东北大学学报(自然科学版)
東北大學學報(自然科學版)
동북대학학보(자연과학판)
Journal of Northeastern University (Natural Science)
2015年
12期
1719-1723
,共5页
稀土 La%Al -La 中间合金%铸造铝合金%铸造锌合金%力学性能
稀土 La%Al -La 中間閤金%鑄造鋁閤金%鑄造鋅閤金%力學性能
희토 La%Al -La 중간합금%주조려합금%주조자합금%역학성능
rare earth La%Al-La master alloy%cast Al alloy%cast Zn alloy%mechanical property
利用 Al -La 中间合金制备了 AlSi10Cu0.2Mg0.2Mn -xLa 和 ZnAl12Cu1(Mg)-xLa 铸造合金,考察了不同的 La 含量对合金组织和抗拉强度、伸长率、冲击强度等性能的影响.研究结果表明:微量稀土La 可以细化合金的晶粒,改变 Si 相晶粒大小和形状.与未添加 La 的合金相比,含有微量稀土 La 的AlSi10Cu0.2Mg0.2Mn -xLa 合金和 ZnAl12Cu1(Mg )-xLa 合金具有更优良的力学性能.当AlSi10Cu0.2Mg0.2Mn 铸造合金中 La 添加量为0.15%(质量分数)时,铸造合金的伸长率增加2.7倍.含有0.1%(质量分数)La 的 ZnAl12Cu1(Mg)-xLa 合金抗拉强度和伸长率相比于未添加稀土 La 的合金,分别增强1.3倍和3.2倍.含有0.3%(质量分数)La 时 ZnAl12Cu1(Mg)-xLa 的硬度增强1.8倍,但冲击强度是含有0.15%(质量分数)La 时最高.综合考虑 ZnAl12Cu1(Mg)-xLa 铸造合金的机械性能,稀土 La 的最优添加量为0.1%~0.2%(质量分数).
利用 Al -La 中間閤金製備瞭 AlSi10Cu0.2Mg0.2Mn -xLa 和 ZnAl12Cu1(Mg)-xLa 鑄造閤金,攷察瞭不同的 La 含量對閤金組織和抗拉彊度、伸長率、遲擊彊度等性能的影響.研究結果錶明:微量稀土La 可以細化閤金的晶粒,改變 Si 相晶粒大小和形狀.與未添加 La 的閤金相比,含有微量稀土 La 的AlSi10Cu0.2Mg0.2Mn -xLa 閤金和 ZnAl12Cu1(Mg )-xLa 閤金具有更優良的力學性能.噹AlSi10Cu0.2Mg0.2Mn 鑄造閤金中 La 添加量為0.15%(質量分數)時,鑄造閤金的伸長率增加2.7倍.含有0.1%(質量分數)La 的 ZnAl12Cu1(Mg)-xLa 閤金抗拉彊度和伸長率相比于未添加稀土 La 的閤金,分彆增彊1.3倍和3.2倍.含有0.3%(質量分數)La 時 ZnAl12Cu1(Mg)-xLa 的硬度增彊1.8倍,但遲擊彊度是含有0.15%(質量分數)La 時最高.綜閤攷慮 ZnAl12Cu1(Mg)-xLa 鑄造閤金的機械性能,稀土 La 的最優添加量為0.1%~0.2%(質量分數).
이용 Al -La 중간합금제비료 AlSi10Cu0.2Mg0.2Mn -xLa 화 ZnAl12Cu1(Mg)-xLa 주조합금,고찰료불동적 La 함량대합금조직화항랍강도、신장솔、충격강도등성능적영향.연구결과표명:미량희토La 가이세화합금적정립,개변 Si 상정립대소화형상.여미첨가 La 적합금상비,함유미량희토 La 적AlSi10Cu0.2Mg0.2Mn -xLa 합금화 ZnAl12Cu1(Mg )-xLa 합금구유경우량적역학성능.당AlSi10Cu0.2Mg0.2Mn 주조합금중 La 첨가량위0.15%(질량분수)시,주조합금적신장솔증가2.7배.함유0.1%(질량분수)La 적 ZnAl12Cu1(Mg)-xLa 합금항랍강도화신장솔상비우미첨가희토 La 적합금,분별증강1.3배화3.2배.함유0.3%(질량분수)La 시 ZnAl12Cu1(Mg)-xLa 적경도증강1.8배,단충격강도시함유0.15%(질량분수)La 시최고.종합고필 ZnAl12Cu1(Mg)-xLa 주조합금적궤계성능,희토 La 적최우첨가량위0.1%~0.2%(질량분수).
AlSi10Cu0.2Mg0.2Mn-xLa and ZnAl12Cu1 (Mg)-xLa casting alloy were prepared by Al-La master alloy.The effect of La content on the microstructure,tensile strength,elongation and impact strength of these alloys were investigated.The results indicated that the crystalline grain of alloys could be refined by addition of La element and the size and shape of Si phase particle were also modified.Compared with the previous alloys,the mechanical properties of AlSi10Cu0.2Mg0.2Mn-xLa alloy and ZnAl12Cu1 (Mg)-xLa alloy containing traces of La were relatively improved.When 0.15wt% of La was added in AlSi10Cu0.2Mg0.2Mn casting alloy, the elongation could increase to 2.7 times.The tensile strength and elongation of ZnAl12Cu1 (Mg)-xLa containing 0.1wt% of La was increased to 1.3 and 3.2 times,respectively.The hardness of ZnAl12Cu1 (Mg)-xLa containing 0.3wt% of La was increased to 1.8 times while ZnAl12Cu1 (Mg )-xLa containing 0.15wt% of La exhibited the maximum impact strength. Comprehensively considering the mechanical properties of ZnAl12Cu1 (Mg)-xLa casting alloy, the optimal addition content of La was controlled in the range of 0.1wt%~0.2wt%.