Study on Microstructure and Properties of Plasma Arc surfacing Layer for cutting Pick

摘要

Cutting tooth especially due to the poor quality of the shearer brazing, caused great pick consumption and delayed hours. The tooth body wear of the whole shearer picks accounts for half of its overall failure. In this experiment, the cutting pick joint which was welded by induction brazing was strengthened by plasma arc powder surfacing, then analyse the microstructure, surface topography, and mechanical property of the weld joint, so as to provide a new scheme for solving the tooth wear failure, and extending the service life. The pick failure problem caused by the lower hardness of the tooth tip, tooth wear, and the premature loss of hard alloy head.