CN1147593C - Method for quenching workpieces with reduced deformation - Google Patents
Method for quenching workpieces with reduced deformationInfo
- Publication number
- CN1147593C CN1147593C CNB011053399A CN01105339A CN1147593C CN 1147593 C CN1147593 C CN 1147593C CN B011053399 A CNB011053399 A CN B011053399A CN 01105339 A CN01105339 A CN 01105339A CN 1147593 C CN1147593 C CN 1147593C
- Authority
- CN
- China
- Prior art keywords
- workpiece
- quenching
- carburizing
- deformation
- charging tray
- 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.)
- Expired - Fee Related
Links
- 238000010791 quenching Methods 0.000 title claims abstract description 37
- 230000000171 quenching effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005255 carburizing Methods 0.000 claims description 22
- 238000007669 thermal treatment Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000007306 turnover Effects 0.000 abstract 2
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The present invention relates to a quenching method for reducing workpiece deformation. In heat treatment technology, a rotation angle parameter of a quenching time charging tray is added, and a carburization stage workpiece can be placed according to the mode of reducing high temperature deformation; the charging tray can be forward and laterally turned to 0 to 90 DEG by a turnover mechanism and considering the rotation angle parameter after the carburization is carried out, and thereby, the workpiece can enter a quenching medium in an optimal angle; after the quenching is finished, the workpiece can be restored to the placing state of the stage again by the turnover mechanism, and the workpiece is discharged after being sprayed with oil.
Description
What the present invention relates to is a quenching method, and particularly a kind of quenching method that reduces gear class workpiece deformation belongs to the metal heat treatmet field.
Along with development of modern industry, the heat treatment deformation of workpiece becomes the leading indicator of weighing thermal treatment quality gradually.The factor that influences workpiece deformation is very complicated, comprises raw material characteristics, mechanical processing technique, heat treated holding frame mode and quenchant cooling characteristic etc.Carburizing, quenching are the thermal treatment process of widespread usage in the mechanical industry, and especially the application in the gear industry is more extensive.Workpiece is when the long-time carburizing of high temperature, because creep can take place in the effect of self gravitation, can make workpiece produce very gross distortion when serious, influence quality product, so the rack mounting method of workpiece to consider how to reduce the influence of high temperature creep to workpiece deformation usually during carburizing.Carburizing, quenching realize in sealed-box type multipurpose furnace or continuous acieration furnace usually.In existing carburizing glowing furnace, charging tray all is not rotated, and promptly workpiece is shelved carburizing in which way, just quenches in which way.According to looking into new result, have " Quenchingappts.for stable quality prod.-where workpiece is rotatably supported on rollerdevice and treated with cooling liq.to prevent development of distortion etc. " (make the quenching device of constant product quality---workpiece on lathe, rotate and spray cooling fluid with reduce the distortion, PatentNo.JP 55082725) and " Stacker units for holding shafts to be treated and quenched-which permit the shafts being moved from horizontal to vertical position to reducethermal distortion. ", (clamping mechanism of the quench treatment of axial workpiece---make axle rotate to plumbness to reduce thermal distortion by horizontality, Patent No.EP 491451) etc. two parts of patents relate to when quenching and Workpiece Rotating to be reduced distortion, first patent is that Workpiece Rotating is to reduce distortion when quenching, and second patent is that axial workpiece is rotated to the mechanism of quenching after the plumbness by horizontality.These two patented technologies still can't organically combine workpiece best holding frame mode best holding frame mode when quenching when the carburizing and reduce workpiece deformation.
The objective of the invention is to overcome deficiency of the prior art, a kind of quenching method that reduces gear class workpiece deformation is provided.
Below technical scheme of the present invention and embodiment are described in detail: during quenching, workpiece is cooling rapidly under the effect of heat-eliminating medium, tissue is changed rapidly to martensite by austenite, because the drastic change of temperature and martensite exist very big thermal stresses and structural stresses with the different workpiece inside of causing of austenite specific volume, if the speed of cooling difference between the each several part is very big, can make the very big stress-difference of the inner formation of workpiece, cause workpiece deformation, answer emphasis to consider to make workpiece which kind of angle enter quenchant science the most when therefore quenching with.The present invention is that the best holding frame mode of best holding frame mode when quenching during with gear class workpiece carbonization combines and reduce the distortion of gear class workpiece, according to hoisting type quenching mechanism in the existing industrial furnace is analyzed, quenching mechanism in multipurpose furnace and the continuous oven is improved, in thermal treatment process, charging tray angle of rotation parameter when increasing a quenching, carburizing stage gear class workpiece can be put according to the mode that reduces high temperature deformation, for example gear or bearing ring can adopt and keep flat carburizing, after the carburizing can by switching mechanism make charging tray and with reference to the angle of rotation parameter forward with side direction upset greater than 0 °, smaller or equal to 90 °, thereby making gear class workpiece be best angle enters in the quenchant, after quenching finishes, make gear class workpiece return to the placement state in carburizing stage by switching mechanism again, after drenching oil, come out of the stove.
