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Vacuum smelting quick condensation furnace

A vacuum melting and rapid-setting technology, applied in furnaces, crucible furnaces, furnace types, etc., which can solve the problems of slow cooling rate, flake bonding, large grain size, etc.

Inactive Publication Date: 2004-08-04
沈阳中北真空技术有限公司
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AI Technical Summary

Problems solved by technology

Although this vacuum smelting quick-setting furnace solves the problems of uneven alloy composition and unsuitability for mass production in general vacuum smelting furnaces, it also has the following disadvantages:
[0003] 1. After being thrown into thin slices, the cooling rate is relatively slow using a turntable, and the microstructure of the as-cast quick-setting alloy flakes is not ideal, for example: the grain size uniformity of columnar crystals is poor, and the width of columnar crystals is not uniform ; relatively large grain size due to relatively slow cooling rate
[0004] 2. Due to the slow cooling rate, the flakes thrown out have not completely solidified before entering the receiver, so the flakes are bonded together, forming agglomeration and agglomeration
[0005] 3. Due to the rapid rotation of the turntable, the flakes are broken, and the flakes obtained are relatively broken
[0006] 4. Since the microstructure of quick-setting flakes is relatively poor, there are agglomeration and agglomeration phenomena and the flakes are relatively fine, so the products made from this flakes, such as: Nd-Fe-B permanent magnets, hydrogen storage alloys, etc. relatively low performance

Method used

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Embodiment Construction

[0011] As can be seen in Figure 1, after the alloy material is added to the crucible 1, the vacuum furnace shell 3 is closed, the vacuum system 2 is started, and the entire furnace body is in a vacuum state or under a protective atmosphere. The heater coil 11 starts to generate heat. Under the medium frequency induction, the alloy material in the crucible 1 is heated and melted. By adjusting the angle of the crucible 1, the smelted alloy melt flows to the tundish 10 and lands on the rotor set under the side of the tundish. On the wheel 4, there is a circulating cooling medium in the runner 4, so that the alloy melt is rapidly cooled to form alloy flakes, and the flake alloy flakes are thrown into the drum 9 under the action of the centrifugal force generated by the rotating runner 4, and the drum 9 The outer wall is covered with a cooling device 6 and the inner wall is fixed with a spiral piece 7 for stirring, which can make the alloy flakes in the drum 9 turn continuously, so ...

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Abstract

A vacuum smelting furnace with quick setting-up function is composed of vacuumizing system, vacuum case of furnace, induction heating coil, crucible, tundish, rotary wheel, and the drum with internal spiral plate and external cooler wrapping it. It can be used to prepare permanent-magnet RE Nd-Fe-B alloy material and hydrogen-bearing RE alloy material. Its advantages are quick and uniform cooling, good microstructure, and high performance.

Description

technical field [0001] The invention relates to a vacuum melting quick-setting furnace for producing NdFeB rare earth permanent magnet alloy materials and rare earth hydrogen storage alloy materials. Background technique [0002] In the past ten years, the vacuum smelting technology has developed rapidly. The patent (application number 01241236.8) applied by the inventor has announced a vacuum smelting quick-setting furnace, which is currently used for the production of NdFeB rare earth permanent magnet alloy materials and rare earth hydrogen storage alloy materials. A vacuum melting quick-setting furnace mainly used in the furnace, which is mainly composed of a vacuum system, a feeder, a vacuum furnace shell, a crucible, a tundish, a cooling roller and a turntable. Its NdFeB rare earth permanent magnet alloy material and rare earth hydrogen storage alloy material are completed in the vacuum smelting quick-setting furnace: in a vacuum environment or a protective atmosphere, ...

Claims

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Application Information

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IPC IPC(8): B22D11/06B22F9/08F27B14/04
Inventor 孙宝玉
Owner 沈阳中北真空技术有限公司
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