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Precipitation Behavior of Copper Sulfides in Fe-Si-Cu-S Ferritic Steel

机译：Fe-Si-Cu-S铁素体钢中硫化铜的沉淀行为

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摘要

Precipitation behavior of copper sulfides in Fe-3.2%Si-0.4%Cu-0.02%S (mass%) ferritic steel was studied by X-ray diffraction (XRD), microstructure examination by transmission electron microscope (TEM) and scanning electron microscope (SEM). From the TEM results, it was found that FeS and cubic Cu_(2-x)S, precipitated in as-cast specimens. XRD peaks due to the cubic Cu_(2-x)S almost disappeared at 1 173 K. XRD peaks due to the hexagonal Cu_(2-x)S were identified in specimens annealed above 1 373 K. Assuming that the hexagonal Cu_(2-x)S is metastable in steel, which precipitates during cooling after dissolution of the stable cubic Cu_(2-x)S, it can be suggested that the cubic Cu_(2-x)S was dissolved at least 1 173 K. Results of thermo-dynamic calculations are consistent with this suggestion, which indicates that the dissolution temperature of the cubic Cu_(2-x)S is lower than those of other sulfides such as MnS and FeS in the ferritic steel.
机译：通过X射线衍射（XRD），透射电子显微镜（TEM）和扫描电子显微镜（X射线衍射）研究了Fe-3.2％Si-0.4％Cu-0.02％S（质量％）铁素体钢中硫化铜的沉淀行为（ SEM）。从TEM结果，发现FeS和立方Cu_（2-x）S在铸态样品中析出。立方Cu_（2-x）S引起的XRD峰在1 173 K处几乎消失。六角形Cu_（2-x）S引起的XRD峰在1 373 K以上退火的样品中被确定。假定六角Cu_（2 -x）S在钢中是亚稳态的，在稳定的立方Cu_（2-x）S溶解后在冷却过程中析出，这表明立方Cu_（2-x）S溶解了至少1 173K。热力学计算的结果与该建议相符，表明立方晶Cu_（2-x）S的溶解温度低于铁素体钢中其他硫化物如MnS和FeS的溶解温度。

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  • 来源
    《ISIJ international》 |2016年第11期|2062-2067|共6页
  • 作者

    Takashi KATAOKA; Yoshihiro ARITA; Fumiaki TAKAHASHI; Hiroshi FUJIMURA; Yosuke KUROSAKI; Masaaki SUGIYAMA; Ikuo OHNUMA;

  • 作者单位

    Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Steel Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Advanced Technology Research Laboratories, Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, Chiba, 293-8511 Japan;

    Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6-2 Aoba-yama, Sendai, 980-8579 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

    precipitation; crystal structure; solid solution; heat treatment;

    机译：沉淀;晶体结构实在的方法;热处理;

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