论文部分内容阅读
在酸性冲天炉内熔化球墨铸铁,除了本溪炼钢低磷生铁之外,目前在国内没有更理想的新生铁,但是要制造抗拉强度高、延伸率大的球墨铸铁,即使采用本溪铁,还是不够理想的,其含锰量超过了标准(按标准锰应小于0.4%而本溪铁则大于0.6%),另外在酸性炉熔化过程中,硫的含量提高,球化处理时需要更多的镁,由于硫化镁渣进入铸件较多,很容易形成缩松和皮下气孔,因此应该找寻更理想的材料,必须符合如下条件:1.质量胜
In the acidic cupola melting ductile iron, in addition to Benxi steel low-phosphorus pig iron, the current domestic no better new iron, but to produce high tensile strength, ductility ductile iron, even with Benxi iron, or Less than ideal, the manganese content exceeds the standard (less than 0.4% for standard manganese and 0.6% for Benxi), and the sulfur content increases during acid furnace melting, requiring more magnesium for spheroidizing , Because of the magnesium sulfide slag into the cast more, it is easy to form shrinkage and subcutaneous pores, it should find more ideal material, must meet the following conditions: 1. Quality wins