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稀土蠕墨铸铁应用于140马力6110柴油机缸盖生产,已经顺利通过1000小时耐久试验,而且一次通过3000次冷热循环,500小时热冲击试验;其抗拉强度最低可达300MPa;根除了过去采用铜铝合金铸铁缸盖由于缩松造成缸盖渗漏的难题。生产中抓住了三个主要环节,即严格控制铁水量、铁水中硫和处理温度;用RE31稀土硅铁随流蠕化处理以及炉前有效控制和补救措施的运用,确保了冲天炉条件下稳定生产蠕铁。
Rare earth vermicular graphite cast iron used in the production of 140 horsepower 6110 diesel engine cylinder head has successfully passed the 1000-hour durability test, and once through 3000 thermal cycles, 500 hours thermal shock test; the lowest tensile strength of up to 300MPa; Copper aluminum alloy cast iron cylinder head cylinder head due to shrinkage problems caused by leakage. Production caught the three main links, namely strict control of molten iron, molten iron in the sulfur and processing temperature; with RE31 rare earth ferrosilicon with flow creep treatment and the furnace before the effective control and remedial measures to ensure the cupola conditions Stable production of vermicular iron.