Hot-Compression Deformation Constitutive Equation of 60Si2CrVAT High-Strength Spring Steel

ZHOU Qiu-yue; WU Xiao-dong; LIANG Yu; XIE Jian-feng; WU Shun; ZOU Lei

doi:10.11973/jxgccl201704007

Materials and Mechanical Engineering > 2017 > 41(4): 29-32,57. > DOI: 10.11973/jxgccl201704007

ZHOU Qiu-yue, WU Xiao-dong, LIANG Yu, XIE Jian-feng, WU Shun, ZOU Lei. Hot-Compression Deformation Constitutive Equation of 60Si2CrVAT High-Strength Spring Steel[J]. Materials and Mechanical Engineering, 2017, 41(4): 29-32,57. DOI: 10.11973/jxgccl201704007

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Hot-Compression Deformation Constitutive Equation of 60Si2CrVAT High-Strength Spring Steel

School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

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Received Date: January 25, 2016
Revised Date: January 02, 2017

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The hot compression deformation of 60Si2CrVAT high-strength spring steel was carried out on thermo-simulation machine at different temperatures (900,950,1 050,1 150℃) and strain rates of 0.1-10 s^-1, the influences of deformation temperature and strain rate on hot deformation behavior of the steel were investigated. The hot-compression deformation constitutive equation of 60Si2CrVAT spring steel was established based on hyperbolic sine equations of Arrhenius type. The results show that the flow stress of the spring steel increased with the increase of deformation rate and decreased with the increase of deformation temperature, it was found that dynamic recrystallization was more likely to occur at high deformation temperature and low strain rate. And the activation energy was calculated to be 372 kJ ·mol^-1 when true strain was 0.2, the calculated flow stress well agreed with the experimental results and the average relative error between them was 4.89%.
- spring steel,
- hot compression deformation,
- flow stress,
- constitutive equation

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