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炉料 W.L.Swager等人合作,广泛研究了废料成分变化对美国钢铸件和铁铸件质量可能产生的影响,归纳了有关文献中关于废钢和废铸铁件所含合金元素和微量元素引起铸件成分不纯的论述。他们宣称:“永远保持警惕是免除为微量元素而烦恼所需付出的代价”,並接着提出了使铸铁厂能够解决废料成分不纯问题的四点要求:
WLSwager and others investigated the possible impact of scrap composition changes on the quality of steel castings and iron castings in the United States and summarized the literature on the impure composition of castings caused by the alloying elements and trace elements contained in scrap and scrap cast iron Discussion. They claim: “Always be vigilant is the price you will have to save you from worrying about trace elements” and then set forth four requirements that will enable the foundry to address the problem of impurities in the waste composition: