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对混合氧化稀土LiF-BaF2-REF3体系中的溶解度进行了研究,考察了熔体组在和渖度对氧化稀土溶解度的影响。实验结果证明:在该体系中,900-10401℃温度范围内氧化稀土溶解度为2%-4%wt。 相似文献
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单向凝固Fe—C—Si共晶合金的组织与性能 总被引:2,自引:0,他引:2
本文研究了单向凝固Fe-C-Si共晶合金的凝固速度ν,对组织及纵向力学性能的影响,得出ν=2.0 μm/s时,抗拉强度和延伸率均出现峰值;考察了硅含量和基体组织对性能的影响,并分析了拉伸断口形貌。 相似文献
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复合稀土银合金组织与性能的研究 总被引:4,自引:0,他引:4
制备了几种复合稀土银合金,实验研究了复合稀土银合金的组织与性能,提出复合稀土对银合金性能影响有互补性,复合稀土元素在铸态下偏聚且共生在枝晶边界上,形成Ag,RE金属间化合物及氧化物,对银合金有显著的强化用和细化晶粒作用,并提高了合金的再结晶温度,增强了合金的耐热性,这种合金经冷变形后退火,可以消除枝晶偏析,含稀土的第2相化合物呈团絮状分布在再结晶组织上,这有利于改善银合金的组织与性能。 相似文献
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Al-Ti-C对铝合金组织性能影响的分析 总被引:1,自引:0,他引:1
以较为常用的6063铝合金为研究对象,文章分析了Al—Ti—C中间合金对其组织及性能的影响,并从理论上分析了Al—Ti—C的作用机理。结果表明,Al—Ti—C对合金组织具有强烈的细化作用,同时对其性能也有一定影响。最后对实验结果进行了分析与总结。 相似文献
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The influence of rare earth lanthanum and cerium on impact property of structural alloy steel with extra low sulfur and oxygen was studied by impact test and microanalysis. The results showed that rare earths increased impact power of the steel when their contents were about 0.005%. Proper addition of rare earths could purify grain boundaries and decrease amount of inclusions, and reduced the possibility of crack growth along grain boundaries and through inclusions. Therefore, such steel could absorb more crack growth energy while it was impacted. However, if the content of rare earths is excessive, the grain boundary would be weakened and brittle-hard phosphates and Fe-RE intermetallic would be formed, which worsened impact toughness of steel. 相似文献
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The development and application of rare earth aluminium alloys began in the 1960s in China.The represen-tative work was the usage of rare earth metals in alumino-silicon alloys for piston.In the 1970s,its initial stage.rare earths were used in enhanced AIMgSi alloy transmission line and FeCr Al alloy electric heating wire.Duringits developing period(from 1980 to 1985),in the field of smelting,after the electrolytic preparation of RE-Almaster alloys at relatively low temperature,a new technique was invented that rare earth compounds were addedto commercial aluminium electrowinning cell to produce RE-Al alloys directly.It opened the way for the appli-cation of rare earths in industry on a large scale.In the field of application,it was found that the addition ofrare earths could improve the conductivity and processing property of aluminium alloys.The application of rareearths to aluminium conductors and products had made a breakthrough progress.Since 1986,its golden age,thestudy,production and application of aluminium alloys containing rare earths have been developing at an amazingspeed,running neck and neck with the application of RE in agriculture,textile dyeing,and cast iron. 相似文献
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ImprovingWearResistanceoftheNibaseThermalSprayWeldingCoatingUsingRareEarthsZhaiGuangjie(翟光杰)(InstituteofPhysics,AcademicaSi... 相似文献
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王冰 《有色金属材料与工程》1991,(3)
本工作采用平面磨耗法对添加稀土的LF_(21)铝合金电解着色膜层耐磨性进行了较为系统的研究。结果表明:电解液浓度、电流密度、温度、时间、稀土含量等对电解着色膜耐磨性能均有较大影响。稀土的加入可以明显地提高耐磨性能,含量以0.30%为宜。 相似文献
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研究了添加微量稀土氧化物对WC-8Ni硬质合金物理机械性能的影响。在用X射线。射、扫描电镜及透射电镜等手段对含稀土WC-8Ni合金进行显微结构分析的基础上,探讨了稀土在合金中的分布状态、对组织结构的影响及其强化机理。井指出,通过添加微量稀土氧化物,可使WC-8Ni硬质合金的物理机械性能接近和达到YG8的水平。 相似文献
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1 ExperimentalThedeoxidizediron ,chromium ironal loy ,molybdenum ironandcarbonpowderswereusedasrawmaterialswhosesizeisabout40 μm ,anddifferentamountofrareearthele mentCewasadded .Theexperimentcomposi tionsareshowninTable 1 .Thepowderandthemillingballweresealed… 相似文献
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The influence of rare earth on the friction and wear characteristics of magnesium alloy AZ91 and AM60 were studied. The results show that the wear resistance properties of rare earth magnesium alloys are better than those of matrix alloy under the testing conditions. The anti-wear behaviour of AZ91 alloy is much better than that of AM60 alloy. In dry sliding pmcess, magnesium alloys undergo a transition from mild wear to severe wear. The addition of rare earths refine the structure of alloys, improve the comprehensive behaviors of magnesium alloys,increase the stability of oxidation films on worn surfaces,enhance the loading ability of rare earth magnesium alloys,and delay the transition from mild wear to sevre wear effectively. 相似文献