DIFFUSION JOINING METAL CARRIER AND METHOD OF MANUFACTURING IT

摘要

A diffusion joining metal carrier formed by assembling a honeycomb body, constituted by alternately rolling or laminating wavy foil strips made of heat-resisting stainless steel containing aluminum and flat foil strips made of stainless steel, into a metal outer tube and integrating the assembly by diffusion joining, wherein the surface roughness of the foil strips after the diffusion joining is 0.001 to 2.0 mu m in terms of center line average roughness Ra and opposite ends in the lengthwise direction of the diffusion joint portion are free from sintering bridge. A method of manufacturing the metal carrier within a condition range in which lambda b represented by lambda b=6.8x10<-12>x delta f<-1>xF<1/2>xRa<-1/2>xT<1/4>xexp(15000/T)xb<1/2> is not less than 8 and not more than 20 under the condition, 7.52x10<9>xexp(-35000/T)>/=8xPout, provided that a foil thickness is delta f(m), average foil surface roughness Ra(m), back tension when rolled up F(kgf), contact width between flat foil and wavy foil b(m), heat treating temperature T(K) and vacuum degree Pout (Pa).