24 July 2021 Ball Bearing Steel Bar
SUJ2S1 Ball Bearing Steel Bar
Japan's JIS standard SUJ2 high-carbon chromium bearing steel, corresponding to the national standard GCr15, SUJ2 high-carbon chromium bearing steel, the entire hard processing, hardness HRC58-61, with the bearing wear resistance, but also to enhance the steel, processability Good, and can be directly processed into shape, the use of mold times higher than the SKD-61 (HRC52) 2-3 times the whole hardware. In the quenching, tempering little change in size, fatigue resistance is quite good.
Comprehensive performance is good. Quenching and tempering hardness after high and uniform, wear resistance, high contact fatigue strength. Hot workability, ball annealing has good machinability, but the formation of white point sensitive.
For general plastic molds, automobiles, machine tool bearings, steel balls, rollers, bushings, cold-rolled.
Manufacture internal combustion engine Electric locomotive, machine tools, tractors, rolling equipment, drilling machines, railway vehicles and mining machinery and other drive shaft on the ball, roller and sleeve and so on.
Chemical composition(%):
| (C)%< | Si(%)< | Mn(%)< | P(%)< | S(%)< | Ni(%)< | Cr(%)< | Mo(%)< | Cu(%)< |
|---|---|---|---|---|---|---|---|---|
| 0.95-1.10< | 0.15-0.35< | 0≦0.5< | 0≦0.025< | 0≦0.025< | 0≦0.25< | 1.3-1.6< | 0≦0.08< | 0≦0.25< |
Mechanical properties:
Tensile strength σb (MPa): 1617
Impact energy Akv (J): 28
Hardness: 61 ~ 64HRC
Density: 7.8g / cm3
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Heat treatment specifications: 850 ~ 860 ℃ quenching, oil cooling; tempering at 160 ℃ 2h.
Metallography: tempered martensite
Delivery status:
Eight states of hot rolled (forged) annealing, annealing, annealing stripping steel, cold drawn (rolled) round bar, polished round steel, hot rolled steel pipe, annealed skinned steel pipe, cold drawn