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一、前言自从1919年法国科学家Guillaume发明第一种恒弹性合金(Fe—36Ni—12Cr)、1927年Chevenard制成世界上第一种有实用价值的恒弹性合金(命名为elinvar)以来已有60余年的历史。目前,技术上使用的恒弹性合金主要是Fe—Ni—Cr系铁磁性合金,有炭化物强化型和时效硬化型两类,其中以1946年美国H.A.Wilson公司发明的Ni—SpanC合金以及以此为基础发展起来的合金应用最广泛。此外,铁磁性恒弹性合金还有Fe—Co、Fe—Pd、Fe—Pt等系列。Fe—Co系Co—elinvar合金是日本的增本量等人在1940年发明的,只在日本得到较多的应用;而Fe—Pd、Fe—Pt系合金由于工艺性差,热弹性系数较大(只能
I. Introduction Since French scientist Guillaume invented the first permanent elastic alloy (Fe-36Ni-12Cr) in 1919 and Chevenard made the world’s first permanent elastic alloy (named as elinvar) in 1927 with the value of 60 Years of history. At present, the technically used permanent elastic alloy is mainly Fe-Ni-Cr ferromagnetic alloy, there are two types of hardening and aging hardening type, which the United States in 1946 HAWilson company invented Ni-SpanC alloy and as The basis for the development of the most widely used alloy. In addition, the ferromagnetic constant elastic alloy Fe-Co, Fe-Pd, Fe-Pt and other series. Fe-Co-based Co-elinvar alloy is Japan’s incremental volume and others invented in 1940, only in Japan get more applications; and Fe-Pd, Fe-Pt alloys due to poor workmanship, thermal coefficient of elasticity larger (Only