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A powder metallurgy method for forming functionally graded materials based on selective laser melting

A functionally graded material, powder metallurgy technology, applied in the direction of additive processing, energy efficiency improvement, process efficiency improvement, etc., can solve the problems of high forming cost, high cost, long cycle, etc., to reduce processing cycle and reduce production cost. , the effect of reducing the processing process

Active Publication Date: 2018-12-11
山西阳宸中北科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is easy to operate, flexible in control, suitable for industrial production, and can prepare large-scale materials. The disadvantage is that when preparing complex structural parts, additional customized molds are required, the cycle is longer, and the cost is higher.
Forming accuracy is difficult to grasp, and secondary processing is often required
To sum up, FGM has broad application prospects, but it is difficult to grasp the thickness of each gradient layer in the preparation of FGM materials, the forming cost of FGM complex parts is high, the cycle is long, and the forming accuracy still needs to be further improved

Method used

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  • A powder metallurgy method for forming functionally graded materials based on selective laser melting

Examples

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Embodiment 1

[0022] Preparation of a small engine nozzle made of tungsten-copper functionally graded material.

[0023] a. According to the use characteristics of the small engine nozzle, the material of the formed part is tungsten-copper functionally graded material, the outer diameter is 100mm, the inner diameter is 80mm, and the height is 100mm. Among them, the copper content change gradient is 15%, 20%, 25%, 30%, and the gradient layer thickness is 25mm, which are respectively called the first gradient layer, the second gradient layer, the third gradient layer, and the fourth gradient layer.

[0024] b. Loading, put tungsten-copper alloy powder with copper content of 15%, 20%, 25%, and 30% into different feeding cylinders respectively. The structure of the feeding cylinder is: bolt 3 fixes feeding cylinder 1 on the beam 2, a roller 4 with a wheel groove is installed at the bottom of the feeding cylinder, the roller is controlled by a motor 5, and the motor 5 is connected to the control...

Embodiment example 2

[0031] Preparation of an aluminum-based SiC functionally graded material heat-resistant plate.

[0032] a. The heat-resistant plate material is an aluminum-based SiC functionally graded material with a size of 100×80×15mm (length, width and height). The aluminum substrate is ZL101, and the SiC content changes in the height direction are: 0.6%, 0.8%, 1.0%, 0.8%, 0.6%, and the thickness of the gradient layer is 3mm, respectively called the first gradient layer, the second gradient layer, and the second gradient layer. The third gradient layer, the fourth gradient layer, and the fifth gradient layer.

[0033] b. Loading, change the content of SiC to: 0.6%, 0.8%, 1.0%, 0.8%, 0.6% respectively figure 1 There are 5 feeding cylinders in the structure, the structure of the feeding cylinder is as follows: the bolt 3 fixes the feeding cylinder 1 on the beam 2, the bottom of the feeding cylinder is equipped with a roller 4 with a wheel groove, the roller is controlled by the motor 5, an...

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Abstract

The present invention proposes a powder metallurgy forming method for functionally graded materials based on selective laser melting. The forming method combines SLM technology and powder sintering technology. Firstly, SLM forming is performed, and materials with different components are laid on different sections of the part and melted by laser. Form the outline of the part and the internal structure of the part. After the outline of the entire part is formed, the part is sintered at high temperature to sinter the unmelted powder inside the outline of the part. The method can precisely control the thickness of the functionally graded material, prepare high-quality FGM materials, and can also quickly and accurately manufacture parts with arbitrary complex shapes, greatly reducing the processing steps, reducing the processing cycle, and reducing production costs.

Description

technical field [0001] The invention discloses a powder metallurgy molding method for functionally graded materials based on selective laser melting, which belongs to the technical field of 3D printing additive manufacturing. Background technique [0002] Functionally graded material (FGM) is a new type of heterogeneous composite material that uses advanced material composite technology to make the composition and structure of the material change in a gradient along the thickness direction. From the perspective of material combination, functionally graded materials can be divided into metal / ceramic, ceramic / ceramic, ceramic / plastic and other combinations, so as to obtain a variety of materials with special functions, which can solve the thermal problem of materials in high-speed aerospace vehicles. The problem of stress relaxation has broad application prospects. [0003] The preparation methods of FGM mainly include plasma spraying, vapor deposition, powder metallurgy, sel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F3/10B22F3/02B22F3/24B33Y10/00B33Y30/00
CPCB22F3/003B22F3/02B22F3/10B22F3/24B33Y10/00B33Y30/00B22F2998/10B22F2003/248B22F10/00B22F10/36B22F10/34B22F12/55B22F10/80B22F10/28B22F10/64Y02P10/25
Inventor 赵占勇白培康李宝强李玉新刘斌王建宏
Owner 山西阳宸中北科技有限公司
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