CN106521132A - Heat treatment process for composite steel broach - Google Patents
Heat treatment process for composite steel broach Download PDFInfo
- Publication number
- CN106521132A CN106521132A CN201611131179.XA CN201611131179A CN106521132A CN 106521132 A CN106521132 A CN 106521132A CN 201611131179 A CN201611131179 A CN 201611131179A CN 106521132 A CN106521132 A CN 106521132A
- Authority
- CN
- China
- Prior art keywords
- temperature
- broaching tool
- broach
- conducted
- tempering
- 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
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Classifications
-
- 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
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
Abstract
The invention discloses a heat treatment process for a composite steel broach. The heat treatment process includes the following steps that firstly, preheating is conducted, wherein the temperature ranges from 420 DEG C to 540 DEG C, and the preheating time ranges from 4 h to 6 h; secondly, heating is conducted, wherein the temperature ranges from 900 DEG C to 950 DEG C, and the heating time ranges from 1 h to 1.5 h; thirdly, salt bath classification or isothermal quenching is adopted for cooling, and the classification temperature is 590 DEG C; fourthly, the broach is placed on a spiral pressure machine to be straightened, and the temperature is not lower than 200 DEG C; and fifthly, cleaning and tempering are conducted, wherein the broach is cleaned through water with the temperature ranging from 95 DEG C to 100 DEG C, the broach is tempered in a tempering furnace, the medium is 100% KNO3, the temperature is 540 DEG C, heat preservation is conducted for 8 min, and tempering is conducted 2 to 3 times. A tool obtained through a broach material formula and a processing process has a series of good performance that strength and hardness are high, the wear resistance is good, the red hardness is good, the thermal expansion coefficient is small, the elasticity modulus is high, and the chemical stability is good.
Description
Technical field
The present invention relates to the Technology for Heating Processing of clad steel broaching tool.
Background technology
For the forming tool of broaching.There is multiple rows of cutter tooth on tool surface, the size and dimension of each row's cutter tooth is from incision end
Increase successively and change to end is cut out.When broaching tool makees broaching motion, each cutter tooth just cuts certain thickness gold from workpiece
Category, finally gives required size and dimension.Broaching tool be usually used in batch and it is a large amount of produce in process circular hole, splined hole, keyway,
Plane and profiled surface etc., productivity ratio is very high.Broaching tool presses the difference at finished surface position, is divided into inside broach and broach for external bracing；By work
The difference of force way when making, is divided into broaching tool and push broach.Push broach is usually used in the type hole after calibrating heat treatment.
But as broaching tool toughness of material is not high enough, hardness is low, using a period of time after, would tend to occur local scratch defect
When, for example, cutter tooth cutting edge has the breach damaged；Broaching tool shape of chip pocket after repeatedly sharpening causes rough step
Shape, to cause chip curling smoothly not squeeze bad. cutter tooth and scuffing finished surface etc..
The content of the invention
The present invention provides a kind of clad steel broaching tool Technology for Heating Processing, comprises the steps：
(1) preheat：Temperature is 420～540 DEG C, and preheating time is 4～6h；
(2) heat：Temperature is 900～950 DEG C, and heat time heating time is 1～1.5h；
(3) cooling is classified with salt bath or isothermal hardening, and hierarchical temperature is 590 DEG C；
(4) broaching tool is placed on fly press carries out alignment, and temperature is not less than 200 DEG C；
(5) cleaning tempering, cleans broaching tool using 95～100 DEG C of water, and broaching tool is tempered in tempering furnace, and medium is 100%
KNO3；Temperature is 540 DEG C, is incubated 8min, is tempered 2～3 times.
Further, in above-mentioned technical proposal, in step (1), preheating temperature is 500 DEG C, and preheating time is 5h.
Further, in above-mentioned technical proposal, in step (2), heating-up temperature is 920 DEG C, and heat time heating time is 1.5h.
Further, in above-mentioned technical proposal, in step (3), salt bath composition is 55%KCl+45%NaCl.
Further, in above-mentioned technical proposal, tempering 3 times in step (5).
Invention beneficial effect
Through the product for arriving of the Technology for Heating Processing of clad steel broaching tool of the present invention, intensity and hardness are high, wearability is good, red hard
A series of premium properties such as the good, thermal coefficient of expansion of property is little, elastic modelling quantity is high and chemical stability is good.
