The quenching of elbow is one of the important factors affecting the quality of elbow after forming.Mastering this heat treatment process plays a decisive role in the overall quality of elbow.
 

Elbow quenching is to heat the elbow to the critical temperature above, maintain for a period of time, and then quickly put into the quenching medium, so that its temperature suddenly drops, the rate of rapid cooling is greater than the critical cooling rate, so as to obtain martensite dominated by unbalanced organization.Quenching can increase the strength and hardness of steel, but reduce its plasticity.Commonly used quenching agents include water, oil, alkaline water and salt solution.