CN111910061A - Subzero treatment method for 65Mn steel - Google Patents
Subzero treatment method for 65Mn steel Download PDFInfo
- Publication number
- CN111910061A CN111910061A CN201910376330.3A CN201910376330A CN111910061A CN 111910061 A CN111910061 A CN 111910061A CN 201910376330 A CN201910376330 A CN 201910376330A CN 111910061 A CN111910061 A CN 111910061A
- Authority
- CN
- China
- Prior art keywords
- steel
- treatment
- test piece
- temperature
- carrying
- 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
Links
Images
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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
-
- 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
- C21D6/005—Heat treatment of ferrous alloys containing Mn
Abstract
The invention provides a cryogenic treatment process method for improving a 65Mn steel heat treatment microstructure and improving comprehensive mechanical property, which comprises the following steps: heating a 65Mn steel test piece to 830-870 ℃, carrying out oil quenching or salt quenching after keeping the temperature for 20-25 minutes, cleaning, then rapidly carrying out cryogenic treatment, controlling the cooling rate to be 1-5 ℃/min according to the simplicity or complexity of the shape of the test piece, controlling the cryogenic treatment temperature to be-160 ℃, carrying out cryogenic treatment for 4-6 hours, then recovering the temperature to the room temperature at the heating rate of 4-10 ℃/min, and finally immediately carrying out corresponding tempering treatment according to the use requirements. The invention can improve the microstructure of the 65Mn steel after conventional heat treatment, improves the comprehensive properties of the 65Mn steel such as strength, hardness, wear resistance and the like, and has the characteristics of simple operation, no damage to workpieces, no pollution, low cost and the like.
Description
Technical Field
The invention belongs to the field of heat treatment, and particularly relates to a cryogenic heat treatment method for 65Mn steel.
Background
The 65Mn steel is high-quality carbon spring steel and is widely used for manufacturing instruments, vehicle springs, machine tools, agricultural machinery and other related wear-resistant parts, but the 65Mn steel has overheating sensitivity and tempering brittleness after being subjected to the traditional heat treatment process, the strength, the hardness, the plasticity and the toughness cannot be considered at the same time, and the dimensional stability and the wear resistance cannot be considered at the same time.
The cryogenic treatment is a strengthening technology for improving the comprehensive performance of materials, and is a process which is continued in the cooling process of the traditional heat treatment. The material is processed at a low temperature below 130 ℃ below zero to improve the microstructure uniformity, the dimensional stability, the residual stress and the like of the material, so that the comprehensive properties of the material, such as strength, toughness, wear resistance and the like, are improved. The technology has the characteristics of simple and convenient operation, no damage to workpieces, no pollution, low cost and the like, and is widely applied to the automobile industry, precision instruments, tools, dies, aerospace, military and the like. At present, few research reports about improving the performance of 65Mn steel by using a cryogenic treatment technology exist, and the cryogenic treatment parameters for improving the performance of 65Mn steel are not clear. Therefore, the invention provides a cryogenic treatment process method of 65Mn steel, which aims to improve the microstructure of the 65Mn steel after the traditional heat treatment and improve the comprehensive mechanical property of the steel.
Disclosure of Invention
The invention aims to provide a cryogenic treatment process method of 65Mn steel, which aims to improve the microstructure of the 65Mn steel after the traditional heat treatment, improve the comprehensive mechanical property and prolong the service life of a workpiece.
The invention mainly provides the following technical scheme:
grinding and polishing the surface of the 65Mn steel test piece by using a grinding machine and metallographic abrasive paper;
quenching a 65Mn steel test piece, heating to 830-870 ℃, preserving heat for 20-25 minutes to ensure that the test piece is completely austenitized (specific parameters are determined according to the application and the size of the test piece), and then performing oil quenching or salt quenching;
cleaning a 65Mn steel test piece by using clear water and a detergent, and removing oil stains on the surface of the 65Mn steel test piece;
cleaning the 65Mn steel test piece by using absolute ethyl alcohol, and quickly carrying out cryogenic treatment after cleaning and drying;
putting a 65Mn steel test piece into cryogenic equipment, introducing cooling media such as liquid nitrogen and the like, slowly cooling the temperature of the test piece from room temperature to-160 ℃, then preserving the temperature for 4-6 hours, controlling the cooling speed at 1-5 ℃/min (the cooling speed is determined according to the size and the shape complexity of the test piece), and then recovering the temperature to room temperature at the heating rate of 4-10 ℃/min (the heating speed is determined according to the size and the shape complexity of the test piece);
immediately carrying out corresponding tempering treatment on the cryogenic treated 65Mn steel test piece according to the use requirement;
the invention can improve the microstructure of the 65Mn steel after conventional heat treatment, improves the comprehensive properties of the 65Mn steel such as strength, hardness, wear resistance and the like, and has the characteristics of simple operation, no damage to workpieces, no pollution, low cost and the like.
