DEVELOPMENT OF DISSIMILAR METAL TRANSITIO N JOINT BY HOT ROLL BONDINGTECHNIQUE

Metallurgically bonded transition joints which enable to connect repro cessing equipments made of superior corrosion resistant valve metals ( Ti-5Ta, Zr or Ti) with stainless steel piping is needed for nuclear fu el reprocessing plants. The authors have developed dissimilar metal tr ansition joints between stainless steel and Ti-5Ta, Zr or Ti with an i nsert metal of Ta by the hot roll bonding process, using the newly dev eloped mill called ''rotary reduction mill''. In the R & D program, ap propriate bonding conditions in the manufacturing process of the joint s were established. This report presents the structure of transition j oints and the manufacturing process by the hot roll bonding technique. Then, the evaluation of mechanical and corrosion properties and the r esults of demonstration test of joints for practical use are described .