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A method for in-situ synthesis of nano-oxide particle dispersion-strengthened alloys

A technology of particle dispersion strengthening and nano-oxide, which is applied in metal processing equipment, improvement of process efficiency, transportation and packaging, etc., can solve problems such as low efficiency, many processes, and difficulty in controlling grain orientation, and achieves simple methods and high process efficiency. The effect of few, simple methods

Active Publication Date: 2020-12-15
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

The process is mostly inefficient and the grain orientation is difficult to control due to the presence of oxide particles

Method used

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  • A method for in-situ synthesis of nano-oxide particle dispersion-strengthened alloys

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only for illustration, and are not intended to limit the present application.

[0029] The invention discloses a method for in-situ synthesis of a nano-oxide particle dispersion-strengthened alloy, which specifically includes the following steps:

[0030] For the convenience of description, the Fe-Ni alloy (Invar36) will be described below.

[0031] Step (1): Alloy design, so that the alloy contains elements that can form oxides.

[0032] The Invar36 designed in this example is a special low-expansion iron-nickel alloy with an ultra-low expansion coefficient. The chemical composition is (in weight%): 36wt.% Ni, 64wt.% Fe. Compared with Ni, Fe is a stronger oxide-forming element. In the present invention, by designing th...

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Abstract

The invention discloses an in-situ method for synthesizing a dispersion-strengthened alloy of nanometer oxide particles, which comprises the following steps: (1) designing the alloy so that the alloy contains elements capable of forming oxides; During the preparation process, the oxygen content in the alloy powder is increased; (3) using metal additive manufacturing technology, the oxide-forming elements and oxygen elements are combined to form dispersed nano-oxide particles during the localized solidification process of the alloy, and the obtained Nano-oxide particle dispersion strengthened alloy. This method can reduce the process and cycle of preparing nano-oxide dispersion strengthened alloys, realize in-situ precipitation of nano-oxide particles and evenly distribute them in the alloy matrix, and at the same time, can prepare columnar crystal structure in situ to ensure that in the subsequent heat treatment process No pores will be formed.

Description

technical field [0001] This application relates to the technical field of metal additive manufacturing, in particular, it relates to a brand-new in-situ method for efficiently synthesizing nano-oxide particle dispersion-strengthened alloys, which opens up a new path for the development and preparation of high-strength and high-plasticity nano-oxide particle dispersion-strengthened alloys. new way. Background technique [0002] Due to its excellent high-temperature mechanical properties, nano-oxide particle dispersion-strengthened alloys are often used in high-temperature extreme working parts of major equipment such as aviation, aerospace, and energy. At present, the main method of preparing nano-oxide dispersion-strengthened alloys is to mix the master alloy powder with nano-oxide particles, and then use the mechanical alloying method to disperse the nano-oxide particles into the master alloy powder particles, and finally pass the powder Metallurgical densification methods...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F9/10B22F9/14B22F1/00B22F3/105B33Y70/10B33Y10/00B33Y80/00C22C38/08C22C33/02
CPCC22C32/0026C22C33/0285C22C38/08B22F9/082B22F9/10B22F9/14B33Y10/00B33Y70/00B33Y80/00B22F2009/0844B22F10/00B22F1/142B22F10/34B22F10/28Y02P10/25
Inventor 邱春雷
Owner BEIHANG UNIV
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