Niti micro-nano powder core wire for rare earth-enhanced laser additive manufacturing and preparation method thereof

A powder core wire and laser additive technology are applied in the fields of laser additive manufacturing materials and their preparation, rare earth-enhanced NiTi micro-nano powder core wires and their preparation fields, and can solve the shape memory function. Loss and other problems, to achieve the effect of enhancing shape memory function, inhibiting function loss, and reducing burning loss

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 invent a rare earth-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and its preparation method to solve the problem of relatively serious loss of shape memory function in the process of laser additive manufacturing of NiTi alloys.

Method used

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  • Niti micro-nano powder core wire for rare earth-enhanced laser additive manufacturing and preparation method thereof
  • Niti micro-nano powder core wire for rare earth-enhanced laser additive manufacturing and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0031] Taking the preparation of 1000g rare earth reinforced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows figure 2 As shown, first prepare 540g of nickel powder with a particle size of 65 microns according to the required ratio, and then disperse 5g of nano-cerium oxide powder (with a particle size of 30nm) in an alcohol-water mixed solution with a volume ratio of 1:1 to prepare nano Suspension, the two are put into a ball mill together and ball milled to obtain 545g rare earth reinforced micro-nano powder (such as figure 1 ). Select 455g of pure titanium strip with a width of 10mm and a thickness of 0.3mm, first roll it into a U shape, add the aforementioned rare earth reinforced micro-nano powder into the U-shaped groove and then close it, and pull it into a diameter of 1.5mm by a drawing device The finished powder core wire material.

[0032] Under the same laser process conditions, NiTi alloy powder, ...

example 2

[0035] Taking the preparation of 1000g rare earth reinforced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows figure 2 As shown, according to the required ratio, first prepare 560g of nickel powder with a particle size of 50 microns, and then disperse 15g of nano-cerium oxide powder (with a particle size of 80nm) in an alcohol-water mixed solution with a volume ratio of 1:1 to prepare nano Suspension, put the two into a ball mill together and ball mill to obtain 575g rare earth reinforced micro-nano powder (such as figure 1 ). Select 425g of pure titanium strip with a width of 10mm and a thickness of 0.3mm, first roll it into a U shape, add the aforementioned rare earth reinforced micro-nano powder into the U-shaped groove and then close it, and pull it into a diameter of 0.5mm by a drawing device The finished powder core wire material.

[0036] Under the same laser process conditions, NiTi alloy powder, NiTi...

example 3

[0038] Taking the preparation of 1000g rare earth reinforced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows figure 2 As shown, according to the required ratio, first prepare 550g of nickel powder with a particle size of 75 microns, and then disperse 10g of nano-cerium oxide powder (with a particle size of 50nm) in an alcohol-water mixed solution with a volume ratio of 1:1 to prepare nano Suspension, the two are put into a ball mill together and ball milled to obtain 560g rare earth reinforced micro-nano powder (such asfigure 1 ). Select 440g of pure titanium strip with a width of 10mm and a thickness of 0.3mm, first roll it into a U shape, add the aforementioned rare earth reinforced micro-nano powder into the U-shaped groove and then close it, and pull it into a 2mm diameter strip by a drawing device. Finished powder core wire.

[0039] Under the same laser process conditions, NiTi alloy powder, NiTi solid ...

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Abstract

A rare earth-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and a preparation method thereof, characterized in that the powder core wire material is composed of micron nickel powder and a mass accounting for 54% to 56% of the entire powder core wire material. The rare earth reinforced micro-nano powder core composed of 0.5%~1.5% rare earth nanopowder of the whole powder core wire material and the titanium skin whose mass accounts for 42.5%~45.5% of the whole powder core wire material are composed, and the sum of each component is 100%. The preparation method mainly includes micro-nano powder preparation, skin forming and powder filling, mouth closing and drawing into filaments. Using the NiTi micro-nano powder core wire material according to the present invention as a material for laser additive manufacturing has the characteristics of small loss of shape memory function and high forming accuracy, and avoids the low powder utilization rate of current powder as additive manufacturing materials. At the same time, it also solves the problem of using solid wire as an additive manufacturing material, which requires higher laser energy and is more likely to cause functional loss.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, in particular to a material for laser additive manufacturing and a preparation method thereof, specifically a rare earth-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and a preparation method thereof . 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] Nickel-titanium shape memory alloy (hereinafter referred to as NiTi alloy), because of it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B33Y70/00B22F3/105
CPCB22F1/0003B33Y70/00B22F10/00B22F10/34Y02P10/25
Inventor 王宏宇陈特刘桂玲许增李乐
Owner JIANGSU UNIV
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