Study on the evolution law of surface decarburization of Cr-Mo-V cold heading steel

Chen Jilin; Ma Honglei; Huo Liwei; Yan Cong; Zhang Kunyao

doi:10.7513/j.issn.1004-7638.2022.06.023

Volume 43 Issue 6

Jan. 2023

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Chen Jilin, Ma Honglei, Huo Liwei, Yan Cong, Zhang Kunyao. Study on the evolution law of surface decarburization of Cr-Mo-V cold heading steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 153-160. doi: 10.7513/j.issn.1004-7638.2022.06.023

Citation:

Chen Jilin, Ma Honglei, Huo Liwei, Yan Cong, Zhang Kunyao. Study on the evolution law of surface decarburization of Cr-Mo-V cold heading steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 153-160. doi: 10.7513/j.issn.1004-7638.2022.06.023

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Study on the evolution law of surface decarburization of Cr-Mo-V cold heading steel

doi: 10.7513/j.issn.1004-7638.2022.06.023

1.
Central Iron and Steel Research Institute, Beijing 100081, China
2.
Xingtai Iron and Steel Co., Ltd., Xingtai 054027, Hebei, China

Received Date: 2022-06-26
Publish Date: 2023-01-13

Abstract

Abstract

The effects of heating temperature, heating time, and surface treatment on the depth of decarburized layer and microstructure of cold heading 40CrMoV steel were studied, and the evolution mechanism of surface decarburization with temperature was analyzed. The results show that when the cold heading 40CrMoV steel is heated at 700-1100 ℃, the total decarburized layer depth increases gradually with the increase in temperature. 750-850 ℃ is the sensitive temperature range for forming a complete decarburized layer, and it reaches its peak value at 800 ℃. With the extension of holding time, the depth of the decarburized layer is further deepened. Additionally, after surface turning treatment, the total decarburized layer is reduced by 50%, and the complete decarburized layer deteriorates. As a summary, the control of surface decarburization of cold heading 40CrMoV steel in industrial production is proposed.
- cold heading steel,
- 40CrMoV,
- decarburization,
- microstructure,
- fatigue fracture

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References(17)

References

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