1. Carburizing: A type of chemical heat treatment in which a C element is infiltrated into the surface of a steel member in an active medium containing a certain chemical element at a certain temperature. Partial preheating (850 ° C) carburizing (890 ° C) diffusion (840 ° C) process
2, quenching: carbon and low alloy carburizing steel, generally using direct quenching or one quenching.
3. Tempering: low temperature tempering to eliminate internal stress and improve the strength and toughness of the carburized layer. The tempering temperature of the middle teeth of our company is about 360 °C, and the self-drilling screws (wall plate nails) have a tempering temperature of about 200 °C, and then cooled to 34-35 ° C and 39-40 ° C respectively.
Screw hardening, screw heat treatment, general screw SMEs, there will be no self-heating factory of the enterprise. Generally, it is necessary to send it to a professional screw and hard factory. Therefore, our company that produces screws attaches great importance to the choice of heat treatment plants. To choose a reasonable price, the quality of the screw after heat treatment is high quality.