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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 |
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Cite this article:
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. ELECTRON MICROANALYSIS FOR LASER MELTED ZONE IN 45 STEEL WITH Fe-Ni-Cr COATING. Acta Metall Sin, 1988, 24(6): 415-418.
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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.
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Received: 18 June 1988
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1 Boeittinger W J. In: Kear B H, Giessen B C, Cohen M eds., Rapidly Solidified Amorphous and Crystalline Alloys, New York: North-Holland, 1982: 15 2 Koster U, Herold U, Dister K. In: Kear B H, Giessen B, Cohen M eds., Rapidly Solidified Amorphous and Crystalline Alloys, New York: North-Holland, 1982: 179 3 Cantor B. In: Kear B H, Giessen B C, Cohen M eds., Rapidly Solidified Amorphous and Crystalline Alloys, New York: North-Holland, 1982: 317 4 Mordike B L, Be?gmann H W. In: Rapidly Solidified Amorphous and Crystalline Alloys, New York: No th-Holland, 1982: 463 5 Nilsson Y. In: Kear B H, Giessen B C, Cohen M eds., Rapidly Solidified Amorphous and Crystalline Alloys, New York: North-Holland, 1982: 517 6 Greenwald L E, Breinan E M, Kear B H. Laser-Solid Interactions, and Laser Processing, Am, Inst of Physics., New York, 1978: 189 7 胡赓祥,钱苗根.金属学,上海科学技术出版社,1982:172< |
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