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Preparation process of multi-component spherical alloy powder

A technology of alloy powder and preparation process, which is applied in the field of metal powder processing, can solve the problems of difficulty in smelting and bar making, high melting point hardness, and brittle fracture, etc., and achieve the effects of high sphericity, high tap density and low output

Active Publication Date: 2022-04-15
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a single refractory metal or its compound, due to its high melting point and high hardness, it is easy to be brittle, making it difficult to smelt and make rods, and the use of PREP method to prepare powder is limited.

Method used

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  • Preparation process of multi-component spherical alloy powder
  • Preparation process of multi-component spherical alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: A preparation process of multi-component spherical alloy powder, using the PREP method to prepare multi-component spherical alloy powder, the multi-component alloy includes at least one of refractory metals and their compounds, specifically including tungsten and molybdenum , tantalum, niobium, rhenium, tungsten carbide, tantalum carbide, etc.

[0043] Its concrete preparation method is:

[0044] 2.1 Prepare multi-component alloy rods;

[0045] 2.2 Use the alloy rod in step 2.1 to prepare multi-component spherical alloy powder by the PREP method.

[0046] In this embodiment, the spatial structure weaving method is used to prepare multi-component alloy rods, and the specific preparation method is as follows:

[0047]3.1 Design the size and structure of the mesh according to the size and shape of the refractory metal or its compound, and use the metal components that are easy to weave in the multi-components to make wires and weave the mesh to form a metal me...

Embodiment 2

[0052] Example 2: A preparation process for a multi-component spherical alloy powder, using the PREP method to prepare a multi-component spherical alloy, the multi-component includes at least one of refractory metals and their compounds, specifically including tungsten, molybdenum, and tantalum , niobium, rhenium, tungsten carbide, tantalum carbide, etc. Its concrete preparation method is:

[0053] 2.1 Prepare multi-component alloy rods;

[0054] 2.2 Use the alloy rod in step 2.1 to prepare multi-component spherical alloy powder by the PREP method.

[0055] In this embodiment, a multi-component alloy rod is prepared by direct mixing of elements, and the specific preparation method is as follows:

[0056] 4.1 Do the powder batching according to the element ratio of the target multi-component alloy, and then use a planetary high-energy ball mill for mechanical ball milling. During the ball milling process, use argon protection to prevent the powder from being oxidized during t...

Embodiment 3

[0064] Example 3: A preparation process for a multi-component spherical alloy powder, using the PREP method to prepare a multi-component spherical alloy, the multi-component includes at least one of refractory metals and their compounds, specifically including tungsten, molybdenum, and tantalum , niobium, rhenium, tungsten carbide, tantalum carbide, etc. Its concrete preparation method is:

[0065] 2.1 Prepare multi-component alloy rods;

[0066] 2.2 Use the alloy rod in step 2.1 to prepare multi-component spherical alloy powder by the PREP method.

[0067] In this embodiment, the porous skeleton method is used to prepare multi-component alloy rods, and the specific preparation method is as follows:

[0068] 7.1 Use refractory metals or hard alloys with large particle sizes as raw materials, mix them with spherical pore-forming agents and put them into a mixer for mixing; the pore-forming agents are stearic acid or urea.

[0069] In this step, a spherical pore-forming agent...

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Abstract

The invention discloses a preparation process of multi-component spherical alloy powder, the multi-component spherical alloy powder is prepared by adopting a plasma rotation electrode atomization (PREP) method, the multi-component alloy comprises at least one of refractory metals and compounds thereof, and the multi-component alloy specifically comprises tungsten, molybdenum, tantalum, niobium, rhenium, tungsten carbide, tantalum carbide and the like. The multi-component spherical alloy powder containing the refractory metal or the compound of the refractory metal is prepared through the PREP method, the prepared multi-component spherical alloy powder is high in sphericity degree, good in fluidity, high in tap density and low in impurity element content, the yield of hollow powder and satellite powder is small, and compared with other preparation methods, the prepared alloy powder is more excellent in performance and better in performance. The material is an ideal material for metal 3D printing; in addition, the invention also solves the problem that a round bar containing refractory metal or a compound base material thereof used in a PREP method is difficult to prepare, and provides a spatial structure netting method or an element direct mixing method or a porous skeleton method to prepare the multi-component alloy bar.

Description

technical field [0001] The invention relates to the technical field of metal powder processing, in particular to a preparation process of multi-component spherical alloy powder. Background technique [0002] Refractory metals and their compounds, such as tungsten, molybdenum, tantalum, niobium, rhenium, tungsten carbide, tantalum carbide, etc., are widely used in aviation due to their unique high temperature resistance, corrosion resistance, high density, wear resistance, and other special properties. It is widely used in many key fields such as aerospace, national defense and military industry, energy electronics and nuclear industry. With the development and application of powder metallurgy technology and 3D printing technology, the demand for multi-component spherical powders containing refractory metals or their compounds is increasingly strong. Spherical powder has the characteristics of good fluidity, high tap density, good wettability, good bonding with surrounding t...

Claims

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Application Information

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IPC IPC(8): B22F9/14B22F1/065B22F9/04B22F3/14B22F3/11B22F5/10
CPCY02P10/25B22F3/11B22F1/065B22F9/04B22F9/14C22C1/045B22F2009/043B22F2998/10B22F3/1134B22F5/106B22F2201/11B22F3/02B22F3/15
Inventor 卢志辉杨洪涛司旭东孙志杨张磊乐游广飞武艺泳陈超
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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