Comparison of properties of W18Cr4V alloy steel in various quenching media after quenching

The hardness and micro - structures of W18Cr4V alloy steel in various quenching media after quenching were investigated by means of contrastive experiments. The obtained results showed that (1) the temperature differences between the axis and the surface of the cylinder were largest during water quenching, intermediate during oil quenching, and smaller during gas quenching; ( 2 ) the temperature gradient of work -pieces is smaller during gas quenching and it can be predicted that corresponding thermal strains and thermal stresses are also smaller than during water and oil quenching; (3 ) the gas quenching technology during small pressure can be realized for good quench -ability W18Cr4V alloy steel.