Seamless Steel Pipe Cold Treatment Purpose and Method

Operation method: cool the quenched seamless steel pipe in low temperature medium (such as dry ice, liquid nitrogen) to - 60 to - 80 degrees or lower, with uniform temperature, and then return the temperature to room temperature.


Objective: 1. Transform all or most of the retained austenite in the quenched seamless steel pipe into martensite, so as to improve the hardness, strength, wear resistance and fatigue limit of seamless steel pipe;
2. Stabilize the steel structure to stabilize the shape and size of seamless steel pipe.


Application points: 1. After quenching, the seamless steel pipe shall be cold treated immediately, and then tempered at low temperature to eliminate the internal stress during low temperature cooling.
2. Cold treatment is mainly used for compact tools, measuring tools and compact parts made of alloy steel