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Comparison of Tramp Element Contents of Steel Bars from Japan and China

机译：日中两国钢棒流失元素含量比较

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摘要

In this study, a random sample of 107 steel bars from Japan and 26 steel bars from China were studied. Each specimen's elemental composition of tramp elements, such as Cu, Cr, Ni, and Sn, was analyzed. By using the compositions of specific tramp elements, electric arc furnace steel bars were distinguished. The distributions of the tramp element composition were obtained for the Japanese steel bars and represent a larger number of samples than previous studies. Those for the Chinese samples are the first published data. The compositions of the four elements in the Japanese bars are statistically significantly higher than those in the Chinese bars. Owing to the large gap between the Cu contents of the Japanese and Chinese samples, and the statistically significantly differences between the ratios of Cu to both Ni and Cr in the Japanese and Chinese samples, it is highly likely that copper-based materials are separated from steel scrap at a higher rate in China. The relationship between the Cu and Cr compositions suggested that the mixing of copper-based materials and special steels, which contribute to Cr contamination, differs between Japan and China. The distributions of the Cr composition for each country had larger standard deviations than the distributions of other elements. The ratio of the Cr and Ni compositions in the Chinese samples is less than 2.25, resulting in 18% Cr and 8% Ni in stainless steel. It was found that Ni from materials other than stainless steel was likely to have been included.
机译：在这项研究中，研究了来自日本的107根钢筋和来自中国的26根钢筋的随机样本。分析了每个标本的流浪元素（例如Cu，Cr，Ni和Sn）的元素组成。通过使用特定的流变元素组成，可区分出电弧炉钢棒。获得了日本钢棒的流浪元素成分分布，与以前的研究相比，其样品数量更多。中国样本的数据是第一个发布的数据。日方酒吧中四种元素的组成在统计上显着高于中方酒吧。由于日中两国样品中的铜含量之间存在较大差距，而且日中两国样品中Cu与Ni和Cr的比例之间存在统计学上的显着差异，因此很有可能将铜基材料与中国的废钢率更高。 Cu和Cr成分之间的关​​系表明，日本和中国在造成铬污染的铜基材料和特殊钢的混合中有所不同。每个国家的铬成分分布的标准偏差均大于其他元素的分布。中国样品中铬和镍的组成比小于2.25，不锈钢中的铬含量为18％，镍含量为8％。发现可能包含了除不锈钢以外的其他材料中的Ni。

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  • 来源
    《ISIJ international》 |2015年第9期|2027-2032|共6页
  • 作者

    Ichiro DAIGO; Yoshikazu GOTO;

  • 作者单位

    Graduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656 Japan;

    Graduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tramp element; steel scrap; electric arc furnace; steel bar; steel recycling; Cu; Cr; Ni; Sn;

    机译：流浪汉元素;废钢电弧炉金属棒;钢铁回收;铜铬你;锡;

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