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发明公开
CN109930059A 低温高强高韧球墨铸铁及其制备方法和铁路机车零部件 有权

低温高强高韧球墨铸铁及其制备方法和铁路机车零部件
摘要：
本发明公开了一种低温高强高韧球墨铸铁及其制备方法和铁路机车零部件，所述球墨铸铁的化学成分及其重量百分比为：C 3.6%～3.85%，Si 1.7%～2.1%，Mn＜0.2%，P＜0.035%，S 0.003%～0.012%，Cu 0.08%～0.25%，Ni 0.8%～1.15%，Re 0.01%～0.03%，Mg 0.025%～0.045%，余量为铁和不可避免的杂质。本发明获得了性能高于QT500-7的超低温球墨铸铁，高强、高韧、具有良好的超低温性能（-60℃冲击功AKV均值≥4J），各项性能指标完全符合中国铁路总公司的TJ/JW 065-2015《交流传动机车球墨铸铁齿轮箱暂行技术条件》的最新规定。
摘要（英）：

The invention discloses a low-temperature high-strength and high-toughness nodular cast iron and a preparation method thereof and spare parts of a locomotive. The nodular cast iron comprises the following chemical components in percentage by weight: 3.6-3.85% of C, 1.7-2.1% of Si, less than 0.2% of Mn, less than 0.035% of P, 0.03-0.012% of S, 0.08-0.25% of Cu, 0.8-1.15% of Ni, 0.01-0.03% of Re, 0.025-0.045% of Mg, and the balance iron and inevitable impurities. The ultralow temperature nodular cast iron of which the performance is beyond QT500-7 is prepared and is high in temperature, high intoughness and high in ultralow temperature performance (the average value of impact power AKV under temperature of -60 DEG C is not less than 4J); and all performance indexes completely meet the newest regulations of TJ/JW065-2015 Interim Technology Conditions of Nodular Cast Iron Gearbox of AC Transmission Locomotive of China Railway Corporation.

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