MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AlSi10Mg PERMANENT MOULD AND HIGH PRESSURE VACUUM DIE CASTINGS
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AlSi10Mg PERMANENT MOULD AND HIGH PRESSURE VACUUM DIE CASTINGS
复制标题
AlSi10Mg永久模及高压真空压铸件的显微组织和力学性能
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
X.
中科院分区：
文献类型：
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作者：
Z. Zhang;M.;F. Breton;X.
分析比较了AlSi 10 Mg合金金属型和高压真空压铸的微观组织。两种铸件的铸态组织主要由共晶硅颗粒、初生Mg2Si和富Fe金属间化合物相组成。对具有独特特征和不同结构的HPVD铸件表面层进行了细致的表征。粉末冶金试样中微观结构相的尺寸沿着截面的变化小于高压蒸汽沉积试样，但粉末冶金试样中微观结构相的尺寸远大于高压蒸汽沉积试样。在铸态和T6处理条件下评价了粉末冶金和高压蒸汽沉积试样的力学性能。在铸态条件下，HPVD铸件的拉伸性能明显优于粉末冶金铸件。T6热处理显著提高了粉末冶金铸件的抗拉强度，而对高压蒸汽处理铸件的抗拉强度影响不大。
The microstructures of AlSi10Mg foundry alloy in permanent mould (PM) and high pressure vacuum die (HPVD) castings were analyzed and compared. The as-cast microstructures of two castings mainly consisted of eutectic silicon particles, primary Mg2Si and Fe-rich intermetallic phases. The surface layer in HPVD castings, which has a unique feature and different structures, was carefully characterized. The dimension variation of microstructural phases along the cross section in PM samples is less than that in HPVD samples, although the size of microstructural phases in PM samples was much larger than that in HPVD samples. The mechanical properties of PM and HPVD samples were evaluated on as-cast and T6treated conditions. The tensile properties of HPVD castings are remarkable better than those of PM castings on the as-cast condition. The T6 heat treatment greatly improves the tensile strength of PM castings while it has limited impact on the tensile strength of HPVD castings.