Mechanical parts with hardfacing welding material and overlay welding layer by it

摘要

PROBLEM TO BE SOLVED: To provide a Co-based alloy hardfacing welding material by a plasma powder welding method with high productivity, the material capable of forming a hardfacing welding layer having high hardness and small variations and exhibiting superior wear resistance, and also having superior weldability and machinability of the hardfacing welding layer.;SOLUTION: A Co-based alloy composition contains 0.6-1.0 mass% of C, 2.0-5.0 mass% of Si, 0.5-1.0 mass% in total of at least one selected from W, Nb, and Ti, 16.0-20.0 mass% of Cr, 20.0-35.0 mass% of Mo, 2.0 mass% or less of Ni, and 2.0 mass% or less of Fe, wherein the remainder is substantially Co.;COPYRIGHT: (C)2013,JPO&INPIT