Incomplete quenching heat treatment processing

Incomplete quenching refers to the heat treatment process of heating hypereutectoid (and eutectoid) steel to a temperature between Ac1 and Acm, followed by rapid cooling after insulation (see Figure 2-2). Mainly suitable for non alloy tool steel and low alloy tool steel.
Advantages of incomplete quenching of hypereutectoid steel:
① Quenching heating
The low temperature retains a certain amount of undissolved granular carbides, which gives the steel high hardness and wear resistance after quenching;
② Low heating temperature, fine austenite grains, and better mechanical properties can be obtained after quenching;
③ The tendency for oxidation, decarburization, distortion, and cracking is small.