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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
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Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 12 Issue 4
Aug.  2021
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CHEN Zhiqiang, LIN Yinhe, PU Chunlei, TIAN Ye, YIN Guoliang, ZHAO Guizhou. Study on the mechanism of the effect of heat treatment on the mechanical properties of typical low alloy steel bars[J]. Nonferrous Metals Science and Engineering, 2021, 12(4): 51-57. DOI: 10.13264/j.cnki.ysjskx.2021.04.007
Citation: CHEN Zhiqiang, LIN Yinhe, PU Chunlei, TIAN Ye, YIN Guoliang, ZHAO Guizhou. Study on the mechanism of the effect of heat treatment on the mechanical properties of typical low alloy steel bars[J]. Nonferrous Metals Science and Engineering, 2021, 12(4): 51-57. DOI: 10.13264/j.cnki.ysjskx.2021.04.007
shu

Study on the mechanism of the effect of heat treatment on the mechanical properties of typical low alloy steel bars

  • 1.

    MCC Huatian Engineering & Technology Corporation, Nanjing 210019, China

  • 2.

    International Research Institute of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China

  • 3.

    Materials and Chemical Engineering College, Yibin University, Yibin 644007, Sichuan, China

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  • Received Date: March 21, 2021
  • Published Date: August 30, 2021
    Graphical Abstract
    • Abstract
  • On-line quenching and tempering heat treatment of bars can not only significantly reduce costs, but also help improve material properties. Laboratory tests, organization performance testing and finite element simulation were performed on typical 45# steel and 40Cr steel. The results show that the depth of the hardened layer of 45# steel and 40Cr steel is about 4.8 and 18 mm, respectively, and the critical cooling rate is about 72, 16 ℃/s. After high temperature tempering and holding at 600 ℃ for 20 minutes, the carbides in the steel are distributed uniformly. Strong plasticity and uniformity along the cross section have been significantly improved. The finite element simulation shows that the thermal stress changes in the quenching: the surface layer is first pulled and then pressed, while the core is the opposite.
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    • References (24)
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