为了研究硼化物(KBF4)和锶(Sr)对再生Al-Si合金中富铁相的影响,分别采用X射线荧光光谱分析仪(XRF)对试样进行成分分析,应用光学显微镜(OM)、扫描电镜(SEM)和能谱仪(EDS)对试样显微组织进行形貌观察和相成分分析.结果表明,KBF4不能起到降铁作用,但促使β-Fe相向初生α-Fe相转变,当B加入量达到0.75％时,初生α-Fe相周围出现了汉字状α-Fe相;Sr会促使β-Fe相向汉字状α-Fe相转变,当Sr加入量为0.3％时,β-Fe相几乎消失,同时,Sr对针状β-Fe相有溶解碎裂作用.
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