| 摘要 |
PURPOSE:To produce a composite material having a high rate of joining by subjecting either one or both of the joint surfaces of a base metal such as iron and a cladding metal consisting a metallic material to nickel plating and brazing the joint surfaces by copper, etc. as a brazing material then rolling the joined material at the m.p. of the brazing material or below. CONSTITUTION:Either one or both joint surfaces of a base metal such as a iron or iron alloy and a cladding metal consisting of a metallic material are subjected to nickel plating. A brazing material consisting of copper having the m.p. lower than the m.p. of the cladding metal or a copper alloy such as Cu-Mn alloy or the like is sandwiched between the base metal and the cladding metal in such a way that the above-mentioned plating layer contacts with the brazing material and these metals are heated at the temp. between the m.p. of said brazing material and the base metal and higher than 1,050 deg.C, by which the metals are brazed. The slab obtd. in such a way is rolled at the m.p. of the above-mentioned brazing material or below to prevent intrusion of the copper into the grain boundary and enriching of the iron in the weld zone. The composite member which can prevent the cracking in the stage of executing welding and the decrease in resistance to fatigue during use and has a high joining rate is obtd. |
