What heat treatment techniques are used in SKF bearings

(1) Clean heat treatment

The wastewater, exhaust gas, waste salt, dust, noise, and electromagnetic radiation generated by heat treatment can all cause pollution to the environment. One of the directions for the development of heat treatment skills in developed countries is to implement clean heat treatment (also known as green and environmentally friendly heat treatment) to address environmental pollution issues caused by heat treatment. In order to reduce the emissions of SO2, CO, CO2, dust, and coal slag, the use of coal as fuel has been fundamentally eliminated, and the amount of heavy oil used is also decreasing. Most people are switching to light oil, and natural gas is still the most ideal fuel. The utilization of waste heat in incinerators has reached a high level, and the optimization of incinerator structure and strict control of air-fuel ratio ensure that NOX and CO are reduced to the lowest limit under the premise of reasonable incineration; Using gas carburizing, carbonitriding, and vacuum heat treatment techniques instead of salt bath treatment to reduce the pollution of waste salt and CN toxic substances to water sources; Choose water-soluble quenching oil to replace some of the quenching oil, and use biodegradable vegetable oil to replace some of the mineral oil to reduce oil pollution.

(2) Fine heat treatment

Fine heat treatment has two meanings: on the one hand, based on the application requirements, data, and structural dimensions of the parts, using physical metallurgy knowledge and advanced computer imitation and detection skills, optimizing process parameters to achieve the required functions or maximize the potential of the data; On the other hand, it is sufficient to ensure the stability of the optimized process, achieving minimal (or zero) product quality dispersion and zero heat treatment distortion.

(3) Energy saving heat treatment

Scientific production and power management are the most promising factors for the effective utilization of power. Establishing a professional heat treatment plant to ensure full load production and fully utilize equipment capabilities is the choice for scientific management. In terms of heat treatment power structure, prioritize selecting primary power; Fully utilize waste heat, waste heat; Choose processes with low energy consumption and short cycles to replace processes with long cycles and high energy consumption.

(4) Less oxidation heat treatment

From using protective atmosphere heating instead of oxidizing atmosphere heating to accurately controlling carbon potential and nitrogen potential through controllable atmosphere heating, the functionality of the parts has been improved after heat treatment. The disadvantages of heat treatment, such as decarburization and cracking, have been greatly reduced, and the precision machining allowance after heat treatment has been reduced, which has improved the utilization rate of data and machining efficiency. Vacuum heating gas quenching, vacuum or low-pressure carburizing, nitriding, nitrogen carbon co carburizing, and boronizing can significantly improve quality, reduce distortion, and advance lifespan.

The quality control of heat treatment for bearing parts is the most stringent in the entire mechanical industry. The heat treatment of bearings has made great progress in the past 20 years, mainly manifested in the following aspects: research on the basic theory of heat treatment; Seminar on heat treatment process and application skills; Development of new heat treatment equipment and related skills.