BRAZING METHOD BETWEEN TITANIUM ALLOY AND STAINLESS STEEL

摘要

The present invention relates to a brazing method for bonding dissimilar materials such as a titanium alloy and a stainless steel comprising: a step (a) for heating a Ni-based filler metal at 25-100°C which is over a melting point of the Ni-based filler metal after arranging the Ni-based filler metal on a binding part of a titanium alloy and a stainless steel; a first maintaining step (b) for maintaining the Ni-based filler metal for a fixed hour at 25-100°C which is over a melting point of the Ni-based filler metal; and a step (c) for cooling the Ni-based filler metal, and comprising a second maintaining step for maintaining a fixed temperature in heating of the (a) step. Especially, a melting point can be lowered by alloying between Ni and a titanium alloy since a Ni-based filler metal is used. Therefore, since diffusion between a titanium alloy and a stainless steel is promoted, sound brazing bonding can be performed. [Reference numerals] (AA) Start; (BB) End; (S10) Assembling stage; (S11) Titanium alloy; (S12) Stainless steel; (S13) Filler metal; (S15) Arrange a binding part between a stainless steel and a titanium alloy of the filler metal; (S20) Heating stage; (S21) Start heating of the filler metal; (S22) Maintain the temperature of the filler metal during heating; (S23) Finish heating of the filler metal; (S30) Holding stage; (S31) Maintain the temperature of the filler metal after heating is finished; (S40) Cooling stage; (S41) Cool the filler metal