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首页> 外文期刊>Materials Science and Engineering >Synchrotron micro-diffraction analysis of the microstructure of cryogenically treated high performance tool steels prior to and after tempering
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Synchrotron micro-diffraction analysis of the microstructure of cryogenically treated high performance tool steels prior to and after tempering

机译：在回火前后对经过深冷处理的高性能工具钢的组织进行同步加速微衍射分析

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摘要

The phase transformation and strain changes within cryogenically (-196℃) treated high performance tool steels (AISI H13) before and after tempering have been examined using both laboratory XRD and synchrotron micro-diffraction. The martensitic unit cell was found to have very low tetragonality as expected for low carbon steel. Tempering resulted in the diffusion of excess carbon out of the martensite phase and consequent unit cell shrinkage. In addition on tempering the martensite became more homogeneous as compared to the same samples prior to tempering. For cryogenically treated samples, the effect was most pronounced for the rapidly cooled sample which was the least homogenous sample prior to tempering but was the most homogenous sample after tempering. This suggests that the considerable degree of disorder resulting from rapid cryogenic cooling results in the beneficial release of micro-stresses on tempering thus possibly resulting in the improved wear resistance and durability observed for cryogenically treated tool steels.
机译：使用实验室XRD和同步加速器微衍射技术研究了在回火前后经过低温（-196℃）处理的高性能工具钢（AISI H13）中的相变和应变变化。如低碳钢所预期的，发现马氏体晶胞具有非常低的四方性。回火导致过量的碳从马氏体相中扩散出来，从而导致晶胞收缩。另外，与回火之前的相同样品相比，回火时马氏体变得更均匀。对于经低温处理的样品，这种效果对于快速冷却的样品最为明显，该样品在回火之前是最不均匀的样品，但在回火之后是最均匀的样品。这表明由快速低温冷却引起的相当程度的无序性导致回火时微应力的有益释放，因此可能导致经低温处理的工具钢具有改善的耐磨性和耐久性。

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  • 来源
    《Materials Science and Engineering》 |2010年第26期|p.6822-6830|共9页
  • 作者

    N. Xu; G.P. Cavallaro; A.R. Gerson;

  • 作者单位

    Applied Centre for Structural and Synchrotron Studies, Mawson Lakes Blvd. University of South Australia, Mawson Lakes, South Australia 5095, Australia;

    Applied Centre for Structural and Synchrotron Studies, Mawson Lakes Blvd. University of South Australia, Mawson Lakes, South Australia 5095, Australia;

    Applied Centre for Structural and Synchrotron Studies, Mawson Lakes Blvd. University of South Australia, Mawson Lakes, South Australia 5095, Australia;

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  • 正文语种 eng
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  • 关键词

    synchrotron X-ray diffraction; cryogenic treatment; steel; martensite; X-ray diffraction;

    机译：同步加速器X射线衍射;低温处理钢;马氏体X射线衍射;

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