CN105755257A - Broaching tool heat treatment technology - Google Patents
Broaching tool heat treatment technology Download PDFInfo
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- CN105755257A CN105755257A CN201410761923.9A CN201410761923A CN105755257A CN 105755257 A CN105755257 A CN 105755257A CN 201410761923 A CN201410761923 A CN 201410761923A CN 105755257 A CN105755257 A CN 105755257A
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- broaching tool
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- tempering
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Abstract
The invention discloses a broaching tool heat treatment technology. The technology is characterized by comprising: 1) a technological process, which consists of: clamping, first preheating, second preheating, heating, cooling, heat straightening, cleaning and tempering, heat straightening, tempering, handle treatment, cleaning, inspection, and surface treatment; 2) technological requirements: (1) preheating; (2) quenching heating: the grain size of the broaching tool is controlled at 9-10 level, and the heating coefficient is 10-15s/mm; (3) cooling: grading or isothermal quenching is adopted, the grading temperature is 580-620DEG C, the salt bath components include 50%BaCl2+30%KCl+20%NaCl, when the surface temperature reaches 65-70DEG C, the broaching tool is transferred into a 220-250DEG C nitrate solution to perform heat preservation for 30-40min; (4) heat straightening; (5) cleaning and tempering; (6) heat straightening; and (7) handle treatment.
Description
Technical field
The present invention relates to a kind of broaching tool Technology for Heating Processing.
Background technology
Broaching tool is a kind of slow cutting endoporus and the cutter of exit orifice, and for multiple-cutting-edge stairstepping toothed tool, per tooth has independent shear action.To bear higher frictional force in the course of the work, it is desirable to there is high wearability and red hardness, have higher mechanical property simultaneously, according to the working condition of broaching tool, use high-speed tool steel to make and meet its technology requirement.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of broaching tool Technology for Heating Processing, and this Technology for Heating Processing can improve wearability and the red hardness of broaching tool.
For achieving the above object, the invention provides a kind of broaching tool Technology for Heating Processing, it is characterized in that, comprise the steps: 1) technological process: be installed one once preheat a secondary preheating one heat one cooling one hot alignment one clean tempering one hot alignment one be tempered one shank process one cleaning one inspection one surface process；
2) technological requirement: preheating, respectively with chamber type electric resistance furnace and middle thermohaline liquid furnace, finally heated is carried out in High Temperature Salt Bath Furnace Cao, is tempered at nitrate furnace or resistance furnace；
(1) preheating: once preheating and secondary preheating can be divided into by the diameter difference of broaching tool, purpose is to eliminate machining stress, makes internal and external temperature consistent, reduces the deformation of broaching tool, temperature is respectively 550600 DEG C and 800850 DEG C, and preheating time is 3 times and 2 times of finally heated time；
(2) Quench heating
The grain size of broaching tool controls at 910 grades, and heating coefficient is 1015s/mm；
(3) cooling
With classification or isothermal hardening, hierarchical temperature is 580620 DEG C, and salt bath composition is 50%BaCl2 +
30%KCl+20%NaCl, when surface temperature to 65070 DEG C, proceeds to be incubated in the salt made from earth containing a comparatively high percentage of sodium chloride of 22G250 DEG C 3040min；
(4) hot alignment
Quickly take out from nitrate furnace, broaching tool is placed on fly press and carries out alignment, it is contemplated that cooling rate is too fast, will be not less than alignment at a temperature of 200 DEG C, take the measure that school is crossed, to prevent it from rebounding；
(5) tempering is cleaned
Boiled water groove boils the residual salt on clean broaching tool surface, and broaching tool inserts jam-packed tempering in circular tempering basket vertically upward, and medium is 100%KNO3；Temperature is 5405601, is incubated 80
L00min, is tempered 3 times；
(6) hot alignment
With hand press alignment broaching tool after coming out of the stove, typically it is cooled to 400 DEG C: left and right starts pressurization, is as cold as room temperature and sheds pressure；When the convex surface of two bending broaching tools is close together, centre wedge beyond the Great Wall, two is put in stove and is tempered, it is possible to have good effect；
(7) shank processes
Shank is heated in the salt bath furnace of 850 DEG C surface color consistent with salt bath time, choose the cold or air cooling of oil, shank the most also can be borrowed to carry out alignment broaching tool, be directed to part and bend and meet the requirement of minimizing tough portion beat.
