Effect of tempering temperature on the mechanical properties and microstructures of 1500 MPa hot stamping steel after quenching

Wang Zijian; Huang Wei; Peng Ze; Liang Xiao; Deng Jianlin

doi:10.7513/j.issn.1004-7638.2024.06.023

Volume 45 Issue 6

Dec. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(6): 172-176

Wang Zijian, Huang Wei, Peng Ze, Liang Xiao, Deng Jianlin. Effect of tempering temperature on the mechanical properties and microstructures of 1500 MPa hot stamping steel after quenching[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 172-176. doi: 10.7513/j.issn.1004-7638.2024.06.023

Citation:

Wang Zijian, Huang Wei, Peng Ze, Liang Xiao, Deng Jianlin. Effect of tempering temperature on the mechanical properties and microstructures of 1500 MPa hot stamping steel after quenching[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 172-176. doi: 10.7513/j.issn.1004-7638.2024.06.023

Citation:

Wang Zijian, Huang Wei, Peng Ze, Liang Xiao, Deng Jianlin. Effect of tempering temperature on the mechanical properties and microstructures of 1500 MPa hot stamping steel after quenching[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 172-176. doi: 10.7513/j.issn.1004-7638.2024.06.023

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Effect of tempering temperature on the mechanical properties and microstructures of 1500 MPa hot stamping steel after quenching

doi: 10.7513/j.issn.1004-7638.2024.06.023

Wang Zijian^{1, 2
,},
Huang Wei^{1
,
,},
Peng Ze¹,
Liang Xiao¹,
Deng Jianlin¹

1.
Jiangxi Hot Stamping Automotive Component Co., Ltd., Jiujiang 332400, Jiangxi, China
2.
Sochoow University, Suzhou 215031, Jiangsu, China

Received Date: 2023-12-26
Available Online: 2024-12-30
Publish Date: 2024-12-30

Abstract

Abstract

Quenching and tempering treatment were carried out on a 1 500 MPa hot formed steel, and the effects of tempering temperature on the microstructures and mechanical properties were studied using methods such as metallographic microscopy, room temperature tensile testing, and scanning electron microscopy. The results show that if the Cr content is too high, it will reduce the activity of C and inhibit the formation of carbides. Therefore, the main carbides in the steel are M23C6 and M7C3. As the tempering temperature increases to around 400 ℃, the carbides will transform from M23C6 to M7C3, and the tensile strength, yield strength, and hardness will gradually decrease with the increase of tempering temperature. When the tempering temperature exceeds 400 ℃, the strength will significantly decrease, the elongation will gradually increase by enhancing tempering temperatures. The strength plastic product will first increase and then decrease with the increase of tempering temperature. The high-density dislocations in Flat noodles martensite will decrease, and the martensite will engulf and merge with each other, and then gradually blur with the increase of tempering temperature. Ferrites appear in the matrix. In addition, carbides will also precipitate and grow up.
- 1 500 MPa hot stamping steel,
- tempering,
- carbides,
- martensitic flat noodles

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References(13)

References

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