Metal 3D printing product production method by means of low-power laser sintering

A laser sintering and 3D printing technology, which is applied in the field of high temperature sintering, alloying and densification to produce metal parts products, can solve the problems of high cost and complicated equipment maintenance.

Inactive Publication Date: 2014-05-07
王利民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the shortcomings of high cost and complicated equipment maintenance of current 3D printing technology, this invention develops a production method of metal 3D printing products by low-power laser sintering method

Method used

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Examples

Experimental program
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Embodiment Construction

[0013] The invention is described below in conjunction with specific embodiments.

[0014] Using 3D printing of titanium alloy Ti-6Al-4V (TC4) metal parts as an example, the description is as follows:

[0015] one. Preparation of Metal Powder Mixtures for Thermoplastic Forming

[0016] (1) Select titanium alloy Ti-6Al-4V (TC4) brand spherical metal powder with average particle size D50=25μm

[0017] (2) Thermoplastic molding binder composition: 50% paraffin + 50% polyethylene

[0018] (3) Mixing: 60% metal powder content + 40% molding binder volume content, using a 5 kg screw mixer, mixing 20 kg of the mixture at a temperature below 120 ° C for 20 hours.

[0019] two. broken

[0020] The kneaded metal powder is mixed into agglomerates and crushed into fine particles by a jet mill, and the particle size is generally controlled below 50um.

[0021] three. 3D printing formed metal parts green body

[0022] (1) Select a commercially available 40W low-power selec...

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Abstract

The invention discloses a metal 3D printing product production method by means of low-power laser sintering. According to the metal 3D printing product production method, metal powder materials and thermoplastic molding adhesives are adopted to prepare a low-melting-point 3D metal printing raw material mixture; due to the fact that the thin-layer thermoplastic adhesives are formed on the surfaces of metal powder particles, low-power (smaller than 50 W) selective laser sintering or electron beam sintering 3D printer is used, the metal powder materials are stacked to be molded through surface layer thermoplastic adhesive low-temperature melting-cooling adhesive solidification, then metal part product green bodies can be printed through the prepared metal powder raw materials, the molded adhesives in the part green bodies are removed through thermal debinding or chemocatalysis debinding or other technologies, high-temperature sintering is conducted on the green bodies without the molded adhesives through a vacuum sintering method or an atmosphere protection sintering method, and alloying compact high-performance complex metal part products are produced. The metal 3D printing product production method by means of low-power laser sintering has the advantage that the 3D printing device and technology for producing the metal parts are low in cost.

Description

technical field [0001] The invention relates to a method of adding a thermoplastic organic adhesive to metal powder, printing a green body of a metal product containing an adhesive through a low-power selective laser sintering or electron beam sintering method 3D printer, and then removing the green body adhesive 1. A method and equipment for producing metal parts and components through high-temperature sintering and alloying densification. [0002] Background technique [0003] 3D printing production technology is a kind of near-net shape additive manufacturing technology. Its principle is that the software decomposes the three-dimensional parts and components designed by the computer into several layers of plane slices, and prints them out through 3D printers to produce the required parts of different materials. Component products; because of its advantages of flexibility, customization, and rapid near-net molding to produce parts of different materials with complex struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B28B1/00
CPCY02P10/25
Inventor 王利民
Owner 王利民
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