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首页> 外文期刊>ISIJ international >Inversed Phosphorus Segregation in Twin Roll Cast Strips for Improvement of Mechanical Properties and Weathering Resistance
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Inversed Phosphorus Segregation in Twin Roll Cast Strips for Improvement of Mechanical Properties and Weathering Resistance

机译：双辊铸带中的逆磷偏析，以改善机械性能和耐候性

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摘要

In the present paper, twin roll strip casting was applied to fabricating the strips of low carbon steels containing different P contents. P was spontaneously segregated near strip surfaces by the deformation in mushy zone during strip casting. Uniform surface layers enriched in P can be formed after subsequent processing of cold rolling and annealing, which can be used as surface coatings for the improvement of both weathering resistance and mechanical properties including toughness and elongation. In terms of plasticity, the elongation of conventional strips started drastically decreasing with P content beyond 0.15% by weight. By contrast, the elongation of the cast strips containing 0.26% P remained at the level of about 30%, with the tolerated ability of P being increased by about 0.1 % by weight by twin roll strip casting. The ductile-brittle transition temperatures (DBTT) for the cast strips after cold rolling and annealing were measured to be lower than those for the conventional strips after hot rolling, cold rolling and annealing by 10-15℃. For 120 cycles of corrosion exposure, the weight gains of the 0.15 and 0.26P cast strips were reduced by more than 30% as compared with that on the conventional strip containing 0.08% R It has been demonstrated that phosphate enriched layers could be formed beneath the corrosion scales of the 0.15 and 0.26P cast strips after cold rolling and annealing, which reduced the corrosion rate and improved the corrosion resistance.
机译：在本文中，采用双辊薄带连铸来制造含不同P含量的低碳钢带。在带钢铸造过程中，由于糊状区的变形，P自发地在带材表面偏析。可以在随后的冷轧和退火处理之后形成富含P的均匀表面层，该表面层可以用作表面涂层，以改善耐候性以及包括韧性和伸长率在内的机械性能。就可塑性而言，当P含量超过0.15重量％时，常规条的伸长率开始急剧下降。相比之下，含0.26％P的铸造带材的伸长率保持在约30％的水平，通过双辊带钢铸造，P的耐受能力提高了约0.1重量％。经测量，冷轧和退火后的铸钢带的延性脆性转变温度（DBTT）低于热轧，冷轧和退火后的常规钢带的脆性转变温度10-15℃。与暴露于0.08％R的常规铸带相比，经过120次腐蚀暴露，0.15和0.26P铸带的重量增加减少了30％以上。事实证明，在铸铁下方可以形成富含磷酸盐的层。冷轧和退火后的0.15和0.26P铸钢带的锈蚀等级降低了腐蚀速率并提高了耐腐蚀性。

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  • 来源
    《ISIJ international》 |2010年第4期|p.531-539|共9页
  • 作者

    Zhenyu LIU; Guoping ZHOU; Yiqing QIU; Guodong WANG;

  • 作者单位

    State Key Lab of Rolling Technologies and Automation, Northeastern University, RO. Box 105, Shenyang Liaoning Province, 110004 R R. China;

    State Key Lab of Rolling Technologies and Automation, Northeastern University, RO. Box 105, Shenyang Liaoning Province, 110004 R R. China;

    State Key Lab of Rolling Technologies and Automation, Northeastern University, RO. Box 105, Shenyang Liaoning Province, 110004 R R. China;

    State Key Lab of Rolling Technologies and Automation, Northeastern University, RO. Box 105, Shenyang Liaoning Province, 110004 R R. China;

  • 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

    twin roll strip casting; phosphorus; elongation; toughness; weathering resistance;

    机译：双辊薄带连铸;磷;伸长;韧性;耐候性;

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