Extra-low oxygen rare earth alloy and use

Abstract

The invention relates to the technical field of the sound metal material manufacture and in particular to extra-low oxygen rare earth alloy and use. The rare earth metal content is 5%-95%, and the oxygen content O is less than or equal to 0.010% (weight percentage). The rare earth metal in the rare earth alloy is the single metal of lanthanum, cerium, praseodymium and neodymium or an arbitrarily-proportional mixture of more than two metals. The rare earth alloy is a metal mixture of the rare earth metal with one or more of iron, silicon, magnesium and aluminum. The extra-low oxygen rare earth alloy is capable of providing an additive to sound metal materials of equipment manufacture, such as steel, aluminum, magnesium alloy, and magnet, stably improving the performance of the metal material for equipment manufacture, and avoiding the negative effects of the rare earth additive generated in the materials, such as large occluded foreign substance and deterioration performance.

Description

technical field [0001] The invention relates to the field of manufacturing high-quality metal materials, in particular to an ultra-low oxygen rare earth alloy and its application. Background technique [0002] At present, the domestic rare earth metal implementation standards (such as GB / T 4153-2008, etc.) do not have high requirements on the purity of rare earth metal products, which are relatively broad, especially the oxygen content is not controlled, which cannot meet the requirements of rare earth metal additives for metal materials used in equipment manufacturing. quality requirements, leading to problems such as unstable performance and prominent negative effects. Therefore, it is very important to invent an ultra-low oxygen rare earth alloy as an additive for equipment manufacturing steel, magnesium alloy, aluminum alloy and magnetic materials. [0003] Specifically, the current national standards for rare earth metal products mainly emphasize the content of impurit...

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Problems solved by technology

[0003] Specifically, the current national standards for rare earth metal products mainly emphasize the content of impurity elements such as Mg, Zn, Pb, Fe, C, etc., and these trace elements are not very harmful to steel, and some are even the main elements in steel; Conversely, the oxygen element that has a greater impact on metal materials is not specified in the current rare earth metal standards and commercial products, resulting in the purity of rare earth metal products only one-sidedly focusing on the control of impurity elements such as Mg, Fe, C, etc. while ignoring the oxygen content control

Moreover, the current commercial rare earth products are completely electrolyzed and solidified in an open environment in contact with the air, so the oxygen content in rare earth metals is often as high as 0.1% or even higher, and oxygen generally combines with rare earths to form rare earth oxides. When this part of rare earth oxide is added to metal materials such as steel, it will exist in the form of inclusions, thereby deteriorating the performance of the material

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