Advantages Of Induction Heating Equipment

Surface quenching is one of the means to strengthen the surface of metal materials. In principle, any metal material that can be strengthened by quenching can be surface quenched. The surface quenched workpiece not only improves the surface hardness and wear resistance, but also cooperates with the core tissue that has been properly pre-heated to obtain good toughness and high fatigue strength.
1) Induction heat treatment is the development direction of heat treatment process
①The surface hardening process takes a short time and can realize digital precise control. The process flow is simple and can complete the quenching and tempering processes. The equipment has a high degree of mechanization and automation. Modern induction hardening equipment has been arranged in cold and hot processing production lines or automatic production lines. Therefore, there are advantages such as high productivity.
②The effect of quenching and strengthening of heat treatment is remarkable, the deformation of heat treatment is small, the allowance of subsequent processing is reduced, and the effect of energy saving and consumption reduction is achieved.
2) Induction heat treatment is the most energy-saving heat treatment method
Due to the progress of heat treatment induction equipment, the energy saving effect of induction heat treatment is obvious, and it is the most economical and energy-saving heat treatment method.

The average energy consumption value of high-frequency induction hardening is only equivalent to the energy consumption value of high-temperature tempering, and the energy consumption values of the remaining 13 various heat treatment processes are 2 to 20 times the energy consumption value of high-frequency induction hardening. Energy consumption accounts for 80% of variable costs in heat treatment production, so the economic effect of induction heat treatment energy saving is very considerable.
3) Inductive heating of surface-hardened parts, the quenched layer can form a considerable residual compressive stress, the maximum value of which can reach 539-784MPa. Practice has proved that the fatigue strength of the part has an obvious correspondence with its surface compressive stress value, that is, the compressive stress is large , improved fatigue strength and fatigue life. Taking the semi-shaft of Jiefang brand automobile as an example, the residual compressive stress on the surface of the semi-shaft after quenching and tempering treatment is 245-343MPa, and the residual compressive stress on the surface of the semi-shaft quenched by intermediate frequency induction is 343-539MPa. Under the action of torque 7811k m, the former The fatigue torsion life of the new one is (18.96～42.3)×104 times, and the latter is (112～300)×104 times, which is increased by 6 to 7 times. The fatigue strength of the former is 162.68MPa, and that of the latter is 311.64MPa, and the fatigue strength has increased by 92%. Therefore, it is widely used in production.
4) Induction heat treatment is a clean heat treatment: Due to the development of quenching medium, induction quenching can use water-soluble medium instead of oil cooling medium for quenching, and water quenching, or even air cooling quenching, can achieve a fume-free environment.
5) Induction heat treatment can realize local heat treatment, replace local quenching in salt bath furnace, reduce pollution and improve environmental quality.