Mechanism of Action of Rare Earths in High Effective Fe Powder Welding Rods
来源期刊：JOURNAL OF RARE EARTHS2007年增刊第1期
论文作者：Li Jianguo Liu Yan Han Yongquan Huang Lihong Yao Qinghu
Key words：high effective Fe powder welding rod; weld craft; rare earths;
Abstract: The optimum coating composition of alkali Fe powder welding rods was designed by orthogonal experiment with mix rates. A new kind of effective RE-Fe powder welding rod was prepared which could be used at the condition of direct and indirect current. The arc characteristics and stabilities of effective Fe powder welding rods containing RE were analyzed by HANNOVER analyzer. The efficiency of Fe powder welding rods was tested by weighting method. It wag found that the stability of Fe powder welding rods Wag improved when it was added with rare earths. The results of impact experiment at low temperatures and SEM analysis on impact break showed that the grain was refined, the welding joint was cleaned, and the mechanical properties of joint was enhanced with proper RE content. It was provided with good processing property for this effective RE-Fe powder welding rod, and its efficiency could arrive at 180%.
Li Jianguo1，Liu Yan1，Han Yongquan1，Huang Lihong1，Yao Qinghu1
(1.College of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China)
Abstract:The optimum coating composition of alkali Fe powder welding rods was designed by orthogonal experiment with mix rates. A new kind of effective RE-Fe powder welding rod was prepared which could be used at the condition of direct and indirect current. The arc characteristics and stabilities of effective Fe powder welding rods containing RE were analyzed by HANNOVER analyzer. The efficiency of Fe powder welding rods was tested by weighting method. It wag found that the stability of Fe powder welding rods Wag improved when it was added with rare earths. The results of impact experiment at low temperatures and SEM analysis on impact break showed that the grain was refined, the welding joint was cleaned, and the mechanical properties of joint was enhanced with proper RE content. It was provided with good processing property for this effective RE-Fe powder welding rod, and its efficiency could arrive at 180%.
Key words:high effective Fe powder welding rod; weld craft; rare earths;
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