Cast low- and medium-chromium alloy grinding balls are wear-resistant grinding media designed for ball mill grinding systems; they are widely used in industries such as cement, construction materials, mining, power generation, and chemicals. Manufactured using alloy casting technology, these balls feature a carefully balanced composition of chromium, carbon, and other alloying elements, resulting in an optimal combination of wear resistance, toughness, and cost-effectiveness suitable for low- to medium-intensity grinding operations.
Low-chromium alloy grinding balls offer excellent toughness and impact resistance, making them ideal for ball mills operating under relatively low impact forces and requiring long, continuous run times—such as in cement clinker grinding, limestone pulverization, and coal powder preparation. Medium-chromium alloy grinding balls build upon the low-chromium variant by increasing chromium content and optimizing the alloy microstructure; this enhances surface hardness and wear resistance, making them better suited for ore grinding, aggregate processing, and other applications demanding superior wear performance.
This series of grinding balls is produced using advanced casting and heat-treatment strengthening processes, ensuring excellent internal structural stability and high overall mechanical properties. Proper heat treatment increases surface hardness while maintaining internal toughness, effectively minimizing breakage during operation and enhancing the overall efficiency of the ball mill.
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Chemical Composition Of Low And Medium Chromium Alloy Balls
| Brand name | C | Si | Mn | Cr | Mo | P | S |
| ZQCr–2 | 2.0~3.3 | ≤1.2 | 0.3~1.0 | 1.0~3.0 | 0~1.0 | ≤0.10 | ≤0.10 |
| ZQCr–5 | 2.0~3.3 | ≤1.2 | 0.3~1.0 | 4.0~6.0 | 0~1.0 | ≤0.10 | ≤0.10 |
| ZQCr–8 | 2.1~3.3 | ≤1.2 | 0.3~1.0 | 7.0~10.0 | 0~1.0 | ≤0.10 | ≤0.06 |
Mechanical Properties And Microstructure (Low & Medium Chromium Alloy Balls)
| Brand name | Surface Hardness (HRC) | Impact value ak(J/cm²) | Microstructure | Time of Falling Balls (times) |
| Tempered (B) | ||||
| ZQCr–2 | ≥45 | ≥1.6 | P+C | ≥8000 |
| ZQCr–5 | ≥47 | ≥2.0 | P+C | ≥8000 |
| ZQCr–8 | ≥50 | ≥2.0 | P+C | ≥10000 |
Chemical Composition Of Multielement Alloy Casting Ball
| Brand name | C | Si | Mn | Cr | Mo | Cu | Ni | Nb | Ti | Zr | V | B | P | S |
| Multi-element Ball I | 1.8~3.2 | <0.8 | 0.3~1.2 | 1.5~3.0 | ≤0.5 | ≤0.8 | ≤0.5 | ≤0.2 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.1 | ≤0.06 | ≤0.06 |
| Multi-element Ball II | 1.8~3.2 | <0.8 | 0.3~1.2 | 3.0~4.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.2 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.1 | ≤0.06 | ≤0.06 |
Mechanical Properties And Microstructure (Multielement Alloy Casting Ball)
| Brand name | Surface Hardness (HRC) | Impact value ak(J/cm²) | Microstructure | Specification | Time of Falling Balls (times) |
| Multi-element Ball I | 48~56 | ≥2.0 | P+C | < Φ80 | ≥12000 |
| Multi-element Ball I | 48~56 | ≥2.0 | P+C | ≥ Φ80 | ≥10000 |
| Multi-element Ball II | 50~62 | ≥3.5 | M+C | < Φ80 | ≥12000 |
| Multi-element Ball II | 50~62 | ≥3.5 | M+C | ≥ Φ80 | ≥10000 |
Anhui Ningguo Wanfu New Material Science and Technology Development Co., Ltd. is located at the foot of the Huangshan Mountain -- the capital of wear-resistant materials in China, the provincial high-tech economic and technological development zone, and is a professional manufacturer of wear-resistant materials series products.
Wear-resistant material technology combined with grinding technology as the guide, sets scientific research, design, development, manufacturing, and technical services as one. With a resin sand extrusion model automatic production line, resin sand automatic production line, iron film coated sand casting production line, with no box shape casting production lines, automatic oil quenching heat treatment production line, desktop car and well type heat treatment furnace, shot blasting machine and direct reading spectrometer, chemical analysis instruments, metallurgical microscope, durometer, impact tester, etc. A full set of production and physical and chemical testing equipment...
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qi18156307775@163.com
+86-18156307775
+86-563-4187518
No.1 Chuangxin South Road, Economic and Technological Development Zone, Ningguo City, Anhui Province, China
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