Open AccessEvaluation of WC-Co-Cr3C2 Hard Materials for Friction Stir Welding Tool Application via Spark Plasma Sintering Process
Author(s) -
Jeong-Han Lee,
Hyun-Kuk Park
Publication year - 2021
Publication title -
journal of welding and joining
Language(s) - English
Resource type - Journals
eISSN - 2466-2232
pISSN - 2466-2100
DOI - 10.5781/jwj.2021.39.5.7
Subject(s) - spark plasma sintering , materials science , microstructure , grain size , metallurgy , ball mill , sintering , relative density , carbide , composite material
Horizontal ball-milled WC-Co, WC-Co-Cr3C2 powders, and spark plasma sintering (SPS) were used to densify WC-6 wt.%Co, WC-6 wt.%Co-1 wt.% Cr3C2 and WC-6 wt.%Co-2.5 wt.% Cr3C2 hard materials in this study. Each of the SPSed WC-6 wt.%Co-1 wt.% Cr3C2 and WC-6 wt.%Co-2.5 wt.% Cr3C2 hard materials were almost completely dense with a relative density up to 99.5 % after the simultaneous application of a pressure of 60 MPa at 1300℃, almost without significant change in the grain size. The average grain size of WC for WC-6 wt.%Co-1 wt.% Cr3C2 and WC-6 wt.%Co-2.5 wt.% Cr3C2 hard materials was about 0.435, 0.581 and 0.743 ㎛, respectively. Mechanical properties, microstructure, and phase analysis of SPSed WC-6 wt.%Co, WC-6 wt.%Co-1 wt.% Cr3C2 and WC-6 wt.%Co-2.5 wt.% Cr3C2 hard materials were investigated.