Structure of steel Kh12MF after vacuum hardening
The vacuum hardening of steel Kh12MF components with neutral-gas cooling makes it possible to improve the quality of the surface and reduce deformation significantly.
As compared with the structure after oil quenching, the microstructure of steel Kh12MF after vacuum hardening with a neutral gas is distinguished by improved etchability of the austenitic-grain boundaries. This effect is associated with slow cooling in the austenitic temperature interval during hardening.
The effect of improved etchability of the grains disappears after complete melting of the residual austenite during high-temperature tempering.
KeywordsMicrostructure Austenite Temperature Interval Slow Cool Complete Melting
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