チタン/銅系合金複合材の熱間静水圧押出し(<小特集>高圧力小特集)

概要

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A new hot hydrostatic extrusion process with a visco-plastic pressure medium instead of liquid was development. A lump of visco-plastic material is introduced into a container just after changing a pre-heated billet, and extrusion is immediately performed. Therefore, the temperature drop of billet is minimized, and at the same time a steady hot extrusion is realized. With this process, co-extrusions of commercially pure titanium and copper ally were conducted. And favorable extrusion conditions were determined for sound composite bars. For the co-extrusions should be used to obtain an uniform deformation. An intermetallic compound was sometimes observed at the interface between titanium and copper alloy when the extrusion temperature was high, or the annealing temperature after extrusion was high. Under a good process condition, no intermetallic compound was observed and the bonding shear strength was as high as 120〜150 MN/m^2 for the case of a titanium clad copper electrode.
社団法人日本材料学会の論文
1988-02-15