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Method for producing rare-earth metal screw-rod

A production method and technology of rare earth metals, which are applied in the production field of rare earth metal wire rods, can solve the problems of poor plastic toughness of rare earth metal wires, uneven distribution of rare earth metals, and low purity, so as to improve wire feeding efficiency and plastic toughness Good, the effect of improving the purity

Inactive Publication Date: 2003-08-27
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main problem of this method is that in the process of continuous casting wire feeding, broken wires often occur, resulting in uneven distribution of the fed rare earth metals. due to high

Method used

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Embodiment

[0031] According to the production method of the rare earth metal wire rods described in the present invention, three batches of rare earth metal wire rods are prepared according to the processes of batching, smelting and casting, and hot extrusion. The chemical compositions of the three batches of ingredients are listed in Table 1. The chemical composition of the three batches of modified mold flux used in smelting is shown in Table 2. Immediately cast into ingots after smelting, both smelting and casting are carried out under protective atmosphere. When the ingot is extruded, the heating temperature of the ingot, the preheating temperature of the die and the speed of the wire rod are shown in Table 3. After the rare earth metal wire rod was extruded into a finished product, the chemical composition of the product was measured, and the results are listed in Table 4. At the same time, the strength and ductility of the final product were also measured, and the measurement res...

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Abstract

The invention belongs to smelting and processing field, especially field, especially refers to the smelting and process of rare earth metal. The craft process includes adjuvant, smelting and casting ingot and heat squeeze forming. The rare earth metal material of La 40-90%, Y 30-60% and Ce 45-58% mixes with compound rare earth respectively, smelting and casting ingot is carries on under protection of gas, when being smelted, adds in pre-smelted protection residues, the residues are chloride series and oxide serial. The pressure mould is to be preheated to 450-650 deg.C, the rare earth metal casting ingot is to be heated to 250-450 deg.C and controls the outputting speed of silk when pressing.

Description

technical field [0001] The invention belongs to the field of metal smelting and processing, and in particular relates to the production of rare earth metal wires and rods. Background technique [0002] In the field of iron and steel materials, rare earth metals are used more and more widely as trace elements or additives. Usually, adding rare earth elements to steel can reduce the content of P, S and inclusions in steel and purify grain boundaries. At the same time, rare earth elements can also change the shape and distribution of inclusions in steel, and even change the composition of inclusions. These effects are all It can effectively improve the plasticity and toughness of steel and improve the processing performance. [0003] There are two typical methods for adding rare earth metals to steel, one is to die-cast and hang rare earth metal rods; the other is to use a wire feeder to gradually feed rare earth metal wires into the crystallizer or intermediate In the packag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04C22C1/02C22C28/00C22C35/00
CPCY02P10/20
Inventor 王龙妹杜挺刘浏
Owner CENT IRON & STEEL RES INST