1988 年 37 巻 417 号 p. 619-625
This paper summarized a study of X-ray stress measurement of stainless steel SUS410 brazed joints with two types of palladium containing filler metals, BPd-7 (5Pd-95Ag) and BPd-8 (18Pd-82Cu). The brazing was performed in a resistance heated vacuum furnace. The joint clearance of brazed joints ranged from 0.30 to 0.35mm. The brazing surfaces were polished by four types of emery papers, #80, #240, #400, and #1500, to clarify the effect of brazing surface roughness on the residual stress after brazing. The stress measurement of brazed joints was made in the longitudinal and transversal directions of the specimen by using the X-ray stress measurement technique (sin-squarepsi technique).
The residual stresses σxr and σyr were compressive at the brazed joints with BPd-7 and BPd-8, and the residual stresses of the brazed joint with BPd-8 were greater than those of the brazed joint with BPd-7. In the case of brazed joint with BPd-8, the rough brazing surface produced greater residual stresses than the smooth brazing surface.