Fracture of Case-Hardened Steels.

摘要

Very often the fracture mode of case-hardened carburized steel is found to be intergranular. Thermal mechanical processing which upsets the continuous prior austenite grains tends to minimize the intergranular failure mode. In this paper a study of the fracture mode and surface chemistry of two case-hardened steels is made. These are the 1018 carbon steel, and 4340 low alloy steel. Of particular interest was to determine whether the intergranular fracture mode was related to the chemistry of the grain boundaries. (Author)