| 送粉式激光熔覆层质量与工艺参数之间的关系 |
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| 引用本文： | 张庆茂,钟敏霖,杨森,刘文今. 送粉式激光熔覆层质量与工艺参数之间的关系[J]. 焊接学报, 2001, 22(4): 51-54 |
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| 作者姓名： | 张庆茂 钟敏霖 杨森 刘文今 |
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| 作者单位： | 1. 清华大学机械系激光加工研究中心,解放军军需大学,
2. 清华大学机械系激光加工研究中心, |
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| 基金项目： | 清华大学 985基金，THSJZ基金资助项目 |
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| 摘 要： | 系统地研究了Ni基合金自动送粉激光熔覆工艺参数对熔覆层稀释率的影响规律。为解释送粉速率和扫描速度对稀释度的的影响，利用金相法检测了不同工艺条件下单道熔覆层的宏观参数，定量计算了LimL.C提出的单位质量熔覆材料的比能和单位时间实际输入的比能两个重要参数。利用单位质量熔覆材料的比能和单位时间实际输入的比能随工艺参数的变化规律，成功的解释了在激光参数一定的条件下稀释率随扫描速度的增加而减小，随送粉速率的增加而减小为进一步研究熔覆层的凝固行为、显微组织与工艺参数的关系奠定了理论基础。
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| 关 键 词： | 激光熔覆 稀释率 工艺参数 送粉末 熔覆层 |
| 文章编号： | 0253-360X(2001)04-51-04 |
| 收稿时间： | 2001-02-27 |
The Relationship Between the Processing Parameters and the Qualities of the Coatings Formed by Powder Feeding Laser Cladding |
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| ZHANG Qing-mao,ZHONG Min-lin,YANG Sen and LIU Wen-jin. The Relationship Between the Processing Parameters and the Qualities of the Coatings Formed by Powder Feeding Laser Cladding[J]. Transactions of The China Welding Institution, 2001, 22(4): 51-54 |
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| Authors: | ZHANG Qing-mao ZHONG Min-lin YANG Sen LIU Wen-jin |
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| Affiliation: | Laser Processing Research Center, Mechanical Engineering Dept., Tsinghua University, Beijing 100084, China,Laser Processing Research Center, Mechanical Engineering Dept., Tsinghua University, Beijing 100084, China,Laser Processing Research Center, Mechanical Engineering Dept., Tsinghua University, Beijing 100084, China and Laser Processing Research Center, Mechanical Engineering Dept., Tsinghua University, Beijing 100084, China |
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| Abstract: | The effects of the processing parameters of powder feeding laser cladding on the dilution of the Ni60A coatings were studied systematically.In order to explain the relationship between the powder feeding rate,scanning speed and the dilution,the concepts of the specific energy input E r and the specific energy E h formulated by L.C.Lim were introduced with their experimental measuring methods which have been proved successful.By varying the powder feeding rate and scanning speed under definite laser powder P and beam spot dimensions,coatings with different thickness were obtained .The calculation of the specific energy input E r and the specific energy E h was carried out on metallographical measurement.The explanation was given on the relationship between the processing parameters and the dilution .With the increasement of the powder feeding rate and scanning speed,the dilution becomes smaller.In the meantime,it is the theoretical foundation for further study on the relationship between the microstructure,mechanism of solidification and the processing parameters. |
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| Keywords: | laser cladding dilution processing parameter |
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