公开(公告)号：US4227924A

公开(公告)日：1980-10-14

申请号：US907005

申请日：1978-05-18

申请人： Sundaresa V. Subramanian ,  Debabrata S. Ghosh ,  John M. Gray ,  David A. R. Kay ,  Gary R. Purdy

发明人： Sundaresa V. Subramanian ,  Debabrata S. Ghosh ,  John M. Gray ,  David A. R. Kay ,  Gary R. Purdy

IPC分类号： C21C1/10 ,  C21C1/02 ,  C21C1/08 ,  C22C33/08

CPC分类号： C21C1/02 ,  C21C1/08

摘要： Process for producing vermicular cast iron comprising: (i) forming a near eutectic melt having a sulfur content preferably less than about 0.025% by weight; (ii) admixing at least one rare earth-containing additive with said melt to form stable rare earth oxysulfides thereby reducing and maintaining the Henrian sulfur activity in the melt at between about 0.004 and 0.035; and (iii) thereafter, allowing said melt to solidify.

摘要翻译： 制造蠕墨铸铁的方法包括：（i）形成硫含量优选小于约0.025％（重量）的近共晶熔体; （ii）将至少一种含稀土添加剂与所述熔体混合以形成稳定的稀土氧硫化物，从而将熔体中的亨利硫活性降低并保持在约0.004至0.035之间; 和（iii）之后，使所述熔体固化。