| 摘要 |
[PROBLEMS] To provide a process for producing a lightweight race ring through steady unification, without any deformation, of an aluminum alloy member for constituting a main body of race ring and an iron base alloy member for constituting a raceway surface thereof. [MEANS FOR SOLVING PROBLEMS] Outer ring ( 41 ) of cross roller bearing is a composite part comprised of outer ring main body member ( 411 ) of aluminum alloy and, bonded to the inside thereof, outer ring side raceway surface constituting member ( 412 ) of iron base alloy. Layer of A7075 type alloy powder ( 413 ) is interposed between diffusion bonding face ( 411 a) of outer ring main body member ( 411 ) and diffusion bonding face ( 412 a) of outer ring side raceway surface constituting member ( 412 ) (step ST 3 ), and diffusion bonding of the members ( 411, 412 ) is carried out (step ST4). It has been ascertained that the members ( 411, 412 ) can be strongly bonded and unified together by interposing the layer of alloy powder ( 413 ) even at bonding temperature lower than in the prior art. Thus, the diffusion bonding can be accomplished without any deformation of the outer ring main body member ( 411 ) of aluminum alloy.
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