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Low-density biphase high-entropy alloy powder suitable for 3DP technology and preparation method of low-density biphase high-entropy alloy powder

A high-entropy alloy, low-density technology, applied in additive processing and other directions, can solve the problems of high manufacturing cost, low melting point alloy burning, long powder milling time, etc., to reduce the possibility of powder being oxidized, and the synthesis process is safe. , the effect of good plasticity

Inactive Publication Date: 2021-04-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The FeCoNi high-entropy alloy pre-alloyed powder prepared by the above scheme has good roundness and good particle fluidity; however, this scheme requires a vacuum system and special equipment, and its manufacturing cost is high, the milling time is long, and the efficiency is low.
In addition, casting ingots is not suitable for low-density high-entropy alloy systems, which can easily lead to low-melting point alloy burnout, and cannot obtain low-density high-entropy alloy powder materials with a set atomic ratio.
[0005] At present, no low-cost high-entropy alloy powder and its preparation technology suitable for 3DP printing technology have been developed at home and abroad.

Method used

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  • Low-density biphase high-entropy alloy powder suitable for 3DP technology and preparation method of low-density biphase high-entropy alloy powder
  • Low-density biphase high-entropy alloy powder suitable for 3DP technology and preparation method of low-density biphase high-entropy alloy powder
  • Low-density biphase high-entropy alloy powder suitable for 3DP technology and preparation method of low-density biphase high-entropy alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Selection of alloying elements and powder blending

[0051] AlTiCrVSi high-entropy alloy was designed with a theoretical density of 4.76g / cm 3 , according to the molar atomic ratio of the main elements in the high-entropy alloy AlTiCrVSi 1:1:1:1:1, calculate the mass of each component and weigh the corresponding mass with an electronic balance, put the powder into the container, and pass it into the argon Air protection, and then mix the powder on a V-type powder mixer for 24 hours until uniform.

[0052] Step 2: Preparation of AlSiTiCrNiCu high-entropy alloy powder by low-temperature ball milling process

[0053] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize and fill it with argon as a protective atmosphere, and carry out mechanical alloying on a planetary ball mill, wherein the ball-to-material ratio is 6:1, the ball milling time is 24h, and the rotation speed is The ball milling process was carried out at 4°C; aft...

Embodiment 2

[0058] Step 1: Selection of alloying elements and powder blending

[0059] AlTiCrNiSi high-entropy alloy was designed with a theoretical density of 5.30 g / cm 3 , according to the molar atomic ratio of the main elements in the high-entropy alloy AlTiCrNiSi 1:1:1:1:1, calculate the mass of each component and weigh the corresponding mass with an electronic balance, put the powder into the container, and pass it into the argon Gas protection, and then mix the powder on a V-type powder mixer for 15 hours until uniform.

[0060] Step 2: Preparation of AlTiCrNiSi high-entropy alloy powder by low-temperature ball milling process

[0061] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize and fill it with argon as a protective atmosphere, and carry out mechanical alloying on a planetary ball mill, wherein the ball-to-material ratio is 8:1, the ball milling time is 24h, and the rotation speed is The temperature is 180r / min, and the ball milling p...

Embodiment 3

[0066] Step 1: Selection of alloying elements and powder blending

[0067] AlTiCrCuSi high-entropy alloy was designed with a theoretical density of 5.31g / cm 3 , according to the molar atomic ratio of the main elements in the high-entropy alloy AlTiCrCuSi 1:1:1:1:1, calculate the mass of each component and weigh the corresponding mass with an electronic balance, put the powder into the container, and pass it into the argon Air protection, and then mix the powder on a V-type powder mixer for 24 hours until uniform.

[0068] Step 2: Preparation of AlTiCrCuSi high-entropy alloy powder by low-temperature ball milling process

[0069] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize and fill it with argon as a protective atmosphere, and carry out mechanical alloying on a planetary ball mill, wherein the ball-to-material ratio is 6:1, the ball milling time is 24h, and the rotation speed is 150r / min, and the ball milling process was carried o...

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Abstract

The invention discloses low-density biphase high-entropy alloy powder suitable for a 3DP technology and a preparation method of the low-density biphase high-entropy alloy powder. The alloy powder comprises, in molar ratio, 0-30% of Al, 0-30% of Ti, 0-20% of V, 0-20% of Cr, 0-30% of Mg, 0-20% of Ni, 0-20% of Cu, 0-30% of Si and 0-30% of B. The method comprises the steps that the above element powder is uniformly mixed to obtain mixed powder; and ball milling is conducted, screening is conducted under vacuum, powder with the particle size being 10-100 micrometers is taken, and the low-density biphase high-entropy alloy powder suitable for the 3DP technology is obtained. The high-entropy alloy material has an FCC / BCC or FCC / HCP biphase structure, has high strength and high hardness, also has good plasticity of an FCC structure and is suitable for being used for 3DP.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a low-density dual-phase high-entropy alloy powder suitable for 3DP printing technology and a preparation method thereof. Background technique [0002] High-entropy alloy material is a new type of alloy material that has emerged in the past ten years. It has high strength, high hardness, high temperature resistance, wear resistance and other functional properties, and has become a research hotspot at home and abroad. [0003] In terms of research on high-entropy alloy systems: the existing research on high-entropy alloy systems mainly focuses on transition metal elements such as Co, Cr, Fe, Ni, Mn and some metal elements with higher melting points such as Ta, Mo, Hf, Nb etc. Alloy density is higher, generally at 8.0g / cm 3 above. The main elements of low-density high-entropy alloys include Al, Ti, Mg, Li, Sn, Li, Be and non-metallic Si, B, C, N and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04C22C30/00C22C30/02B33Y70/00
CPCB22F1/0003B22F9/04C22C30/00C22C30/02B33Y70/00B22F2009/043B22F2009/041
Inventor 朱德智刘是文郑振兴刘一雄陈维平李小强
Owner SOUTH CHINA UNIV OF TECH
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