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A post-treatment method for strengthening the surface wear resistance of 3D printed metal parts

A technology of 3D printing and wear resistance, which is applied in the field of surface engineering, can solve the problems of low wear resistance and poor surface wear resistance of 3D printed metal parts, and achieve simple surface protection, friction stir processing and spraying process. The effect of flexible designability

Active Publication Date: 2020-12-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the inherent limitation of the low wear resistance of metals, it is difficult to effectively solve the shortcoming of poor wear resistance on the surface of 3D printed metal parts by adopting the design idea of ​​developing new 3D printing alloy powder materials

Method used

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  • A post-treatment method for strengthening the surface wear resistance of 3D printed metal parts
  • A post-treatment method for strengthening the surface wear resistance of 3D printed metal parts
  • A post-treatment method for strengthening the surface wear resistance of 3D printed metal parts

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as Figure 1-3 As shown, firstly, the metal parts with flat or simple curved surface shape are pre-prepared by metal 3D printing technology; secondly, the corresponding post-treatment process is adopted according to the surface shape of the metal parts: the surface of the 3D printed metal substrate to be modified is machined Prefabricate a groove or a row of blind holes along the center line, and clean and decontaminate the surface of the block; then add the reinforcement phase to the groove or blind hole, and use the same and dissimilar metal sheets to cover the surface, and finally use a stirring tool The surface of the 3D printed metal block is subjected to 1, 2, and 3 passes of friction stir processing of the surface wear-resistant coating in the same direction for surface enhancement treatment.

[0027] Friction stir processing is used to prepare wear-resistant coatings. The additive raw material is pure ceramic powder or a mixture of metal alloy powder and ce...

Embodiment 2

[0029] Such as Figure 4-5 As shown, firstly, the metal parts with flat or simple curved surface shapes are pre-prepared by metal 3D printing technology; secondly, the corresponding post-treatment process is adopted according to the surface shape of the metal parts: cleaning and cleaning the surface of the 3D printing metal block to be modified Sand blasting treatment, using thermal spraying or cold spraying technology to spray pre-mixed powder raw materials, and then prepare a wear-resistant coating on the surface of the 3D printing metal block to be modified, and finally use a stirring tool to perform the same treatment on the surface of the 3D printing block 1, 2, and 3 passes in the direction of surface enhancement treatment for friction stir modification.

[0030] Metal 3D printing technology is selective laser melting technology, electron beam additive manufacturing, arc additive manufacturing technology or other metal additive manufacturing technology, 3D printing metal...

Embodiment 3

[0032] Such as Figure 6-7 As shown, metal parts with complex curved surfaces are pre-prepared by metal 3D printing technology; secondly, corresponding post-treatment processes are adopted according to the surface shape of metal parts: first, the surface of the 3D printed metal block to be modified is cleaned and sprayed. Sand treatment, pre-design the trajectory of the spray gun, spray the pre-mixed powder by thermal spraying or cold spraying technology, and prepare a wear-resistant coating on the surface of the 3D printing metal block to be modified.

[0033] Metal 3D printing technology is selective laser melting technology, electron beam additive manufacturing, arc additive manufacturing technology or other metal additive manufacturing technology, 3D printing metal materials are aluminum alloy, stainless steel, titanium alloy, or nickel-based superalloy, thermal The spraying technology is atmospheric plasma spraying, supersonic flame spraying, vacuum plasma spraying or low...

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Abstract

The invention discloses a post-processing method for strengthening 3D printing metal part surface abrasion resistance. The method includes the steps that a metal part with a certain surface shape is pre-prepared with a metal 3D printing technology at first, and then a corresponding post-processing technology is adopted according to the surface shape of the metal part; a groove or a blind hole is preformed in the surface of a metal block, cleaning and stain removing are conducted, a reinforced phase is added into the groove or the blind hole, and then a metal sheet is covered; or the surface ofthe metal block is subjected to cleaning and sand blasting at first, a spraying technology is adopted to spray a pre-mixed powder raw material, abrasion-resistant coating preparation is conducted onthe surface of the metal block, and finally a stirring tool is used for conducting the first pass, the second pass and the third pass of stirring friction modified surface enhancement processing on the surface of the metal block in the same direction. By adoption of the method, the abrasion resistance of mechanical parts is greatly improved, the service life is prolonged, stirring friction processing and spraying processes are simple, surface protection of metal 3D printed plates or complex parts of different dimensions is achieved, more effectiveness and economy are realized and automation can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a post-processing method for enhancing the wear resistance of the surface of 3D printed metal parts. Background technique [0002] 3D printing metal and alloy is one of the most cutting-edge and potential industries at present, and it is the key research direction of advanced metal material manufacturing technology. Its main advantages are high density and high dimensional accuracy of molded parts. Compared with traditional subtractive manufacturing, it can save a lot of materials and can be directly used to manufacture precision metal parts of various complex shapes. It can be used in complex molds, personalized medical parts , Aerospace and automotive industries have outstanding technological advantages. [0003] At present, metal 3D printing has covered different material systems such as aluminum alloy, stainless steel, titanium alloy and nickel-based superalloy, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/24
Inventor 黄春杰刘剑
Owner SICHUAN UNIV
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