陈忠平,杨扬,娄花芬

• 1:中南大学材料科学与工程学院
• 2:中铝科学技术研究院有限公司

摘要(Abstract)：

采用电磁水平连铸技术制备了650 mm宽幅锡磷青铜合金铸坯，研究电磁参数对其水平连铸组织和铸造性能的影响。利用光学显微镜、扫描电镜、能谱仪和密度测试等研究了施加电磁前后锡磷青铜铸坯组织和性能的变化。结果表明：当电磁参数为20 A、20 Hz时，能有效地抑制锡磷青铜铸坯的锡元素偏析，使锡元素偏析标准差由0.5%下降至0.12%;施加电磁场后，铸坯晶粒组织由柱状晶向等轴晶转变，结合弱面消失，疏松、缩孔等微观铸造缺陷减少，铸坯致密度增加，从而有利于提升锡磷青铜铸坯表面和内部质量；施加电磁场后，铸坯的晶粒组织细化，微观偏析得到一定程度抑制，使得均匀化退火更充分，均匀化退火后铸坯的平均晶粒尺寸由未施加电磁场的700μm下降至260μm。

关键词(KeyWords)： 电磁;锡磷青铜;水平连铸;组织;铸造性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2021YFB3803102)

作者(Author): 陈忠平,杨扬,娄花芬

DOI: 10.13289/j.issn.1009-6264.2024-0361

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