Drawings
FIG. 1 is a time temperature profile of the process of the present invention.
FIG. 2 shows the structure and appearance of 65Mn steel without cryogenic treatment.
FIG. 3 shows the structure morphology of 65Mn steel after subzero treatment at-160 ℃ for 6 h.
Detailed Description
Grinding and polishing the surface of the 65Mn steel subsoiler test piece by using a grinding machine and metallographic abrasive paper;
quenching the subsoiler test piece, heating to 850 ℃, preserving heat for 20 minutes to ensure that the subsoiler test piece is completely austenitized, and then carrying out oil quenching;
cleaning a subsoiling shovel test piece by using clear water and a detergent, and removing oil stains on the surface of the subsoiling shovel test piece;
cleaning the subsoiler test piece again by using absolute ethyl alcohol, and rapidly carrying out cryogenic treatment after cleaning and drying;
putting the subsoiler test piece into cryogenic equipment, introducing liquid nitrogen to slowly reduce the temperature of the test piece from room temperature to-160 ℃, then preserving the temperature for 6 hours, controlling the temperature reduction speed at 4 ℃/min, and then recovering the temperature to the room temperature at the temperature rise rate of 4 ℃/min;
immediately tempering the subsoiler test piece, heating to 200 ℃, preserving heat for 2 hours, and then cooling in air;
preferably, under the same quenching and tempering conditions, the average hardness of the common 65Mn steel is 53.1HRC, and the average hardness of the 65Mn steel subjected to deep cooling treatment by the method is 61.1HRC, so that the hardness is improved by 8HRC, and the amplification reaches 15.1%. The deep cooling treatment process can greatly improve the comprehensive performance of the 65Mn steel deep loosening shovel;
the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (5)
- The process sequence of the 1.65Mn steel subzero treatment is that quenching is firstly carried out, subzero treatment is carried out, and tempering is finally carried out.
- The 2.65Mn steel is rapidly subjected to cryogenic treatment after quenching.
- 3. The cooling rate of the deep cooling treatment is controlled within the range of 1-5 ℃/min, and the heating rate is controlled within the range of 4-10 ℃/min.
- The subzero treatment temperature of 4.65Mn steel is about-160 deg.c.
