Heat treatment energy saving and environmental protection

Energy conservation and emission reduction will be a basic national policy for a long time in China, and also a major part and important guarantee of China's sustainable economic development strategy. So strengthen the heat treatment of energy saving and emission reduction has been the industry's top priority. The main ways to solve the problem are:

promote the application of efficient and energy-saving advanced heat treatment equipment advanced heat treatment equipment such as multi-purpose furnace, mesh furnace, ion nitriding furnace, vacuum furnace, etc., these equipment in ensuring the quality of heat treatment parts, but also generally have a good effect of energy conservation and environmental protection. For heat treatment furnace, the main energy-saving measures can be taken:

(1) reasonable choice of energy and furnace, continuous furnace is better than the cycle furnace, the round furnace is better than the furnace;

(2) make full use of waste heat, such as bell jar furnace one furnace cover multi furnace platform is a full use of the waste heat of the furnace cover energy-saving furnace;

Optimize the furnace structure design, reduce heat loss, improve thermal efficiency, and try to use less heat storage, good insulation lightweight refractory lining, such as refractory fiber for the furnace lining energy saving design, use sealed furnace structure, prevent air leakage and inhalation;

(4) optimize the combustion process, reasonable selection and control of combustion coefficient;

(5) the use of infrared radiation coating, used for light brick and fiber composite furnace lining can save about 50% energy, used for fuel furnace can save 10% ~ 30%, heating time shortened by 20% ~ 40%; Reduce the heat loss caused by heat treatment fixture.

the following measures can be taken by adopting high efficiency and energy saving heat treatment process:

(1) Strictly control the casting and forging forming process to improve the microstructure, reduce or cancel some preparatory heat treatment;

(2) make full use of the residual heat after casting and forging processing;

(3) surface or local heat treatment to replace the overall heat treatment;

(4) increase the carburizing temperature, the use of direct gas, metal surface activation carburizing technology, ion bombardment (ion carburizing C, N), chemical carburizing technology (rare earth carburizing method), accelerate the process of chemical heat treatment;

(5) to reasonably specify the depth of effective hardening layer on the surface, replace carburizing with carbonitriding, and replace chemical heat treatment in the ferritic state with chemical heat treatment in the austenitic state;

The two-phase zone heating and quenching of subeutectoid steel;

Replace ammonia decomposition atmosphere with H2 in the hood type annealing furnace to improve heat transfer process and increase productivity;

8. Improve the conventional heat treatment process, shorten the heating and holding time of structural steel, bearing steel, tool steel, high-speed steel with high temperature short-term rapid annealing;

The application of computer simulation technology and computer dynamic control technology to optimize the heat treatment process, to achieve high quality, efficient, clean and accurate heat treatment.

With the development of economy, relying on the progress of science and technology and independent innovation, we constantly study the new technology and new equipment of heat treatment, and research and develop all kinds of energy-saving, efficient and environment-friendly heat treatment equipment. Such as the use of high frequency and ultra-high frequency pulse and laser heat treatment equipment, electron beam processing, ion bombardment chemical heat treatment and computer applications have opened up a wide space for technical innovation to improve the level of heat treatment in China.