The Rare Earth Aluminium Alloys in China

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.     

稀土铝合金的研究进展

在铝合金中加入稀土元素,可以细化组织,显著提高铝合金的性能,本文阐述了稀土对铝合金组织和性能的影响,为实际应用提供参考。     

稀土在铝及铝合金中的作用

依据文献综合介绍了稀土对铝及铝合金的力学性能、热学性能、光学性能、电学性能、耐腐蚀性能和工艺性能的影响,探讨了稀土在铝及铝合金中净化、变质和合金化作用的微观机理,讨论了稀土铝合金发展中存在的问题。     

反相流动注射分光光度法测定稀土铝合金中的稀土总量

本文以二溴—氯偶氮氯磷作显色剂,建立了反相流动注射分析测定稀土总量的方法.实验表明,本方法简便,快速,且钙、铁的允许量较手工法约提高一个数量级.方法用于稀土铝合金中的稀土总量的测定,结果满意.     

Blistering Problems Observed in Strain Induced Melt Activated Aluminium Alloys

High temperature oxidation of aluminium alloys has been a major problem of heat treatment processes. The theory suggests that degradation as a result of long time exposure to high temperatures in the presence of water vapour results in oxidation process which releases hydrogen that diffuses into metal to form hydrogen pores; thus leading to subsurface porosity or blisters. In this study, an examination of the blister formation during Strain Induced Melt Activated process of aluminium alloys were carried out and oxides (i.e. bifilms) were found in the morphology of blisters. Thus, it is suggested that the blistering occurs in the presence of bifilms in aluminium alloys.     

环烷酸萃取体系中单一稀土和铝的分配比及分离系数的研究

对不同萃取剂皂化值、料液酸度和铝浓度条件下,单一稀土和铝在环烷酸体系中的分配比和分离系数进行研究,结构表明料液的酸度较高时,皂化值为0.35 M环烷酸体系可以获得铝和稀土相对更高的分离系数及更好的分离效果。铝离子浓度较低时,料液酸度较高的条件下仍可实现稀土和铝的较好分离,而铝离子浓度较高时(150 mmol/L),料液酸度较高不利于稀土和铝的分离。     

稀土合金包芯线代替铝条在沸腾钢生产中的应用研究

利用稀土对氧和硫有强亲和力的特性，结合包钢生产的Ｑ_（２３５Ｆ）、Ｈ_（０８Ａ（Ｅ））二个钢种，用稀土合金包芯线代替铝条，进行两次工业试验研究，观察其制止沸腾钢“上呕”的作用，取得与刺铝相似的效果。检验分析数据表明，在低倍组织、力学性能、夹杂形状等方面，刺稀土合金包芯线轧坯优于中注管刺铝轧坯。     

Effect of Ho-doping on microstructure and magnetostriction of TbDyFe alloys

Tb0.3Dy0.7HoxFe1.95 (x=0.00, 0.05, 0.10, 0.15, 0.20, 0.35, 0.50, 0.65) quaternary alloys were prepared by arc-melting and followed by annealing. The phases present and structure of the alloys were determined using a D8-Advance X-ray diffractometer. The magnetostriction of the alloys was studied by standard strain gauge technique. The dependence of Ho content on the structure, magnetostriction and density of the alloys was investigated in detail. The research results showed that Ho-doping did not change MgCu2-type cubic Laves structure in Tb0.3Dy0.7Fe1.95. When Ho content x≤0.2, rich rare earth phase presented in the alloys increased and magnetostriction of the alloys reduced evidently with increasing x, but for alloys with x>0.2, the content of rich rare earth phase started to reduce and the magnetostriction increased quickly, especially at low magnetic field in the alloy with x=0.65 due to separation of rich rare earth phases on the surface of the alloy.     

稀土对铝导线导电性能和力学性能的影响

本文研究了工业生产条件下，稀土铈、镧及混俣稀土对电工用铝导线导电性能和力学性能的影响。结果表明，稀土铈可显著提高强度，稀土镧可显著提高导电性。实验证明，稀土元素的添加量选择在０．２－０．３Ｗｔ％的最佳。     

Evolution of Hydrogen Storage Alloys Prepared by Special Methods

Microstructure characteristics and electrochemical properties of hydrogen storage alloys prepared by gas atomization, melt spinning and strip casting respectively were outlined.The advantages, disadvantages and research development of the above methods for preparing hydrogen storage alloys were explained.The strip casting is a new special means for preparing AB5 rare earth hydrogen storage alloys of high performance and low cost, and the study of the strip casting for preparing hydrogen storage alloys is presented specially.     

