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Specifications
1.High hardness;2.Even hardness and long life;
3.High wear-resistance;
4.High impact toughness;
5.Unbreakable
Company Profile:
Jinan Jinchi Steel Ball Co.,LTD . is the biggest and most specialized gringding media manufacturer in China, annual production capacity is over 100,000 tons. Our products are well accepted by clients from Korea,Japan,South Africa,Australia and other countryies from the world.
Specifications and Hardness of Forging Ball:
|
Nominal Diameter (mm) |
Diameterical Tolerance (mm) |
Weight of Single Forging Ball in Average(g) |
Number of piece of OneTon Forging Ball in Average |
Surface Hardness (HRC) |
Impact Toughness (j/cm2) |
|
¢20 ¢ 25 ¢ 30 ¢ 40 ¢ 50 |
+2 -1 |
32 64 110 263 513 |
31250 15625 9090 3802 1949 |
50-65 |
≥12 |
|
¢ 60 ¢ 70 ¢ 80 ¢ 90 ¢ 100 |
+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 |
Physical Property of Forged Alloy Steel Ball:
Materials |
Impact Test (Ak.J/cm²) |
Endurance Test Times (5m/T) |
Surface Hardness (Dia25mm-90mm) |
Core Hardness (Dia25mm-90mm) |
Surface Hardness (Dia90mm-150mm) |
Core Hardness (Dia90mm-150mm) |
Breakage |
50Mn |
≥12 |
≥10000 |
≥52 |
≥42 |
≥50 |
≥40 |
<0.5% |
60Mn |
≥13 |
≥10000 |
≥52 |
≥42 |
≥50 |
≥40 |
<0.5% |
65Mn |
≥15 |
≥12000 |
≥54 |
≥44 |
≥52 |
≥42 |
<0.5% |
B2 |
≥17 |
≥12000 |
≥60 |
≥52 |
≥58 |
≥50 |
<0.5% |
75SiMn |
≥16 |
≥12000 |
≥60 |
≥52 |
≥58 |
≥50 |
<0.5% |
Impact -resistant Alloy |
≥17 |
≥10000 |
≥50 |
≥40 |
≥48 |
≥38 |
<0.5% |
Wear-resistant Alloy |
≥17 |
≥12000 |
≥60 |
≥52 |
≥58 |
≥50 |
<0.5% |
The Chemical Composition of Forged Alloy Steel Ball Is as Follows:
Material |
C |
Si |
Mn |
Cr |
S |
P |
Times of Endurance impact test |
50Mn |
0.48-0.56 |
0.17-0.37 |
0.70-1.00 |
≤0.25 |
≤0.035 |
≤0.035 |
≥10000 |
60Mn |
0.57-0.65 |
0.17-0.37 |
0.70-1.00 |
≤0.25 |
≤0.035 |
≤0.035 |
≥10000 |
65Mn |
0.62-0.70 |
0.17-0.37 |
0.90-1.20 |
≤0.25 |
≤0.035 |
≤0.035 |
≥12000 |
B2 |
0.65-0.78 |
0.17-0.37 |
0.70-1.20 |
0.55-0.60 |
≤0.035 |
≤0.035 |
≥12000 |
75SiMn |
0.70-0.90 |
0.40-0.80 |
0.70-1.20 |
≤0.25 |
≤0.035 |
≤0.035 |
≥12000 |
Impact -resistant Alloy |
0.37-0.45 |
0.20-0.45 |
0.50-1.00 |
0.80-1.20 |
≤0.035 |
≤0.035 |
≥10000 |
Wear-resistant Alloy |
0.75-0.90 |
0.15-0.42 |
0.65-1.10 |
0.88-1.20 |
≤0.035 |
≤0.035 |
≥12000 |
Production Process of Steel Ball:
1.The blank used for producing the grinding steel ball is hot-rolled bars with various kinds of chemical compositons.Its diameter is the same as the nominal
diameter of steel balls.
2.Bars are reheated to a proper temperature in a contious furnace before being rolled.
3.After a red hot bar is conveyed into the skew rolling mill,it rotates forward between two rolls with
special spiral passes.As this process continous,it is gradually rolled into steel balls.A single skew
rolling mill can produce 60-360 steel balls per minute.
4. The hot steel balls are transported directly to the online heat treatment equipment,specially
designed for steel balls’ quenching and tempering.Steel balls can obtain very high and uniform
hardness .
5.Finished steel balls are charaterized by the precise dimension and geometry,better anti-wear properties and mechanical properties.
6.The products which passed inspection are transported to the finished product storehouse and then delivered to customers after being packed.
Certificate:
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