Materials of FAG bearings
Materials of FAG bearings
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TIMKEN bearing import quenching method and selection of cooling medium
by：Waxing
2020-09-28
TIMKEN bearing import quality super good, so make up also very troublesome.
Many of the TIMKEN bearing import manufacturers won't create (produce), only to please the professional manufacturing technicians bearing production process.
According to the chemical composition of TIMKEN bearing import parts, shape, size, and the mechanical properties of the design requirements, can adopt different quenching method, each bearing steel has its fixed curve C, determines the microstructure after quenching cooling medium and the mechanical properties, so you must focus on thinking and concrete analysis, in fact, many bearing parts heat treatment defect generation and cooling TIMKEN bearing import media choice has a direct relationship, but also related to the concrete operation process.
Artifacts in heat treatment furnace heated to completely after austenitizing, in order to obtain the required set of woven and performance, need to quenching process.
Artifacts to get martensite structure after cooling, the cooling rate must be greater than the critical cooling rate, speed too fast, but the cold causes artifacts volume shrinkage and organizational change drastically, cause a lot of internal stress.
So 'F', under the condition of get martensite should make cooling rate as low as possible, and the ideal cooling curve as shown in figure.
Choose appropriate quenchant is particularly important, it determines the TIMKEN bearing import parts the organization and performance after quenching, quenching medium usually have a solid, liquid and gas three, according to the bearing when quenching medium changes of state is divided into changes of state and change of state class.
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