| 摘要 |
PURPOSE:To prevent occurrence of peeling at a joining surface after heat treatment by interposing a copper alloy intermediate layer softer than a copper alloy member between a copper alloy member and steel member. CONSTITUTION:A 75 Cu-25 Zn plating layer 2 of 20mum thickness is formed on the surface of a steel member 1, placing a brazing filler metal 3 thereon and a copper alloy intermediate layer 4 of 0.5mm, this is sandwiched by Ag-W electrode to be pressed and energized. After joining the intermediate layer 4, a brazing filler metal 5 is placed on the intermediate layer 4, further a copper alloy sliding member 6 is placed thereon to be pressed and energized, obtaining the required joining member. As a result, as the copper alloy intermediate layer 4 of 0.2 proof stress of <30kgf/mm is sandwiched between a steel member 1 and copper alloy sliding member 6 of 0.2 proof stress >=30kgf/mm, after joining and heat treatment, peeling of the joined part does not cause. By this method, the occurrence of peeling at the joined surface after heat treatment is prevented. |
