共查询到17条相似文献,搜索用时 156 毫秒
1.
2.
铝熔体中夹杂物的电磁分离 总被引:1,自引:0,他引:1
根据电磁分离铝熔体中的非金属夹杂物数值模拟结果,设计并制作了电磁感应线圈和分离器。感应线圈的设计参数为长度250mm,长度方向匝数为125匝,高度100mm;高度方向的匝数为2匝,宽度为100mm,宽度方向的匝数为2匝,两线圈距离为40mm。分离器内腔尺寸为80mm×20mm×80mm,分离通道尺寸为37.5m×20mm×80mm。研究了铝熔体温度、时间和线圈电流对分离铝熔体中非金属夹杂物的影响,结果表明,当铝熔体温度为740℃,分离时间为3min以上,线圈通入20A电流时,电磁分离夹杂物的效果较好。 相似文献
3.
通过向Cu-10Sn合金中加入1%的Cu2O颗粒制备了含有SnxOy合金的材料,随后利用高频磁场的电磁分离技术成功将铜合金中的氧化物夹杂分离到分离器边缘。研究了分离器直径、磁感应强度、分离时间对分离效果的影响。试验结果表明,当分离器直径为12mm,磁感应强度为60mT,分离时间为60s时,氧化物夹杂的分离效果最好。 相似文献
4.
5.
6.
7.
铝硅合金中富铁相杂质的电磁分离 总被引:2,自引:1,他引:2
采用熔体过热处理与加锰相结合的方法来改善铝硅合金中富铁相杂质的析出形态,在此基础上对不同含锰量的铝硅合金进行了电磁分离净化。试验结果表明,采用熔体过热处理与加金属锰相结合的方法可使铝硅合金中的富铁相变为尺寸均匀的颗粒状,通过控制锰含量可使富铁相的直径控制在10~40μm之间;铝硅合金中富铁相电磁分离处理的效果取决于Mn和Fe的含量比,当Mn和Fe的摩尔含量比为1.1时,富铁相杂质的一次电磁分离效率为65%。 相似文献
8.
9.
10.
11.
A lum inum alloy plays a very im portant role in m odern society [1]. As the advancem ent of m odern society, m aterial industry faces the challenge of sustainable developm entand society needs alum inum products ofbetter quality.H oweverthe finalalum inum products always contain certain am ountofinclusions [2] com ing from raw m aterialas wellasproduction process.These inclusionsare usually sm all in size and theirdensities are alm ostthe sam e as thatofthe m etalm elt.Asaresult,itisdifficult… 相似文献
12.
Electromagnetic separation of non-metallic inclusions from Al-Si melt is studied by theoretical analysis and experiments on self-designed electromagnetic separation apparatus. Metallographs and LECO Image Analysis System were used to analyze the content of alumina in aluminum alloy before and after electromagnetic separation. It is seen that removal effciency increases with the increase of electromagnetic force (EMF) and diameter of inclusion particles while decreases with the increase of melt velocity and height of separator. All alumina particles with diamete of 14μm have been removed successfully from the melt. 相似文献
13.
Yan-Yi Xu Jing Zhao Chun-Yang Ye Yan-Ping Shen Xin-Cheng Miao Yun-Hu Zhang Qi-Jie Zhai 《金属学报(英文版)》2022,35(2):254-274
Distributions of electromagnetic fields and induced forced flow inside a metal melt are crucial to understand the grain refinement of the metal driven by pulsed magneto-oscillation (PMO). In the present study, PMO-induced electromagnetic fields and forced flow in Ga-20wt%In-12wt%Sn liquid metal have been systematically investigated by performing numerical simulations and corresponding experimental measurements. The numerical simulations have been confirmed by magnetic and melt flow measurements. According to the simulated distribution of electromagnetic fields under the application of PMO, the strongest magnetic field, electric eddy current and Lorentz force with inward radial direction inside the melt are concentrated adjacent the sidewall of cylindrical melt at the cross section of middle height of coil. As a result, a global forced flow throughout the whole cylindrical column filled with Ga-20wt%In-12wt%Sn melt is initiated with a flow structure of two pair of symmetric vortex ring. The PMO-induced electromagnetic fields and forced flow in Al-7wt%Si melt have been numerically simulated. The contribution of electromagnetic fields and forced flow to the grain refinement of Al-7wt%Si alloy under the application of PMO is discussed. It indicates that the forced flow may play a key role in the grain size reduction. 相似文献
14.
15.
From the viewpoint of energy reduction, the recovery of metal scrap and its recycling have been rising as an important global subject. However, it is difficult to remove deleterious impurities, which have detrimental effects on the mechanical properties. In particular, it is difficult to eliminate nonmetallic inclusions such as alumina(Al2O3) in aluminum alloys when they are subject to recycling. In this study, an experiment on the elimination of the impurities in the melt by imposing electromagnetic force to molten aluminum was conducted. The principle behind these electromagnetic methods is that as the electromagnetic force induced in metal scarcely acts on non-metallic inclusions due to low electric conductivity, the non-metallic inclusions are moved to the direction opposite the electromagnetic force and can be separated from the melt. The prediction based on the theoretical analyses was confirmed through the visualization of the polystyrene particle motion in an NaCl aqueous solution. We also proposed optimum electromagnetic conditions such as current density, magnetic field intensity and particle size for eliminating the inclusion particles continuously found through numerical analysis and experiments. 相似文献
16.
电磁铸造移动磁场发生器磁场分布规律及其作用分析 总被引:3,自引:1,他引:3
研究了用于电磁铸造的移动磁场发生器上磁场强度变化及其对金属产生的力的作用.结果表明,磁感应强度分量By和Bz的变化趋势相反.By的存在使金属流动充型过程中产生表面凹坑型缺陷,Bz明显提高金属液流动速度,而在提高充型能力的同时,会使金属液流前端截面减小而形成反向充填,引发冷隔缺陷.铁磁性上模可以减弱By、增强Bz,提高表面质量.金属在移动磁场中受到的力与其投影面积有关,而且存在临界投影面积,小于该临界值后,电磁力不足以拉动该金属. 相似文献