| 摘要 |
PURPOSE:To manufacture a Zr-base alloy member having high ductility and high corrosion resistance, by subjecting a Zr-base alloy containing Nb, Sn, Fe, and 0 to specific solution heat treatment, to cold working, and to specific aging treatment to form a specific metallic structure. CONSTITUTION:The Zr-base alloy material containing, by weight, 0.2-5.0% Nb, 0.5-3% Sn, 0.1-2.0% Fe, and 500-2,000ppm O is subjected to solution heat treatment by rapidly cooling from the temp. range of an (alpha+beta)- or alpha-phase. The material then is subjected to cold working at a draft of at least >=15% and to aging treatment at and above the recrystallization temp. in the alpha-phase temp. range. In this way, the material is formed into the metallic structure consisting of granular recrystallization structure and fine precipitates and free from residual structure of martensitic or Widmanstaetten state, so that Zr-base alloy member free of nodular corrosion and having high strength and high ductility can be obtained.
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