Heat treatment development course

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(1) the production of clean heat treatment heat treatment of wastewater, waste gas, waste salt, dust, noise and electromagnetic radiation and so on causes environmental pollution. Solve the heat problem of environmental pollution, the implementation of the clean heat treatment (or green heat treatment) is one of the direction of the heat treatment technology of developed countries. To reduce emissions of SO2, CO, CO2, dust and cinder has been basically put an end to the use of coal as fuel, heavy fuel oil use less and less in favor of the majority of light oil, natural gas is the ideal fuel. Has reached a very high level waste heat utilization of the combustion furnace, burner structure optimize and air - fuel ratio of strict control to ensure reasonable combustion under the premise of the NOX and CO reduced to a minimum; gas carburizing, carbonitriding and vacuum heat treatment technology alternative to salt treatment to reduce the waste salt containing CN-toxic water pollution; synthetic water-soluble quenching oil instead of part of the quenching oil, the use of biodegradable vegetable oil instead of part of mineral oil to reduce oil pollution.

 
(2) precision heat treatment precision heat treatment has two meanings: the one hand, the requirements are based on the use of parts, materials, structure size, the use of the knowledge of physical metallurgy and advanced computer simulation and testing technology, optimization of process parameters to achieve the required performance or maximize the potential of the material; the other hand, to ensure full optimization of process stability, product quality dispersion is small (or zero) and heat treatment distortion is zero.

 
(3) scientific production of energy-saving heat and energy management, energy efficient use of the most potential factors, the establishment of a specialized heat treatment plant in order to ensure full capacity, give full play to the equipment capacity is the choice of scientific management. Heat energy structure, the first choice of primary energy; take full advantage of waste heat, waste heat; low power consumption, short cycle process instead of a long cycle, energy-consuming process.

 
(4) with little or no oxidation heat treatment by using the heat treatment of the protective atmosphere heating alternative heating, precise control of carbon potential, nitrogen potential of controlled atmosphere to improve the performance of parts after heat treatment, heat treatment defects such as decarbonization, cracks, etc. greatly reduce the oxidation of the atmosphere heated to after finishing allowance to reduce and improve the efficiency of utilization of materials and machining. Vacuum plus hot gas quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boriding can significantly improve quality and reduce distortion, and increased life expectancy.

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Introduction

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