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METHOD FOR HOT-WORKING TINI-BASED SHAPE MEMORY ALLOY
METHOD FOR HOT-WORKING TINI-BASED SHAPE MEMORY ALLOY
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机译：热工基于TINI的形状记忆合金的方法
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摘要
PURPOSE:To hot-work a TiNi-based shape memory alloy at a higher temp. than before and to improve the productivity by previously forming an atmospheric oxidation preventing layer on the surface of the alloy, and then hot- working the alloy in a specified temp. range. CONSTITUTION:When a TiNi-based shape memory alloy is hot-worked, an atmospheric oxidation preventing layer is previously formed on the alloy surface, and the alloy is hot-worked at a temp. higher than 900 deg.C and lower than the eutectic temp. which is on the Ti-richer side than the TiNi intermetallic compd. layer. Ni, Ni-based alloys, various stainless steels, Mo, Mo alloys, etc., are used as a metal having excellent oxidation resistance. The preventing layer is formed by covering the base metal with a sheet, thermal spraying, dipping the base metal in a melt, etc. As a result, the alloy can be hot-worked at =900 deg.C, and the productivity in hot working is improved.
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