The refractory metals below are groups of metal
compositions whose elements consist basically of the
refractory metals tungsten, molybdenum and tungsten
carbide combined with copper. Combinations of these
elements produce dense, hard metals of superior wear
resistance and strength at elevated temperatures,
coupled with good thermal and electrical conductivity.
The mechanical and physical properties of these materials
make them particularly suitable as the die inserts and
facings for volume projection welding, flash and butt
welding, electrical upsetting, electroforging and mash
welding applications.
These materials are also used successfully as facing on
spot welding electrodes where heat balance or mechanical
wear resistance are required. The initial premium cost of
these refractory metals is offset by lower production cost
per weld due to long tool life and less electrode dressing
time. the high stability of these materials insures uniform
heating and prevents misalignment, resulting in a higher
quality weld.