Researches on Mischmetal Preventing Lead Segregation in High Lead Bronze
来源期刊：Journal of Rare Earths1991年第2期
论文作者：李道韫 徐连棠 战松江 付念新
文章页码：134 - 138
摘 要：<正> The effect of mischmetal addition on lead segregation in high lead bronze（grade ZQPb25-5）is studied inthis paper.The testing results confirm that 0.5 to 1.0% misehmetal addition can effectively prevent lead fromgravity and inverse segregation.The results of preventing lead from segregation respectively by mischmetal andnickel are also compared in the paper.The mischmetal addition in high lead bronze is distributed in the coppermatrix mainly in the form of a compound which promotes early precipitation and refinement of α-dendrites,thus restraining the Pb-rich melt from either sinking to the bottom or escaping to the surface layer of thecasting.As a result,the tendency of lead segregation is significantly decreased.Proper addition of mischmetalcan also improve the mechanical properties,especially the ductility of high lead bronze.In addition,the contentsof tin in high lead bronze can partially be substituted by mischmetal addition.
李道韫，徐连棠，战松江，付念新
摘 要：<正> The effect of mischmetal addition on lead segregation in high lead bronze（grade ZQPb25-5）is studied inthis paper.The testing results confirm that 0.5 to 1.0% misehmetal addition can effectively prevent lead fromgravity and inverse segregation.The results of preventing lead from segregation respectively by mischmetal andnickel are also compared in the paper.The mischmetal addition in high lead bronze is distributed in the coppermatrix mainly in the form of a compound which promotes early precipitation and refinement of α-dendrites,thus restraining the Pb-rich melt from either sinking to the bottom or escaping to the surface layer of thecasting.As a result,the tendency of lead segregation is significantly decreased.Proper addition of mischmetalcan also improve the mechanical properties,especially the ductility of high lead bronze.In addition,the contentsof tin in high lead bronze can partially be substituted by mischmetal addition.
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