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Method for preparing laser rapid forming rhenium spraying pipe

A laser rapid prototyping and nozzle technology, applied in the field of nozzle preparation, can solve the problems of low processing efficiency, increased material brittleness, unavoidable powder oxidation, etc., and achieve the effects of short processing cycle, low cost, and excellent comprehensive performance.

Active Publication Date: 2014-12-10
TAICANG PAIOU TECH CONSULTING SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Both of the above two inventions can produce nozzles with high melting points, but the oxidation of the powder cannot be avoided during the preparation process, which increases the brittleness of the prepared material; molds are required in the preparation process, and the processing efficiency is low

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  • Method for preparing laser rapid forming rhenium spraying pipe

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Embodiment 1

[0023] A preparation method of laser rapid prototyping rhenium nozzle is characterized in that comprising the following steps:

[0024] (1) Use CAD drawing software to design the three-dimensional solid model of the nozzle, and use the discrete program to slice the model to obtain a multi-layer two-dimensional section of the solid model, and save it as an STL file, and transfer the data of the STL file to the selective laser Melting rapid prototyping system;

[0025] (2) Evenly mix the Re (rhenium) powder and the organic binder into the powder tank of the 3D printer, and the organic binder accounts for 10% of the total amount of the mixture;

[0026] (3) Pass protective gas into the molding cylinder of 3D printer;

[0027] (4) Evenly spread a layer of mixed powder with a thickness of 0.08mm on the working table with a powder spreading roller, and preheat the working table to 100°C;

[0028] (5) The scanning speed of the designed laser is 20mm / s, the sintering temperature is ...

Embodiment 2

[0034] A preparation method of laser rapid prototyping rhenium nozzle is characterized in that comprising the following steps:

[0035] (1) Use CAD drawing software to design the three-dimensional solid model of the nozzle, and use the discrete program to slice the model to obtain a multi-layer two-dimensional section of the solid model, and save it as an STL file, and transfer the data of the STL file to the selective laser Melting rapid prototyping system;

[0036] (2) Evenly mix the Re (rhenium) powder and the organic binder into the powder tank of the 3D printer, and the organic binder accounts for 20% of the total amount of the mixture;

[0037] (3) Pass protective gas into the molding cylinder of 3D printer;

[0038] (4) Evenly spread a layer of mixed powder with a thickness of 0.3mm on the working table with a powder spreading roller, and preheat the working table to 200°C;

[0039] (5) The scanning speed of the designed laser is 200mm / s, the sintering temperature is ...

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Abstract

The invention provides a method for preparing a laser rapid forming rhenium spraying pipe. The method is characterized by comprising the following steps that firstly, a spraying pipe three-dimensional solid model is designed through the CAD, the model is sliced into a multi-layer two-dimensional profile to be saved as an STL file, and data are transmitted to a laser melting rapid forming system; secondly, Re powder and an organic binding material are evenly mixed and placed in a powder cylinder; thirdly, the protection gas is injected; fourthly, a layer of mixed powder is laid on a workbench top, and a workbench is preheated; fifthly, the scanning speed, the sintering temperature and the like of a laser are designed, and the laser is controlled to carry out sintering according to first layer section information; sixthly, the workbench descends by a certain height, powder continues to be laid, and new-round scanning and sintering are started; seventhly, the sixth step is repeatedly executed till three-dimensional solid parts are stacked; eighthly, high-temperature roasting is carried out. According to the method, high technique integration is achieved, the machining period is short, a die is not needed, and batched production can be achieved; through the protection gas, the powder is prevented from being oxidized, and the manufactured spraying pipe has superior comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method of a nozzle, in particular to a preparation method of a laser rapid forming rhenium nozzle. technical background [0002] The nozzle is a device that accelerates the airflow by changing the geometric shape of the inner wall of the pipe section. It is mostly used in aerospace fields such as aircraft and rockets. Usually, the working conditions of the nozzle are harsh. Under non-cooling conditions, the nozzle must directly withstand 2500-3600 ℃ high temperature, 4 ~ 7MPa high pressure and 1500 ~ 2500m / s high speed, and need to withstand the erosion and erosion of gas containing solid particles, so the performance requirements of the material are high, not only the material bearing capacity is required, but also the heat resistance is required powerful. As a commonly used aviation material, Re (rhenium) has high elastic modulus, excellent tensile strength, creep limit, durable strength and thermal shock resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F5/12
Inventor 陈照峰沙李丽
Owner TAICANG PAIOU TECH CONSULTING SERVICE