Heat Heat treatment quality control of bearing parts is the most stringent in the entire machinery industry. Bearing heat treatment has made great progress in the past 20 years, mainly divided into clean heat treatment, precision heat treatment, energy-saving heat treatment, and a small amount of non-oxidative heat treatment.

1. Clean heat treatment

Waste water, waste gas, waste salt, dust, noise and electromagnetic radiation formed by heat treatment will cause pollution of the environment. Solving the problem of environmental pollution in 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, there are the following methods for cleaning and heat treatment:

(1) The waste heat utilization of the combustion furnace has reached a high level. Optimize the burner structure, strictly control the air-fuel ratio, ensure reasonable combustion, and minimize NOX and CO;

(2) Use gas carburizing, carbonitriding and vacuum heat treatment technologies to replace salt bath treatment to reduce the pollution of waste salt and CN-containing poisons to water sources;

(3) Use water-soluble synthetic quenching oil to replace part of quenching oil, and use biodegradable vegetable oil to reduce oil to replace oil part.

2. Precision heat treatment

Precision heat treatment has two meanings: On the one hand, according to the use requirements, materials and structural dimensions of the part, using knowledge of physical metallurgy and advanced computer simulation and testing techniques, process parameters are optimized to achieve the desired performance or maximize performance. . use of materials. On the other hand, it is to fully ensure the stability of the optimization process, to achieve small (or zero) product quality deviation, and zero heat treatment deformation.

3. Energy-saving heat treatment

Scientific production and energy management are the most potential factors for the efficient use of energy. Establishing a professional heat treatment plant to ensure full-load production and give full play to the equipment capacity is the choice of scientific management. In the energy structure of heat treatment, primary energy is the main energy; waste heat and waste heat are fully utilized; low energy consumption, short cycle process is used to replace long cycle, high energy consumption process.

4. Less and no oxidation heat treatment

From the use of protective atmosphere heating instead of oxidizing atmosphere heating to controlled atmosphere heating with precise control of carbon potential and nitrogen potential, the performance of parts after heat treatment is improved, the heat treatment defects such as decarburization and cracks are greatly reduced, and the finishing allowance after heat treatment is reduced. . , improve material utilization and processing efficiency. Vacuum heating gas quenching, vacuum or low pressure cardiburizing, nitriding, nitrocarburizing, boronizing can significantly improve quality, reduce deformation and increase life.

Our experts are on hand to guide clients in choosing the best type of bearing for their unique needs, and we’ll work closely with your team to ensure you’re selecting the best option. To learn more, reach out jrzc-bearings today.

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