
钢砂主要技术指标
名 称 | (钢砂)铸钢砂 | |
化学成分 |
碳(C) | 0.70~1.20% |
锰(Mn) | 0.35~1.20% | |
硅(Si) | 0.40~1.20% | |
硫(S) | ≤0.05% | |
磷(P) | ≤0.05% | |
平均硬度 (500g荷载下测定) |
GP钢砂:42~50HRC (399~509HV) GL钢砂:56~60HRC (620~713HV) GH钢砂:63~66HRC (795~889HV) |
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硬度偏差 | 最大偏差范围为±3.0HRC或±40HV | |
金相组织 | 均匀的回火马氏体或回火屈氏体+弥散分布碳化物 | |
最小密度 (酒精置换法测定) |
7.4g/cm3 |
钢砂粒度分布
目数 | mm | 铸钢砂规格 mm Specification of Steel Grit mm | |||||||||
2.5 | 2.0 | 1.7 | 1.4 | 1.2 | 1.0 | 0.7 | 0.4 | 0.3 | 0.2 | ||
7 | 2.80 | all pass | |||||||||
8 | 2.36 | all pass | |||||||||
10 | 2.00 | 80%min | all pass | ||||||||
12 | 1.70 | 90%min | 80%min | all pass | |||||||
13 | 1.40 | 90%min | 80%min | all pass | |||||||
16 | 1.18 | 90%min | 75%min | all pass | |||||||
18 | 1.00 | 85%min | 75%min | all pass | |||||||
20 | 0.850 | ||||||||||
25 | 0.710 | 85%min | 70%min | all pass | |||||||
30 | 0.600 | ||||||||||
35 | 0.500 | 80%min |
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