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Influence of Copper on the Hot Ductility of 20CrMnTi Steel

机译：铜对20CrMnTi钢热延展性的影响

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摘要

The hot ductility of 20CrMnTi steel with x% copper (x = 0, 0.34) was investigated. Results show that copper can reduce its hot ductility, but there is no significant copper-segregation at the boundary tested by EPMA. The average copper content at grain boundaries and substrate is 0.352% and 0.318% respectively in steel containing 0.34% copper tensile-tested at 950 ℃. The fracture morphology was examined with SEM and many small and shallow dimples were found on the fracture of steel with copper, and fine copper sulfide was found from carbon extraction replicas using TEM. Additionally, adding 0.34% copper caused an increase in the dynamic recrystalliza-tion temperature from 950 ℃ to 1000 ℃, which indicates that copper can retard the dynamic recrystallization (DRX) of austenite. The detrimental influence of copper on hot ductility of 20CrMnTi steel is due mainly to the fine copper sulfide in the steel and its retarding the DRX.
机译：研究了含x％铜（x = 0，0.34）的20CrMnTi钢的热延展性。结果表明，铜可以降低其热延展性，但在EPMA测试的边界处没有明显的铜偏析。在950℃进行拉伸试验的含0.34％铜的钢中，晶界和基体的平均铜含量分别为0.352％和0.318％。用SEM观察了断口的形貌，在含铜的钢的断口上发现了许多小而浅的凹坑，并用TEM从碳提取样品中发现了细小的硫化铜。另外，添加0.34％的铜会导致动态再结晶温度从950℃升高到1000℃，这表明铜可以延缓奥氏体的动态再结晶（DRX）。铜对20CrMnTi钢热延展性的不利影响主要是由于钢中的细硫化铜及其延缓了DRX。

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  • 来源
    《High temperature materials and processes》 |2015年第1期|13-17|共5页
  • 作者

    Hong-bing Peng; Wei-qing Chen; Lie Chen; Dong Guo;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    Xining Special Steel Co. Ltd., Xining 810005, China;

    Xining Special Steel Co. Ltd., Xining 810005, 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    copper; 20CrMnTi steel; hot ductility;

    机译：铜;20CrMnTi钢;热延展性;

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