| 合金成分对镍基合金激光熔覆涂层组织与性能的影响 |
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| 引用本文： | 董刚,严彪,邓琦林,余廷.合金成分对镍基合金激光熔覆涂层组织与性能的影响[J].材料科学与工程学报,2011(2):167-172. |
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| 作者姓名： | 董刚 严彪 邓琦林 余廷 |
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| 作者单位： | 同济大学材料科学与工程学院;上海交通大学机械与动力工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50675136,50375096) |
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| 摘 要： | 为了研究激光熔覆镍基合金涂层显微组织与性能之间的关系,本文选用Ni25、Ni45、Ni60镍基自熔性合金粉末作为熔覆材料,在同一工艺参数下在45#钢基体上制得Ni25、Ni45、Ni60合金激光熔覆涂层。利用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度计等方法对涂层的显微组织、物相组成、显微硬度等进行了研究。结果表明从Ni25到Ni60合金涂层,随着合金元素含量的提高,涂层微观组织逐渐由亚共晶转变为过共晶,γ-Ni奥氏体枝晶所占体积分数减少,尺寸细化,枝晶间的共晶组织和硬质相所占的体积分数增大,涂层和基体之间结合带的宽度越来越窄,熔覆层的显微硬度越来越高。Ni25、Ni45合金涂层的平均显微硬度分别为250HV和550HV左右,而Ni60合金涂层的平均硬度却高达750HV左右,为Ni25合金涂层的3倍。
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| 关 键 词： | 激光熔覆 镍基合金 涂层 结合带 显微硬度 |
Effects of the Alloy Composition on the Microstructure and Properties of Laser Cladding Ni-based Alloy Coatings |
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| DONG Gang,YAN Biao,DENG Qi-lin,YU Ting.Effects of the Alloy Composition on the Microstructure and Properties of Laser Cladding Ni-based Alloy Coatings[J].Journal of Materials Science and Engineering,2011(2):167-172. |
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| Authors: | DONG Gang YAN Biao DENG Qi-lin YU Ting |
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| Affiliation: | DONG Gang~1,2,YAN Biao~1,DENG Qi-lin~2,YU Ting~2(1.School of Materials Science and Engineering,Tongji University,Shanghai 200092,China,2.School of Mechanical and Power Engineering,Shanghai Jiaotong University,Shanghai 200030,China) |
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| Abstract: | In order to study the relationship between the microstructure and properties of the laser cladding Ni-based alloy coatings,Ni25,Ni45,Ni60 alloy coatings were fabricated on the substrate of 45# steel by laser cladding of the corresponding Ni-based self-fluxing alloy powders at the same process parameters.The microstructure,phase composition and microhardness have been analyzed by the scanning electron microscopy(SEM),X-ray diffractometry(XRD),energy dispersive X-ray spectroscopy(EDS) and microhardness meaure... |
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| Keywords: | laser cladding Ni-based alloy coating bonding zone microhardness |
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