工艺因素对铸态高韧性球铁伸长率的影响

Influence of Process Factors on Elongation of As-Cast Hi-Toughness Ductile Iron

研究了孕育处理、孕育剂的加入量、C和Si含量以及原铁液含S量对铸态高韧性球铁伸长率的影响,试验结果表明,球铁化学成分(质量分数)控制在下列范围:3.00％～3.80％C,2.5％～2.9％Si,<0.2％Mn,<0.03％s,<0.06％P,采用多次孕育工艺,可使球铁单铸试块的伸长率达到20％以上。

The influences of inoculation treatment, inoculant addition amount, C and Si contents, as well as sulphur content of base iron on elongation of as-cast high toughness ductile iron was investigated. The experiment result showed that the elongation of the separated test bar can reach 20% and higher by controlling the composition in the following range (W_B/%):3.00%～3.80% C,2.5%～2.9% Si, <0.2% Mn,<0.03% S,<0.06% P and adopting multiple inoculation treatments.