Original paper(Vol.46 No.8 pp.919)
Development of dissimilar metal transition joint by hot bond rolling
Kurokawa Hiroyuki; Nakasuji Kazuyuki; Kajimura Haruhiko; Nagai Takayuki; Takeda Seiichiro
Abstract:Metallurgically bonded transition joints which enable to connect reprocessing equipments made of superior corrosion resistant valve metals (Ti 5Ta, Zr or Ti) to stainless steel piping are required for nuclear fuel reprocessing plants. The authors have developed dissimilar transition joints made of stainless steel and Ti 5Ta, Zr or Ti with an insert metal of Ta by the hot bond rolling process of clad bars and clad pipes, using a newly developed mill called 'rotary reduction mill'.
This report presents the manufacturing process of dissimilar transition joints produced from the clad pipe with three layers by the hot bond rolling. First, the method of hot bond rolling of clad pipe is proposed. Then, the mechanical and corrosion properties of the dissimilar transition joints are evaluated in detail by carrying out various tests. Finally, the rolling properties in the clad pipe method are discussed.
Key Words:fuel reprocessing, stainless steels, titanium-tantalum alloy, zirconium, tantalum, dissimilar metal transition joints, hot bond rolling, mechanical properties, corrosion resistance, rotary