Microstructure and Properties of Fe-Based Coating after Tempering

作者：Wang, Sailong; Tao, Siyou; Sun, Shibao; Du, Xiaodong^*

来源：TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2022, 75(6): 1619-1627.

DOI：10.1007/s12666-022-02537-1

• Plasma spray coating
• Tempering temperature
• Friction and wear
• Electrochemical corrosion

By varying the tempering temperature, the effects of various tempering temperatures on the microstructure and properties of the coating were investigated. The results show that after heat treatment, eutectic carbides of the original coating disappear and spherical granular carbides resurface. The form and size of alloy carbide alter as the tempering temperature changes. The alloy carbide microstructure size is more rounded when the tempering temperature is 500 degrees C, and the average hardness is 658 HV, which is 4.9% greater than the original coating. The wear loss is least at a tempering temperature of 500 degrees C. The abrasion loss is 0.46 and 0.76 times that of the original coating when the load is 50 N and 75 N, respectively. The corrosion current density after tempering at 700 degrees C is the lowest in the electrochemical experiment, but the self-corrosion potential is the largest.