Effect of holding temperature on wear resistance and corrosion resistance of powder sherardized layer containing Mg

doi:10.13251/j.issn.0254-6051.2024.12.036

Abstract

Abstract: In order to investigate the effect of holding temperature on the properties of sherardized layer, sherardized layer containing Mg was prepared on the surface of Q345R steel by using powder sherardizing at three holding temperatures (410, 430 and 450 ℃). The thickness, elemental distribution, wear resistance and corrosion resistance of the sherardized layer were characterized by using analytical methods such as scanning electron microscope, wear tester and electrochemical workstation. The results show that a continuous sherardized layer can be formed when the holding temperature is between 410-450 ℃. The sherardized layer becomes thicker as the holding temperature increases and reaches the maximum thickness of 110 μm at 450 ℃. The wear resistance of the sherardized layer decreases with the increase of holding temperature, and the main wear mechanisms of the sherardized layer are abrasive, adhesive and oxidative wear. The corrosion resistance of the sherardized layer increases first and then decreases with the increase of holding time, and the sherardized layer has the best corrosion resistance when held at 430 ℃.

Key words: powder sherardized layer, holding temperature, wear resistance, corrosion resistance

CLC Number:

TG113.25

Gu Jian, Li Dongqing, Liu Shengchun, Qi Yi. Effect of holding temperature on wear resistance and corrosion resistance of powder sherardized layer containing Mg[J]. Heat Treatment of Metals, 2024, 49(12): 221-228.

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