The heat treatment process generally includes three processes of heating, heat preservation and cooling, and sometimes only two processes of heating and cooling. These processes cannot interrupt each other. Heating is one of the important processes of heat treatment. There are various heating methods for metal heat treatment. Charcoal and coal were used earlier as heat sources, and liquid and gaseous fuels were used more recently. The application of electricity makes heating easy to control and has less pollution to the environment. These heat sources can be used for direct heating as well as indirect heating of molten salt, gold, and floating particles.

1. Formulate and implement electrical safety regulations for electrical equipment, including opening the electric plug of the furnace door, grounding the furnace shell, preventing electric shock, high-frequency equipment shielding, high-voltage leakage protection, control cabinet protection, etc., to maintain safe personnel and equipment. Insulation labor measures and protective equipment should be adopted at the production site.

2. The controllability and controllability of the gas in the furnace should be controlled to prevent the gas in the furnace from leaking due to the controllable atmosphere, and to prevent the accidental ignition of the combustible gas remaining in the furnace after the controllable atmosphere furnace and gas furnace are stopped. . Therefore, a corresponding metal heat treatment device should be provided.

3. Prevent scalds and burns from high temperature operations, and provide necessary labor protection products.

4. In order to prevent the management, handling and use of dangerous goods, and prevent the direct damage of the harmful reaction products of the materials to the operators, establish corresponding operation and storage procedures.

5. Prevent the direct damage of dust generated by sandblasting and other processes. The equipment should be airtight and ventilated to facilitate dust removal。