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金属学报  1988, Vol. 24 Issue (6): 415-418    
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激光合金化熔化区电子显微分析
程永兴;李根富;俞少罗;王惠敏
上海工程技术大学五系;上海工程技术大学;上海工程技术大学;中国船舶工业总公司第十一研究所
ELECTRON MICROANALYSIS FOR LASER MELTED ZONE IN 45 STEEL WITH Fe-Ni-Cr COATING
Cheng Yongxing;LI Genfu;YU Shaoluo;WANG Huimin Shanghai University of Engineering and technology NO. 11 Institute of China State Shipbuilding Corp.; Shanghai Manuscript received 29 July; 1987; revised manuscript 3 January; 1988
引用本文:

程永兴;李根富;俞少罗;王惠敏. 激光合金化熔化区电子显微分析[J]. 金属学报, 1988, 24(6): 415-418.
, , , . ELECTRON MICROANALYSIS FOR LASER MELTED ZONE IN 45 STEEL WITH Fe-Ni-Cr COATING[J]. Acta Metall Sin, 1988, 24(6): 415-418.

全文: PDF(686 KB)  
摘要: 本文采用5kW横流二氧化碳激光器进行了Fe-Ni-Cr合金涂层和45号钢基体合金化处理,用电子显微术分析了熔化区的特征,揭示了所谓激光“亮带”的本质。结果表明,“亮带”属于熔化区;是平面晶一个纵切断面,其宽度等于平面晶的高度,随扫描速度的增加和激光功率的减小而变窄。
关键词 激光合金化快速熔凝平面晶    
Abstract:In this paper the Fe-Ni-Cr coated layer has been alloyed with 45steel base metal by transverse flow type CO_2 gas laser with maxmum output of5 kW. The characteristics of the melted zone and the essence of the "bright band"has been investigated using the electron microscopy. The results show that the"bright band" belongs to the melted zone and is a vertical section of the planecrystal. The width of the "bright band" equals the height of the plane crystal,which decreases with the increase of laser beam scanning rate and the decrease oflaser power. This has been explained in terms of constitutional supercooling G/R.
Key wordslaser alloying    rapid solidification    plane crystal
收稿日期: 1988-06-18     
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