浙江省永康拖拉机厂与省机械科学研究所合作,用含磷量0.1％左右的“杭钢”生铁,处理球墨铸铁,生产柴油机曲轴等重要零件,取得了可喜的成绩。进而又对含磷量0.15％以上的“杭钢”生铁,进行了多次试验,取得了初步成果,性能完全达到了QT60—2牌号的技术指标。他们的初步认识是: 1.通过多次孕育工艺,不仅使球墨圆整细小,增加了共晶团的个数,而且使晶界上的磷共晶分散细化,减少了它切割基体和应力集中的程度,相应地改善了常规综合机械性能, Zhejiang Yongkang Tractor Factory and the provincial Institute of Mechanical Science, with about 0.1% phosphorus content of “Hangang” pig iron, ductile iron processing, production of diesel engine crankshaft and other important parts, and achieved gratifying results. And then on the phosphorus content of more than 0.15% of the “Hangang” pig iron, conducted several tests, and achieved initial results, the performance fully met the QT60-2 grade technical indicators. Their initial understanding is: 1. Through multiple inoculation process, not only makes the ink round fine, increasing the number of eutectic groups, but also the grain boundary eutectic dispersion refinement, reducing its cutting matrix and stress The degree of concentration improves the conventional general mechanical properties accordingly,