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Laser additive manufacturing process for TC4 titanium alloy

An additive manufacturing and titanium alloy technology, applied in the field of additive manufacturing, can solve the problems of poor plasticity of titanium alloys, difficult to achieve precision thin-walled parts with variable cross-section, etc., and achieve the effect of enhancing strength

Inactive Publication Date: 2018-07-13
佛山市领卓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plasticity of titanium alloy is poor, and it is difficult for traditional processing technology to realize the manufacture of complex components such as variable cross-section, internal complex flow channels, and precision thin-walled parts, which are easily realized by additive manufacturing technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Powder the TC4 titanium alloy raw material powder to form a powder layer, and the thickness of the powder coating is 50 μm;

[0019] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; where the laser power is 800W, the spot diameter during the laser scanning process is preferably 50 μm, and the laser scanning speed is preferably 10000 mm / s. The scanning spacing of scanning is preferably 0.17mm;

[0020] (3) Cooling with argon gas at minus 30 degrees Celsius;

[0021] (4) Stress relief annealing treatment: heating to 140°C and then air cooling;

[0022] (5) Repeat steps (1)-(4) 10 times to obtain TC4 titanium alloy samples.

[0023] The tensile test was carried out on the prepared TC4 titanium alloy, the tensile strength was 1389Mpa, and the elongation was 11%.

Embodiment 2

[0025] (1) Powder the TC4 titanium alloy raw material powder to form a powder layer, and the thickness of the powder coating is preferably 30 μm;

[0026] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; where the laser power is 1000W, the spot diameter during the laser scanning process is preferably 100μm, and the laser scanning speed is preferably 9000mm / s. The scanning interval of scanning is preferably 0.1mm;

[0027] (3) It is cooled by argon gas at minus 50 degrees Celsius;

[0028] (4) Stress relief annealing treatment: heating to 220°C and then air cooling;

[0029] (5) Repeat steps (1)-(4) 10 times to obtain TC4 titanium alloy samples.

[0030] The tensile test was carried out on the prepared TC4 titanium alloy, the tensile strength was 1452Mpa, and the elongation was 10%.

Embodiment 3

[0032] (1) Powder the TC4 titanium alloy raw material powder to form a powder layer, and the thickness of the powder coating is 39 μm;

[0033] (2) Under the protection of argon, laser scan the powder layer for additive manufacturing; where the laser power is 850W, the spot diameter during the laser scanning process is preferably 70μm, and the laser scanning speed is preferably 8000mm / s. The scanning spacing of scanning is preferably 0.2mm;

[0034] (3) It is cooled by argon gas at minus 40 degrees Celsius;

[0035] (4) Stress relief annealing treatment: heating to 170°C and then air cooling;

[0036] (5) Repeat steps (1)-(4) 10 times to obtain TC4 titanium alloy samples.

[0037] The tensile test was carried out on the prepared TC4 titanium alloy, the tensile strength was 1411Mpa, and the elongation was 12%.

[0038] Comparison: the tensile strength of the TC4 titanium alloy obtained by conventional forging and annealing is 920Mpa, and the elongation is 12%. It can be seen...

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Abstract

The invention discloses a laser additive manufacturing process for TC4 titanium alloy, and the laser additive manufacturing process greatly enhances the strength of TC4 titanium alloy without reducingthe plasticity. According to the laser additive manufacturing process disclosed by the invention, TC4 titanium alloy powder is molten and solidified by adopting laser, and afterwards low-temperatureinert gas treatment is immediately implemented in order to generate lots of defects.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing process of TC4 titanium alloy. Background technique [0002] TC4 titanium alloy has excellent properties such as high specific strength and corrosion resistance, and is a lightweight structural material commonly used in the aerospace field. However, the plasticity of titanium alloy is poor, and it is difficult for traditional processing technology to realize the manufacture of complex components such as variable cross-section, internal complex flow channels, and precision thin-walled parts, but these are easy to achieve for additive manufacturing technology. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to provide a laser additive manufacturing process for high-strength TC4 titanium alloy. The process provided by the present invention can obtain TC4 titanium alloy with excellent qual...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/28B22F10/36B22F10/366B22F10/50B22F10/32Y02P10/25
Inventor 宋宇其他发明人请求不公开姓名
Owner 佛山市领卓科技有限公司
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