| 摘要 |
<p>In order to prepare vermicular graphite cast iron in a converter, it is proposed to operate a disulphurization of the primary melting by treating with pure magnesium and alloying to the magnesium, the proportion of Mg to S being in the range from 0.8 to 2.5. The use of titanium of which the bad side effects are known may be avoided. If need be, it is quite possible to pass from the preparation of spheroidal graphite cast iron to the preparation of vermicular graphite cast iron and vice-versa; as a fact, a modification of the starting analysis is not necessary, except for a lower residual magnesium ratio; consequently, a separation of the material in process is not necessary.</p> |
