In China, controlled atmosphere heat treatment is becoming increasingly popular, gradually replacing traditional mesh belt furnaces for heating and quenching. This aligns with the trend of industrial upgrading and manufacturing transformation in the country.

Metallic materials refer to a broad category of materials that primarily consist of metallic elements or are predominantly composed of metallic elements, exhibiting characteristic metallic properties.

Heat treatment refers to the use of heat or cooling to achieve the desired result, such as hardening or softening of the material.