( 郑州大学 物理工程学院 教育部材料物理重点实验室,
郑州 450052)
摘 要: 以电解低钛铝基合金为原料制备了A356合金， 研究了在535℃下固溶处理时间对合金共晶硅相细化、球化和分布的影响。 测量了硅颗粒的长径和短径， 计算了颗粒的直径和长短径比值等参数， 分析了上述参数随固溶时间的变化及其概率密度分布。 实验结果表明： 由该电解合金制备的A356合金经2~4h的固溶处理， 共晶硅就可得到较好的细化和球化效果，具有较高的分布集中度； A356合金的固溶处理时间可有效缩短。
关键字: 电解低钛铝基合金; A356合金; 固溶处理; 概率密度分布
A356 alloy made of electrolysis aluminum
（ Key Laboratory of Ministry of Education for Material Physics,
Physics Engineering School, Zhengzhou University, Zhengzhou 450052, China）
Abstract: The influence of solution treatment time at 535℃ on the refining and spheroidizing of eutectic silicon of Sr-modified A356 alloy made of electrolysis aluminum was studied. The long-radius and short-radius of silicon particles were detected, and the diameter and aspect ratio were measured. The variations and probability distributions of these parameters versus solution treatment time were also studied. It reveals that the optimal solution time for Sr-modified A356 alloy is 2-4h. After being treated for such a short time, the small and spherical silicon particles are distributed more evenly.
Key words: electrolyzed low-Ti Al-based alloys; A356 alloy; solution treatment; probability distribution