The invention has the beneficial effects as follows: the Technology for Heating Processing of the present invention can improve broaching tool wearability and red firmly.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of broaching tool Technology for Heating Processing, it is characterized in that, comprise the steps: 1) technological process: be installed one once preheat a secondary preheating one heat one cooling one hot alignment one clean tempering one hot alignment one be tempered one shank process one cleaning one inspection one surface process；
2) technological requirement: preheating, respectively with chamber type electric resistance furnace and middle thermohaline liquid furnace, finally heated is carried out in High Temperature Salt Bath Furnace Cao, is tempered at nitrate furnace or resistance furnace；
(1) preheating: once preheating and secondary preheating can be divided into by the diameter difference of broaching tool, purpose is to eliminate machining stress, makes internal and external temperature consistent, reduces the deformation of broaching tool, temperature is respectively 550600 DEG C and 800850 DEG C, and preheating time is 3 times and 2 times of finally heated time；
(2) Quench heating
The grain size of broaching tool controls at 910 grades, and heating coefficient is 1015s/mm；
(3) cooling
With classification or isothermal hardening, hierarchical temperature is 580620 DEG C, and salt bath composition is 50%BaCl2 +
30%KCl+20%NaCl, when surface temperature to 65070 DEG C, proceeds to be incubated in the salt made from earth containing a comparatively high percentage of sodium chloride of 22G250 DEG C 3040min；
(4) hot alignment
Quickly take out from nitrate furnace, broaching tool is placed on fly press and carries out alignment, it is contemplated that cooling rate is too fast, will be not less than alignment at a temperature of 200 DEG C, take the measure that school is crossed, to prevent it from rebounding；
(5) tempering is cleaned
Boiled water groove boils the residual salt on clean broaching tool surface, and broaching tool inserts jam-packed tempering in circular tempering basket vertically upward, and medium is 100%KNO3；Temperature is 5405601, is incubated 80
L00min, is tempered 3 times；
(6) hot alignment
With hand press alignment broaching tool after coming out of the stove, typically it is cooled to 400 DEG C: left and right starts pressurization, is as cold as room temperature and sheds pressure；When the convex surface of two bending broaching tools is close together, centre wedge beyond the Great Wall, two is put in stove and is tempered, it is possible to have good effect；
(7) shank processes
Shank is heated in the salt bath furnace of 850 DEG C surface color consistent with salt bath time, choose the cold or air cooling of oil, the most also shank can be borrowed to carry out alignment broaching tool, be directed to part press-bending and meet the requirement reducing tough portion beat, this Technology for Heating Processing can improve wearability and the red hardness of broaching tool.
