网站导航 | 全球网站 | QQ:825110788
| 球铁牌号 | 机械性能 | |||
|
抗拉强度 σb（MPa） |
屈服强度 σ0.2（MPa） |
延伸率 δ（%） |
硬度（HB） | |
| QT400-18 | ≥400 | ≥250 | ≥18 | 130-180 |
| QT400-15 | ≥400 | ≥250 | ≥15 | 130-180 |
| QT450-10 | ≥450 | ≥310 | ≥10 | 160-210 |
| QT450-12 | ≥450 | ≥310 | ≥12 | 160-210 |
| QT500-7 | ≥500 | ≥320 | ≥7 | 170-270 |
| QT600-3 | ≥600 | ≥370 | ≥3 | 190-270 |
| QT700-2 | ≥700 | ≥420 | ≥2 | 225-305 |
| QT550-6 | ≥550 | ≥379 | ≥6 | 187-255 |
| 球铁牌号 | 球化率 | 基体组织 | 参碳体 |
| QT400-18 | ≥80% | 铁素体 F≥80% | ≤3% |
| QT400-15 | ≥80% | 铁素体 F≥75% | ≤3% |
| QT450-10 | ≥80% | 铁素体 F≥75% | ≤3% |
| QT450-12 | ≥80% | 铁素体 F≥75% | ≤3% |
| QT500-7 | ≥80% | 铁素体 F+珠光体 P | ≤3% |
| QT600-3 | ≥80% | 珠光体 P+铁素体 F | ≤3% |
| QT700-2 | ≥80% | 珠光体 P | ≤3% |
| QT550-6 | ≥80% | 珠光体 P+铁素体 F | ≤3% |
| 球铁牌号 | 化学成份 | |||||||
| C，% | Si，% | Mn，% | P，% | S，% | Mg，% | Re，% | Cu，% | |
| QT400-18 | 3.4-3.9 | 2.6-3.1 | ≤0.2 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
| QT400-15 | 3.4-3.9 | 2.6-3.1 | ≤0.2 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
| QT450-10 | 3.4-3.9 | 2.6-3.1 | ≤0.3 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
| QT450-12 | 3.4-3.9 | 2.6-3.1 | ≤0.3 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
| QT500-7 | 3.4-3.9 | 2.6-3.0 | ≤0.45 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
| QT600-3 | 3.2-3.7 | 2.4-2.8 | 0.4-0.5 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | 0.2-0.4 |
| QT700-2 | 3.2-3.7 | 2.3-2.6 | 0.5-0.7 | ≤0.07 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | 0.2-0.4 |
| QT550-6 | 3.4-3.9 | 2.6-3.0 | 0.1-0.4 | ≤0.06 | ≤0.03 | 0.025-0.06 | 0.02-0.04 | |
