高温熱交換器の耐熱ろう付方法の研究

抄録

The tensile test results show that the joint brazed by the Ni-Cr-B alloy has the highest strength among the other alloys tested. The effect of the brazing clearance, the surface roughness and the base metal are described. Failure of the brazed joint occurred at the midplane of its brazing layer in all cases tested. The EPMA has characterized the composition in the brazing layer. A massive distribution of the element Ni found in the central portion of the brazing layer relates to the failure mode.