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A Supersonic Atomizing Nozzle with Adjustable Structural Parameters

A technology for atomizing nozzles and structural parameters, which is applied in the field of supersonic atomizing nozzles, can solve the problems of flexible adjustment of the protruding length of the gas mass flow diversion pipes with difficult structures, reducing the versatility of atomizing nozzles, etc., so as to prevent pollution and improve the universality. sexual effect

Inactive Publication Date: 2018-02-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the atomization of different metals has inconsistent requirements on the process parameters, different atomization parameters are required for different atomization objects, and the above-mentioned patents involve nozzles that are difficult to achieve flexible adjustment of the gas mass flow rate and the protruding length of the draft tube due to structural limitations, reducing the The versatility of the atomizing nozzle

Method used

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  • A Supersonic Atomizing Nozzle with Adjustable Structural Parameters
  • A Supersonic Atomizing Nozzle with Adjustable Structural Parameters
  • A Supersonic Atomizing Nozzle with Adjustable Structural Parameters

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specific Embodiment approach

[0029] Taking the atomization of the 7055 alloy by the flexible supersonic atomizing nozzle involved in the present invention as an example, the specific embodiments of the present invention are as follows:

[0030] (1) Adjust the structural parameters of the nozzle, select the protruding length of the draft tube h = 6mm, and the width of the air outlet d 0 =0.5mm;

[0031] (2) Melting the 7055 parent alloy to 800°C in a vacuum or inert gas protection atmosphere;

[0032] (3) The molten metal melt enters the high-speed gas atomization zone through the guide tube 10, and the atomization argon gas supply device is opened at the same time, and the molten 7055 alloy is atomized when the atomization pressure is 0.8MPa;

[0033] (4) Collect the metal powder after the atomization is completed, and select the test sample A;

[0034] (5) Readjust the structural parameters of the nozzle and select the width d of the air outlet 0 =0.6mm, repeat steps (2)~(4) to obtain test sample B; ...

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Abstract

The invention provides a supersonic atomizing nozzle with adjustable structure parameters. The supersonic atomizing nozzle with the adjustable structure parameters comprises an upper mold, a lower mold, a flow guide pipe bushing and a flow guide pipe, wherein the upper mold and the lower mold are connected through a fastening bolt; the lower mold is provided with two coaxial high-pressure atomizing air inlets; the flow guide pipe bushing penetrates through the upper mold and the lower mold and is fixed to the upper mold through an inner contracting and outer expansion type expansion sleeve; the lower portion of the flow guide pipe bushing and the lower mold are matched to form two airflow outlets; the lower portion of the flow guide pipe bushing is shaped like a frustum; the curve shape of the wall surface of the matching part of the lower mold is of a Laval type, and the airflow outlets are each of a semi-Laval circular seam type; and the flow guide pipe is located in the flow guide pipe bushing and penetrates through the flow guide pipe bushing. According to the supersonic atomizing nozzle with the adjustable structure parameters, the structure parameters of the nozzle can be flexibly selected according to different kinds of atomizing metal, and the universality of the atomizing nozzle is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of fine powder preparation by an inert gas atomization method, and in particular relates to a supersonic atomization nozzle with adjustable structural parameters. Background technique [0002] Gas atomization is the main method for producing metal and alloy powders. The production of atomized powder has the advantages of high sphericity, controllable powder particle size, low oxygen content and adaptability to the production of various metal and alloy powders. It has become the main development direction of high-performance metal and alloy powder preparation technology. [0003] The basic principle of gas atomization is the process of using high-speed inert gas flow to impact the metal liquid flow, crushing it into small droplets, cooling and solidifying into powder. The core of gas atomization is to convert the kinetic energy of the gas flow into the surface energy of the atomized droplet to the greatest e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/088
Inventor 司朝润武伟超
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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