Study on microalloying and heat treatment process of spring steel 55SiCrV

Meng Jian

doi:10.7513/j.issn.1004-7638.2021.03.028

Volume 42 Issue 3

Jun. 2021

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Meng Jian. Study on microalloying and heat treatment process of spring steel 55SiCrV[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 187-192. doi: 10.7513/j.issn.1004-7638.2021.03.028

Citation:

Meng Jian. Study on microalloying and heat treatment process of spring steel 55SiCrV[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 187-192. doi: 10.7513/j.issn.1004-7638.2021.03.028

Meng Jian. Study on microalloying and heat treatment process of spring steel 55SiCrV[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 187-192. doi: 10.7513/j.issn.1004-7638.2021.03.028

Citation:

Meng Jian. Study on microalloying and heat treatment process of spring steel 55SiCrV[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(3): 187-192. doi: 10.7513/j.issn.1004-7638.2021.03.028

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Study on microalloying and heat treatment process of spring steel 55SiCrV

doi: 10.7513/j.issn.1004-7638.2021.03.028

Meng Jian^{1, 2}

1.
Liuzhou Vocational & Technical College, School of Mechanical and Electrical Engineering, Liuzhou 545006, Guangxi, China
2.
Technology Center of Liuzhou Steel Group, Liuzhou 545000, Guangxi, China

Received Date: 2020-05-20
Publish Date: 2021-06-10

Abstract

Abstract

In this paper 55SiCrV steel was obtained by V microalloying based on the composition of 55SiCr spring steel, the effect of heat treatment on the microstructure and mechanical properties of 55SiCrV was studied by means of orthogonal test of quenching and tempering, microstructure observation, mechanical properties test and X-ray diffraction. The experimental results show that there are a large number of 10 ~ 35 nm vanadium containing precipitates in the microstructure of 55SiCrV (0.20% V), and the corresponding strengthening effect is the best. Quenching and tempering processes can change the microstructure proportion of 55SiCrV, in which retained austenite can reduce the strength and increase the plasticity, the best matching of mechanical properties (R_m=1 815 MPa, Z=28%) of 55SiCrV is obtained by following process combination o f quenching at 900 ℃ and tempering at 430 ℃, and the content of resulted retained austenite is 2.3%.
- spring steel,
- 55SiCrV,
- microalloying,
- quenching,
- tempering,
- mechanical properties

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References(10)

References

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