抄録
The braze pressure welding (BPW) of the austenitic stainless pipe is conducted under the various joining condition with various filler metal; two Fe-based filler metals, four Ni-based filler metals and their mixture are used. With CR3B Fe-based filler metal, the metallographic observation and the elemental analysis reveal the formation of sound joint. This joint has the enough tensile strength demanded for the commercial standard. The distribution of Cr around the joint interface is not uniform, which might lower the corrosion resistance. The mixture of filler metals forms the residual layer in the joint interface which weakens the joint. The higher joining pressure and the uniformity of the temperature distribution around the joint interface contribute to the formation of sound joint. The usage of Fe-based filler metal with richer Cr and Mo as minor element and the higher joining pressure is considered to provide the better condition.
