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近几年来我们对稀土球墨铸铁进行了一系列试验室和工业性试验,重点是提高稀土球墨铸铁的性能;减少稀土硅铁的加入量;重复验证对消除铸造缺陷的有利作用;对产品进行长时间的运转试验。经过一年的时间,基本上完成了上述工作。曲轴、缸套1500小时耐久试车的结果,磨损值比部颁优等产品的质量指标还低。试验分别在试验室和生产车间进行。采用稀土硅铁球化剂成份:R_xO_y(稀土氧化物总量)24.99%;Si 38～40%;Ca 2～4%;Mn 1%;Al≤1%;Fe 25～29%。后孕育剂是75%Fe-Si;60%Fe-Mn;Si-Ca(60%Si,26%Ca)和电解铝锭。试验所用生铁成份见表1。
In recent years, we conducted a series of laboratory and industrial tests on rare earth ductile iron, with emphasis on improving the performance of rare earth ductile iron; reducing the amount of rare earth ferrosilicon addition; repeated verification to eliminate casting defects beneficial effect; Time running test. After a year, basically completed the above work. Crankshaft, cylinder 1500 hours of durable test results, wear value than the ministerial superior product quality indicators are also low. Tests were carried out in the laboratory and production workshop. Rare earth ferrosilicon nodulizer composition: R_xO_y (total rare earth oxides) 24.99%; Si 38-40%; Ca 2 ~ 4%; Mn 1%; Al≤1%; Fe 25-29%. The post-inoculant is 75% Fe-Si; 60% Fe-Mn; Si-Ca (60% Si, 26% Ca) and electrolytic aluminum ingots. Pig iron components used in the experiment are shown in Table 1.