Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (12): 153-159.DOI: 10.13251/j.issn.0254-6051.2023.12.026

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of shot peening process on surface properties and wear behavior of 4Cr5Mo2V steel

Niu Tong1,2, Wang Xinyu1,2, Wu Xiaochun1,2,3   

  1. 1. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China;
    2. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    3. Shangda Xinlun Material and Technology Co., Ltd., Zhaoqing Guangdong 526105, China
  • Received:2023-07-11 Revised:2023-10-26 Online:2023-12-25 Published:2024-01-29

Abstract: Effects of different shot peening processes on the surface morphologies and microstructure, mechanical properties, and friction and wear behavior of 4Cr5Mo2V hot work die steel were investigated by using white light interferometer, scanning electron microscope (SEM), X-ray diffractometer (XRD) and residual stress meter. The results show that after carried out 0.4 mmA + 0.2 mmA + 0.1 mmA compound shot peening treatment, the specimen has the strongest strengthening effect, under dislocation strengthening and fine grain strengthening, the surface hardness of the specimen increases from 520 HV0.1 to 601 HV0.1, the peak of the residual stress is -1141 MPa, higher hardness and residual stress could improve the material resistance to adhesion and friction and wear, so that the wear resistance of the material is greatly improved, and the wear rate is reduced by 60.7%. Therefore, this process shall be the best shot peening process.

Key words: shot peening process, 4Cr5Mo2V steel, friction and wear, shot peening strengthening

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