苏联研制成功一种制造内燃机零件用的铸铁,使工作寿命可增加1倍以上,因而获得了专利发明权。该铸铁可在20～600℃的温度下和冲击及磨料磨损条件下可靠地工作,是制造内燃机零件的理想材料。其成分(重量％)为:碳C1.6～2.8％,硅Si0.2～1.4％,锰Mn0.4～3.5％,铬Cr3.5～8.5％,铜Cu0.5～ The Soviet Union successfully developed a kind of cast iron used in the manufacture of internal combustion engine parts, which increased the service life by more than one time, thus obtaining the right of invention. The cast iron works reliably at temperatures between 20 and 600 ° C under impact and abrasive wear conditions and is an ideal material for the manufacture of internal combustion engine parts. The composition comprises the following components in percentage by weight: 1.6 to 2.8 percent of carbon, 0.2 to 1.4 percent of silicon Si, 0.4 to 3.5 percent of manganese Mn, 3.5 to 8.5 percent of chromium Cr,