What is the quenching process for metal steel?

Operation method: Heat the steel to the phase transition temperature Ac3 or above Ac1, keep it for a period of time, and then quickly cool it in water, nitrate, oil, or air.

Purpose: metal quenching is generally to obtain high hardness martensite structure, sometimes when quenching some high alloy steels (such as stainless steel, wear-resistant steel), it is to obtain a single uniform austenite structure to improve wear resistance And corrosion resistance.

Application points:

1.Generally used for carbon steel and alloy steel with carbon content greater than 0.3%;

2.Quenching can give full play to the strength and wear resistance potential of steel, but at the same time it will cause great internal stress and reduce the plasticity and impact toughness of steel. Therefore, tempering is required to obtain better comprehensive mechanical properties.

Post-weld heat treatment is the heat treatment of the welded area or welded components after the steel workpiece is welded. The content includes: stress relief annealing, complete annealing, solid solution, normalizing, normalizing + tempering, quenching and tempering, precipitation heat treatment, etc. Generally speaking, post-weld heat treatment refers to stress relief annealing.