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    • 13. 发明授权
    • Process for improving the ductility of a product of alloy involving
martensitic transformation and use thereof
    • 涉及马氏体转化合金产品的延展性的改进方法及其应用
    • US4878954A
    • 1989-11-07
    • US208035
    • 1988-06-17
    • Alain DubertretBernard Prandi
    • Alain DubertretBernard Prandi
    • C21D8/00C21D6/00C22F1/00C22F1/08C22F1/10
    • C22F1/006
    • A process is disclosed for improving the ductility of shape-memory alloy products based on Ti-Ni involving martensitic transformation. The process comprises at least one thermal treatment cycle of alternating hot and cold treatment, wherein the first thermal treatment cycle comprises a cold treatment at a temperature both lower than -50.degree. C. and lower than M.sub.s -50.degree. C., where M.sub.s is the temperature at which martensitic transformation of the product begins, and a hot treatment of the product at a temperature of 700.degree. to 900.degree. C. Each optional subsequent thermal treatment cycle comprises a cold treatment of the product at a temperature both lower than -50.degree. C. and lower than M.sub.s -30.degree. C., and a hot treatment of the product at a temperature of 600.degree. to 900.degree. C.
    • 公开了一种用于改善基于涉及马氏体转变的Ti-Ni的形状记忆合金产品的延展性的方法。 该方法包括至少一个交替冷热处理的热处理循环,其中第一热处理循环包括在低于-50℃且低于Ms-50℃的温度下的冷处理,其中Ms是 开始产品的马氏体转变的温度,以及在700℃至900℃的温度下对产物进行热处理。每个任选的后续热处理循环包括在低于-50℃的温度下对产物进行冷处理 ℃,低于Ms-30℃,在600〜900℃的温度下对产物进行热处理。