(1) Clean heat treatment
Waste water, waste gas, waste salt, dust, noise and electromagnetic radiation formed by heat treatment will pollute the environment. Solving the environmental pollution of heat treatment and implementing clean heat treatment (or green heat treatment) is one of the development directions of heat treatment technology in developed countries. In order to reduce the emission of SO2, CO, CO2, dust and coal slag, the use of coal as fuel has been basically eliminated, and the use of heavy oil is becoming less and less. Most people switch to light oil. Natural gas is still the most ideal fuel.
The waste heat utilization of the combustion furnace has reached a very high level. The optimization of the burner structure and the strict control of the air-fuel ratio ensure that NOX and CO are reduced to a minimum under the premise of reasonable combustion; gas carburization and carbonitriding are used And vacuum heat treatment technology replaces salt bath treatment to reduce the pollution of waste salt and CN-containing toxic substances to water sources; uses water-soluble synthetic quenching oil to replace part of quenching oil, and uses biodegradable vegetable oil to replace part of mineral oil to reduce oil pollution.
(2) Precision heat treatment
Precision heat treatment has two meanings: on the one hand, it is based on the use requirements, materials, and structural dimensions of the parts, using physical metallurgy knowledge and advanced computer simulation and testing technology to optimize process parameters to achieve the required performance or maximize the material On the other hand, it is to fully ensure the stability of the optimized process, to achieve a small (or zero) product quality dispersion and zero heat treatment distortion.
(3) Less non-oxidizing heat treatment
By using protective atmosphere heating instead of oxidizing atmosphere heating to controllable atmosphere heating with precise control of carbon potential and nitrogen potential, the performance of parts after heat treatment is improved, heat treatment defects such as decarburization, cracks, etc. are greatly reduced, and the finishing allowance after heat treatment is reduced , Improve material utilization and machining efficiency. Vacuum heating gas quenching, vacuum or low-pressure carburizing, nitriding, nitrocarburizing and boronizing can significantly improve quality, reduce distortion and increase life.
(4) Energy-saving heat treatment
Scientific production and energy management are the most potential factors for the effective use of energy. The establishment of a professional heat treatment plant to ensure full-load production and give full play to equipment capabilities is the choice of scientific management. In terms of heat treatment energy structure, priority is given to primary energy; waste heat and waste heat are fully utilized; processes with low energy consumption and short cycles are used instead of processes with long cycles and high energy consumption.