10 | 2017-04-10 | Reduce the drill produced technique of crystal defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710231194.XA CN107058710A (en) | 2017-04-10 | 2017-04-10 | Reduce the drill produced technique of crystal defect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107058710A true CN107058710A (en) | 2017-08-18 |
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ID=59602339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710231194.XA Pending CN107058710A (en) | 2017-04-10 | 2017-04-10 | Reduce the drill produced technique of crystal defect |
Country Status (1)
| Country | Link |
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| CN (1) | CN107058710A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706292A (en) * | 2018-11-27 | 2019-05-03 | 曾华 | A kind of drill produced technique reducing crystal defect |
| CN110004284A (en) * | 2018-01-05 | 2019-07-12 | 成都成量工具集团有限公司 | A kind of tool checks the manufacturing method of dedicated file |
| CN113478303A (en) * | 2021-06-07 | 2021-10-08 | 东台升华工具有限公司 | Drill bit production process capable of reducing crystal defects |
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| CN104191188A (en) * | 2014-07-29 | 2014-12-10 | 成都亨通兆业精密机械有限公司 | Cutting tool manufacturing method capable of conveniently reducing austenite residue |
| CN104259799A (en) * | 2014-07-30 | 2015-01-07 | 成都兴博达精密机械有限公司 | Turning tool processing technology beneficial to production efficiency and product quality |
| CN104451106A (en) * | 2013-09-17 | 2015-03-25 | 李少洋 | Heat treatment process of high-speed steel taper shank twist drill |
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2017
- 2017-04-10 CN CN201710231194.XA patent/CN107058710A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2410223C2 (en) * | 2008-12-18 | 2011-01-27 | Открытое акционерное общество "Синарский трубный завод" (ОАО "СинТЗ") | Internal weld trimmer and method of its thermal processing |
| CN104451106A (en) * | 2013-09-17 | 2015-03-25 | 李少洋 | Heat treatment process of high-speed steel taper shank twist drill |
| CN104175083A (en) * | 2014-07-29 | 2014-12-03 | 成都亨通兆业精密机械有限公司 | Turning tool manufacturing technology capable of reducing heat damage and facilitating processing |
| CN104191188A (en) * | 2014-07-29 | 2014-12-10 | 成都亨通兆业精密机械有限公司 | Cutting tool manufacturing method capable of conveniently reducing austenite residue |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004284A (en) * | 2018-01-05 | 2019-07-12 | 成都成量工具集团有限公司 | A kind of tool checks the manufacturing method of dedicated file |
| CN109706292A (en) * | 2018-11-27 | 2019-05-03 | 曾华 | A kind of drill produced technique reducing crystal defect |
| CN113478303A (en) * | 2021-06-07 | 2021-10-08 | 东台升华工具有限公司 | Drill bit production process capable of reducing crystal defects |
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Application publication date: 20170818 |
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