■ Mechanical Properties And Metallographic Structure Of Casting Grinding Ball
Product Brand |
Specifications (mm) |
Hardness (HRC) |
Shock Absorption Energy (J) |
Metallography |
Cr5 |
Φ10~130 |
≥50 |
≥3.5 |
M+C |
Cr10 |
≥58 |
≥3.5 |
M+C |
|
Cr17 |
≥58 |
≥3.5 |
M+C |
|
Cr20 |
≥58 |
≥3.5 |
M+C |
|
Cr26 |
≥58 |
≥3.5 |
M+C |
■ Chemical Constituents Of Forged Grinding Ball
Material |
Chemical Constituents ( wt% )
|
|
|||||||
C |
Si |
Mn |
P |
S |
Cr |
V |
Ti |
Cu |
|
B2 |
0.75-1.00 |
0.70-1.20 |
0.80-1.00 |
≤0.030 |
≤0.035 |
0.20-0.50 |
≤0.1 |
≤0.1 |
≤0.1 |
B3 |
0.45-0.70 |
0.30-1.20 |
0.40-1.00 |
≤0.030 |
≤0.035 |
0.20-0.50 |
-- |
-- |
|
B4 |
0.075-1.05 |
0.12-0.32 |
1.05-1.15 |
≤0.025 |
≤0.025 |
0.5-0.6 |
- |
- |
|
■ Technical Requirements Of Forged Grinding Ball
Code Name |
Fatigue Life of Falling Ball Impact |
Rockwell Hardness |
Impact |
|
Surface Hardness (HRC) |
Core Hardness(HRC) |
Toughness Ak(J) |
||
H40 |
≥8000 times |
61-63 |
≥60 |
≧12 |
H50 |
≥8000 times |
61-63 |
≥60 |
≧12 |
H60 |
≥10000 times |
60-63 |
≥60 |
≧12 |
H65 |
≥13000 times |
60-63 |
≥59 |
≧12 |
H70 |
≥13000 times |
60-63 |
≥59 |
≧12 |
H75 |
≥13000 times |
60-63 |
≥59 |
≧12 |
H80 |
≥20000 times |
60-63 |
≥59 |
≧12 |
H85 |
≥20000 times |
60-62 |
≥59 |
≧12 |
H90 |
≥20000 times |
60-62 |
≥59 |
≧12 |
H95 |
≥20000 times |
60-63 |
≥59 |
≧12 |
H100 |
≥20000 times |
60-63 |
≥58 |
≧12 |
H120 |
≥20000 times |
59-62 |
≥58 |
≧12 |