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A Laser Forming Method of Gradient Composite Structure

A laser forming and composite structure technology, applied in the direction of process efficiency improvement, additive manufacturing, additive processing, etc., can solve the problems of interface cracking between transition layers, large interlayer stress of transition layers, low strength of transition layers, etc. Small stress, continuous transition of components, and the effect of improving bonding strength

Active Publication Date: 2019-11-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned mainstream laser forming methods for gradient composite structures all adopt the control of powder feeding amount of different components to achieve the purpose of manufacturing gradient composite structures. This method is very effective for component control, but there are certain problems, mainly in The scanning trajectory is carried out line by line and layer by layer according to the outline. This scanning method cannot effectively solve the problem of large interlayer stress in the transition layer, which leads to problems such as interface cracking between transition layers or too low strength of the transition layer in the actual manufacturing process.

Method used

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  • A Laser Forming Method of Gradient Composite Structure
  • A Laser Forming Method of Gradient Composite Structure
  • A Laser Forming Method of Gradient Composite Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare TA15 alloy and Ti2AlNb alloy gradient composite structural parts (size 50*50*60) using laser three-dimensional forming technology. The equipment used is laser three-dimensional forming equipment, which includes 4KW carbon dioxide fast axial flow laser, powder feeding system, purification system, and numerical control When the system uses laser three-dimensional forming technology to manufacture parts, the titanium alloy powder used is produced by plasma rotating electrode atomization method, with a particle size of about 90-400μm.

[0039] The steps are shown in 5:

[0040] 1. Initialize the laser forming equipment

[0041] Turn on the laser for preheating, perform the inspection and preparation of each system of the laser forming equipment as required, and load TA15 alloy and Ti2AlNb alloy powder into powder feeding tanks 1 and 2 respectively.

[0042] 2. Scanning trace design of TA15 alloy and Ti2AlNb alloy transition layer

[0043] After the cladding of the entire TA1...

Embodiment 2

[0053] This example uses laser three-dimensional forming technology to prepare and manufacture TA15, Ti2AlNb titanium alloy gradient composite structure samples with a size of Φ130mm×200mm. The equipment used is laser three-dimensional forming equipment, which includes 4KW carbon dioxide fast axial flow laser, powder feeding system, purification System, numerical control system, when using laser three-dimensional forming technology to manufacture parts, the titanium alloy powder used is produced by plasma rotating electrode atomization method, and the particle size is about 90-400μm.

[0054] Proceed as follows:

[0055] 1. Initialize the laser forming equipment

[0056] Turn on the laser for preheating, perform the inspection and preparation of each system of the laser forming equipment as required, and load TA15 alloy and Ti2AlNb alloy powder into powder feeding tanks 1 and 2 respectively.

[0057] 2. Scanning trace design of TA15 alloy and Ti2AlNb alloy transition layer

[0058] Aft...

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Abstract

The invention proposes a laser forming method of a gradient composite structure, and the gradient composite structure is obtained through the steps of laser forming equipment preparation, laser forming process design, laser forming and the like. The present invention designs the scanning tracks of the transition layers so that the scanning tracks between adjacent two layers are nested with each other, thereby reducing and offsetting the interlayer stress between the transition layers, and at the same time making the combination of the transition layers The planar bonding is converted into three-dimensional bonding, which improves the bonding strength of the transition layer, and finally obtains a gradient composite structure with continuous transition of components, less interfacial stress, and higher overall strength.

Description

Technical field [0001] The invention relates to a laser forming method of a gradient composite structure, belonging to the technical field of metal special forming processing. Background technique [0002] The metal gradient composite structure has dual characteristics and has been widely used in actual production. Laser forming technology uses high-power lasers to melt the alloy powders that are simultaneously transported, and stack them layer by layer on the substrate to prepare near-net-shaped parts. It is a low-cost and rapid preparation technology for preparing high-performance, fully dense metal parts. The feature of point-by-point addition of material forming, this technology has great flexibility in material composition, solidification structure, and external dimensions, and is suitable for the forming and preparation of gradient composite structures. However, in the forming process of gradient materials, due to the large differences in the material structure and the mis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F2999/00B22F10/00B22F10/25B22F10/366B22F2207/01Y02P10/25
Inventor 吴海峰高源源邱美玲
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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