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首页> 外文会议>International Congress on Applications of Lasers and Electro-Optics >LASER SURFACE ALLOYING (LSA) OF ALUMINIUM (AA 1200) WITH TiB_2 FOR HARDNESS IMPROVEMENT
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LASER SURFACE ALLOYING (LSA) OF ALUMINIUM (AA 1200) WITH TiB_2 FOR HARDNESS IMPROVEMENT

机译：激光表面合金化（LSA）铝（AA 1200），具有TIB_2的硬度改善

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The present work deals with the development of Aluminium metal matrix composite (MMC) using TiB_2 reinforcement. The aim is to improve the microhardness property of the substrate. The surface of the aluminium was sand blasted to improve its laser energy absorption and simultaneous deposition of the ceramic powder onto the surface of the substrate was carried out using a Rofin Nd: YAG laser with an Argon shield environment to prevention oxidation. The laser processing parameters were varied. The characterization of the alloyed surfaces MMC was carried out by Optical Microscopy (OPM), Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). The microstructure of the alloyed layer shows that the ceramic powder was well dispersed within the Al-matrix. Good metallurgical bonds were evident. Microhardness measurements were carried out. The maximum depth attained was 1.17 mm. There was a microhardness increase from that of substrate which is 24±0.4 HV to that of the MMC layer 58.0±0.2 HV.
机译：本工作涉及使用TIB_2加固的铝金属基质复合材料（MMC）的发展。目的是改善基材的显微硬度特性。铝的表面被喷砂喷砂，以改善其激光能量吸收，并使用Rofin Nd：YAG激光用氩气屏蔽环境进行陶瓷粉末在基板的表面上进行陶瓷粉末进行预防氧化。激光加工参数变化。通过光学显微镜（OPM），扫描电子显微镜（SEM）和X射线衍射（XRD）进行合金表面MMC的表征。合金层的微观结构表明，陶瓷粉末良好地分散在Al - 基质中。良好的冶金键是明显的。进行了微硬度测量。达到的最大深度为1.17毫米。基板的微硬度增加，底物为24±0.4HV至MMC层58.0±0.2HV。

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