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An ultrahigh strength steel with ultrafine-grained microstructure produced through superplastic forming

机译:通过超塑性成形生产具有超细晶粒组织的超高强度钢

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摘要

A novel procedure combined with superplastic forming was applied to produce an ultrahigh strength steel with ultrafine-grained microstructure. Although the hardness reached HRC65 at room temperature, the value of m = 0.38 and flow stress of 57 MPa were found during superplastic forming at 1023 K and strain rate of 10~(-4) s~(-1). Due to reasonable composition design, ultrahigh strength was ensured within a wide range of cooling rate after superplastic forming without the need of supplementary heat treatment.
机译:应用一种与超塑性成形相结合的新方法,生产出具有超细晶粒组织的超高强度钢。尽管在室温下硬度达到HRC65,但在1023 K和10〜(-4)s〜(-1)的超塑性成形过程中,发现m值为0.38,流动应力为57 MPa。由于合理的成分设计,在超塑性成形后的宽冷却速率范围内可确保超高强度,而无需进行额外的热处理。

著录项

  • 来源
    《Materials Science and Engineering》 |2010年第22期|P.5430-5434|共5页
  • 作者单位

    Key Laboratory for Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Key Laboratory for Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Key Laboratory for Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

    Key Laboratory for Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    superplasticity; martensite; ultrafine-grained microstructure; dynamic equilibrium;

    机译:超塑性马氏体超细晶粒组织动态平衡;

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