1.江西省建筑技术促进中心,南昌 360100
2.广东省科学院新材料研究所,广州 510650
3.广州致远新材料科技有限公司,广州 510620
4.江门市愈锋新材料科技有限公司,江门 529159
肖三保,男,1986年出生,高级工程师,E-mail:376729396@qq.com
宋东福,男,1984年出生,高级工程师,E-mail: 375462908@163.com
收稿:2025-06-11,
修回:2025-07-24,
录用:2025-09-16,
纸质出版:2026-10-20
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XIAO S B,SONG D F,SONG Q F,et al. Microstructure and properties of AlSi10MnMg(Fe) alloy with high Fe content composite modified by Al-Sr-RE[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 590-1 595.
肖三保,宋东福,宋秋福,等. 基于Al-Sr-RE复合变质高Fe含量AlSi10MnMg(Fe)合金的组织和性能[J]. 特种铸造及有色合金,2026,46(10):1 590-1 595. DOI: 10.15980/j.tzzz.H20250010.
XIAO S B,SONG D F,SONG Q F,et al. Microstructure and properties of AlSi10MnMg(Fe) alloy with high Fe content composite modified by Al-Sr-RE[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 590-1 595. DOI: 10.15980/j.tzzz.H20250010.
提出Al-Sr-RE复合变质高Fe含量AlSi10MnMg(Fe)合金的第二相,以实现再生铝合金的保级利用。采用金相显微镜(OM)、扫描电镜(SEM)和力学试验设备研究了高Fe含量AlSi10MnMg(Fe)合金的组织和性能。结果表明,Al-Sr-Ce复合变质剂主要由Al
4
Sr和Al
11
Ce
3
相组成,Sr和Ce互溶。重力铸造时,富Fe相主要以细长的针状富Fe相为主,而压铸时则以细小颗粒状和短棒状富Fe相为主。富Fe相类型由单一的
δ
-Al
3
(Fe,Mn)Si
2
转变成
δ
-Al
3
(Fe,Mn)Si
2
和
π
-AlMgSiFe的混合类型。重力铸造合金的伸长率略低于行业内的低Fe合金,但压铸合金的综合力学性能达到行业内先进指标。大量长条针状富Fe相是导致重力铸造高Fe合金塑性降低的主要原因。Al-Sr-Ce有利于改善共晶Si和富Fe相的形貌,有助于提高合金的塑性。
Al-Sr-RE modified second phase in high-Fe content AlSi10MnMg(Fe) alloys was proposed to achieve grade-preserving utilization of recycled aluminum alloys. The microstructure and properties of high-Fe content AlSi10MnMg(Fe) alloys were systematically investigated using optical microscopy (OM), scanning electron microscopy (SEM), and mechanical testing equipment. The results indicate that Al-Sr-Ce composite modifier primarily consists of Al
4
Sr and Al
11
Ce
3
phases, and Sr and Ce form mutual solution. During gravity casting, Fe-rich phase is dominated by long needle-like morphology, which comprises fine granular and short rod-like iron-rich phases in die casting. The type of iron-rich phase is converted from single
δ
-Al
3
(Fe,Mn)Si
2
phase to mixture of
δ
-Al
3
(Fe,Mn)Si
2
and
π
-AlMgSiFe phases. The elongation of alloy by gravity casting is slightly lower than that of low-Fe industrial al
loys, while comprehensive mechanical properties of die-cast alloy reach advanced level. The reduced plasticity of high-Fe gravity-cast alloy is attributed to large amounts of long needle-like Fe-rich phases. Al-Sr-Ce is beneficial to modifying morphology of eutectic silicon and Fe-rich phases, thereby enhancing the plasticity.
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