In order to electrically after the quenching and tempering of the main optical axis bearing whole nominal residual greater compressive stress, can be passed into carburization or nitriding atmosphere during quenching, stop long time nominal carburizing or nitriding. Austenite with high carbon or nitrogen, Ms increased attack surface compared to the inner and center quenching martensite change, the occurrence of a large residual compressive stress. GCrl5 steel to carburizing atmosphere, and non-carburizing atmosphere heating quenching (tempering) resolved, contact fatigue experiments can be seen, the nominal carburizing carburizing outlived not progress 1.5 times. May adopt unwrought the intermittent fever shortcut annealing, a loss of fine granular pearlite institutions, in order to protect the the coarse carbide steel and well-balanced spread. Quenching austenitizing, the original body of this form unless dissolved in austenite carbide undissolved carbides together into a fine granular. Its origins on behalf of the whole of carburized deposit is larger residual compressive stress.

When the origin of the steel in the original body will certainly quenched martensite carbon content (i.e. quenching heated austenite carbon content), the amount of retained austenite and the amount of undissolved carbides secondary quenching measurements and maintain efforts with the quenching measure to improve efforts will certainly steel undissolved carbides units reduced (quenched martensite carbon content to improve), residual austenite units fill, the angle of the first with the improvement of quenching measure added , reaches a peak and then rises with decreasing metric. When coarse carbides in the original agency, due to carbide easy integration into the austenite, so that the angle after quenching peak toward higher temperature and emergence of the the are shorter austenitic Chemical husband. When quenching measure will certainly as austenitic Chemical husband extension, undissolved carbides units narrowing the retained austenite units fill, angle to improve work longer, this trend slowed. (4) manufacturing electrical main optical axis bearing the whole steel to request deposit is higher filthy degrees, secondary narrow content of O2, N2, P, oxides and phosphides.