Unlock instant, AI-driven research and patent intelligence for your innovation.

Gas atomization spraying disc for preparing nano-particle reinforced metal-matrix composite powder

A metal-based composite and nanoparticle technology, applied in the direction of additive processing, etc., can solve the problems of poor uniform dispersion of nanoparticles, decreased alloy performance, and impact on mechanical properties, so as to improve industrial production efficiency, reduce powder oxygen content, reduce The effect of production costs

Active Publication Date: 2021-09-17
CENT SOUTH UNIV +1
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, mechanical alloying to achieve powder metallurgy combination is difficult to apply to additive manufacturing. Metal elements such as Fe, Al, and Ti are easily oxidized during mechanical alloying, which reduces the performance of the alloy; The composition is uncontrollable, and the uniform dispersion of nanoparticles is poor, which ultimately affects the mechanical properties; mechanically alloyed powders are mostly non-spherical powders, with poor fluidity and filling properties, and cannot be printed by direct energy deposition or powder bed fusion.
[0005] Among the spray discs that have been applied or reported so far, there is no new atomization spray disc that can realize the preparation of nanoparticle-reinforced metal matrix composite powders (spray discs that enable atomization powder making and nanoparticle reinforcement to be completed simultaneously), so , based on the advantages of high sphericity, no inclusions, and low oxygen content of gas atomized powder, the development of a spray plate that can directly atomize and prepare nanoparticle-reinforced MMCs powder has great application prospects and urgent industrialization needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gas atomization spraying disc for preparing nano-particle reinforced metal-matrix composite powder
  • Gas atomization spraying disc for preparing nano-particle reinforced metal-matrix composite powder
  • Gas atomization spraying disc for preparing nano-particle reinforced metal-matrix composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The gas atomization spray plate of this application is used for the preparation of rare earth oxide particle reinforced nickel-based superalloy composite powder, and the ODS nickel-based alloy spherical powder is prepared by gas atomization for vacuum induction melting. The specific process is: put the MA754 alloy in the smelting In the furnace, when the nickel-based superalloy is melted and reaches the required atomization temperature, it is poured into the tundish, and the molten nickel-based superalloy liquid flows out through the tundish leakage hole into the metal liquid flow channel of the nozzle, and the high-pressure gas passes through the first nozzle. The MA754 alloy liquid is atomized into spherical metal droplets; at the same time, the second medium flow channel is connected to the powder supply cylinder filled with nano-yttrium oxide, and the gas drives the nano-yttrium oxide powder to be ejected from the second nozzle, so that the nano-yttrium oxide powder a...

Embodiment 2

[0041] The gas atomization spray plate of this application is used for the preparation of spherical nano-silicon carbide particle-reinforced aluminum-based high thermal conductivity composite powder, and the preparation of high thermal conductivity aluminum-based spherical powder for vacuum induction melting gas atomization, the specific process is: the first medium flow channel Connect the powder supply cylinder filled with nano-silicon carbide, and the low-pressure gas drives the nano-silicon carbide particles to spray and converge on the central melt through the first nozzle. Put the 6XXX series alloy in the melting furnace. When the 6XXX series alloy melts and reaches the required atomization temperature, it is poured into the tundish. The melted and heat-conducting 6XXX series alloy liquid flows out through the leak hole of the tundish. The outflowing alloy liquid will first meet The airflow entraining nano-silicon carbide powder ejected from the first nozzle will compound...

Embodiment 3

[0043] The gas atomization spray disc of this application is used for the preparation of spherical nano-alumina particles reinforced copper high-strength and high-conductivity composite powder, and the copper alloy spherical powder is prepared for induction melting gas atomization. The specific process is: place the copper alloy on a vacuum electrode for induction In the smelting furnace, the injection angles of the first nozzle and the second nozzle are at the same focus, the first medium flow channel is connected to the powder supply cylinder filled with nano-alumina, the second medium flow channel is connected to the high-pressure atomizing gas, and the high-strength and high-conductivity copper alloy mist The composite powder will be formed, and the aluminum oxide reinforced dispersed copper alloy composite spherical powder will be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a gas atomization spraying disc for preparing a nano-particle reinforced metal-matrix composite powder. The gas atomization spraying disc for preparing the nano-particle reinforced metal-matrix composite powder comprises a spraying disc main body, an upper spraying disc piece and a lower spraying disc piece, wherein the spraying disc main body, the upper spraying disc piece and the lower spraying disc piece are assembled in a sealed mode; a metal liquid flow passage is formed in the center of the upper spraying disc piece; a first gas inlet, a first gas chamber, a second gas inlet and a second gas chamber are formed in the spraying disc main body; the first air inlet communicates with the first air chamber; and the second air inlet communicates with the second air chamber; a first nozzle communicating with the first air chamber is formed between the outer peripheral face of the lower part of the upper spraying disc piece and the spraying disc main body; and a second nozzle communicating with the second air chamber is formed between the inner peripheral face of the upper part of the lower spraying disc piece and the spraying disc main body. According to the gas atomization spraying disc for preparing the nano-particle reinforced metal-matrix composite powder, metal matrix atomization powder preparation and nano-particle reinforcement are synchronously completed, so that the industrial production efficiency of composite powder is improved, energy consumption is reduced, the production cost and the oxygen content of the powder are reduced, the powder component stability is improved, and the preparation process of the nano-particle reinforced metal matrix composite powder is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of metallurgical powder preparation, in particular to a gas atomization spray plate for preparing nanoparticle-reinforced metal matrix composite powder. Background technique [0002] In recent years, the iteration speed of high-tech industries such as transportation, aerospace and new energy has accelerated, which has promoted the rapid transformation and upgrading of advanced intelligent manufacturing industries. Complex workpieces with properties such as radiation, high thermal conductivity, and oxidation resistance have been used in cutting-edge fields such as aerospace engines, nuclear reactors, and integrated circuits. Metal matrix composites (MMCs) have attracted much attention due to their excellent comprehensive properties such as high specific strength, specific modulus, high thermal conductivity, heat resistance, wear resistance, and low thermal expansion. The highly dispersed second phase particle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00B33Y40/00B33Y70/10
CPCB22F9/082C22C32/0026B33Y40/00B33Y70/10B22F2009/0848B22F2009/0824B22F2009/0892B22F2009/0888Y02P10/25
Inventor 陈超耿赵文耿通刊周科朝张桃梅吴谊友李丹张家琪
Owner CENT SOUTH UNIV