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Additive manufacturing method combining laser polishing and laser additive manufacturing

A laser additive and laser polishing technology, which is applied in the direction of additive manufacturing, additive processing, and improvement of process efficiency, can solve problems such as high requirements for equipment integration, difficult control, and complicated operation, so as to improve the organization and stress state, eliminate Oxide layer, effect of reducing residual stress

Pending Publication Date: 2022-05-27
江苏亚威创科源激光装备有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the introduction of material reduction equipment, this operation method has high requirements for equipment integration, high cost, and new pollutants will be brought by material reduction, making the operation complicated and difficult to control

Method used

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  • Additive manufacturing method combining laser polishing and laser additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Additive Manufacturing of Laser Polishing-Laser Additive Compounding

[0027] The first step is to install the laser polishing auxiliary device and the laser additive auxiliary device on the base plate to form an integrated working system with the laser;

[0028] The second step is to adjust the position of the laser additive auxiliary device, start the laser, and adjust the powder feeding rate of the powder feeder during the forming process. After the deposition starts, the temperature control device turns on the constant temperature water cooling mode or heating and heat preservation, and cools or heats the substrate. Cooling In mode, the preset temperature is set to 20℃;

[0029] The laser deposition equipment is fiber laser additive manufacturing equipment with a wavelength of 1064nm and a power of 1000W. The deposited material is alloy Ti6Al4V, the scanning speed is 10mm / s, and the powder feeding rate is 6.5g / min.

[0030] In the third step, every time a...

Embodiment 2

[0032] Example 2 Additive Manufacturing of Laser Polishing-Laser Additive Compounding

[0033] The first step is to install the laser polishing auxiliary device and the laser additive auxiliary device on the base plate to form an integrated working system with the laser;

[0034] The second step is to adjust the position of the laser additive auxiliary device, start the laser, and adjust the powder feeding rate of the powder feeder during the forming process. After the deposition starts, the temperature control device is turned on to heat the substrate. In the heating mode, the preset temperature is set to 100℃;

[0035] The laser deposition equipment is semiconductor laser additive manufacturing equipment, the wavelength is 980nm, the power is 2500W, the deposited material is high temperature alloy Stellite6, the scanning speed is 20mm / s, and the powder feeding rate is 10.5g / min;

[0036] In the third step, every time a layer of metal powder is deposited, the deposition is s...

Embodiment 3

[0038] Example 3 Additive Manufacturing of Laser Polishing-Laser Additive Compounding

[0039] The first step is to install the laser polishing auxiliary device and the laser additive auxiliary device on the base plate to form an integrated working system with the laser;

[0040] The second step is to adjust the position of the laser additive auxiliary device, start the laser, and adjust the powder feeding rate of the powder feeder during the forming process. After the deposition starts, the temperature control device is turned on to heat the substrate. In the heating mode, the preset temperature is set to 300℃;

[0041]The laser deposition equipment is the current semiconductor laser additive manufacturing equipment, the wavelength is 980nm, the power is 3500W, the deposited material is high-speed steel M2, the scanning speed is 15mm / s, and the powder feeding rate is 8.5g / min;

[0042] In the third step, every time a layer of metal powder is deposited, the deposition is stop...

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Abstract

The invention belongs to the technical field of laser additive manufacturing, and particularly relates to a laser polishing-laser additive composite additive manufacturing method which takes metal powder as a raw material, and in the process of deposition by adopting the laser additive manufacturing method, laser polishing is performed once after each metal sheet layer is deposited until deposition is completed. According to the method, the laser polishing technology is adopted for cleaning the surface deposited in additive manufacturing, an oxide layer formed on the surface can be eliminated, slow cooling of the surface layer can be achieved, residual stress is reduced, and the structure and the stress state are improved; and compared with other operation modes, the method has the advantage of being convenient and simple to operate.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, relates to powder feeding laser deposition additive manufacturing of metal materials, and in particular relates to a laser polishing-laser additive composite additive manufacturing method. Background technique [0002] Laser additive manufacturing of formed metal parts, especially direct laser deposition technology, has incomparable advantages in the preparation and remanufacturing of high-performance metal parts. The protective atmosphere during the deposition process is protected by argon introduced under atmospheric conditions. At this time, the high temperature environment causes the surface of the molten pool to inevitably form an oxide surface after solidification, which is very important for the final deposited additive manufacturing. Microstructure and mechanical properties have a certain impact. If the oxides formed on this surface can be removed during the additive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/50B22F10/28B33Y10/00
CPCB22F10/50B22F10/28B33Y10/00Y02P10/25
Inventor 陈长军陈明卢杭梅笠王雪峰蔡诚张敏
Owner 江苏亚威创科源激光装备有限公司
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