【摘要】 研究了球墨铸铁原铁水中共存的砷、锡、铅、钛等微量元素含量相同时硫含量对稀土合适加入量的影响,以及孕育剂和孕育方式对石墨球化和力学性能的影响。结果表明,原铁水硫含量不同的球墨铸铁,最佳的稀土加入量均为0.005%左右,但原铁水硫含量增加,稀土合适加入量的范围减小;硫加剧微量元素对力学性能的有害影响,稀土不能完全中和与消除硫对力学性能的危害作用;强化孕育是削弱微量元素有害作用、提高力学性能的有效措施。更多还原

【Abstract】 It is researched that the effects of sulphur contents in original melted spheroidal graphite cast iron containing same contents of trace elements arsenium, tin, lead and titanium on the suitable additions of rare earth elements and the effects of inoculant and inoculation method on the graphite spheroidization and the mechanical properties The results show that the optimum additions of rare earth elements in spheroidal graphite cast iron containing different contents of sulphur in the original melted should be 0005%, but the suitable range of rare earth elements addition level is reduced with the increase in contents of sulphur in the cast iron; an increase in sulphur contents aggravates harmful effects of the trace elements on mechanical properties of the cast iron, the harmful effects of sulphur on mechanical properties can not be completely and effectively neutralized by RE addition; strengthened inoculation is a effective way to weaken the harmful effects of trace elements and raise the mechanical properties更多还原