Effect of Cr, Si, Mn and Cu on the Corrosive Wear Resistance of Low-medium Chromium White Cast Iron

The low-medium Chromium white cast iron specimens were prepared in the phosphate graphite mould and the effect of Cr, Si, Mn and Cu on the corrosive wear resistance of the iron was investigated in orthogonal test. The results indicated that the low-medium chromium white cast irons had good corrosive wear resistance and the corrosive wear resistance of the specimens with optimal ingredient was three times of 20^# steel showing that the phosphate graphite mould had good under-cooling capacity. The corrosive wear resistance grew with the increase of Chromium. The proper content of Si was lower than 2%, the Mn in 2%～3%, and the Cu in 1%～2%.