| 激光非晶化处理的研究 |
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| 引用本文： | 郑启光,李家镕,李再光,胡汉起. 激光非晶化处理的研究[J]. 华中科技大学学报(自然科学版), 1991, 0(4) |
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| 作者姓名： | 郑启光 李家镕 李再光 胡汉起 |
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| 作者单位： | 华中理工大学激光技术国家实验室(郑启光，李家镕，李再光)，北京科技大学(胡汉起) |
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| 摘 要： | 本文采用5～10kW高功率和高扫描速度的CO_2激光束在铸态共晶试样上第一次获得了激光非晶态.用金相显微镜和扫描电镜分析了激光非晶态熔区的组织特征及转变的过程.用显微硬度计检测了激光非晶化熔区的硬度分布,并研究了成分、冷却条件及不同激光工艺参数对熔区硬度分布的影响.用X射线衍射分析了激光熔区的表层白亮组织,确认了非晶态的存在.
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| 关 键 词： | 激光非晶态 共晶合金 迅速凝固的非晶 |
A Study of the Amorphous State on an Alloy Surface Processed by Laser |
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| Zheng Qiguang Li Jiarong Li Zaiguang Hu Hanqi. A Study of the Amorphous State on an Alloy Surface Processed by Laser[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 1991, 0(4) |
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| Authors: | Zheng Qiguang Li Jiarong Li Zaiguang Hu Hanqi |
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| Affiliation: | Zheng Qiguang Li Jiarong Li Zaiguang Hu Hanqi |
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| Abstract: | A new process for producing rapidly chilled metallurgical microstructure under reproducible cooling-rate conditions has been developed. A laser amorphous state on an eutectic alloy sample processed by 5-10 kw CM CO2 laser beam has been obtained. The relationships between the essential laser process variables, the laser power, spot size, scanning speed and so on and the amorphous characteristics are investigated. The laser amorphous micro-structure on the material surface has been observed by metalloscopy and scanning electron microscopy. Electron diffraction and microprobe studies have proved the formation of an amorphous state structure on a laser glazed surface. |
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| Keywords: | Laser amorphous state Eutectic alloys Rapidly solidified amor-phism |
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