Explanation

unfull quenching refers to the heat treatment process in which hypereutectoid (and eutectoid) steel is heated to the temperature between Ac1 and Acm, and then rapidly cooled after holding. If complete quenching (heating temperature higher than Acm point) is adopted for over eutectoid steel, the amount of carbide dissolved into austenite will increase, the homogenization degree of austenite will increase, and the grain will be coarsened. After quenching, the hardness, wear resistance and mechanical properties of steel will be reduced while oxidation, decarburization, deformation and cracking tendency will be increased. unfull quenching is mainly applicable to carbon tool steel and low alloy tool steel.

Classification