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LaFeSi-based magnetic refrigeration sandwich panel, preparation method and processing device thereof

A processing device and magnetic refrigeration technology, applied in the direction of magnetic materials, chemical instruments and methods, inductance/transformer/magnet manufacturing, etc., can solve the problems of low strength, uneven structure of LaFeSi-based magnetic refrigeration plates, etc., to increase surface area and shorten The time required and the effect of improving cooling efficiency

Active Publication Date: 2020-11-10
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects and deficiencies in the above-mentioned technologies, the object of the present invention is to provide a LaFeSi-based magnetic refrigeration sandwich panel, a preparation method and a processing device thereof, through which the panel panel and the core panel are connected to each other by friction stir processing. Plastic deformation to solve the technical problems of uneven structure and low strength of LaFeSi-based magnetic refrigeration plates prepared in the prior art

Method used

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  • LaFeSi-based magnetic refrigeration sandwich panel, preparation method and processing device thereof
  • LaFeSi-based magnetic refrigeration sandwich panel, preparation method and processing device thereof

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preparation example Construction

[0034] The preparation method of the LaFeSi-based magnetic refrigeration sandwich plate proposed by the present invention includes the raw material selection and pretreatment of the LaFeSi-based magnetic refrigeration sandwich plate, the raw material selection and design of the processing device, and the setting of processing parameters, specifically including:

[0035] Raw material selection and pretreatment: LaFeSi-based magnetic refrigeration sandwich panels are cast LaFeSi magnetic refrigeration panels, with a width of 80mm, a length of 100mm, and a thickness of 3-5mm. The core plate is made of Q235 steel, with a width of 80mm, a length of 100mm, and a thickness of 3mm. Before processing, use sandpaper to grind the surface of the core board and panel board to make the surface roughness Ra≤10μm, and clean the polished core board and panel board surface with acetone to remove surface oil, oxides and impurities and dry them.

[0036] The parameter setting of the friction stir...

Embodiment 1

[0043] In this embodiment, the LaFeSi-based magnetic refrigeration plate is used as the panel plate, and the Q235 steel is used as the core plate to prepare the LaFeSi-based magnetic refrigeration sandwich plate. Specific steps are as follows:

[0044] Raw material selection and pretreatment: The face plate of the LaFeSi-based magnetic refrigeration sandwich panel is a cast LaFeSi magnetic refrigeration panel, with a width of 80mm, a length of 100mm, and a thickness of 5mm. The core plate is made of Q235 steel, with a width of 80mm, a length of 100mm, and a thickness of 3mm. Before processing, use sandpaper to polish the surface of the core board and panel board, so that the surface roughness of the board is Ra≤10μm, and clean the surface of the polished core board and panel board with acetone to remove surface oil, oxides and impurities and dry them .

[0045] Material selection and design of the processing device: the material of the stirring head is tungsten-rhenium alloy...

Embodiment 2

[0052] In this embodiment, the LaFeSi-based magnetic refrigeration plate is used as the panel plate, and the Q235 steel is used as the core plate to prepare the LaFeSi-based magnetic refrigeration sandwich plate. Specific steps are as follows:

[0053] Raw material selection and pretreatment: the same as in Example 1, except that the thickness of the LaFeSi-based magnetic refrigeration sandwich plate is 3mm.

[0054] Choice of stirring head: The stirring head is made of tungsten-rhenium alloy, including a shaft shoulder and a stirring needle. The diameter of the shoulder of the friction stir point processing is 10mm, the diameter of the cylindrical stirring needle is 4mm, and the length of the needle is 3.4mm.

[0055] The parameter setting of friction stir processing: the rotation speed is 475rpm, the forward speed is 30mm / min, the shoulder depression is 0.2mm, the stirring needle depression speed is 20mm / min, and the pass offset is 6mm.

[0056] Parameter settings for fric...

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Abstract

The invention discloses a LaFeSi-based magnetic refrigeration sandwich plate, a preparation method and a processing device thereof. The LaFeSi-based magnetic refrigeration sandwich plate takes Q235 steel as a core plate and a cast LaFeSi magnetic refrigeration plate as a panel, wherein the core plate is clamped between the upper panel and the lower panel, the LaFeSi-based magnetic refrigeration sandwich plate with blind holes is prepared through friction stir processing and friction stir point processing, and overflowing materials generated by friction stir point machining are accumulated around the blind hole. The method comprises the following steps: carrying out multi-pass stirring friction processing on a panel plate and a core plate interface of a LaFeSi-based magnetic refrigeration sandwich plate; carrying out stirring friction point machining on the surface of the panel, so that blind holes are formed in the surface of the panel; and accumulating overflowing materials generatedby stirring friction point machining on the surface of the panel around the blind hole. The LaFeSi-based magnetic refrigeration sandwich plate prepared by the method has the high strength of a Q235 core plate and also has the characteristic of high-efficiency refrigeration of a LaFeSi-based magnetic refrigeration plate, and all component elements of the LaFeSi-based magnetic refrigeration sandwichplate are uniformly distributed.

Description

technical field [0001] The invention belongs to the technical field of functional plate preparation, and in particular relates to a LaFeSi-based magnetic refrigeration sandwich plate, a preparation method and a processing device thereof. Background technique [0002] Traditional gas compression refrigeration is cooled by the action of freon refrigerant. This refrigeration method has problems such as low refrigeration efficiency, large environmental pollution and large noise pollution. In particular, the use of freon will seriously damage the ozone layer and produce a greenhouse effect. Therefore, it is imperative to develop a high-efficiency, pollution-free new refrigeration technology. As a new refrigeration method, magnetic refrigeration has been widely reported by researchers. This refrigeration method converts heat through solid refrigerant, and has the characteristics of high refrigeration efficiency, reversible process, stability and reliability. In addition, the sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/18B32B38/00B32B38/16H01F1/01H01F41/00
CPCB32B15/013B32B38/0012B32B38/162B32B38/164H01F1/015H01F41/00Y02B30/00
Inventor 王文刘强王快社韩鹏彭湃张婷乔柯张志娟强菲王智
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY