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A method of 3D printing metal materials with controllable temperature gradient in the solidification process

A metal material and temperature gradient technology, applied in the field of temperature, can solve problems such as thermal stress, and achieve the effect of low cost, reasonable price and easy access

Active Publication Date: 2019-03-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the thermal stress problem caused by the drastic change of temperature gradient in the metal 3D printing process, the present invention provides an efficient and simple method to control the temperature gradient in the processing process

Method used

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  • A method of 3D printing metal materials with controllable temperature gradient in the solidification process
  • A method of 3D printing metal materials with controllable temperature gradient in the solidification process
  • A method of 3D printing metal materials with controllable temperature gradient in the solidification process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation scheme of Ni718 alloy material parts:

[0037] 1) modeling

[0038] Establish Ni718 alloy material part model, cuboid model, length × width × height: 100mm × 20mm × 10mm.

[0039] 2) Selected processing technology

[0040] Select processing technology, laser power P=300W~500W, laser spot diameter d=1mm, spot moving speed v=0.005m / s~0.05m / s, powder feeding speed δ=0.1mm 3 / s~2mm 3 / s.

[0041] 3) Single pass cladding experiment

[0042] Select the appropriate processing substrate according to the specific material. Here, 304 stainless steel sheet is selected, and the processing parameters selected in 2) are used to conduct a single-pass cladding experiment. The single-pass cladding width is 1.0mm-1.5mm and the single-pass height is 0.2mm. ~0.5mm.

[0043] 4) Model slicing and processing trajectory design

[0044] The model is sliced ​​and layered, with a layer thickness of 0.2mm to 0.5mm; according to the set overlap rate of 20% to 30% and the width of...

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Abstract

The invention relates to a method for 3D printing metal materials with controllable temperature gradient in the solidification process. The steps are: 1) Establish the CAD model of metal material parts; 2) Select the processing technology; 3) Single-pass cladding experiment; 4) Model slicing and processing trajectory design; 5) Use finite element analysis software to simulate the temperature field in the processing process ;6) Divide the processing area; 7) Fit the temperature-time curve of the feature point; 8) Set the temperature gradient; 9) Solve the control signal of each resistance wire on the platform; 10) Laser 3D printing. The present invention can control the temperature gradient of the forming process in the processing process, obtain metal materials with low residual stress and good mechanical properties, and greatly save costs; the temperature gradient of the processing process can also be set according to requirements, so as to prepare metal materials in a directional manner .

Description

technical field [0001] The invention relates to a method for 3D printing metal materials with controllable temperature gradient in the solidification process. Specifically, in the laser 3D printing process, the temperature field of the forming process is simulated and calculated in advance, and then a series of control signals are generated according to the calculated results. Combined with the substrate heating system to control the temperature of each area on the substrate surface, and then control the temperature gradient of the metal solidification process. The invention belongs to the technical field of 3D printing. technical background [0002] 3D printing technology is a method of manufacturing products by adding materials layer by layer based on 3D CAD model data, which is completely opposite to the traditional processing method of cutting materials. Compared with traditional processing, 3D printing has the advantages of high raw material utilization rate, short des...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/08
Inventor 李多生谭树杰秦庆华王辉王明娣周亮廖小军蒋磊洪跃李锦锦
Owner NANCHANG HANGKONG UNIVERSITY
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