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Low chrome cast grinding ball
Low chrome cast grinding ball | Card no. | Chemical analysis | |||||||
C | Si | Mn | Cr | P | S | Mo | AI | ||
ZQCr | 2.0-3.5 | ≤1.2 | ≤1.0 | 0.5-1.5 | ≤0.15 | ≤0.20 | trace | trace | |
Cu | Ni | Nb | Ti | Zr | V | B | Mg | ||
trace | trace | trace | trace | trace | trace | trace | trace | ||
Mechanical properties and microstructure
Low chrome cast grinding ball | Card no. | HRC （HRC） | impact value Ak(J/cm2) | The microstructure | Falling ball impact fatigue life |
ZQCr | ≥45 | ≥1.6 | P+C | ＞5000 |
High chrome cast grinding ball
牌号Grade | chemical composition(%) | ||||||||
C | Si | Mn | Cr | P | S | Mo | Cu | Ni | |
ZQCr10 | 2.0-3.2 | 0.3-1.2 | 0.2-1.0 | 10-13 | ≤0.10 | ≤0.10 | 0-2.0 | 0-1.0 | 0-1.5 |
ZQCr17 | 2.0-3.0 | 0.3-1.2 | 0.2-1.0 | 15-18 | ≤0.10 | ≤0.10 | 0-2.0 | 0-1.0 | 0-1.5 |
ZQCr20 | 2.0-2.8 | 0.3-1.0 | 0.2-1.0 | 18-22 | ≤0.10 | ≤0.08 | 0-2.5 | 0-1.0 | 0-1.5 |
ZQCr26 | 2.0-2.8 | 0.3-1.0 | 0.2-1.0 | 22-28 | ≤0.10 | ≤0.08 | 0-2.5 | 0-2.0 | 0-1.5 |
硬度（HRC） | 冲击值ak（J/cm2） | 落球冲击值疲劳寿命（次数）Times of falling Balls | 金相组织 Microstructure | ||||||
56-63 | ≥3.0 | ≥15000 | M+C | ||||||
M-马氏体 Martensite C-碳化物 Carbide | |||||||||
产品规格（mm）Specification | φ8 | φ10 | φ12 | φ15 | φ17 | φ20 | φ25 | φ30 | φ40 |
φ50 | φ60 | φ70 | φ80 | φ90 | φ100 | φ110 | φ120 | φ130 | |
chromium in paragraph
chemical composition(%) | |||||||||||||||
C | Si | Mn | Cr | P | S | Mo | Cu | Ni | |||||||
1.7-3.2 | 0.3-1.2 | 0.2-1.0 | 10-13 | ≤0.10 | ≤0.10 | 0-3.0 | 0-1.0 | 0-1.5 | |||||||
硬度（HRC） | 金相组织 Microstructure | ||||||||||||||
M-马氏体 Martensite C-碳化物 Carbide | |||||||||||||||
产品规格（mm）Specification | φ8×10 | φ10×12 | φ12×14 | φ14×16 | φ16×18 | φ18×20 | |||||||||
φ20×20 | φ20×25 | φ25×30 | φ30×35 | φ35×40 | φ40×45 | ||||||||||
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