Patent ID: 6298910
Filing Date: 2001-10-09
Classification: B23K,F16N,F28D,F28F

Abstract:
A heat exchanger comprising:a first plate made of aluminum material and having a first brazing filler metal layer on a first surface thereof and a first sacrifice layer on a second surface thereof, the first brazing filler metal layer having a melting point lower than that of the first plate, the first sacrifice layer having a corrosion resistance inferior to that of the first plate; anda second plate made of aluminum material and having a second brazing filler metal layer on a first surface thereof, and a second sacrifice layer on a second surface thereof, the second brazing filler metal layer having a melting point lower than that of the second plate, the second sacrifice layer having a corrosion resistance inferior to that of the second plate, wherein:the second plate is laminated with the first plate in a plate thickness direction of the first and second plates, and is brazed to the first plate at a joint portion to form a passage therebetween with the first sacrifice layer and the second sacrifice layer facing each other and defining the passage as passage walls; andthe second plate is plastically deformed such that the first brazing filler metal layer is laminated with the second sacrifice layer at the joint portion in the plate thickness direction of the first and second plates forming the passage.