Praseodymium-neodymium-iron alloy and preparation method thereof

Abstract

The invention discloses a praseodymium-neodymium-iron alloy. The praseodymium-neodymium-iron alloy comprises 0-95wt% of praseodymium and neodymium and the balance iron and inevitable impurities of which the total content is less than 0.5wt%, wherein the content of oxygen is less than or equal to 0.01wt%, the content of carbon is less than or equal to 0.01wt%, the content of phosphorus is less than or equal to 0.01wt%, and the content of sulfur is less than or equal to 0.005wt%. The invention further discloses a preparation method of the praseodymium-neodymium-iron alloy. The praseodymium-neodymium-iron alloy prepared through the method is uniform in composition, small in segregation, low in impurity content, high in rare-earth yield, low in cost, and free of pollution; and the praseodymium-neodymium-iron alloy is high in rare-earth yield and remarkable in effect when applied to rare-earth steel, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a rare earth metal material, in particular to a praseodymium neodymium iron alloy and a preparation method thereof. Background technique [0002] At present, steel is the largest metal structural material and is widely used in construction, energy, transportation, aerospace and other fields. The application and research of rare earths in steel have also developed rapidly. The addition of rare earths to molten steel can desulfurize, deoxidize, change the shape of inclusions, etc., and can improve the plasticity, stamping performance, wear resistance and welding performance of steel. Various rare earth steels such as rare earth steel plates for automobiles, die steels, rails, etc. have been widely used. [0003] The addition method of rare earth in the production process of rare earth steel has always been the focus of scientific research. The existing addition methods include wire feeding method, cored wire, rare earth iron int...

AI Technical Summary

Problems solved by technology

This method is the method commonly used at present, and its process technology is simple, can make multi-element master alloy or application alloy, but also has deficiency: 1) rare earth metal easily local concentration is too high in molten iron, produces segregation; 2) this method The raw materials used are rare earth metals, especially for medium and heavy rare earth metals, the preparation process is complicated and the cost is high; 3) The melting temperature is relatively high. Since rare earth metals and pure iron are used as raw materials, the melting temperature requirements are high

This method has low production cost and simple process, but it also has the following defects: the distribution of rare earth and iron in the alloy fluctuates greatly, it is difficult to control, and the distribution error is as high as 3%-5%, which affects product consistency

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