The types of quenching include induction heating surface quenching, flame heating surface quenching, electrolyte quenching, and laser quenching.
Rapid heating of the workpiece causes rapid phase change of the surface tissue and transforms it into unique properties, which is called surface heat treatment.
Induction heating quenching
A process in which the whole or part of the workpiece is placed in an inductor. Due to the skin effect of high-frequency current, the corresponding parts of the part are heated from the surface inward, and the temperature rises to transform the surface structure into austenite at a certain depth, and then is quickly hardened. .
Flame heating quenching
A flame burning with a mixture of acetylene-oxygen or gas-oxygen is sprayed onto the surface of the part for rapid heating. After reaching the quenching temperature, water is sprayed immediately, or other quenching media are used for cooling, thereby obtaining higher hardness on the surface layer while retaining the core. The toughness and plasticity of the parts.
Immerse the end of the workpiece that needs to be hardened into the electrolytic quenching liquid, connect the part to the cathode, and the electrolyte to the anode. After power is turned on, part of the surface of the part in the liquid is heated due to the cathode effect. After reaching the temperature, the power is turned off, and the parts are immediately cooled and hardened by the surrounding electrolyte.
A process that uses high-energy laser as a heat source to rapidly heat and cool itself to harden. Parts with complex shapes can be locally laser scanned and quenched, and the range of the quenching zone can be accurately selected.