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铸造磨球的化学成分和力学性能(GB/T17445-1999)
型号号 | 化学成分(%) | 表面硬度HRC | 落球冲击疲劳寿命(次数) | ||||||||||
C | Si | Mn | Cr | Mo | Cu | Ni | P | S | 淬火态(A) | 非淬火态(B) | |||
高铬铸铁磨球 | ZQCr26 | 2.0~2.8 | ≤1.0 | 0.5~1.5 | 22~28 | ≤1.0 | ≤2.0 | ≤1.5 | ≤0.10 | ≤0.06 | ≥56 | ≥45 | ≥8000 |
高铬铸铁磨球 | ZQCr20 | 2.0~2.8 | ≤1.0 | 0.5~1.5 | 18~22 | ≤2.5 | ≤1.2 | ≤1.5 | ≤0.10 | ≤0.06 | ≥56 | ≥45 | ≥8000 |
高铬铸铁磨球 | ZQCr15 | 2.0~3.0 | ≤1.0 | 0.5~1.5 | 13~17 | ≤3.0 | ≤1.0 | ≤1.5 | ≤0.10 | ≤0.06 | ≥56 | ≥49 | ≥8000 |
中铬铸铁磨球 | ZQCr8 | 2.1~3.2 | 0.5~2.2 | 0.5~1.5 | 7~10 | ≤1.0 | ≤0.8 | ≤1.5 | ≤0.10 | ≤0.06 | — | ≥48 | ≥8000 |
低铬铸铁磨球 | ZQCr2 | 2.2~3.6 | ≤1.2 | 0.5~1.5 | 1.5~3.0 | ≤1.0 | ≤0.8 | — | ≤0.10 | ≤0.10 | — | ≥45 | ≥8000 |
贝氏体球墨铸铁磨球 | ZQSi3 | 3.2~3.8 | 2.0~3.5 | 2.0~3.0 | — | — | — | — | ≤0.10 | ≤0.03 | ≥50 | — | ≥8000 |
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铸钢球
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