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首页> 外文期刊>Metallurgical and Materials Transactions A >Correlation of Microstructure with Hardness and Wear Resistance of Carbide-Reinforced Ferrous Surface Composites Fabricated by High-Energy Electron-Beam Irradiation
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Correlation of Microstructure with Hardness and Wear Resistance of Carbide-Reinforced Ferrous Surface Composites Fabricated by High-Energy Electron-Beam Irradiation

机译：高能电子束辐照制备的硬质合金强化铁表面复合材料的显微组织与硬度和耐磨性的相关性

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摘要

The present study is concerned with the correlation of microstructure with hardness and wear resistance in carbide-reinforced ferrous surface composites fabricated by high-energy electron-beam irradiation. Three kinds of powder mixtures, 50TiC-50MgF2 (flux), 50Cr3C2-50MgF2, and 25TiC-25Cr3C2-50MgF2 (wt pct), were placed on a plain carbon steel substrate, which was then irradiated with electron beam. In the specimens fabricated with flux powders, the surface composite layer of about 3 mm in thickness was successfully formed without defects and contained a large amount (up to 11 vol pct) of TiC or Cr7C3 in the matrix. The hardness and wear resistance of the surface composite layer were directly increased by the hard carbides up to a maximum of 10 times with respect to the bare steel substrate. Particularly in the surface composite fabricated with TiC and Cr3C2 powders, the wear resistance was the highest because of the highest total carbide volume fraction and the matrix hardness.
机译：本研究涉及通过高能电子束辐照制备的碳化物增强的黑色金属表面复合材料的显微组织与硬度和耐磨性的相关性。 50TiC-50MgF2（焊剂），50Cr3 C2 -50MgF2 和25TiC-25Cr3 C2 -50MgF2三种粉末混合物<将（wt pct）放置在普通的碳钢基底上，然后用电子束辐照。在用助熔剂粉末制成的样品中，成功地形成了厚度约3 mm的表面复合层，没有缺陷，并且在其内部包含了大量（最高11 vol pct）TiC或Cr7 C3 。矩阵。相对于裸钢基材，表面复合层的硬度和耐磨性通过硬质合金直接提高至最大10倍。特别是在由TiC和Cr3 C2 粉末制成的表面复合材料中，由于最高的总碳化物体积分数和基体硬度，其耐磨性最高。

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  • 来源
    《Metallurgical and Materials Transactions A》 |2008年第11期|2626-2634|共9页
  • 作者

    Dukhyun Nam; Kyuhong Lee; Sunghak Lee;

  • 作者单位

    Center for Advanced Aerospace Materials Pohang University of Science and Technology Pohang 790-784 Korea;

    Center for Advanced Aerospace Materials Pohang University of Science and Technology Pohang 790-784 Korea;

    Center for Advanced Aerospace Materials Pohang University of Science and Technology Pohang 790-784 Korea;

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