Research and Development of Rare Earth Advanced Materials in China

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Development of Strip Casting Technology in Rare Earth Permanent Magnet Alloys and Hydrogen Storage Alloys in China

The SC technique is now being applied widely in material preparation, especially in rare earth functional materials in virtue of its advanced process and high performance product. The applications of SC technique in rare earth permanent magnet alloys and hydrogen storage alloys were analyzed integrative, on the basis of summary of SC technique development in this paper. The paper mainly includes development history of SC technology, effect of SC technology on alloy microstructure, application of SC technology in RE storage hydrogen alloy and sintered Nd-Fe-B alloy, development of SC equipment and SC product industry. At the same time, the paper points out the existing problem of SC products.     

易拉罐用铝合金材料的研究

对新型包装用铝罐与罐盖为同一成分的合金，利用正交设计的方法进行了研制，确定了含镁量为1．3％、含锰量为1．5％左右、均匀化退火10h，合金具有较高的强度和塑性，适当添加稀土元素铈可改善合金的性前。     

稀土镁合金的研究进展

从防氧化、除氢、合金流动性、细化品粒与强化作用等方面概括稀土元素在镁合金中的作用，综述稀土镁中间合金，铸造、变形稀土镁合金与快速凝固稀土镁合金的最新研究动向与成果，并简介发展非品镁合金与镁合金的超塑性研究的巨大潜力。     

稀土基AB5型复合贮氢合金的研究进展

制备复合合金是改善贮氢合金性能的一条有效途径。本文对国内外各种多元以及多相稀土复合贮氢材料的研究现状进行了综合评述，主要涉及了AB5-AB2型复合贮氢合金和镁基-AB5型纳米复合贮氢合金的进展。阐述了各种复合材料的组成，微观结构以及电化学性能等，并展望了今后复合贮氢材料的研究方向为应用基础性的研究，如复合作用机制、对热力学性能的影响等方面的研究。     

稀土和铝在皂化氯代环烷酸体系中分配比及分离系数的研究

分别对萃取剂皂化值为0.35mol/L、0.40mol/L,不同料液酸度、铝浓度条件下氯化稀土溶液在皂化氯代环烷酸萃取体系中的稀土和铝分配比及分离系数进行研究,表明当料液中含有中、高浓度铝时,皂化值为0.35mol/L氯化环烷酸体系可以在较高酸度的条件下获得铝和稀土相对更高的分离系数及更好的分离效果.实际生产中可通过提高料液酸度实现铝和稀土的有效分离,同时抑制其它非稀土杂质的萃取,更有利于降低产品中杂质的含量.     

我国独具特色的稀土电工铝和铝稀土合金

中国稀土铝导体和铝稀土合金研究，开发和应用过程概况，稀土导电铝和稀土铝合金的特性；铝稀土合金应用领域逐步扩大，稀土消费量迅速增加；制取铝稀土合金系列的新思想和新工艺过程；稀土添加剂在铝和铝合金中的作用；某些值得注意的问题。     

低钴稀土系贮氢合金的研究

通过在稀土系贮氢合金中添加不同含量的Fe或Cu元素,部分替代合金中Co的方法,研究低钴贮氢合金电化学性能上的差异.结果表明:由于合金组成和化学计量比的不同,同样是添加了Fe或Cu的合金在电化学性能上表现不同,但总体说,含Cu低钴贮氢合金容量和倍率放电性能较好,含Fe低钴贮氢合金有较好的循环稳定性,过化学计量比的合金循环稳定性要好于欠化学计量比的合金.     

Effect of RE on Cast Structure and Properties of High Manganese Aluminium Bronze

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Effect of Cerium on the Properties of CuPNiSn Amorphous Alloys

CuPNiSn amorphous alloys are good brazing materials at medium temperature for replacementof silver bearing brazing materials.The crystallization temperature,wettability,tensile strength of Cu-Cujoints and the microstructure of joints for three compositional series are reported.Some rare earth elementswere added in two series.It has been found that grains are refined and the tensile strengths increase as in-creasing rare earth content.The results also show that the brittle fracture turns to plastic one for the jointswith reducing amount of(Ni+Sn),and the tensile strength is increased.