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.Therefore, all technical staff in the art, all should be in the protection domain being defined in the patent claims the most on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a broaching tool Technology for Heating Processing, it is characterized in that, comprise the steps: 1) technological process: be installed one once preheat a secondary preheating one heat one cooling one hot alignment one clean tempering one hot alignment one be tempered one shank process one cleaning one inspection one surface process；
2) technological requirement: preheating, respectively with chamber type electric resistance furnace and middle thermohaline liquid furnace, finally heated is carried out in High Temperature Salt Bath Furnace Cao, is tempered at nitrate furnace or resistance furnace；
(1) preheating: once preheating and secondary preheating can be divided into by the diameter difference of broaching tool, purpose is to eliminate machining stress, makes internal and external temperature consistent, reduces the deformation of broaching tool, temperature is respectively 550600 DEG C and 800850 DEG C, and preheating time is 3 times and 2 times of finally heated time；
(2) Quench heating
The grain size of broaching tool controls at 910 grades, and heating coefficient is 1015s/mm；
(3) cooling
With classification or isothermal hardening, hierarchical temperature is 580620 DEG C, and salt bath composition is 50%BaCl2 + 30%KCl+20%NaCl, when surface temperature to 65070 DEG C, proceeds to be incubated in the salt made from earth containing a comparatively high percentage of sodium chloride of 22G250 DEG C 3040min；
(4) hot alignment
Quickly take out from nitrate furnace, broaching tool is placed on fly press and carries out alignment, it is contemplated that cooling rate is too fast, will be not less than alignment at a temperature of 200 DEG C, take the measure that school is crossed, to prevent it from rebounding；
(5) tempering is cleaned
Boiled water groove boils the residual salt on clean broaching tool surface, and broaching tool inserts jam-packed tempering in circular tempering basket vertically upward, and medium is 100%KNO3；Temperature is 5405601, is incubated 80 l00min, is tempered 3 times；
(6) hot alignment
With hand press alignment broaching tool after coming out of the stove, typically it is cooled to 400 DEG C: left and right starts pressurization, is as cold as room temperature and sheds pressure；When the convex surface of two bending broaching tools is close together, centre wedge beyond the Great Wall, two is put in stove and is tempered, it is possible to have good effect；
(7) shank processes
Shank is heated in the salt bath furnace of 850 DEG C surface color consistent with salt bath time, choose the cold or air cooling of oil, shank the most also can be borrowed to carry out alignment broaching tool, be directed to part and bend and meet the requirement of minimizing tough portion beat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761923.9A CN105755257A (en) | 2014-12-13 | 2014-12-13 | Broaching tool heat treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761923.9A CN105755257A (en) | 2014-12-13 | 2014-12-13 | Broaching tool heat treatment technology |
Publications (1)
| Publication Number | Publication Date |
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| CN105755257A true CN105755257A (en) | 2016-07-13 |
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| CN201410761923.9A Pending CN105755257A (en) | 2014-12-13 | 2014-12-13 | Broaching tool heat treatment technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521132A (en) * | 2016-12-09 | 2017-03-22 | 大连圣洁热处理科技发展有限公司 | Heat treatment process for composite steel broach |
| CN108359785A (en) * | 2018-03-19 | 2018-08-03 | 盐城工学院 | A kind of strengthening and toughening treatment method of W6Mo5Cr4V2 high-speed steel broaches |
| CN108676990A (en) * | 2018-05-18 | 2018-10-19 | 西京学院 | A kind of heat treatment process of 3Cr2W8V molds |
| CN111485071A (en) * | 2020-04-01 | 2020-08-04 | 南京工艺装备制造有限公司 | Quenching, tempering and straightening method for asymmetric structure clamp body in machining center |
-
2014
- 2014-12-13 CN CN201410761923.9A patent/CN105755257A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521132A (en) * | 2016-12-09 | 2017-03-22 | 大连圣洁热处理科技发展有限公司 | Heat treatment process for composite steel broach |
| CN108359785A (en) * | 2018-03-19 | 2018-08-03 | 盐城工学院 | A kind of strengthening and toughening treatment method of W6Mo5Cr4V2 high-speed steel broaches |
| CN108359785B (en) * | 2018-03-19 | 2019-12-17 | 盐城工学院 | Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach |
| CN108676990A (en) * | 2018-05-18 | 2018-10-19 | 西京学院 | A kind of heat treatment process of 3Cr2W8V molds |
| CN111485071A (en) * | 2020-04-01 | 2020-08-04 | 南京工艺装备制造有限公司 | Quenching, tempering and straightening method for asymmetric structure clamp body in machining center |
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Application publication date: 20160713 |
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