Sc=Wc/Wec=3.8/(4.26-0.3×2.1)=4.43 這鑄鐵的碳當(dāng)量為4.43%。
當(dāng)量CE=C+0.3Si =3.8+0.3×2.1=4.43 碳當(dāng)量為4.43%