Effects of Heat Treatment and Tracer Element Impurities on the Impact Properties of the 12Cr Steels

摘要

The addition of sulfur up to 0.05% embrittles HT-9 steels by decreasing the upper shelf energy. Sulfur has little or no effect on the DBTT. The addition of up to 0.05% phosphorous decreases the upper shelf energy but has no effect on the DBTT. The addition of copper up to 0.15% decreases the upper shelf energy but has no effect on the DBTT. Effects of heat treatment on microstructure and ductile-brittle transition temperature of HT-9 were also investigated. (ERA citation 10:025805)