CN1363694A - Heat treating technology of 30CrMnSi steel for higher toughness and antiwear nature - Google Patents
Heat treating technology of 30CrMnSi steel for higher toughness and antiwear nature Download PDFInfo
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- CN1363694A CN1363694A CN 01100406 CN01100406A CN1363694A CN 1363694 A CN1363694 A CN 1363694A CN 01100406 CN01100406 CN 01100406 CN 01100406 A CN01100406 A CN 01100406A CN 1363694 A CN1363694 A CN 1363694A
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Abstract
A heat treating technology for improving the antiwear nature and toughness of steel 30CrMnSi includes such steps as carburizing, austempering, cooling to ordinary temp and low-temp tempering.
Description
The present invention relates to a kind of tough wear-resisting heat treating method of 30CrMnSi steel, it is applicable to that 30CrMnSi steel workpiece diameter or wall thickness are not more than 8 millimeters and require workpiece inside to have the occasion that high strength and toughness, workpiece surface or local top layer have high rigidity and high-wearing feature.
In background technology, modified formula isothermal quenching is normally only adopted in the 30CrMnSi Heat Treatment Of Steel, and 30CrMnSi steel also not carburizing usually, even carburizing also is difficult to satisfy guaranteeing that workpiece has under the prerequisite of good impelling strength, satisfy the different hardness requirement of top layer carburizing place and inner non-carburizing place simultaneously; And the wear resistance of workpiece is subjected to restriction to a certain degree.For overcoming these defectives, the tough wear-resisting heat treating method of 30CrMmSi steel is studied.
The objective of the invention is to provide a kind of tough wear-resisting heat treating method of 30CrMnSi steel, it can satisfy and is guaranteeing that workpiece has under the prerequisite of good impelling strength, satisfy the different hardness requirement of top layer carburizing place and inner non-carburizing place simultaneously, and the wear resistance height on workpiece carbonization top layer.
The object of the present invention is achieved like this:
It comprises:
A, according to the specific requirement of product parts, to quenched and tempered steel 30CrMnSi steel workpiece, adopt general method for carburizing such as solid carburizing or gas cementation and determine that according to the needed case depth of product parts Heating temperature and carburizing time carry out carburizing to this workpiece surface;
B, to carrying out the workpiece of machining after workpiece after the carburizing or the carburizing again, in 860～900 ℃ of temperature ranges, carry out isothermal quenching, its isothermal refrigerative temperature can determine that the isothermal refrigerative time is 15～20 minutes according to the relation that the hardness requirement and the wall thickness of non-carburizing place of part are pressed 30CrMnSi steel isothermal refrigerative temperature and its hardness and intensity;
C, the cooled workpiece of isothermal is taken out from the isothermal cooling tank, allow its air cooling, make it finish the martensitic transformation of the material structure of carburizing place to room temperature;
D, the workpiece that is cooled to after the room temperature is in time carried out tempering 2～3 hours in 180～250 ℃ of temperature ranges, require and fully eliminate quenching stress with the hardness that guarantees the workpiece carbonization place.
To the workpiece of cementite network tissue is arranged after the carburizing, before to its isothermal quenching, earlier workpiece is heated to 900～950 ℃ and carries out normalizing or modified in advance, to eliminate cementite network tissue and crystal grain thinning in the cementation zone.
The temperature of described isothermal quenching can be 870 ℃, 880 ℃, 890 ℃.
Described tempering temperature can be 190 ℃, 225 ℃, 240 ℃.
The present invention compares the positively effect that is produced with background technology:
1, it can satisfy guaranteeing that workpiece has under the prerequisite of good impelling strength, satisfies the different hardness requirement of top layer carburizing place and inner non-carburizing place simultaneously, and the wear resistance height on workpiece carbonization top layer.
Below in conjunction with accompanying drawing, the present invention is further described:
Fig. 1 is a process flow sheet of the present invention.
Referring to accompanying drawing, when the 30CrMnSi steel is carried out carburizing, but local carburization or whole carburizing, to satisfy the specific requirement of product parts.Method for carburizing and general method for carburizing are similar, can adopt solid carburizing or gas cementation.In case of necessity, carburizing quality such as case depth after the carburizing are tested.Carrying out normalizing or when modified in advance, can adopting salt stove or heating such as vacuum oven, sealed multipurpose furnace,, do not allow case depth to be required because of diffusion surpasses because of heat-up time is long to guarantee not decarburization of workpiece or poor carbon.The isothermal refrigerative time is unsuitable oversize, changes in order to avoid non-martensite microstructure takes place in carburizing place of workpiece, is generally 15～20 minutes.During the isothermal cooling, and, when not easy to crack, also can take water-cooled or other suitable quenchant to be quickly cooled to room temperature when the workpiece simple shape.After tempering, also can check its thermal treatment quality according to the specification of quality of product.
