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bearing ball :
application fields:industries of cement building material ,metallurgical selection in mine,grinding coal in power plant,chemical industry and machinery,etc
(SIZE):DIA 20-150mm
(HARDNESS):HRC 50-60
(CHEMICAL ELEMENTS):
C:0.52-0.65 Si0.15-0.37
Mn:0.6-1.2 S:≤0.04 P:≤0.04 Cr:≤0.25
(SPECIFICATION AND HARDNESS OF FORGING BALL)
Nominal diameter (mm) | Diameteical Tolerance(mm) | Weight of single ball in average(g) | Number of piece of one ton forging ball in average | Surface hardness(HRC) | Impact toughness (j/squre centimeter) |
Φ20 Φ25 Φ30 Φ40 Φ50 | +2 -1 | 32 64 110 263 513 | 31250 15625 9090 3802 1949 | 50-65 | ≥12 |
Φ60 Φ70 Φ80 Φ90 Φ100 | +3 -2 | 888 1410 2104 2996 4110 | 1126 709 475 333 243 | ||
110 120 130 | +4 -2 | 5457 7102 9030 | 182 140 110 | 45-60 | |
140 150 | +4 -3 | 11278 13871 | 88 72 |
(The process line production)
1,RAW MATERIALS 2,CUTING 3,STOVE 4, FORGING
5,TRANSFERMACHINE 6,QUENCHING 7, PACKING
8,HARDNESSTEST 9,DIMENSIONTEST
10,HEATTREATMENT
11,PACKIN(Product performance)