| 摘要 |
The present invention relates to a method of manufacturing a clad bar and is basically characterized in that a columnar core member is fitted in a cylindrical outside layer member and the resulting assembly is heated, and then the heated assembly is rolled by a rotary mill provided with three or more cone type rolls to integrate the core member and the outside layer member by diffusion bending. The method is additionally characterized in that, in order to prevent unnecessary substances, such as oxides, from being formed on an interface between the core member and the outside layer member, the assembly is sealed at both ends thereof under reduced pressure or under vacuum or the assembly is cold drawn, the assembly thus welded or cold drawn is then heated and subsequently rolled by a rotary mill. Thus, an intermetallic compound layer formed between the core member and the outside layer member can be thinned, whereby improving bond strength.
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