Effect of heat treatment process on microstructure and hardness of Cr12MoV steel

Du Simin; Li Xiong; Lin Faju

doi:10.7513/j.issn.1004-7638.2021.03.023

Volume 42 Issue 3

Jun. 2021

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Du Simin, Li Xiong, Lin Faju. Effect of heat treatment process on microstructure and hardness of Cr12MoV steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 148-154. doi: 10.7513/j.issn.1004-7638.2021.03.023

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Du Simin, Li Xiong, Lin Faju. Effect of heat treatment process on microstructure and hardness of Cr12MoV steel[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 148-154. doi: 10.7513/j.issn.1004-7638.2021.03.023

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Effect of heat treatment process on microstructure and hardness of Cr12MoV steel

doi: 10.7513/j.issn.1004-7638.2021.03.023

Du Simin^{1, 2
,},
Li Xiong^{1, 2},
Lin Faju^{1, 2}

1.
Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Chengdu 610300, Sichuan, China
2.
State Key Laboratory of Marine Equipment Made of Metal Material and Application, Anshan 114009, Liaoning, China

Received Date: 2021-03-24
Publish Date: 2021-06-10

Abstract

Abstract

In this paper the effect of ordinary heat treatment and cryogenic treatment on the microstructure and hardness of Cr12MoV steel had been investigated by microstructure observation using a metallographic microscope, the retained austenite determination by XRD, and the hardness measurement . The results show that the microstructure of Cr12MoV steel after ordinary heat treatment and cryogenic treatment are crypto needle martensite and retained austenite and carbide, and the microstructure changes into tempered martensite and carbide and retained austenite after low temperature tempering at 200 ℃. Cryogenic treatment can greatly reduce the retained austenite in the steel and improve the hardness. The highest hardness is 780 HV30 when steel are quenched at 1020 ℃ and held for 60 min at −196 ℃ for 2 h and tempered at 200 ℃ for 120 min.
- Cr12MoV steel,
- heat treatment,
- cryogenic treatment,
- microstructure,
- hardness

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References(10)

References

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