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首页> 外文期刊>ISIJ international >Effect of Molybdenum Content on the Combined Effect of Boron and Molybdenum on Hardenability of Low-Carbon Boron-Added Steels
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Effect of Molybdenum Content on the Combined Effect of Boron and Molybdenum on Hardenability of Low-Carbon Boron-Added Steels

机译：钼含量对硼和钼联合作用对低碳硼添加钢淬透性的影响

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摘要

Addition of Mo to boron-alloyed steel improves the hardenability by suppressing the precipitation of Fe_(23)(C, B)_6; this is known as the combined Mo-B effect. However, the maximum Mo content for the combined effect to occur is still unclear because previous studies on this effect mainly investigated steels with a Mo content of less than 0.80%. Therefore, in this study, 0.15% C steels containing more than 0.80% Mo were investigated to determine the maximum content required for the occurrence of the combined Mo-B effect. The combined effect increased with increasing Mo content up to 0.75%, after which it decreased. The optimum B content decreased from 12 to 11 ppm with increasing Mo content from 1.0% to 1.5%. In 1.0%Mo-20 ppm B steel and 1.5%Mo-20 ppm B steel, Mo_2FeB_2 precipitated instead of Fe_(23)(C, B)_6. Thermodynamic calculations revealed that the temperature at which Mo_2FeB_2 precipitation started increased with increasing Mo content in 20 ppm B steel. Moreover, Mo_2FeB_2 could precipitate even at a reheating temperature of 950℃. Thus, it is suggested that the maximum Mo content for the combined Mo-B effect on hardenability is determined by the precipitation of Mo_2FeB_2 mainly during reheating.
机译：在硼合金钢中添加Mo可以抑制Fe_（23）（C，B）_6的析出，从而提高淬透性。这就是所谓的Mo-B效应。但是，对于产生复合作用的最大Mo含量仍然不清楚，因为以前对此影响的研究主要研究Mo含量小于0.80％的钢。因此，在这项研究中，对含Mo量超过0.80％的0.15％C钢进行了研究，以确定发生复合Mo-B效应所需的最大含量。随着钼含量的增加，复合效应增加，达到0.75％，然后降低。最佳的B含量从12 ppm降低到11 ppm，而Mo含量从1.0％增加到1.5％。在1.0％Mo-20 ppm B钢和1.5％Mo-20 ppm B钢中，析出了Mo_2FeB_2而不是Fe_（23）（C，B）_6。热力学计算表明，在20 ppm B钢中，Mo_2FeB_2开始析出的温度随Mo含量的增加而增加。另外，即使在950℃的再加热温度下，Mo_2FeB_2也可能析出。因此，建议用于组合的Mo-B对可淬性的最大影响的Mo含量主要由Mo_2FeB_2的沉淀主要在再加热过程中决定。

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  • 来源
    《ISIJ international》 |2018年第3期|551-560|共10页
  • 作者

    Kyohei ISHIKAWA; Hirofumi NAKAMURA; Ryuichi HOMMA; Masaaki FUJIOKA; Manabu HOSHINO;

  • 作者单位

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

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

    Nippon Steel & Sumitomo Metal Corporation, Kimitsu R&D Laboratories, 1-1 Kimitsu, Chiba, 299-1141 Japan;

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

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

    hardenability; boron; segregation; molybdenum; combined effect;

    机译：淬透性硼;隔离钼;联合效应;

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