上钢一厂与上海机械工艺研究所协作对蠕虫状石墨铸铁钢锭模作了系统的试验研究,取得了初步成果。在该厂第二转炉车间锭模用后喷吹冷却的条件下,蠕虫状石墨比为10-50%的钢锭模使用寿命最长,比普通灰口铸铁锭模提高68-92%,比球墨铸铁锭模提高11—20%。该厂生产蠕墨铸铁锭模是以稀土一镁中间合金为蠕化剂。现采用复包处理工艺,虽 The first steel plant and the Shanghai Institute of Mechanical Technology collaborated on the worm-shaped graphite cast iron ingot mold system experiments, and achieved initial results. In the second converter plant after the mold ingot mold cooling after injection, the worm-like graphite ratio of 10-50% of the ingot mold longest life expectancy than ordinary gray cast iron mold increased by 68-92% than the nodular Cast iron mold increased by 11-20%. The plant produces vermicular cast iron ingot mold is a rare earth magnesium master alloy as a vermiculant. Now using complex processing technology, though