汪晨,刘省,夏凯,李云翔,张作琦,龙威,胡心彬

• 1:湖北工业大学材料与化学工程学院
• 2:绿色轻工材料湖北省重点实验室
• 3:车用轻质材料与加工湖北省工程实验室
• 4:湖北航特装备制造股份有限公司

摘要(Abstract)：

采用Al-Sr-Ce中间合金对ZL101A铝合金进行改性处理，借助光学显微镜、扫描电镜、显微硬度计和电化学工作站等研究了添加不同含量的中间合金对铸态ZL101A铝合金组织和性能的影响。结果表明：当Al-Sr-Ce中间合金的添加量为0.3 mass%时，对ZL101A合金的改性效果最好，合金的晶粒细化明显，共晶Si的平均晶粒尺寸减小至0.94μm, α-Al的等效直径降低至23.7μm,合金的综合性能最佳，其抗拉强度、屈服强度、伸长率和硬度分别为156 MPa、105 MPa、5.0%和79.0 HV0.05;0.3 mass%Al-Sr-Ce中间合金改性的ZL101A合金的极化电阻是未改性时的2.87倍，这是由于添加中间合金显著减小了ZL101A合金腐蚀微电池中阴极相中的晶粒尺寸，同时含有稀土Ce的金属间化合物也相对增多，导致基体相阴极在腐蚀过程中的反应速率降低，导致其耐腐蚀性能较好。

关键词(KeyWords)： Al-Sr-Ce中间合金;腐蚀性能;力学性能;显微组织

Abstract:

Keywords:

基金项目(Foundation): 湖北省国际合作项目(2024EHA003);; 中央引导地方科技发展专项(2019ZYYD015);; 2023年荆门揭榜项目“车用高强铝合金大型关键零部件精密成型技术”

作者(Author): 汪晨,刘省,夏凯,李云翔,张作琦,龙威,胡心彬

DOI: 10.13289/j.issn.1009-6264.2025-0066

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