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Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode

A high-temperature alloy and auxiliary rotation technology, which is applied in the field of metal material preparation, can solve the problems such as the inability to meet the requirements of the laser three-dimensional forming process and the small ball diameter, and achieve the effect of smooth and clean surface of powder particles, small ball diameter and good sphericity

Inactive Publication Date: 2010-07-07
张建利
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Problems solved by technology

[0004] The present invention aims at the high-temperature alloy GH4648 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 GH4648 metal ball can meet the needs of the National Institute of Aerospace Special Materials and Technology, the State Key Laboratory of Solidification Technology, and the laser three-dimensional forming process designed for special parts required in the fields of aviation and aerospace. Good, good monodispersity superalloy GH4648 metal pellet material

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  • Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode
  • Method for preparing high-temperature alloy GH4648 prills by adopting plasma auxiliary rotary electrode

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Embodiment Construction

[0017] The method for preparing superalloy GH4648 metal pellets by using plasma-assisted rotating electrodes is implemented according to the following steps:

[0018] (1) Preparation of anode electrode rods: Refining the high-temperature alloy GH4648 metal into standard rods, and then finishing it into a plasma gun rotating electrode that can run at a high speed of 9000-12000 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 GH4648 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 GH4648 metal rod with a relative density greater than 98%;...

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Abstract

The invention relates to a method for preparing high-temperature alloy GH4648 metal spherical powder by adopting a plasma auxiliary rotary electrode centrifuging process. The method comprises the following steps of: generating a glow discharge plasma arc between a plasma auxiliary electrode and a consumption-type electrode made of rotary cylindrical high-temperature alloy GH4648 metal in a closed container protected by inert gas; forming droplets at one section of the high-temperature alloy GH4648 metal electrode close to the plasma arc by high temperature which is generated by the plasma arc; flinging the droplets out by centrifugal force; cooling the high-temperature alloy GH4648 metal droplets in air and solidifying into spheres in the inert atmosphere environment of the closed container; and collecting the high-temperature alloy GH4648 prills. The method changes process parameters so that high-temperature alloy GH4648 prills with an average sphere diameter from 0.05-1.2 mm and better monodispersity are obtained, have favorable degree of sphericity, lower malformed particle proportion and controllable sphere diameters and can be used in the field of a laser three-dimensional forming process for preparing special parts of an aerospace craft.

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 GH4648 metal pellets by using a plasma-assisted rotating electrode centrifugal process, and the prepared superalloy GH4648 metal pellets can be used for laser stereoforming and plasma coating processes . Structural materials used 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 GH4648 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 process in foreig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10
Inventor 张建利
Owner 张建利
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