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Aviation titanium alloy 3D printing enhancement process

A 3D printing and titanium alloy technology, applied in the field of aerospace titanium alloy 3D printing enhancement technology, can solve the problems of easy printing defects, heat concentration, large residual stress, etc.

Pending Publication Date: 2021-03-09
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to solve the problems of concentrated heat, large residual stress and easy formation of printing defects in the existing 3D printing process, and propose a 3D printing enhancement process of titanium alloy for aviation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of aviation titanium alloy 3D printing enhancement process proposed by the present invention comprises the following steps:

[0022] S1. Flexible powder spreading: After the raw materials to be powdered are mixed by the mixer according to the required ratio, they are output through the output end of the mixer, and the mixed sample is spread on the powder bed through the scraper bar and the powder leakage groove to complete the flexible spreading. pink;

[0023] S2. Metal powder preheating: After the flexible powder spreading in step S1, the metal powder on the powder bed is scanned by laser for the first time, until the temperature of the metal powder laid on the powder bed rises to 120°C, the power is 60mW, and the scanning speed is 500mm / min, keep for 5min, then raise the temperature to 180°C to complete the preheating of the metal powder;

[0024] S3. Laser forming: plan the scanning path for the preheated metal powder layer in step S2 according to the set sc...

Embodiment 2

[0029] A kind of aviation titanium alloy 3D printing enhancement process proposed by the present invention comprises the following steps:

[0030] S1. Flexible powder spreading: After the raw materials to be powdered are mixed by the mixer according to the required ratio, they are output through the output end of the mixer, and the mixed sample is spread on the powder bed through the scraper bar and the powder leakage groove to complete the flexible spreading. pink;

[0031] S2. Metal powder preheating: after the flexible powder spreading in step S1, the metal powder on the powder bed is scanned by laser for the first time, until the temperature of the metal powder laid on the powder bed rises to 130°C, the power is 50mW, and the scanning speed is 550mm / min, keep for 4min, then raise the temperature to 200°C to complete the preheating of the metal powder;

[0032] S3. Laser forming: plan the scanning path for the preheated metal powder layer in step S2 according to the set sc...

Embodiment 3

[0037] A kind of aviation titanium alloy 3D printing enhancement process proposed by the present invention comprises the following steps:

[0038] S1. Flexible powder spreading: After the raw materials to be powdered are mixed by the mixer according to the required ratio, they are output through the output end of the mixer, and the mixed sample is spread on the powder bed through the scraper bar and the powder leakage groove to complete the flexible spreading. pink;

[0039] S2. Metal powder preheating: After the flexible powder spreading in step S1, the metal powder on the powder bed is scanned by laser for the first time, until the temperature of the metal powder laid on the powder bed rises to 140°C, the power is 30mW, and the scanning speed is 600mm / min, keep for 3min, then raise the temperature to 220°C to complete the preheating of the metal powder;

[0040] S3. Laser forming: plan the scanning path for the preheated metal powder layer in step S2 according to the set sc...

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Abstract

The invention discloses an aviation titanium alloy 3D printing enhancement process, which comprises the following steps: S1, outputting a to-be-laid powder raw material through a mixer, and flatly laying the to-be-laid powder raw material on a powder bed through a scraper strip and a powder leaking groove; S2, performing laser scanning on metal powder on the powder bed for the first time until thetemperature of the metal powder laid on the powder bed rises to a preset temperature; S3, planning a scanning path for a preheated metal powder layer according to a set scanning strategy, and performing laser scanning for the second time; S4, cooling and molding to obtain a solidified metal sheet; S5, performing laser scanning on the solidified metal sheet for the third time to obtain a semi-finished product; and S6, performing laser scanning on the surface of a metal cutting layer of a finished product for the fourth time, and then the aviation titanium alloy 3D printing enhancement processis completed. The process provided by the invention can reduce cracks and bubbles in the finished product, and the finished product is high in mechanical strength, dimensional precision and compactness and low in surface roughness Ra value.

Description

technical field [0001] The invention relates to the technical field of aviation parts processing technology, in particular to a 3D printing enhancement process of titanium alloy for aviation. Background technique [0002] Due to its excellent mechanical properties and low density, titanium alloy is widely used in air force models, but its extremely difficult processing performance greatly reduces the yield of parts and delays the production cycle. In addition, the air force has higher and higher requirements for the reliability of aircraft. In order to improve reliability, the parts of the key components of the aircraft are greatly integrated, and the parts are gradually integrated, so the size is getting larger and the shape is more and more complicated. In addition, as some advanced technologies such as topology optimization and lightweight design are widely used in aviation product design, many highly complex parts are formed. Conventional casting and forging welding can...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F10/38B22F3/105B33Y10/00
CPCB22F3/105B33Y10/00Y02P10/25
Inventor 刘桐李建生鹿宪珂桂凯旋王刚
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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