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Preparing method for La and Nd doping titanium alloy materials

A titanium alloy and system technology, applied in the field of titanium alloy materials, can solve the problems of dimensional deformation, reduce mechanical properties, dislocation, etc., and achieve the effect of improving performance and improving tensile strength

Inactive Publication Date: 2016-04-06
毛培
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Materials made by 3D printing are often due to different materials selected, inappropriate binders selected during molding, and poor control of process parameters, which will lead to blurred surface, warping deformation, dimensional deformation, and stair step of the green body. Shaped surface, microstructure defects, broken, mislayered and other defects, which are fatal hazards for 3D printing technology to be used in the manufacture of medical devices
Although its properties can be improved to some extent by subsequent heat treatment, due to the easy formation of coarse structures during heat treatment, the mechanical properties are reduced.
In addition, because the surface roughness of laser 3D printing titanium alloy products is poor, and the surface roughness requirements of many structural parts are very strict, the problem of product roughness is still to be further solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The raw material comprising the following elements is used as the titanium alloy powder raw material in the powder preparation step: Al: 3.80%, Cu: 0.15%, Zr: 0.85%, Hf: 0.40%, V: 1.50%, Sn: 0.35%, Nd: 0.45%, Nb: 0.50%, La: 1.60%, the balance is Ti, and the above percentages are mass percentages. First ball mill the titanium alloy powder raw material until the particle size is below 200 mesh, and then sinter it at a temperature of 1150°C and a holding time of 3 hours to obtain a titanium alloy sintered block, then ball mill the sintered block again at 200r / min Under the rotating speed, the ball milled for 10 hours, and finally the alloy powder with a particle size of 15 μm was screened out, which was used as the raw material for laser 3D printing. The blank was prepared by 3D printing technology, using orthogonal scanning, the laser processing parameters were: laser power 200W, scanning speed 1250mm / s, the blank formed by laser printing was ultrasonically cleaned for 10...

Embodiment 2

[0018] The raw material comprising the following elements is used as the titanium alloy powder raw material in the powder preparation step: Al: 4.20%, Cu: 0.05%, Zr: 0.95%, Hf: 0.20%, V: 1.20%, Sn: 0.15%, Nd: 0.55%, Nb: 0.60%, La: 1.80%, the balance is Ti, and the above percentages are mass percentages. First, ball mill the titanium alloy powder raw material until the particle size is below 200 mesh, and then sinter it. The sintering temperature is 1200° C., and the holding time is 3.5 hours to obtain a titanium alloy sintered block. The sintered block is ball milled again, at 250 r / Min speed, ball milling for 12 hours, and finally the alloy powder with a particle size of 25 μm was screened out, which was used as the raw material for laser 3D printing. The blank is prepared by 3D printing technology, using orthogonal scanning, the laser processing parameters are: laser power 250W, scanning speed 1350mm / s, the blank formed by laser printing is ultrasonically cleaned for 15mins...

Embodiment 3

[0020] The raw material comprising the following elements is used as the titanium alloy powder raw material in the powder preparation step: Al: 3.50%, Cu: 0.10%, Zr: 0.85%, Hf: 0.40%, V: 1.50%, Sn: 0.45%, Nd: 0.50%, Nb: 0.40%, La: 1.50%, the balance is Ti, and the above percentages are mass percentages. First, ball mill the titanium alloy powder raw material until the particle size is below 200 mesh, and then sinter it. The sintering temperature is 1180°C, and the holding time is 3 hours to obtain a titanium alloy sintered block. The sintered block is ball milled again at 230r / min Under the rotating speed, the ball milled for 11 hours, and finally the alloy powder with a particle size of 20 μm was screened out, which was used as the raw material for laser 3D printing. The blank is prepared by 3D printing technology, using orthogonal scanning, the laser processing parameters are: laser power 250W, scanning speed 1300mm / s, the blank formed by laser printing is ultrasonically cle...

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Abstract

The invention provides a preparing method for La and Nd doping titanium alloy materials. The preparing method comprises the steps of powder preparing, laser 3D printing, vacuum annealing and electrochemical polishing. By means of selection of elementary components of titanium alloy powder raw materials, the tensile strength, the ductility and the reduction of area of titanium alloy are obviously improved. 3D printing raw materials even in component and good in granularity are obtained in the manner of ball milling, sintering and re-ball-grinding. The 3D printing technology and vacuum annealing are combined, and the performance of printed titanium alloy is improved. The problem that 3D printing finished products are high in roughness is solved through electrochemical polishing.

Description

technical field [0001] The invention relates to the field of titanium alloy materials, in particular to a preparation method of La and Nd doped titanium alloy materials. Background technique [0002] Titanium alloy has many outstanding advantages such as light weight, high strength, corrosion resistance, non-magnetic, etc., and has a wide range of applications in aviation, aerospace, navigation, automobile, chemical industry, biomedicine and other fields. However, compared with other commonly used metals, titanium alloys also have the disadvantages of high price and difficult processing. Especially for components with complex shapes, it is not only difficult to process them by material removal machining, but also has serious waste of raw materials. The casting method not only has low yield but also has many casting defects and low performance. The forging method can only be used to prepare components with simple shapes and small deformations. [0003] 3D printing technolog...

Claims

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Application Information

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IPC IPC(8): C22C14/00B22F1/00B22F9/04B22F3/105B22F3/24B33Y70/00
CPCB22F1/0003C22C14/00B22F3/24B22F9/04B22F10/00B22F10/62B22F10/64B22F10/36B22F10/366B22F10/20B22F10/68Y02P10/25
Inventor 毛培
Owner 毛培
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