Laser Surface Remelting of Medium Ni-Cr Infinite Chilling Cast Iron Roll
来源期刊：材料热处理学报2004年第5期
论文作者：XIE Song-jing ZHANG Qun-li YAO Jian-hua
关键词：laser remelting; cast iron roll; microstructure; grain refinement; hardness; carrying capacity;
摘 要：Laser surface remelting of medium Ni-Cr infinite chilling cast iron was performed with a continuous wave CO2 laser beam with the power of 7 KW under the argon shielding. The microstructural analysis of the laser remelted layer by optical microscope shows that the laser remelted layer consists of three zones, which is the melting zone, the transition zone and the heat affected zone. The size of the dendrite of the melting zone is only in the 1/10 to 1/30 range of that of the substrate. The distribution of the hardness of the laser remelted layer was detected, and the carrying capacity of rolling steel was also field-tested. The results show that both the hardness of the remelted layer and the carrying capacity all increase,especially, the carrying capacity was 50% increased compared with the substrate.
XIE Song-jing1，ZHANG Qun-li1，YAO Jian-hua1
(1.Zhejiang University of Technology, Hangzhou, China)
摘要:Laser surface remelting of medium Ni-Cr infinite chilling cast iron was performed with a continuous wave CO2 laser beam with the power of 7 KW under the argon shielding. The microstructural analysis of the laser remelted layer by optical microscope shows that the laser remelted layer consists of three zones, which is the melting zone, the transition zone and the heat affected zone. The size of the dendrite of the melting zone is only in the 1/10 to 1/30 range of that of the substrate. The distribution of the hardness of the laser remelted layer was detected, and the carrying capacity of rolling steel was also field-tested. The results show that both the hardness of the remelted layer and the carrying capacity all increase,especially, the carrying capacity was 50% increased compared with the substrate.
关键词:laser remelting; cast iron roll; microstructure; grain refinement; hardness; carrying capacity;
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