Medium chrome grinding ball
production Description
Medium-chrome steel balls typically refer to steel balls containing chromium in the range of 3% to 10%. According to national standards, medium-chrome balls are required to have a hardness greater than or equal to 47 HRC (Rockwell hardness). To ensure quality, medium-chrome balls undergo high-temperature tempering treatment to eliminate casting stress.
This tempering process is crucial for enhancing the performance and reliability of medium-chrome steel balls. By subjecting them to controlled heating and cooling cycles, we eliminate internal stresses, improve hardness, and enhance overall durability. As a result, our medium-chrome steel balls meet or exceed industry standards, making them a dependable choice for a wide range of applications where hardness, quality, and resilience are essential.
Advantages
Wear resistance: Due to the high proportion of chromium elements in the medium chromium mill, the formation of (Cr,Fe)7C3 based carbide, these carbides are distributed on the martensite matrix, improving the macro-hardness and wear resistance of the mill ball.
Hardness: The hardness of medium chromium mill balls is higher, usually above HRC50, which makes them more durable during the grinding process, reducing the frequency and cost of replacement.
Impact toughness: The addition of chromium improves the toughness of the mill ball, making it less easy to break when bearing impact and collision.
Cost performance: Compared with high chromium grinding ball, the price of medium chromium grinding ball is more economical, providing a good cost performance, suitable for use in some working conditions where the wear resistance requirement is not particularly high.
Application: Medium chromium grinding ball is widely used in metallurgical mines, cement building materials, thermal power generation and other industries, especially in some wear is not particularly intense grinding environment shows good performance.
Production cost: Compared with high chromium grinding ball, the raw material cost of medium chromium grinding ball is lower, and the production cost is relatively low, but still maintains a high wear resistance.
Adaptability: Medium chromium mill ball in different mill conditions, such as dry grinding, wet grinding, can show better adaptability.
The chemical composition and heat treatment process of medium chromium grinding balls ensure that they have a high hardness and wear resistance, while maintaining a certain toughness and impact resistance. The chromium content is between 7% and 10%, and the hardness usually reaches HRC≥50, which makes the medium chromium mill provide good performance in a variety of industrial applications. In addition, the cost performance of the medium chromium grinding ball is higher, and it is suitable for occasions where the wear resistance requirement is not particularly high but a certain economy is required.
BASIC INFO
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Grinding media information |
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|
Model NO. |
Steel balls |
Material |
Chrome |
|
Content |
3%-10% |
Processing Type |
Casting |
|
Hardness |
48-55HRC |
Customized |
Customized |
|
Broken Rate |
＜0.5% |
Heat Treatment |
Oil Quenching |
|
Size |
10mm-140mm |
Color |
Black |
|
Transport Package |
Durm or Bag |
Moder No. |
Zqcr10 |
|
Trademark |
Chengda |
Specification |
Medium Chrome Grinding Media |
|
HS Code |
7325910000 |
Origin |
China |
|
Production Capacity |
60000 Tons |
|
|
|
Usage |
Construction,Machinery, chemical Petroleum, Grind,Refractory Material, Cement Plant , Mining Mill |
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CHEMICAL COMPOSITIONS(%)
|
Designation |
Chemical Composition(%) |
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|
C |
Si |
Mn |
Cr |
Mo |
Cu |
Ni |
P |
S |
|
|
ZQCr26 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
23.0-27.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr20 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
18.0-23.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr15 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
14.0-18.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr12 |
2.2-3.0 |
≤1.0 |
0.3-1.5 |
10.0-14.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr8 |
2.2-3.0 |
≤1.0 |
0.3-1.5 |
7.0-10.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr5 |
2.2-3.2 |
≤1.0 |
0.3-1.5 |
4.0-6.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.08 |
≤0.08 |
|
ZQCr2 |
2.2-3.2 |
≤1.0 |
0.3-1.5 |
1.0-3.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.10 |
≤0.10 |
|
ZQCADI |
3.3-3.9 |
2.4-3.0 |
1.4-1.9 |
0.2-0.5 |
≤0.5 |
0.1-0.5 |
0.1-0.5 |
≤0.05 |
≤0.05 |
MECHANICAL PROPERTIES AND MICROSTRUCTURE
|
Designation |
HRC |
AK(J/CM²) |
Microstucture |
Falling Times |
|
ZQCr28 |
≥58 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr26 |
≥58 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr20 |
≥59 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr15 |
≥60 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr12 |
≥60 |
≥4.5 |
M+C |
≥18000 |
|
ZQCr8 |
50-65 |
≥3.5 |
P+C/M+C |
≥12000 |
|
ZQCr5 |
49-62 |
≥3.0 |
P+C/M+C |
≥12000 |
|
ZQCr2 |
≥48 |
≥3.0 |
P+C |
≥10000 |
|
ZQCADI |
55-60 |
≥10 |
B+Fe |
≥25000 |
|
C-Carbide M-Martensite P-Pearlite B-Bainite Fe-Ferrite |
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SPECIFICATION
|
Specification (mm） |
Weight of Each Ball (Kg) |
Pcs/ton |
T/m |
|
φ15 |
0.017 |
58824 |
4.94 |
|
φ17 |
0.024 |
41667 |
4.91 |
|
φ20 |
0.037 |
27027 |
4.89 |
|
φ25 |
0.070 |
14286 |
4.87 |
|
φ30 |
0.110 |
9091 |
4.85 |
|
φ40 |
0.257 |
3891 |
4.76 |
|
φ50 |
0.500 |
2000 |
4.70 |
|
φ60 |
0.867 |
1153 |
4.66 |
|
φ70 |
1.070 |
729 |
4.62 |
|
φ80 |
2.050 |
487 |
4.60 |
|
φ90 |
2.900 |
345 |
4.58 |
|
φ100 |
4.000 |
250 |
4.56 |
|
φ110 |
5.300 |
188 |
4.55 |
|
φ120 |
6.800 |
147 |
4.54 |
|
φ125 |
7.750 |
129 |
4.52 |
|
φ130 |
8.740 |
114 |
4.50 |
