Method for manufacturing wires and bar of rare earth metal with high lanthanum being mixed into and wires and bar of rare earth alloy containing aluminum, barium, calcium and magnesium

Abstract

A technology for preparing the high-La RE metal mixture wire or rod and RE alloy wire or rod containing Al, Ba, Ca and Mg includes such steps as loading the cast RE ingot or block and KCl as convering agent into the crucible in RE electric furnace, adding Al, Ba, Ca and Mg in intermediate alloy mode, removing slag, casting ingot at 1000-1150 deg.C, preheating the ingot and die, and die pressing by hydraulic press.

Description

1. Background technology: [0001] The invention relates to the technical field of rare earth metal thermal processing, in particular to a production method of high-lanthanum mixed rare earth metal wires and rods and rare earth alloy wires and rods containing aluminum, barium, calcium and magnesium. [0002] At present, most of the rare earth additives used in steelmaking are cerium-rich (Ce≥45%) mixed rare earth metal wires. Although rare earth metals have strong desulfurization and deoxidation capabilities, due to the rare earth-oxygen-sulfur inclusions produced in the steelmaking process, they have a high melting point and a large specificity, and are difficult to gather and float to remove, thereby reducing the purity of molten steel. Moreover, with the development of steelmaking technology, the desulfurization technology of molten steel has been greatly improved, and the sulfur content in molten steel can reach 0.005%, or even lower. Therefore, the problem of reducing the ...

AI Technical Summary

Problems solved by technology

Because rare earth metals have high chemical activity and are easy to oxidize, special equipment for vacuum induction furnaces is often used, which is cumbersome to operate, complicated in process, and high in cost.

There is also the use of coke oven heating method to melt mixed rare earth metals, but in this process, the temperature is difficult to control, resulting in poor product quality

Then, the production method of mixed rare earth metal wire and rod is improved, (seeing the manufacture method of mixed rare earth metal wire and rod, application number 91105686, 6), product quality is improved on the original basis, but still cannot provide high-quality The products of mixed rare earth metal wires and rods cannot meet the requirements of steelmaking technology