Functional low-loss shape memory alloy micro-nano powder core wire for laser additive manufacturing

A technology of memory alloy and powder core wire, which is applied in the direction of additive manufacturing, additive processing, and energy efficiency improvement. damage effect

Active Publication Date: 2019-12-03
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of relatively serious loss of shape memory function in the laser additive manufacturing process of shape memory alloys, and to invent a low-loss shape memory alloy micro-nano powder core wire material for laser additive manufacturing.

Method used

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  • Functional low-loss shape memory alloy micro-nano powder core wire for laser additive manufacturing
  • Functional low-loss shape memory alloy micro-nano powder core wire for laser additive manufacturing
  • Functional low-loss shape memory alloy micro-nano powder core wire for laser additive manufacturing

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Effect test

Embodiment 1

[0029] A functional low-loss shape memory alloy micro-nano powder core wire material for laser additive manufacturing. The skin of the powder core wire material is a pure metal with the highest boiling point among the elements that constitute the shape memory alloy, and the mass ratio of the entire powder core wire is 40%-70% of the material weight, the powder core of the powder core wire is a mixture of elemental metal micropowders of other elements except the element with the highest boiling point that constitute the shape memory alloy, or an alloy micropowder of other elements with reinforcement Micro-nano powder composed of nano-powder, wherein the nano-powder in the micro-nano powder accounts for 0.5%-4% of the mass of the whole powder core wire, and the rest are micron powder. The shape memory alloy is one of Cu-based, Fe-based shape-memory alloys and Ni-Ti-based shape-memory alloys (iron skin, copper skin, titanium skin). The micro-nano powder is preferably a core-shell...

Embodiment 2

[0031] like image 3 shown.

[0032] In this example, the preparation of 1000g of CuZnAl-based powder core wire material is taken as an example, 290g of zinc-aluminum alloy powder is prepared by mechanical alloying according to the required ratio, and then 30g of silicon boride nano-powder is dispersed in ethanol to prepare a nano-suspension. The two are put into a ball mill together to obtain 320g micro-nano powder by ball milling and compounding. Select 680g of pure copper strip with a width of 10mm and a thickness of 0.5mm, first roll it into a U shape, add the aforementioned micro-nano powder into the U-shaped groove and then close it, and pull it into a finished product with a diameter of 1.5mm by a drawing device Powder core wire. Under the same laser process conditions, CuZnAl alloy powder, CuZnAl solid wire, and CuZnAl powder core wire of the present invention were respectively used to prepare 4mm×4mm×12mm rods. Under the same cooling-deformation-heating cycle test c...

example 3

[0036]Taking the preparation of 1000g of silicon boride-enhanced CuZnAl micro-nano powder core wire for laser additive manufacturing as an example, first prepare 280g of zinc-aluminum alloy powder with a particle size of 50-75μm (including aluminum powder 33.6, 246.4 grams of zinc powder), and then disperse 20 g of silicon boride nano powder with a particle size of 30-80 nm in ethanol to prepare a nano-suspension, and then put micron-sized zinc-aluminum alloy powder and silicon boride nano powder together Into the ball mill, ball mill compound to obtain 300g such as figure 1 Micro-nanopowder with core-shell structure shown. Select 700g of pure copper strip with a width of 10mm and a thickness of 0.5mm, first roll it into a U shape, add the aforementioned micro-nano powder into the U-shaped groove and then close it, and pull it into a finished product with a diameter of 0.5mm by a drawing device Powder core wire.

[0037] Under the same laser process conditions, CuZnAl alloy ...

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Abstract

A functional low-loss shape memory alloy micro-nano powder core wire material for laser additive manufacturing and its preparation method, characterized in that the skin of the powder core wire material is a pure metal with the highest boiling point among the elements constituting the shape memory alloy, The powder core of the powder core wire is a mixture of elemental metal micropowders of other elements except the element with the highest boiling point that constitute the shape memory alloy, or a micronano powder composed of alloy micropowders of other elements and nanopowders that play a reinforcing role. , wherein the nano-powder in the micro-nano powder accounts for 0.5%-4% of the mass of the whole powder core wire material, and its preparation method mainly includes micro-nano powder preparation, skin forming and powder filling, jointing and drawing into wire. The use of the shape memory alloy powder core wire material of the present invention as a material for laser additive manufacturing has the characteristics of small loss of shape memory function and high forming precision.

Description

technical field [0001] The invention relates to a laser additive manufacturing technology, in particular to a material for laser additive manufacturing, in particular to a functional low-loss shape memory alloy micro-nano powder core wire material for laser additive manufacturing. Background technique [0002] Laser additive manufacturing technology refers to an advanced manufacturing technology that uses laser as an energy source and is based on the discrete-accumulation principle and driven by the three-dimensional data of the part to directly manufacture parts. However, the research and development of materials for laser additive manufacturing is still in its infancy, and there are relatively few types of materials that can be used, which greatly limits the wide application of this advanced manufacturing technology. [0003] Shape Memory Alloys, referred to as SMA, is an alloy material that can eliminate its deformation at a lower temperature after heating and restore its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B33Y70/00B22F3/105
CPCB22F1/00B33Y70/00B21C1/00B22F10/28B22F10/00Y02P10/25B21C1/003B21C37/045B21C37/042B22F10/25B22F5/12B22F1/052
Inventor 王宏宇许增袁晓明朱长顺刘晨曦胥保文吴勃任云鹏樊曙天刘桂玲吴雪莲陈婷卓
Owner JIANGSU UNIV
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