Stainless steel bearing technology exchange - bearing knowledge

Austenite stainless steel corrosion resistance: have no rust and corrosion resistance. With increasing amount of Cr, nitric acid oxidation, such as acid corrosion resistance and high temperature oxidation resistance, vulcanization performance improvement. With improving Ni content, the resistance to chloride stress corrosion performance and the performance of reducing acid increased. With the decreasing amount of C, or join a stabilizing element, steel intergranular corrosion resistant performance for improvement. With the increase of the amount of Mo, steel reducing acid resistance and resistance to pitting corrosion, crevice corrosion performance increase. In steel containing Cu, in particular, Mo, Cu composite, steel has been improved, the sulfate resistance of containing Si ~ 4%, fuming nitric acid corrosion resistance. Reduce some impurity elements in steel C, Si, P, such as Ti content, can be used as nitric acid, urea level using stainless steel. Mechanical and physical performance: has the strong - Tough - Good cooperation from the plastic, excellent low temperature toughness, can be used as low temperature steel. With the decreasing of C content in steel, the strength of the steel are down a bit, Low carbon steel than high carbon low average of 29. 4~49MPa） With the increase of cold deformation, the strength of the steel, elastic steel containing N, increase the strength of steel. Cr- Austenitic stainless steel with Mn, Mn N join reinforcement, strength of Cr - relatively High Ni austenitic steel by about 30%, and plastic, toughness is better. This kind of steel is non-magnetic more, can be used as no magnetic steel. Martensitic stainless steel corrosion resistance: chromium martensitic stainless steel does not rust resistance, resistance to weak corrosion medium, with increased Cr content, the addition of Mo increased corrosion resistance, with the C content increased, the corrosion resistance decline, with the increase of hardness, resistance to hydrogen sulfide stress corrosion sensitivity enhancement. Martensite chromium nickel stainless steel does not rust resistance, including Cr17 %, corrosion resistance and 18 8 similar or slightly lower. Mechanical and physical properties: chromium martensitic stainless steel with C content increased, the strength of steel, hardness increased, up to RC60 above, the wear resistance of steel is good, but the toughness is poor. Containing Mo, V, improve the strength of steel. Steel is strong - containing a small amount of Ni Toughness cooperate well. This kind of steel is brittle transition temperature, magnetic, small density, good shock resistance, elastic modulus was slightly lower than that of carbon steel. Martensite chromium nickel stainless steel with high strength ( The OS is not less than 9800 mpa) And high hardness ( RC is not less than 36) With high strength/weight ratio. Materials in the application of stainless steel bearing: SUS304, SUS316, SUS316L: austenitic stainless steel inner and outer ring of bearing, ball and cage, rivet, bearing seat, the top silk, dust cover, seal skeleton. Of martensite stainless steel bearing cage, rivet, bearing seat, the top silk, dust cover, seal skeleton. SUS440C SUS440B: martensite stainless steel inner and outer ring of bearing, ball.