Method for preparing high temperature alloy GH 4169 metal globule by utilizing auxiliary plasma rotation electrode

A technology of GH4169 and high-temperature alloys, which is applied in the field of structural materials in the aerospace field, can solve the problems of small ball diameters and cannot meet the needs of laser three-dimensional molding technology, and achieve small ball diameters, smooth and clean powder particle surfaces, and compact equipment structures. Effect

Inactive Publication Date: 2010-12-29
张建利
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Problems solved by technology

[0004] The present invention aims at the high-temperature alloy GH4169 metal pellets prepared by the existing foreign atomization method, which cannot meet the requirements of the laser three-dimensional forming process. The high-temperature alloy GH4169 metal ball can meet the needs of the National

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  • Method for preparing high temperature alloy GH 4169 metal globule by utilizing auxiliary plasma rotation electrode

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Embodiment Construction

[0018] The method for preparing superalloy GH4169 metal pellets by using plasma-assisted rotating electrodes is implemented according to the following steps:

[0019] (1) Preparation of anode electrode rods: the high-temperature alloy GH4169 metal is refined into standard rods, and then it is refined into a plasma gun rotating electrode that can run at a high speed of 10,000-12,500 revolutions per second to prepare spherical powder. The motor rod that runs smoothly in the dynamic seal of the equipment; the preparation process of the electrode rod is: a. According to the chemical composition of the actual material requirements, the superalloy GH4169 metal is mixed to obtain the melting and casting raw material; b. The qualified melting and casting raw material is vacuum smelted , to obtain an ingot-shaped billet with a relative density of more than 85%; c, hot forging the vacuum-melted ingot-shaped billet to obtain a superalloy GH4169 metal rod with a relative density greater th...

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Abstract

The invention relates to a method for preparing high temperature alloy GH 4169 metal globule powder by utilizing a centrifugal process of an auxiliary plasma rotation electrode. Glow discharge plasma arcs are generated between the auxiliary plasma electrode and a consumption-type electrode made of cylindrical rotary high temperature alloy GH 4169 metal in a closed container under the protection of inert gases; one section of the high temperature alloy GH 4169 metal electrode near the plasma arcs is heated to form small drops of liquid via the high temperature generated by the plasma arcs; the small drops of liquid are thrown around through the centrifugal force; then the small drops of liquid of the high temperature alloy GH 4169 metal are air-cooled and solidified to form globules in the inert atmosphere of inert gases in the closed container so as to obtain high temperature alloy GH 4169 metal globules. In the method, the high temperature alloy GH 4169 metal globules with an average sphere diameter of 0.09-1.6mm and better monodispersity can be obtained. The prepared powdered metal globule has good sphericity, lower rate of abnormal particles and controllable sphere diameter. The method can be used for preparing special members of aerospace planes in the field of the laser solid shaping process.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to a method for preparing high-temperature alloy GH4169 metal pellets by using a plasma-assisted rotating electrode centrifugal process, and the prepared superalloy GH4169 metal pellets can be used for laser stereoforming and plasma coating processes , can also be applied to structural materials in the aerospace field. Background technique [0002] National Institute of Aerospace Special Materials and Technology, State Key Laboratory of Solidification Technology, laser three-dimensional molding process designed for special parts required in the fields of aviation and aerospace, requires a high temperature with small diameter, good sphericity, and good monodispersity Alloy GH4169 metal pellets are used as a functional special material. [0003] It is understood that there is no production of this kind of product in China at present, and there is a gas atomization ...

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Application Information

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IPC IPC(8): B22F9/14B23P15/00
Inventor 张建利
Owner 张建利
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