Preparation method for complex-shape niobium-based ODS (oxide dispersion strengthening) alloy

A complex shape, niobium-based technology, applied in the field of refractory metal preparation, to achieve the effect of short manufacturing cycle, high material utilization rate and high density

Active Publication Date: 2013-04-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing niobium-based ODS alloys by laser rapid prototyping technology, which aims to solve the problems of densification of niobium-based ODS alloys and the forming of parts with complex shapes, and has the advantages of high density, excellent comprehensive mechanical properties and utilization of raw material powder Advantages such as high rate

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  • Preparation method for complex-shape niobium-based ODS (oxide dispersion strengthening) alloy

Examples

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Effect test

Embodiment 1

[0013] Example 1: Preparation of Nb-Al-based ODS alloy with complex shape

[0014] Use high-purity niobium powder, aluminum powder and Y with particle size of 20~30nm 2 o 3 Powder is used as the raw material, and the ratio is as follows: 15wt.%Al-0.3wt.%Y 2 o 3 - margin Nb. Add 0.5wt.% stearic acid to the raw material powder and pre-mix evenly, and then carry out high-energy ball milling of the mixed powder in a high-purity Ar atmosphere to make Y 2 o 3 The particles are uniformly dispersed in the niobium matrix, the ball / material ratio is 15 / 1, the rotational speed of the ball mill is 380 rpm, and the ball milling time is 40 hours to obtain niobium-based ODS alloy powder. Secondly, CAD software is used to design the 3D solid model of the part, and then the 3D model is sliced ​​into layers to discretize it into a series of 2D layers. At the same time, the powder spreading system of the SLM forming machine spreads a layer of niobium-based ODS alloy powder on the working...

Embodiment 2

[0015] Example 2: Preparation of Nb-Al-based ODS alloy with complex shape

[0016] Use high-purity niobium powder, aluminum powder and Y with particle size of 20~30nm 2 o 3 Powder is used as raw material, and the ratio is as follows: 20wt.%Al-1.0wt.%Y 2 o 3 - margin Nb. Add 1wt.% stearic acid to the raw material powder and pre-mix evenly, and then carry out high-energy ball milling of the mixed powder in a high-purity Ar atmosphere to make Y 2 o 3 The particles are uniformly dispersed in the niobium matrix, the ball / material ratio is 15 / 1, the rotational speed of the ball mill is 380 rpm, and the ball milling time is 40 hours to obtain niobium-based ODS alloy powder. Secondly, CAD software is used to design the 3D solid model of the part, and then the 3D model is sliced ​​into layers to discretize it into a series of 2D layers. At the same time, the powder spreading system of the SLM forming machine spreads a layer of niobium-based ODS alloy powder on the working platf...

Embodiment 3

[0017] Example 3: Preparation of complex shape Nb-Al-Ti based ODS alloy

[0018] High-purity niobium powder, aluminum powder, titanium powder and Y powder with particle size of 20~30nm 2 o 3 Powder is the raw material, and the proportion is as follows: 15wt.%Al-25wt.%Ti-1.5wt.%Y 2 o 3 - margin Nb. Add 1.5wt.% stearic acid to the raw material powder and pre-mix evenly, and then carry out high-energy ball milling of the mixed powder in a high-purity Ar atmosphere to make Y 2 o 3 The particles are uniformly dispersed in the niobium matrix, the ball / material ratio is 15 / 1, the rotational speed of the ball mill is 380 rpm, and the ball milling time is 40 hours to obtain niobium-based ODS alloy powder. Secondly, CAD software is used to design the 3D solid model of the part, and then the 3D model is sliced ​​into layers to discretize it into a series of 2D layers. At the same time, the powder spreading system of the SLM forming machine spreads a layer of niobium-based ODS all...

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Abstract

The invention relates to a preparation method for complex-shape niobium-based ODS (oxide dispersion strengthening) alloy by taking high-energy ball-milled niobium-based ODS alloy powder as a raw material and adopting a laser rapid prototyping technology, belonging to the technical field of refractory metal preparation. The method comprises the following steps of firstly obtaining niobium-based ODS alloy powder through a mechanical alloying technology, then depositing the niobium-based ODS alloy powder layer by layer by controlling the motion of a laser beam through two-dimensional plane information on the basis of establishment of three-dimensional model and layering slicing treatment to obtain a niobium-based ODS alloy powder green body, and finally completely compacting the niobium-based ODS alloy powder green body through hot isostatic pressing, so as to obtain complex-shape niobium-based ODS alloy parts. The method has low cost, can be used for preparing complex-shape parts rapidly and efficiently, and is applicable to final forming of niobium-based ODS alloy which is difficult to process and has high performance; the parts have high compactness, small, uniform and stable fast solidification structure, and excellent comprehensive mechanical property; and the material use ratio is high, the manufacturing period is short, and the cost is low.

Description

Technical field [0001] The present invention is a method of difficulty melting metal preparation technology. It specially provides a method of using mechanical alloy powder as raw materials and using laser fast forming technology to prepare the alloy alloy of Oxide Dispersion Streangthening (ODS). Background technique [0002] The density of the cymbal alloy in the difficult melting metal has the advantages of high melting point, excellent high temperature mechanical properties, and good welding performance.The melting point of the current commonly used nickel -based high -temperature alloy is about 1300 ~ 1400 ° C, and the maximum use temperature has reached about 1200 ° C, which is close to the temperature limit of the use of the material.The cymbal alloy is a high -temperature structural material with a higher temperature, which has important uses in key parts in the aviation and aerospace fields.Cyclical alloys are generally made of melting, squeezing, forging and mechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C27/02
Inventor 章林曲选辉秦明礼刘烨何新波
Owner UNIV OF SCI & TECH BEIJING
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