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Method for preparing cucrzr/316l connectors based on laser additive manufacturing technology

A manufacturing technology and laser additive technology, applied in the field of metal materials, can solve the problems of cumbersome steps, dangerous explosion welding operation, inability to apply to large-scale industrial production, etc., and achieve the effect of improving the interface strength

Active Publication Date: 2021-11-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many deficiencies in this invention, such as cumbersome steps involved, many process variables make it difficult to control the final quality of samples, it cannot be applied to mass industrial production and there is a certain operational risk in explosive welding
Therefore, there are limitations in the preparation of connectors by traditional preparation methods, and it is necessary to develop new preparation methods to manufacture CuCrZr / 316L connectors

Method used

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  • Method for preparing cucrzr/316l connectors based on laser additive manufacturing technology
  • Method for preparing cucrzr/316l connectors based on laser additive manufacturing technology
  • Method for preparing cucrzr/316l connectors based on laser additive manufacturing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The CuCrZr material was prepared by selective laser melting (SLM) at a bulk energy density of 400 J / mm 3 , the printing strategy is flat, and the printed size is 12*12*12mm 3 (Length, width and height), after the bottom material CuCrZr alloy is prepared, laser remelting is performed on its surface, and the energy density of the remelted laser body is 200J / mm 3 , the laser remelting strategy is planar, remelting twice. Printing of 316L alloy on CuCrZr remelted surface with a bulk energy density of 70 J / mm 3 , the printing strategy is plane, and its size is 10*10*10mm 3 (LWH). The printed CuCrZr / 316L connector sample was observed by scanning electron microscopy (SEM) at the interface between the 316L material and the CuCrZr material, such as figure 1 As shown in (a), the interface has no obvious defects, and the flatness of the interface meets the requirement of less than 0.5mm. The printed CuCrZr / 316L connector sample was observed by electron backscatter diffraction...

Embodiment 2

[0038] The CuCrZr material was prepared by selective laser melting (SLM) at a bulk energy density of 600 J / mm 3 , the printing strategy is chessboard, and the printed size is 12*12*12mm 3 (LWH). After the bottom material CuCrZr alloy is prepared, laser remelting is carried out on its surface, and the energy density of the remelted laser volume is 1000 J / mm 3 , the laser remelting strategy is planar, remelting 10 times. Print 316L alloy on CuCrZr remelted surface, the volume energy density used is 100J / mm 3 , the printing strategy is chessboard, its size is 12*12*12mm 3 (LWH). The printed CuCrZr / 316L connector sample was observed by scanning electron microscopy (SEM) at the interface between the 316L material and the CuCrZr material, such as figure 2 As shown in (a), there are no obvious holes in the 316L material, CuCrZr material and the interface between the two, and the interface flatness meets the requirement of less than 0.5mm. A new multi-element alloy mixed region...

Embodiment 3

[0041] The CuCrZr material was prepared by selective laser melting (SLM) with a bulk energy density of 1000J / mm 3 , the printing strategy is stripes, and the printed size is 16*16*16mm 3 (Length, width and height), after the bottom material CuCrZr alloy is prepared, laser remelting is performed on its surface, and the energy density of the remelted laser body is 800 J / mm 3 , the laser remelting strategy is planar, remelting 6 times. Printing of 316L alloy on the surface of laser remelted CuCrZr using a bulk energy density of 150 J / mm 3 , the printing strategy is chessboard, its size is 16*16*16mm 3 (LWH). The printed CuCrZr / 316L connector sample was observed by scanning electron microscopy (SEM) at the interface between the 316L material and the CuCrZr material, such as image 3 As shown in (a), 316L material and CuCrZr material and the interface between them have no obvious defects, such as holes, cracks, etc. It can be seen that the flatness of the interface between the ...

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Abstract

The present invention provides a method for preparing CuCrZr / 316L connectors based on laser additive manufacturing technology, step S1, using laser additive manufacturing technology to prepare an alloy in 316L alloy and CuCrZr alloy; step S2, for the step S1 The surface of the prepared alloy is remelted by laser; step S3, using laser additive manufacturing technology to prepare another alloy in 316L alloy and CuCrZr alloy on the surface of the alloy treated in step S2, so as to form a CuCrZr / 316L connector. The interface of the CuCrZr / 316L connector prepared by the present invention forms a new multi-element alloy mixed area, and a large number of nano-grains are formed inside the area, and the formed nano-grain interface has higher mechanical properties than the base material (CuCrZr and 316L) and strength to ensure the high quality of the CuCrZr / 316L interface.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a method for preparing CuCrZr / 316L connectors based on laser additive manufacturing technology. Background technique [0002] In recent years, laser additive manufacturing, a technology that facilitates custom production and freedom of design by fabricating complex parts directly from digital files, is now rapidly changing the manufacturing ecosystem. Laser additive manufacturing uses a high-energy laser beam to repeatedly scan each layer of powder particles, directly fuses the particles into a three-dimensional component, and solidifies them by partial or complete melting. Another important property of laser additive manufacturing is the ultrafast cooling rate (103-108 K / s). Unlike other rapid cooling techniques such as quenching, AM can produce three-dimensionally shaped metals (bulk parts) at extremely high cooling rates. Therefore, the technology has attracted consi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B22F10/64B33Y10/00B33Y40/20
CPCB22F10/28B22F10/64B33Y10/00B33Y40/20Y02P10/25
Inventor 马宗青胡章平刘永长
Owner TIANJIN UNIV
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