ALLOY STEEL FOR LOW TEMPERATURE VACUUM CARBURIZING

摘要

PURPOSE: An alloy steel for low temperature vacuum cementation is provided to improve the improvement effect of thermal transformation according to thermal process of annulus gear. CONSTITUTION: An alloy steel for low temperature vacuum cementation comprises C 0.17~0.24 weight%, Cr 0.8~1.2 weight%, Mn 0.4~0.8 weight%, Si 0.80~1.20 weight%, P less than 0.020 weight%, and remainder Fe. Vehicle transmission gears are processed under cementation quenching heat-treatment.