| ZL111 Al合金激光熔覆中的非晶组织及其半定量测定 |
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| 引用本文： | 李现勤,程兆谷,夏金安,许国良,梁工英.ZL111 Al合金激光熔覆中的非晶组织及其半定量测定[J].金属学报,1999(9). |
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| 作者姓名： | 李现勤 程兆谷 夏金安 许国良 梁工英 |
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| 作者单位： | 中国科学院上海光学精密机械研究所!上海，201800(李现勤，程兆谷，夏金安，许国良)，西安交通大学机械工程学院!西安，710049(梁工英) |
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| 基金项目： | 西北工业大学凝固技术国家重点实验室基金 |
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| 摘 要： | 利用5kWCO2激光器激光熔覆Al合金表面的Ni－Cr－Al涂层，SEM与TEM分析结果表明，在激光熔覆层中的非晶组织呈空间扭曲薄片或杉叶状，它们分别存在于熔覆层颗粒间白色网状组织与颗粒中,利用差热分析（DTA）半定量测定熔覆层中的非晶含量，功率密度，扫描速度对非晶含量有较大的影响
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| 关 键 词： | Al合金 激光熔覆 非晶 差热分析 |
THE AMORPHOUS STRUCTURES AND THEIR SEMIQUANTITAIVE DETERMINATION IN LASER CLADDING ON ZL111 ALUMINUM ALLOY |
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| LI Xianqin, CHENG Zhaogu, XIA Jin'an, XU Guoliang.THE AMORPHOUS STRUCTURES AND THEIR SEMIQUANTITAIVE DETERMINATION IN LASER CLADDING ON ZL111 ALUMINUM ALLOY[J].Acta Metallurgica Sinica,1999(9). |
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| Authors: | LI Xianqin CHENG Zhaogu XIA Jin'an XU Guoliang |
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| Affiliation: | LI Xianqin, CHENG Zhaogu, XIA Jin'an, XU GuoliangShanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences,Shanghai 201800LIANG GongyingMechanical and Engineering Institute,Xi'an Jiaotong University,Xi'an 710049Correspondent: LI |
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| Abstract: | The coating zone (Ni-Cr-Al) on an aluminum alloy surface was clad by a 5kW CO2 laser.The observation of SEM and TEM revealed that there are amorphous structures in the laser cladding. Theamorphous structures have two different morphologies. One is space curved plate-like, which exists in thewhite web-like structures. The other is fir leaf-like, which exists in the grain-like structures. Differentialthermal analysis (DTA) was used to semi- quantitatively determine the content of amorphous structures inlaser-cladding. It was found that the power density and the scanning velocity affect obviously the contentof amorphous structures. |
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| Keywords: | aluminum alloy laser cladding amorphous structure differential thermal analysis |
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