Studies on Workability, Heat Treatment Characteristics and Corrosion Resistance for Pressurized Water of Zr-l%Mo-l%Cr and Zr-l%Mo-l%Ni Alloys

摘要

The workability, the effect of the heat treatment on the mechanical properties and the micro-structures, and the corrosion resistance for pressurized water of Zr-l％Mo-l％Cr and Zr-l％Mo-l％Ni alloys which resulted from previous works have been investigated in comparison with Zircaloy-2. The results obtained are summarized as follows. (l) The percent reductions of the alloys drop-forge-d in the temperature range of 600° — 900 °C were nearly same as those of Zircaloy-2. The alloys were cold rolled by 70％ without any intermediate annealing. (2) The remarkable hardening occurred in both alloys when they were quenched from (3 phase. (3) The optimum procedures of the heat treatment to obtain the favourable mechanical properties of Zr-l％Mo-l％Cr and Zr-l％Mo-l％Ni alloys were to temper them at 750°C and 600°C for 100 min respectively, after quenching from 950° C in β phase.