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Rare earth permanent magnetic alloy continuous sintering equipment

A technology of sintering equipment and rare earth permanent magnets, which is applied in the field of permanent magnet alloy processing equipment and technology

Active Publication Date: 2014-05-21
SHENYANG CHINANORTH VACUUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the internal heating furnace can only be heated in a vacuum state, the heating speed is slow, and the temperature uniformity of long-term use becomes poor; because the heating and cooling process must be repeated for each furnace, the consumption of inert gas is large, and the energy consumption is large, which is harmful to the heater and Pollution caused by the heat insulation layer, the service life of the sintering furnace is greatly shortened

Method used

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  • Rare earth permanent magnetic alloy continuous sintering equipment
  • Rare earth permanent magnetic alloy continuous sintering equipment
  • Rare earth permanent magnetic alloy continuous sintering equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1As shown, the rare earth permanent magnet alloy continuous sintering equipment of the present invention consists of a preparation box 37, a glove box 39, and a sealed transfer box 41 arranged in sequence, and a lock chamber 10, a charging chamber 44, a preheating chamber 16, and a heating chamber arranged in sequence. The degassing chamber 26, the sintering chamber 29, the cooling chamber 34, the transmission device of each chamber, the return frame and the vacuuming device of each chamber are composed. Each chamber is connected by an isolation valve between chambers. Connection; the transmission device of each room is set on the upper part of each room, and the return frame with the transmission device is installed outside each room, and the transmission device of each room, the return frame and the transmission device on it together form a suspended conveying system 1; the return line The frame is connected with the transition frames 3, 36 at...

Embodiment 2

[0065] Embodiment 2: The mechanical structure of this example is the same as that of Example 1, the difference is: the limitation of parameters in the sintering process of this example, specifically:

[0066] (1) The compressed rare earth permanent magnet powder alloy billet is packaged in an air-isolated manner, and sent to the preparation box 37, the box door 90 is closed, and the air in the box is evacuated or filled with an inert gas; when the preparation box 37 and the glove box 39 Open the 6# isolation valve 38 between the boxes, transfer the packaged blanks to the glove box 39, close the 6# isolation valve 38 between the boxes; put the blanks into the material box 42 in the glove box 39, and the material box 42 yards are arranged stack; when the pressure balance of the glove box 39 and the sealed transfer box 41, open the 7# isolation valve 40 between the boxes, and transfer the stacked material boxes 42 to the sealed transfer box 41, and close the 7# isolation valve 40 ...

Embodiment 3

[0074] Embodiment 3: The difference between this example and Example 2 is: the limitation of parameters in the sintering process of this example, specifically:

[0075] In step (2), when the pressure in the charging chamber 44 and the preheating chamber 16 is balanced, open the 1# isolation valve 14 between the chambers, transfer the rack 2 to the preheating chamber 16, close the 1# isolation valve 14; start vacuuming, When the vacuum degree is higher than 1Pa, start heating to 500°C and keep it warm for 1 hour;

[0076] Step (3), the heating and degassing chamber 26 is in a vacuum state, the heating temperature is 500°C, open the 2# isolation valve 25 in the room, transfer the material rack 2 to the heating and degassing chamber 26, close the 2# isolation valve 25; The temperature is raised from 500°C to 850°C in multiple stages and kept warm for 4 hours, and the vacuum degree reaches 3E-2Pa.

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Abstract

The invention provides rare earth permanent magnetic alloy continuous sintering equipment. a preparation box, a glove box, a tunnel type transferring sealing box, a lock chamber, a material loading chamber, a preheating chamber, a heating degassing chamber, a sintering chamber and a cooling chamber are serially connected by valves among the boxes and valves among the chambers, compressed molded rare earth permanent magnetic alloy powder is transferred in an oxygen-free atmosphere, and is subjected to heating degassing treatment, sintering treatment and cooling treatment in different chambers. The preparation box, the glove box and the tunnel type transferring sealing box are transmitted on bottom rolls, transmission devices of other chambers are arranged on the upper part of each chamber, conveying is performed by idle wheels and tracks, the idle wheels of a material frame are suspended on the tracks of the transmission devices, and multiple material boxes can be loaded on the drawer-type material frame. An upright rectangular heating furnace has a heating area with narrow width and is uniform in heating, fast in cooling and efficient. Under the premise of greatly saving energy, oxygen-free transferring is realized, the product performances are improved by continuous sintering, and the consistency demand on the magnetism performance of the sintered rare earth permanent magnetic alloy body is ensured.

Description

technical field [0001] The invention relates to continuous sintering equipment for NdFeB rare earth permanent magnet alloy, and belongs to the technical field of permanent magnet alloy processing equipment and technology. Background technique [0002] with R 2 Fe 14 R-Fe-B NdFeB rare earth permanent magnets with B-type compounds as the main phase have been used more and more for their excellent magnetic properties, and are widely used in medical nuclear magnetic resonance imaging, computer hard drives, and mobile phones. Vibration motors, motors for hybrid vehicles, wind turbines, etc. [0003] The existing NdFeB rare earth permanent magnet alloy vacuum sintering furnace is a single-chamber furnace with heating and rapid cooling functions, and some sintering furnaces are also equipped with a protective atmosphere glove box. Because the internal heating furnace can only be heated in a vacuum state, the heating speed is slow, and the temperature uniformity of long-term use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10
Inventor 陈晓东孙宝玉
Owner SHENYANG CHINANORTH VACUUM TECH CO LTD
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