Investigation on Microstructure and Properties of Low‐Carbon Wear‐Resistant Steels with Addition of Cr and Ni

Abstract

The investigations on wear resistance, mechanical properties, and microstructure of three steels with different additions of chromium (Cr) and nickel (Ni) are conducted. Continuous cooling treatment is conducted to obtain martensitic/bainitic dual‐phase microstructure, and wear behavior is analyzed. The results indicate that Ni addition has no significant influence on the strength, hardness, and elongation but improves the low‐temperature impact toughness and reduces the weight loss due to the decrease in spalling wear. In addition, composite addition of Cr and Ni enhances strength, hardness, and elongation but decreases low‐temperature impact toughness. Although the weight loss of sample with the composite addition of Cr and Ni is small in the early stage of wear, the lower impact toughness results in the increase in chiseling wear, and the wear rate increases in the later stage of wear.