论文部分内容阅读
球墨铸铁是一种新型而有价值的铸造合金,按其物理、机械性能而言,超过目前铸造实践中所曾获得过的所有类型的片状石墨高质量铸铁,因而自它的发明至现在虽仅有十几年的历史,但其发展远远超过了任何一种铸造合金。根据资料表明,世界球墨铸铁产量已从1949年的51133吨增加到1962年的1500000吨。美国产量1951年为7000吨,1959年跃升至201000吨,共有450个工厂采用,8年间的发展速度增长了30倍。1962
Ductile iron is a new and valuable foundry alloy that, in terms of its physical and mechanical properties, exceeds all types of flake graphite high-quality cast iron ever obtained in casting practice, and since its invention to date, Only a dozen years of history, but its development far outnumbered any kind of casting alloy. According to statistics, the world production of ductile iron has increased from 51133 tons in 1949 to 1500000 tons in 1962. The U.S. output was 7,000 tons in 1951 and jumped to 201,000 tons in 1959. 450 factories were used in the United States and its growth rate has increased 30 times in eight years. 1962