Heat treatment development process(一)
(1) clean heat treatment
Heat treatment Production of waste water, waste gas, waste salt, dust, noise and electromagnetic radiation will cause pollution to the environment. To solve the heat treatment of environmental pollution problems, the implementation of clean heat treatment (or green environmental heat treatment) is the development of heat treatment technology
in developed countries one of the direction. In order to reduce SO2, CO, CO2, dust and cinder emissions, has basically put an end to the use of coal as fuel, heavy oil use less and less, switch to light oil, natural gas is still the best fuel.
The use of gas carburizing, carbonitriding, carburizing, and carburizing, the use of gas carburizing, carburizing, and carbon monoxide And vacuum heat treatment technology to replace the salt bath to reduce the waste salt and containing CN-toxic substances on the water pollution; the use of water-soluble synthetic quenching oil instead of part of the quenching oil, the use of biodegradable vegetable oil instead of part of the mineral oil to reduce oil pollution.
(2) precision heat treatment
Precision heat treatment has two meanings: one is based on the use of parts requirements, materials, structural size, the use of physical metallurgy knowledge and advanced computer simulation and detection technology to optimize the process parameters to achieve the desired performance or maximize the material Of the potential; on the other hand is to ensure the stability of the optimization process to achieve product quality dispersion is very small (or zero) and heat treatment distortion is zero.
(3) energy-saving heat treatment
Scientific production and energy management is the most promising factor in the efficient use of energy, the establishment of professional heat treatment plant to ensure full production, give full play to the ability of equipment is the choice of scientific management. In the heat treatment of energy structure, the preferred primary energy; make full use of waste heat, waste heat;low energy consumption, short cycle process instead of long cycle, large energy consumption process.
(4) less heat-free heat treatment
By the use of protective atmosphere heating alternative to oxidizing atmosphere heating to the precise control of carbon potential, nitrogen potential of the controllable atmosphere heating, heat treatment after the performance of parts improved heat treatment defects such as decarburization, cracks and other greatly reduced, heat treatment after the reduction of finishing , Improve the utilization of materials and machining efficiency. Vacuum heating gas quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boronizing can significantly improve the quality, reduce distortion and improve life.