Abstract
Hardenabilities of 17 self-hardening steels were investigated with reference to the relation of hardness vs. "half-temperature time". Mass effects of these steels were deduced from the grossmann's diagram, and the results showed good coincidence with experimental values. Due to the above investigation, it became obvious that there was a considerable difference ameng hardenabilities of various self-hardening steels.
Further, the authors referred to the secondary hardening characteristics of these steels due to tempering after slack quenching at various cooling rates. As the results, bainite seemed to be stable for temper-softening and qualifiedfor the transformation and precipitation which led to a secondary hardening.
