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spherical roller bearing - China Manufacturer
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Major material factors affecting the service life of carbon chromium steel bearing parts and the degree of control as follows: (China Automotive bearings network) spherical roller bearing
(1) the steel requirements of the small dispersion of carbides in the original tissue before quenching. Austenitizing can be high temperature 630 â, 420 â high temperature, unwrought waste heat can also be used to rapid thermal annealing process.
(2) For GCr15 steel after quenching, the average carbon content of about 0.55% of cryptocrystalline martensite was uniform, about 9% Ar and 7% of the circular state of undissolved carbides microstructure. Can make use of the quenching temperature and time control of this microstructure. slewing ring bearing
(3) parts after quenching and tempering requirements of surface residues have a greater compressive stress, which contribute to the improvement of fatigue resistance. Can be used in quenching the surface a short period of time carburizing or nitriding treatment process, making the surface residues have a greater compressive stress.
(4) the manufacture of steel bearing parts, requires a higher purity, mainly to reduce the content of O2, N2, P, oxides and phosphides. Can be remelting, vacuum smelting and other technical measures to make the materials, the oxygen content of ≤ 15PPM appropriate. bearing corp
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