- The subzero treatment time of the 5.65Mn steel is 4-6 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376330.3A CN111910061A (en) | 2019-05-07 | 2019-05-07 | Subzero treatment method for 65Mn steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376330.3A CN111910061A (en) | 2019-05-07 | 2019-05-07 | Subzero treatment method for 65Mn steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111910061A true CN111910061A (en) | 2020-11-10 |
Family
ID=73241939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910376330.3A Pending CN111910061A (en) | 2019-05-07 | 2019-05-07 | Subzero treatment method for 65Mn steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111910061A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073182A (en) * | 2021-03-11 | 2021-07-06 | 南通大学 | Processing method for improving comprehensive performance of maritime work E690 high-strength steel |
| CN115198059A (en) * | 2022-06-09 | 2022-10-18 | 太原理工大学 | Magnetic field cryogenic treatment method for increasing wear resistance of 18CrNiMo7-6 carburizing steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017965A (en) * | 2014-06-24 | 2014-09-03 | 南车眉山车辆有限公司 | Treatment process for improving toughness of Cr12MoV steel |
| CN106399653A (en) * | 2016-09-27 | 2017-02-15 | 中国科学院理化技术研究所 | Method for improving impact toughness of 1Ni9 low-temperature steel |
| CN106521122A (en) * | 2016-11-02 | 2017-03-22 | 华南理工大学 | Subzero treatment technology for improving wear resistance of alloy structural steel |
| CN108754101A (en) * | 2018-07-26 | 2018-11-06 | 东莞材料基因高等理工研究院 | A kind of cryogenic treatment process of AerMet100 steel |
-
2019
- 2019-05-07 CN CN201910376330.3A patent/CN111910061A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017965A (en) * | 2014-06-24 | 2014-09-03 | 南车眉山车辆有限公司 | Treatment process for improving toughness of Cr12MoV steel |
| CN106399653A (en) * | 2016-09-27 | 2017-02-15 | 中国科学院理化技术研究所 | Method for improving impact toughness of 1Ni9 low-temperature steel |
| CN106521122A (en) * | 2016-11-02 | 2017-03-22 | 华南理工大学 | Subzero treatment technology for improving wear resistance of alloy structural steel |
| CN108754101A (en) * | 2018-07-26 | 2018-11-06 | 东莞材料基因高等理工研究院 | A kind of cryogenic treatment process of AerMet100 steel |
Non-Patent Citations (2)
| Title |
|---|
| 刘红梅等: "深冷处理对制砖模具芯杆组织与性能的影响", 《矿冶工程》 * |
| 梁铁山: "65Mn钢磁场深冷处理工艺研究", 《辽宁工程技术大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113073182A (en) * | 2021-03-11 | 2021-07-06 | 南通大学 | Processing method for improving comprehensive performance of maritime work E690 high-strength steel |
| CN115198059A (en) * | 2022-06-09 | 2022-10-18 | 太原理工大学 | Magnetic field cryogenic treatment method for increasing wear resistance of 18CrNiMo7-6 carburizing steel |
| CN115198059B (en) * | 2022-06-09 | 2023-09-08 | 太原理工大学 | Magnetic field cryogenic treatment method for increasing wear resistance of 18CrNiMo7-6 carburizing steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108866472B (en) | Metal material surface treatment method | |
| CN111910061A (en) | Subzero treatment method for 65Mn steel | |
| CN111187899A (en) | Gear heat treatment process | |
| CN111660208A (en) | Composite surface treatment method for prolonging service life of metal processing tool | |
| CN101648334A (en) | Manufacturing technique of austenitic stainless steel cold-rolled plate with good surface performance | |
| CN101445866A (en) | Heat treatment process for water pump shaft connecting bearings | |
| CN105840659A (en) | Bearing ball machining method | |
| CN110538951A (en) | valve body forging process | |
| CN107881295A (en) | A kind of surface treatment method of cast iron die | |
| CN103103321A (en) | Isothermal quenching process | |
| CN105506647A (en) | Heat treatment production technology of super-malleable mild steel screw | |
| CN1986886A (en) | High speed fuel gas spraying process for treating piston rod surface | |
| WO2016027207A1 (en) | A method of hardening die surfaces | |
| JP5682161B2 (en) | Manufacturing method of rolling sliding member | |
| CN104832541A (en) | Bearing sleeve processing technology | |
| CN113930591B (en) | Circulating quenching and fine-grain process for 20Cr2Ni4A steel | |
| CN110216421A (en) | A kind of processing method of gland | |
| CN109338286A (en) | A kind of boron-aluminium co-permeation treatment process of stamping die | |
| CN104227363A (en) | Turning tool production steps favorable for martensite formation during heat treatment | |
| CN104831023A (en) | Thermal treatment technology for ball screws of machine tool | |
| TWI448564B (en) | Method for manufacturing hard-wearing tool steel | |
| CN106756759B (en) | Tough nitriding layer of a kind of ferrous alloy surface height and preparation method thereof | |
| CN115198059B (en) | Magnetic field cryogenic treatment method for increasing wear resistance of 18CrNiMo7-6 carburizing steel | |
| CN106435397A (en) | Carburized bearing roller processing technology | |
| CN112899453B (en) | Method for improving low-temperature toughness of medium carbon steel through tempering deformation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201110 |
|
| WD01 | Invention patent application deemed withdrawn after publication |