【摘要】 作者在实际生产条件下,通过向稀土镁球铁中加微量Sb、Al、Ti元素并改变合Sb量的试验,研制出高强韧性铸态珠光体球铁使铸态性能达到QT70-2。进而研究了微量合金加入量、出箱时间、回炉铁的使用等工艺因素对珠光体数量及性能的影响,对比测定了曲轴本体试样的各种常规机械性能。试验了该材质的断裂韧性、耐磨性、低温冲击性能和实体弯曲疲劳性能。作了微量元素的微区扫描分析,为铸态球铁S195曲轴的稳定生产提供了依据。更多还原

【Abstract】 AbstractBy adding very small amounts of elements as Sb.Al.Ti to the rare-earth-magnesium treated nodular-cast -iron and changing the content of Sb under practically productional condition, the authors have investigated a kind of as-cast pearlitic nodular iron, which offers high strength and toughness. Its mechanical properties are better than those of QT70-2 nodular iron. Also the authors have studied the influence of the technical factors, such as the amount of the added alloy elements, the shaken out time, the use of scrap returns and what not,on the amount and characters of the pearlites.Various routine mechanical properties of the crankshaft test lugs have been determined in comparison. And the frarture toughness, abrasion resistance, low-temperature impact properties and realitic bending fatigue behavior have beea inrestigated. The ting-area scanning analysis for the ting-content elements has ajso been done.All of these supply the basis for the steady production of the S195-type crankshaft of as-cast pearlitic nodular iron.更多还原