Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

Abstract EN

The microstructure and wear resistance of Stellite 6 alloy hardfacing layer at two different temperatures (room temperature and 300°C) were investigated by plasma arc surfacing processes on Q235 Steel.

Tribological test was conducted to characterize the wear property.

The microstructure of Stellite 6 alloy coating mainly consists of α-Co and (Cr, Fe)7C3 phases.

The friction coefficient of Stellite 6 alloys fluctuates slightly under different loads at 300°C.

The oxide layer is formed on the coating surface and serves as a special lubricant during the wear test.

Abrasive wear is the dominant mechanism at room temperature, and microploughing and plasticity are the key wear mechanisms at 300°C.