论文部分内容阅读
为了提高铁路和工业运输制动闸瓦的性能,曾对添加0.1～0.5%铈以对含有2.6～3.2%碳、1.4～1.6%硅、0.5～0.7%锰、0.5～0.35%磷的亚共晶铸铁进行变性处理的可能性作了研究。在恒定温度条件下,合成铸铁在实验室电炉内熔化,用铈铁合金在浇包内进行变性处理,在湿型内浇注成直径50毫米和高200毫米的试样。随着磷含量的提高,石墨片起先逐渐变薄,随后形成粗石墨片,同时相应地改变作为磷含量极限函数的共晶体区N/毫米~2
In order to improve the performance of railway and industrial transport brake shoes, the addition of 0.1-0.5% cerium to a mixture of 2.6-3.2% carbon, 1.4-1.6% silicon, 0.5-0.7% manganese, 0.5-0.35% phosphorus, The possibility of denatured cast iron has been studied. Under constant temperature conditions, the synthetic cast iron was melted in a laboratory electric furnace, denatured in a ladle with an alloy of cerium and iron, and poured into a sample of 50 mm in diameter and 200 mm in height in a wet form. As the phosphorus content increases, the graphite sheet initially becomes thinner, and then a coarse graphite sheet is formed, with corresponding changes in the eutectic zone N / mm2 as a function of phosphorus content