| 摘要 |
<p>Spheroidal graphite cast iron contains (by weight): 3.5-4.0 % carbon, 1.7-2.3 % silicon, less than 0.2 % manganese, less than 0.1 % chromium, 0.04-0.06 % magnesium, 0.10-0.20 % copper, 0.01-0.02 % sulphur and the balance being iron and impurities. The cast iron is made by adding a first sulphur containing inoculant to molten metal before pouring and a second sulphur containing inoculant to the molten metal during pouring. No ferrite annealing is performed on the cast iron.</p> |
