| 摘要 |
PROBLEM TO BE SOLVED: To provide a diffusion-bonded member subjected to liquid phase diffusion bonding with an inexpensive insert material, and capable of obtaining the bonding strength equal to or above the strength of a base material, and to provide its production method. SOLUTION: Using an insert material made of copper, steels are subjected to diffusion bonding in such a manner that oxygen pressure P<SB>O</SB>(Pa) in an atmosphere lies in the range of numerical inequality(C); 1×10<SP>-3</SP><P<SB>O</SB><×10<SP>4</SP>, so as to produce the diffusion-bonded member in which, provided that the copper content (mass%) in the steels is defined as [Cu<SB>S</SB>], the oxygen concentration [O<SB>I</SB>](mass%) and the copper concentration [Cu<SB>I</SB>](mass%) in the bonding boundary in the steels satisfy numerical inequality (A); 0.1<[O<SB>I</SB>]<3, and numerical inequality (B); [Cu<SB>S</SB>]+0.05<[Cu<SB>I</SB>]<40, respectively. COPYRIGHT: (C)2008,JPO&INPIT |
