METHOD FOR SECONDARY HARDNESS THERMAL TREATMENT OF HIGH-CHROMIUM TOOL STEEL

摘要

FIELD: metallurgy. SUBSTANCE: method involves providing initial steel quenching at temperature of 1,070-1,080 C with following intermediate tempering at temperature of 400-420 C for 1 hour and final multiple tempering at temperature of 520-540 C, in particular, triple tempering for 1 hour each tempering cycle. Method is used for processing of high-chromium steel for manufacture of tools and parts of machines. EFFECT: increased service life of tools manufactured from such steel due to increased secondary hardness and strength. 2 cl, 1 tbl