Custom m2 carbon steel round head zinc plated blue patch machine screw

Industry knowledge：

Brief introduction of screw heat treatment process

Objective: to improve the hardness and strength of screw after cold heading.

Function: improve the mechanical properties of metal parts, such as torsion, tension and wear resistance.

Classification: carburizing heat treatment (adding carbon element to metal parts to improve their surface hardness, for metal materials with low carbon content); Quenching and tempering heat treatment (do not add elements to the metal, change the internal structure of the metal with the change of temperature to get better mechanical properties).