The role classification of heat treatment for geological pipes

Heat the geological tube or steel to a suitable temperature above the critical point AC3 or ACM and hold it for a certain period of time, then cool it in the air. Function: Obtain a finer structure, often used to improve the machinability of the material.

Normalizing: Heating a geological pipe or steel part to an appropriate temperature above the critical point AC3 or ACM and holding it for a certain time before air cooling. Function: To obtain a finer structure, often used to improve the machinability of the material. Annealing: A heat treatment process in which a hypoeutectoid steel workpiece is heated to 20-40 degrees above AC3, held for a period of time, and then slowly cooled in the furnace (or buried in sand or lime and cooled) to below 500 degrees before air cooling.

　　Function: The purpose is to make the internal organization of the metal reach or approach an equilibrium state, obtain good process performance and use performance, or prepare the organization for further quenching. Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing processes,

　　Heat treatment generally does not change the shape or overall chemical composition of the workpiece, but by changing the microstructure inside the workpiece, or changing the chemical composition of the workpiece surface, it gives or improves the use performance of the workpiece. It refers to a steel part after quenching and hardening, then heating to a certain temperature below,

　　Then, the heat treatment process is cooled to room temperature. Common tempering processes include: low temperature tempering, medium temperature tempering, high temperature tempering, and multiple tempering. The purpose of tempering: It is mainly to eliminate the stress generated in the steel part during quenching, so that the steel part has high hardness and wear resistance.

　　And has the required plasticity and toughness, etc. Tempering: Refers to the composite heat treatment process of quenching and high-temperature tempering of steel or steel parts. Steel used for tempering treatment is called tempering steel. It generally refers to medium carbon structural steel and geological pipes.