MAKING METHOD OF W-CU ALLOY

摘要

This W-Cu alloy is produced by the processes of (1) infiltration of copper in tungsten frame, repeatedly, (2) rapid heating of infiltrated W-Cu alloy at higher 1150deg.C than melting temperature 1083deg.C of copper for the holding time of over 5min, and (3) rapid cooling up to 800deg.C, for decreasing direct contact between tungsten particles, removing the residual porosity and homogenizing micro structure by contraction and expansion. This alloy comprises 65 to 85wt.% Cu and the balance of tungsten frame. The copper as the starting material is the powder of electrolytic copper of higher oxygen content or the ingot of oxygen-free copper of lower oxygen content.