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Silicon boride-enhanced laser additive manufacturing niti micro-nano powder core wire material and preparation method thereof

A technology of powder core wire material and laser additive material, which is applied in the field of materials for laser additive manufacturing and its preparation, silicon boride-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and its preparation, which can solve the problem of shape Loss of memory function and other problems, to achieve the effect of enhancing shape memory function, refining grains, and reducing burning loss

Active Publication Date: 2019-12-03
JIANGSU UNIV
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  • Summary
  • 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 process of NiTi alloy laser additive manufacturing, and to invent a silicon boride-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and its preparation method

Method used

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  • Silicon boride-enhanced laser additive manufacturing niti micro-nano powder core wire material and preparation method thereof
  • Silicon boride-enhanced laser additive manufacturing niti micro-nano powder core wire material and preparation method thereof

Examples

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Effect test

example 1

[0030] Taking the preparation of 1000g of silicon boride-enhanced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows:

[0031] Prepare 540g of nickel powder (particle size 50-75 microns) according to the required ratio, and then disperse 10g of silicon boride nano-powder (powder size 30-80 nanometers) in ethanol to prepare a nano-suspension, and put the two together Put into the ball mill and compound by ball milling to obtain 550g of micro-nano powder with micron nickel powder as the core and nano-silicon boride as the shell. Select 450g 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 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.

[0032] Under the same laser process conditions, NiTi alloy powder, NiTi solid wire, and NiTi mi...

example 2

[0036] Taking the preparation of 1000g of silicon boride-enhanced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows:

[0037] Prepare 560g of nickel powder (particle size 50-75 microns) according to the required ratio, and then disperse 20g of silicon boride nano-powder (powder diameter 30-80 nanometers) in ethanol to prepare a nano-suspension, put the two together Enter the ball mill into the ball mill and compound to obtain 580g of micro-nano powder with micron nickel powder as the core and nano-silicon boride as the shell. Select 420g 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 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.

[0038] Under the same laser process conditions, NiTi alloy powder, NiTi solid wire, and NiTi mi...

example 3

[0040] Taking the preparation of 1000g of silicon boride-enhanced NiTi micro-nano powder core wire for laser additive manufacturing as an example, the specific steps are as follows:

[0041]Prepare 550g of nickel powder (particle size 50-75 microns) according to the required ratio, and then disperse 15g of silicon boride nano-powder (powder size 30-80 nm) in ethanol to prepare a nano-suspension, put the two together Put into the ball mill and compound by ball milling to obtain 565g micro-nano powder with micron nickel powder as core and nano-silicon boride as shell. Select 435g 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 micro-nano powder into the U-shaped groove and then close the mouth, and pull it into a finished powder with a diameter of 2mm by a drawing device Core wire.

[0042] Under the same laser process conditions, NiTi alloy powder, NiTi solid wire, and NiTi micro-nano powder core wire a...

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Abstract

A silicon boride-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 nickel powder whose mass accounts for 54% to 56% of the entire powder core wire material. The micro-nano powder core composed of silicon boride nanopowder whose mass accounts for 1% to 2% of the entire powder core wire material and titanium skin whose mass accounts for 42% to 45% of the entire powder core wire material, the sum of each component is 100% , the preparation method mainly includes the preparation of micro-nano powder, 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 silicon boride-enhanced NiTi micro-nano powder core wire material for laser additive manufacturing and its Preparation. 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 its specific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/105B33Y70/00
CPCB22F1/0003B33Y70/00B22F10/00B22F10/20Y02P10/25
Inventor 王宏宇陈特樊曙天许增李乐
Owner JIANGSU UNIV
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