Claims (8)
1, a kind of tough wear-resisting heat treating method of 30CrMnSi steel is characterized in that it comprises:
A, according to the specific requirement of product parts, to quenched and tempered steel 30CrMnSi steel workpiece, adopt general method for carburizing such as solid carburizing or gas cementation and determine that according to the needed case depth of product parts Heating temperature and carburizing time carry out carburizing to this workpiece surface;
B, to carrying out the workpiece of machining after workpiece after the carburizing or the carburizing again, in 860～900 ℃ of temperature ranges, carry out isothermal quenching, its isothermal refrigerative temperature can determine that the isothermal refrigerative time is 15～20 minutes according to the relation that the hardness requirement and the wall thickness of non-carburizing place of part are pressed 30CrMnSi steel isothermal refrigerative temperature and its hardness and intensity;
C, the cooled workpiece of isothermal is taken out from the isothermal cooling tank, allow its air cooling, make it finish the martensitic transformation of the material structure of carburizing place to room temperature;
D, the workpiece that is cooled to after the room temperature is in time carried out tempering 2～3 hours in 180～250 ℃ of temperature ranges, require and fully eliminate quenching stress with the hardness that guarantees the workpiece carbonization place.
2, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1, it is characterized in that before workpiece is carried out isothermal quenching, earlier workpiece is heated to 900～950 ℃ and carries out normalizing or modified in advance, to eliminate cementite network tissue and crystal grain thinning in the cementation zone.
3, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1, the temperature that it is characterized in that described isothermal quenching is 870 ℃.
4, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1, the temperature that it is characterized in that described isothermal quenching is 880 ℃.
5, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1, the temperature that it is characterized in that described isothermal quenching is 890 ℃.
6, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1 is characterized in that described tempering temperature is 190 ℃.
7, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1 is characterized in that described tempering temperature is 225 ℃.
8, the tough wear-resisting heat treating method of 30CrMnSi steel according to claim 1 is characterized in that described tempering temperature is 240 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01100406 CN1253587C (en) | 2001-01-10 | 2001-01-10 | Heat treating technology of 30CrMnSi steel for higher toughness and antiwear nature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01100406 CN1253587C (en) | 2001-01-10 | 2001-01-10 | Heat treating technology of 30CrMnSi steel for higher toughness and antiwear nature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363694A true CN1363694A (en) | 2002-08-14 |
| CN1253587C CN1253587C (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01100406 Expired - Fee Related CN1253587C (en) | 2001-01-10 | 2001-01-10 | Heat treating technology of 30CrMnSi steel for higher toughness and antiwear nature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014280A (en) * | 2012-12-27 | 2013-04-03 | 牡丹江市林海石油打捞工具有限公司 | Machining process capable of improving mechanical strength of thin-walled workpiece |
| CN103276163A (en) * | 2013-05-24 | 2013-09-04 | 许言平 | Method for eliminating net-shaped and chain alloy carbides generated from steel containing Cr and Ni during heat treatment |
| CN107385156A (en) * | 2017-06-29 | 2017-11-24 | 江南工业集团有限公司 | The Strengthening and Toughening composite heat treating method of 30CrMnSiA steel |
| CN112853049A (en) * | 2019-11-27 | 2021-05-28 | 中国科学院金属研究所 | High-performance shaft sleeve material and heat treatment method thereof |
-
2001
- 2001-01-10 CN CN 01100406 patent/CN1253587C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014280A (en) * | 2012-12-27 | 2013-04-03 | 牡丹江市林海石油打捞工具有限公司 | Machining process capable of improving mechanical strength of thin-walled workpiece |
| CN103276163A (en) * | 2013-05-24 | 2013-09-04 | 许言平 | Method for eliminating net-shaped and chain alloy carbides generated from steel containing Cr and Ni during heat treatment |
| CN107385156A (en) * | 2017-06-29 | 2017-11-24 | 江南工业集团有限公司 | The Strengthening and Toughening composite heat treating method of 30CrMnSiA steel |
| CN107385156B (en) * | 2017-06-29 | 2019-01-15 | 江南工业集团有限公司 | The Strengthening and Toughening composite heat treating method of 30CrMnSiA steel |
| CN112853049A (en) * | 2019-11-27 | 2021-05-28 | 中国科学院金属研究所 | High-performance shaft sleeve material and heat treatment method thereof |
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| Publication number | Publication date |
|---|---|
| CN1253587C (en) | 2006-04-26 |
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Address after: Bamboo town Yuhu District 411207 Hunan city of Xiangtan Province Patentee after: Jiangnan Industries Group Co., Ltd. Address before: 411207 Hunan city of Xiangtan Province bamboo Patentee before: Jiangnan Machine Plant |
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Granted publication date: 20060426 Termination date: 20140110 |