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Titanium alloy parts with uniform transverse and longitudinal properties and preparation method thereof

A titanium alloy, horizontal and vertical technology, applied in the field of titanium alloys, can solve problems such as low elongation, product damage, and inability to twist horizontal and vertical performance.

Active Publication Date: 2022-04-15
飞而康快速制造科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alloys manufactured by the current selective laser melting method often have obvious differences in horizontal and vertical properties. For example, titanium alloys such as TC4, TA15, TA17, TA1, and TC21 have high strength in samples perpendicular to the growth direction under the current process parameters. The elongation rate is low, and the average strength of the sample parallel to the growth direction is low and the elongation rate is high, which inevitably leads to the difference in the transverse and longitudinal properties of the product, and the difference in transverse and longitudinal properties cannot be reversed at all through subsequent annealing heat treatment
[0003] The isotropy of metal alloys is related to the establishment of the design allowable value. If the alloy has obvious anisotropy, it is likely that the product will be damaged due to the low performance value of some orientations when the alloy is used. Material failure phenomenon

Method used

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  • Titanium alloy parts with uniform transverse and longitudinal properties and preparation method thereof
  • Titanium alloy parts with uniform transverse and longitudinal properties and preparation method thereof
  • Titanium alloy parts with uniform transverse and longitudinal properties and preparation method thereof

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preparation example Construction

[0034] The technical scheme for preparing titanium alloy parts with uniform horizontal and vertical properties provided by the application is as follows:

[0035] By transforming at least a part of the martensite of the titanium alloy part into α phase and / or β phase during selective laser melting forming, to prepare the titanium alloy part; and

[0036] The titanium alloy parts are homogenized by heat treatment.

[0037] This application prepares titanium alloy parts by laser selective melting forming technology, and transforms at least a part of the martensite in the titanium alloy parts into α phase and / or β phase during the forming process, thereby improving the internal structure of the titanium alloy parts , and then reduce the difference in horizontal and vertical properties of titanium alloys.

[0038] Furthermore, the titanium alloy parts prepared by laser selective melting and forming, followed by heat treatment, further make the internal structure of the titanium a...

Embodiment 1

[0054] use figure 1 The shown process step prepares TC4 titanium alloy parts, specifically as follows:

[0055] TC4 titanium alloy powder was prepared by vacuum atomization technology, and the parameters of the prepared powder were as follows: D10 particle size was 19.32 μm, D50 particle size was 31.45 μm, D90 particle size was 48.76 μm; sphericity was 90%, bulk density was 2.15g / cm 3 , Tap density 2.58g / cm 3 , Hall flow rate 44s / 50g, hollow powder rate 0.1% and inclusion 0.05%.

[0056] Three-dimensional drawing software is used to draw the model of TC4 titanium alloy parts, three-dimensional digital model is converted into two-dimensional layer data by three-dimensional conversion two-dimensional data software, two-dimensional slice data is obtained, and it is imported into the system of laser selective melting and forming equipment .

[0057] Set the molding process parameters: laser power 282W, scanning speed 1150mm / s, powder layer thickness 40μm, spot diameter 0.12mm...

Embodiment 2

[0069] use figure 1 The process steps shown prepare TA15 titanium alloy parts, specifically as follows:

[0070] TA15 titanium alloy powder was prepared by vacuum atomization technology. The parameters of the prepared powder are as follows: D10 particle size is 21.33 μm, D50 particle size is 38.56 μm, D90 particle size is 52.98 μm; sphericity 95%, bulk density 2.41g / cm 3 , Tap density 2.79g / cm 3 , Hall flow rate 35s / 50g, hollow flour rate 0.05% and inclusions 0.1%.

[0071] Three-dimensional drawing software is used to draw the model of TA15 titanium alloy parts, three-dimensional digital model is converted into two-dimensional layer data by three-dimensional conversion two-dimensional data software, two-dimensional slice data is obtained, and it is imported into the system of laser selective melting and forming equipment .

[0072] Set the molding process parameters: laser power 330W, scanning speed 1200mm / s, powder layer thickness 30μm, spot diameter 0.13mm, laser overl...

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Abstract

The application provides a titanium alloy product with uniform transverse and longitudinal properties and a preparation method thereof. The method comprises: transforming at least a part of the martensite of the titanium alloy product into α phase and / or β phase in the laser selective melting forming process to prepare the titanium alloy product; and heat-treating the titanium alloy product Homogenization treatment to further improve horizontal and vertical consistency. The technical solution of the present application can obtain a titanium alloy product with uniform transverse and longitudinal properties, and the difference in strength and elongation between the transverse and longitudinal directions is within 5%, which is relatively consistent.

Description

technical field [0001] The application belongs to the technical field of titanium alloys, and in particular relates to a titanium alloy part with uniform transverse and longitudinal properties and a preparation method thereof, especially a special-shaped titanium alloy part with uniform transverse and longitudinal properties and a preparation method thereof. Background technique [0002] Alloy parts are widely used in various industries, among which special-shaped components are used more and more. Traditional mechanical processing is difficult to prepare a variety of special-shaped components. Laser selective melting molding technology (3D printing) just makes up for this defect, which can manufacture products of almost any shape. However, the alloys manufactured by the current selective laser melting method often have obvious differences in horizontal and vertical properties. For example, titanium alloys such as TC4, TA15, TA17, TA1, and TC21 have high strength in samples ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F3/24B33Y10/00B33Y80/00
CPCB22F3/24B33Y10/00B33Y80/00B22F2003/248B22F2998/10B22F10/00B22F10/36B22F10/28B22F10/64B22F10/37Y02P10/25
Inventor 计霞楚瑞坤段修涛陈志茹汪承杰高桦许停停秦贤邹荣堃
Owner 飞而康快速制造科技有限责任公司
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