Method for forming functional graded part through selective laser melting

A technology of selective laser melting and functional gradient, applied in metal material coating process, coating and other directions, can solve the problems of complex forming process, and achieve the effect of reducing production cost, saving total forming time, and reducing the number of times

Active Publication Date: 2016-03-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Or, after forming one material, turn on the forming equipment, clean out all the powder and then spread another powder, repeat vacuuming, fill with argon, and then complete the forming process, so as to realize the forming of functionally graded materials. The forming process is more complicated

Method used

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  • Method for forming functional graded part through selective laser melting
  • Method for forming functional graded part through selective laser melting
  • Method for forming functional graded part through selective laser melting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for forming functionally graded parts by using selective laser melting forming technology, comprising the following steps:

[0023] (1) Establish a three-dimensional model of the functionally graded part on the computer, then convert the three-dimensional model of the part into STL format and import it into the laser melting forming equipment for selected areas;

[0024] (2) Place the 316L stainless steel powder in the powder bed of the equipment, and place the Inconel718 powder suitable for selective laser melting into the powder feeding hopper of the equipment; among them, both the 316L stainless steel powder and the Inconel718 powder are spherical or nearly spherical, with an average The particle size is 30μm and the oxygen content is lower than 1000ppm;

[0025] (3) Start the selected area laser melting forming equipment, use the powder feeding cylinder and powder spreading roller to spread a layer of 316L stainless steel powder on the powder bed, the laser...

Embodiment 2

[0028] A method for forming functionally graded parts by using selective laser melting forming technology, comprising the following steps:

[0029] (1) Establish a three-dimensional model of the functionally graded part on the computer, then convert the three-dimensional model of the part into STL format and import it into the laser melting forming equipment for selected areas;

[0030] (2) Place the 316L stainless steel powder in the powder bed of the equipment, and place the Inconel718 powder suitable for selective laser melting into the powder feeding hopper of the equipment;

[0031] Among them, 316L stainless steel powder and Inconel718 powder are both spherical or nearly spherical, with an average particle size of 37.5 μm and an oxygen content of less than 1000 ppm;

[0032] (3) Start the selected area laser melting forming equipment, use the powder feeding cylinder and powder spreading roller to spread a layer of 316L stainless steel powder on the powder bed, the laser ...

Embodiment 3

[0035] A method for forming functionally graded parts by using selective laser melting forming technology, comprising the following steps:

[0036] (1) Establish a three-dimensional model of the functionally graded part on the computer, then convert the three-dimensional model of the part into STL format and import it into the laser melting forming equipment for selected areas;

[0037] (2) Place the 316L stainless steel powder in the powder bed of the equipment, and place the Inconel718 powder suitable for selective laser melting into the powder feeding hopper of the equipment;

[0038] Among them, 316L stainless steel powder and Inconel718 powder are both spherical or nearly spherical, with an average particle size of 45 μm and an oxygen content of less than 1000 ppm;

[0039] (3) Start the selected area laser melting forming equipment, use the powder feeding cylinder and powder spreading roller to spread a layer of 316L stainless steel powder on the powder bed, the laser so...

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Abstract

The invention discloses a method for forming a functional graded part through selective laser melting. The method includes the following steps that firstly, a part three-dimensional model is guided into a selective laser melting forming device; secondly, powder A is put into a powder feeding bed, and powder B is placed into a powder feeding bucket; thirdly, the powder A is formed firstly, and the powder B is formed; and fourthly, a linear cutting technology is used for separating the graded part from a base plate and annealed in a muffle furnace, and a finished product is obtained. According to the method for forming the functional graded part through selective laser melting, a powder bed used during powder bed additive manufacturing is used for laying powder, a powder feeding bucket powder discharging technology is combined, a functional graded material can be formed at a time, the total forming time is shortened, the number of times of vacuum pumping and argon charging is reduced, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing of gradient materials, and more specifically relates to a method for forming functionally gradient parts by adopting a selective laser melting forming technology. Background technique [0002] The concept of functionally gradient materials (Functionally GradientMaterials, referred to as FGM) was first proposed by Japanese scholars Shinno Masaoyuki, Hirai Toshio and Watanabe Ryu in 1987. From the material point of view, functionally graded materials are different from homogeneous materials and composite materials. It uses two (or more) materials with different properties, and continuously changes the composition or structure of the two (or more) materials to ease or even disappear the interface. The performance of the material changes slowly with the composition or structure of the material, forming a functionally graded material, thereby adapting to different environments and reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 魏青松周燕史玉升文世峰滕庆田乐
Owner HUAZHONG UNIV OF SCI & TECH
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