(1) Clean heat treatment waste water, waste gas, waste salt, waste oil and electromagnetic radiation generated by heat treatment production will pollute the environment. To solve the environmental pollution problem of heat treatment, clean heat treatment (or green heat treatment) is one of the developing directions of heat treatment technology. This puts forward high requirements for heat treatment atmosphere, quenching oil and cleaning equipment.

 

(2) Precision heat treatment Precision heat treatment is to fully ensure the stability of the optimized process, realize the product quality dispersion is very small (or zero), heat treatment distortion is zero, reduce the grinding allowance, improve production efficiency, save materials. To achieve precision heat treatment, it is necessary to have good uniformity of furnace temperature, accuracy of temperature control, and good coolability and stability of quenching agent. The precision heat treatment of bearings can be achieved by integral quenching and induction quenching.

 

(3) Energy-saving heat treatment use new thermal insulation materials to improve the energy utilization rate of heat treatment equipment; Optimize heat treatment process, improve process output, give full play to equipment capacity. At the present stage, all bearing manufacturers are doing this aspect of the test, such as making full use of waste heat, waste heat, some manufacturers have used the waste heat forging bearing parts spheroidizing annealing; The process with low energy consumption and short cycle is used to replace the process with long cycle and high energy consumption. The lower bainite quenching process replaces the carburizing process with shorter bainite quenching process to a certain extent and within a certain range.

 

(4) no less oxidation heat treatment By adopting protective atmosphere heating instead of oxidizing atmosphere heating to the precise control of carbon potential, nitrogen potential controlled atmosphere heating, parts performance was improved after heat treatment, heat treatment defects such as oxidation and decarburization and crack greatly reduced, finish machining allowance reduced after heat treatment, improve the utilization rate of material and machining efficiency. Vacuum heating quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boronizing can obviously improve the quality of workpiece, reduce distortion and prolong life