Dissolution and Deposit of Base Metal in Brazing to Dissimilar Materials and its Application (Part 3)

Copper Brazing to Iron and Molybdenum or Tungsten

Abstract

In copper brazing to iron and molybdenum or tungsten, iron base metal dissolves into molten copper filler metal and the plate-like deposit of the iron develops from molybdenum or tungsten base metal to iron one at a constant brazing temperature.
Simultaneously, the diffusion layer consisting of intermetallic compound Fe₇Mo₆ or Fe₇W₆ also develops into molybdenum or tungsten base metal and may deteriorate the mechanical properties of the joint.