Qingzhou Taihong Special Casting Steel Co., Ltd.
Qingzhou Taihong Special Casting Steel Co., Ltd.
[
Shandong,
China (Mainland) ]
Shandong, China (Mainland)
Metal Media
| Packaging Details: | white ton bags or steel drums |
|---|---|
| Delivery Detail: | QNE 20GP container can be delievered within 10 days |
a) High hardness and wear resistance
b) Good even wear
c) low breaking and wear rate
d) grinding media for ball mill
1.Chemical composition:
Casted grinding ball
|
Item |
C |
Cr |
Si |
Mn |
S |
P |
Cu |
Mo |
Hardness |
|
Low Chrome |
1.8-3.5 |
1-3.5 |
≤1.2 |
≤1.5 |
≤0.15 |
≤0.15 |
≤0.5 |
≤1.0 |
≥45HRC |
|
Medium Chrome |
1.8-3.3 |
4-9 |
≤1.2 |
≤1.8 |
≤0.15 |
≤0.15 |
≤1.0 |
≤1.5 |
≥50HRC |
|
High Chrome |
1.6-3.3 |
10-15 |
≤1.0 |
≤2.5 |
≤0.10 |
≤0.10 |
≤1.5 |
≤1.0 |
≥55HRC |
|
Higher Chrome |
1.6-3.3 |
15-18 18-27 |
≤1.0 |
≤2.5 |
≤0.10 |
≤0.10 |
≤1.5 |
<2.0 |
≥60HRC |
2.
| Nominal diameter-mm | Weight of single of casting ball in average -kg | Number of piece of one ton forging ball in average | impact toughness |
| DIA 10 | 0.0135 | 74073 | ≥12 |
| DIA 15 | 0.0242 | 41322 | |
| DIA 20 | 0.0322 | 31056 | |
| DIA 25 | 0.063 | 15873 | |
| DIA 30 | 0.11 | 9091 | |
| DIA 40 | 0.257 | 3891 | |
| DIA 50 | 0.5 | 2000 | |
| DIA 60 | 0.867 | 1153 | |
| DIA 70 | 1.37 | 729 | |
| DIA 80 | 2.05 | 487 | |
| DIA 90 | 2.9 | 345 | |
| DIA 100 | 4 | 250 | |
| DIA 110 | 5.3 | 188 | |
| DIA 120 | 6.8 | 147 | |
| DIA 125 | 7.75 | 129 | |
| DIA 130 | 8.74 | 114 |
3 Production Process
The production of casting steel balls is to melt the waste raw material such as waste steel, waste iron with medium frequency induction furnace. In the process of melting, add suitable amount of precious metal alloys(such as Ferrochrome, ferromanganese, ferro-vanadium ) to the furnace. When the temperature of the molten iron is more than 1550°C and can meet the requirements of the technics,pour the qualified molten iron to steel moulds or steel production line moulds. The content of chrome of high chrome alloy casting steel balls is ≥10.0%, the content of carbon is 1.80%-3.20%. Since the national standards require the HRC≥58, ak≥3.0J/cm2, to up to this hardness, the high chrome balls must be quenched and tempered. After quenched and tempered, the hardness(HRC≥60) is higher, the wear-resistance is more than 2.5 times of forging balls.
4 Production Technics
Raw material(waste steel,waste iron,iron alloy)factory inspection→blending→melt→composition inspection→casting→cooling and solidification→demould→clean and polish→inspection→quenching(increase hardness)→hardness inspection→tempering(eliminate stress)→inspection→warehousing
