Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (4): 293-296.

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OBSERVATION ON MICROSTRUCTURE OF LASER MELTED TRANSITION ZONE

CHENG Yongxing LI Genfu YU Shaoluo Shanghai University of Engineering Science,Shanghai,China Dept.No.5,Shanghai University of Engineering Science,Shanghai 200051,China   

  • 收稿日期:1990-08-25 修回日期:1990-08-25 出版日期:1990-08-25 发布日期:2009-10-10

OBSERVATION ON MICROSTRUCTURE OF LASER MELTED TRANSITION ZONE

CHENG Yongxing LI Genfu YU Shaoluo Shanghai University of Engineering Science,Shanghai,China Dept.No.5,Shanghai University of Engineering Science,Shanghai 200051,China   

  • Received:1990-08-25 Revised:1990-08-25 Online:1990-08-25 Published:2009-10-10

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摘要： <正> The surface alloying specimen was made from the steel 45 substrate overcoating byoxygen-acetylene flame spraying Fe-Cr-Ni alloy powder and laser remelting.The chemicalheterogeneity was clearly observed on the transition zone between the laser melted zone andheat-affected zone by means of EPMA,AES and SEM.This heterogeneity is rather seriousduring high temperature tempering,so the decarburization on the transition zone side and therecarburization on the melted zone side were found.

Abstract: The surface alloying specimen was made from the steel 45 substrate overcoating by oxygen-acetylene flame spraying Fe-Cr-Ni alloy powder and laser remelting.The chemical heterogeneity was clearly observed on the transition zone between the laser melted zone and heat-affected zone by means of EPMA,AES and SEM.This heterogeneity is rather serious during high temperature tempering,so the decarburization on the transition zone side and the recarburization on the melted zone side were found.

Key words: laser alloying, heterogenity, transition zone, microstructure