The Microstructure And Forming Mechanism Of Brazing Interface Of TiAl Alloy To Steel 42CrMo

In this paper, the vacuum brazing of the TiAl compound and 42CrMo steel was studied. Then the joint microstructure of TiAl/ B-Ag72Cu /42CrMo was analyzed. The results of vacuum brazing of the TiAl compound and 42CrMo steel show that when the brazing temperature is under 830癈, no icompound is formed at the boundary on the 42CrMo side; but when brazing temperature over 830癈, a narrow compound layer is found at the same place. While on the TiAl side, there is Al-Cu-Ti intermetallic compound at any brazing temperature; The forming and growth mechanism of brazing interface is outlined.