4.09%C,1.78%Si,0.22%Mn,0.053%P, 0.019%S 之合金組織,因為過共晶組成,可見初晶之粗大片狀石墨。 照片7共晶石墨(D型) 3.23%C,1.80%Si,0.53%Mn,0.039% P, ...
確定! 回上一頁