Specific embodiment
Following nonlimiting examples can make one of ordinary skill in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Embodiment 1
A kind of clad steel broaching tool Technology for Heating Processing, comprises the steps：
(1) preheat：Temperature is 540 DEG C, and preheating time is 4h；
(2) heat：Temperature is 950 DEG C, and heat time heating time is 1h；
(3) cooling is classified with salt bath or isothermal hardening, and hierarchical temperature is 590 DEG C；Salt bath composition is 55%KCl+45%
NaCl。
(4) broaching tool is placed on fly press carries out alignment, and temperature is not less than 200 DEG C；
(5) cleaning tempering, cleans broaching tool using 95～100 DEG C of water, and broaching tool is tempered in tempering furnace, and medium is 100%
KNO3；Temperature is 540 DEG C, is incubated 8min, is tempered 2 times.
Embodiment 2
A kind of clad steel broaching tool Technology for Heating Processing, comprises the steps：
(1) preheat：Temperature is 420 DEG C, and preheating time is 6h；
(2) heat：Temperature is 900 DEG C, and heat time heating time is 1.5h；
(3) cooling is classified with salt bath or isothermal hardening, and hierarchical temperature is 590 DEG C；
(4) broaching tool is placed on fly press carries out alignment, and temperature is not less than 200 DEG C；
(5) cleaning tempering, cleans broaching tool using 95～100 DEG C of water, and broaching tool is tempered in tempering furnace, and medium is 100%
KNO3；Temperature is 540 DEG C, is incubated 8min, is tempered 3 times.
Through the product for arriving of the Technology for Heating Processing of clad steel broaching tool of the present invention, intensity and hardness are high, wearability is good, red hard
A series of premium properties such as the good, thermal coefficient of expansion of property is little, elastic modelling quantity is high and chemical stability is good.
Claims (5)
1. a kind of clad steel broaching tool Technology for Heating Processing, it is characterised in that comprise the steps：
(1) preheat：Temperature is 420～540 DEG C, and preheating time is 4～6h；
(2) heat：Temperature is 900～950 DEG C, and heat time heating time is 1～1.5h；
(3) cooling is classified with salt bath or isothermal hardening, and hierarchical temperature is 590 DEG C；
(4) broaching tool is placed on fly press carries out alignment, and temperature is not less than 200 DEG C；
(5) cleaning tempering, cleans broaching tool using 95～100 DEG C of water, and broaching tool is tempered in tempering furnace, and medium is 100%KNO3；Temperature
Spend for 540 DEG C, be incubated 8min, be tempered 2～3 times.
2. clad steel broaching tool Technology for Heating Processing according to claim 1, it is characterised in that preheating temperature is 500 in step (1)
DEG C, preheating time is 5h.
3. clad steel broaching tool Technology for Heating Processing according to claim 1, it is characterised in that heating-up temperature is 920 in step (2)
DEG C, heat time heating time is 1.5h.
4. clad steel broaching tool Technology for Heating Processing according to claim 1, it is characterised in that salt bath composition is in step (3)
55%KCl+45%NaCl.
5. clad steel broaching tool Technology for Heating Processing according to claim 1, it is characterised in that tempering 3 times in step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611131179.XA CN106521132A (en) | 2016-12-09 | 2016-12-09 | Heat treatment process for composite steel broach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611131179.XA CN106521132A (en) | 2016-12-09 | 2016-12-09 | Heat treatment process for composite steel broach |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106521132A true CN106521132A (en) | 2017-03-22 |
Family
ID=58342891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611131179.XA Pending CN106521132A (en) | 2016-12-09 | 2016-12-09 | Heat treatment process for composite steel broach |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106521132A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131838A (en) * | 2013-03-20 | 2013-06-05 | 沈阳飞机工业（集团）有限公司 | Welding thermal treatment process for welding hard alloy blade tool |
| CN105755257A (en) * | 2014-12-13 | 2016-07-13 | 重庆泰达模具制造有限公司 | Broaching tool heat treatment technology |
-
2016
- 2016-12-09 CN CN201611131179.XA patent/CN106521132A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131838A (en) * | 2013-03-20 | 2013-06-05 | 沈阳飞机工业（集团）有限公司 | Welding thermal treatment process for welding hard alloy blade tool |
| CN105755257A (en) * | 2014-12-13 | 2016-07-13 | 重庆泰达模具制造有限公司 | Broaching tool heat treatment technology |
Non-Patent Citations (1)
| Title |
|---|
| 徐蓉: "W12Cr4V4Mo涡轮盘开槽粗拉刀热处理工艺的探讨", 《金属热处理》 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |
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| RJ01 | Rejection of invention patent application after publication |