With the gear is example, if adopt during carburizing the mode that keeps flat to shelve, necessarily is flat condition at traditional industrial furnace middle gear and enters oil sump and quench, and can make the deflection of gear face planeness big like this, and the variation of endoporus circularity is less; If workpiece is to mount to carry out carburizing, in of the effect generation creep of cementation process middle gear, make the variable quantity of workpiece endoporus circularity bigger, and the distortion of quenching aft end face is less relatively owing to self gravitation.
The present invention has substantive distinguishing features and marked improvement, gear keep flat carburizing and keep flat quenching, gear string put carburizing and keep flat quench and gear to keep flat the distortion situation that the carburizing string puts after the quenching as shown in table 1.
Gear shifting quadrant texturing amount under three kinds of different treatment states of table 1
| Keep flat carburizing, keep flat quenching | String is put carburizing, string is put quenching | Keep flat carburizing, go here and there and put quenching | |
| The mean value of circularity (um) | 10.9 | 17.5 | 11.5 |
| The mean value of planeness (um) | 36.8 | 14.3 | 15.6 |
As can be seen from Table 1, the present invention can significantly reduce the distortion of workpiece, can reduce deflection through actual measurement and reach more than 70%, and the distortion of the workpiece that reduces in sealed-box type multipurpose furnace and the continuous carburetion quenching stove to quench is significant.
Claims (1)
1, a kind of quenching method that reduces gear class workpiece deformation, it is characterized in that in thermal treatment process, charging tray angle of rotation parameter when increasing a quenching, carburizing stage gear class workpiece can be put according to the mode that reduces high temperature deformation, after the carburizing can by switching mechanism make charging tray and with reference to the angle of rotation parameter forward with side direction upset greater than 0 °, smaller or equal to 90 °, thereby making gear class workpiece be best angle enters in the quenchant, after quenching finishes, make gear class workpiece return to the placement state in carburizing stage by switching mechanism again, after drenching oil, come out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011053399A CN1147593C (en) | 2001-02-15 | 2001-02-15 | Method for quenching workpieces with reduced deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011053399A CN1147593C (en) | 2001-02-15 | 2001-02-15 | Method for quenching workpieces with reduced deformation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1311339A CN1311339A (en) | 2001-09-05 |
| CN1147593C true CN1147593C (en) | 2004-04-28 |
Family
ID=4654420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011053399A Expired - Fee Related CN1147593C (en) | 2001-02-15 | 2001-02-15 | Method for quenching workpieces with reduced deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1147593C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880757B (en) * | 2010-07-30 | 2012-04-18 | 江苏丰东热技术股份有限公司 | Submerged overturn device |
| CN107937922A (en) * | 2017-12-22 | 2018-04-20 | 沈阳透平机械股份有限公司 | A kind of impervious carbon distorsion during quenching control method of large scale double helical gear |
| CN115354136A (en) * | 2022-07-12 | 2022-11-18 | 太原重工轨道交通设备有限公司 | Heat treatment method for controlling carburizing and quenching distortion of gear |
-
2001
- 2001-02-15 CN CNB011053399A patent/CN1147593C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1311339A (en) | 2001-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMOTIVE TRANSMISSION CO.; SHANGHAI QI Free format text: FORMER OWNER: SHANGHAIAUTOMOBILE CO., LTD. AUTOMOBILE GEAR GENERAL FACTORY Effective date: 20080704 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080704 Address after: Shanghai city Jiading District road 189, zip code: 201822 Co-patentee after: Shanghai Qichun Thermal Treatment Co., Ltd. Patentee after: Shanghai automobile transmission Co., Ltd. Address before: No. 500 Jia Luo Road, Shanghai, Jiading District: 201800 Patentee before: Automobile Gear General Factory, Shanghai Automobile Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: SHANGHAI QICHUN THERMAL TREATMENT CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201822 NO.189, JIALUO HIGHWAY, JIADING DISTRICT, SHANGHAI TO: 201821 NO.506, YECHENG ROAD, JIADING DISTRICT, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110228 Address after: 201821 No. 506, Yecheng Road, Shanghai, Jiading District Patentee after: Shanghai Automotive Transmission Co., Ltd. Address before: 201822 Shanghai city Jiading District Road No. 189 Co-patentee before: Shanghai Qichun Thermal Treatment Co., Ltd. Patentee before: Shanghai Automotive Transmission Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040428 Termination date: 20180215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |