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Method for synthesizing nano oxide particle dispersion strengthened alloy in in-situ mode

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 the problems of difficult control of grain orientation, low efficiency, and many processes, and achieves simple and efficient process. Less, the effect of improving high temperature creep performance

Active Publication Date: 2019-01-11
BEIHANG UNIV
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  • Application Information

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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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  • Method for synthesizing nano oxide particle dispersion strengthened alloy in in-situ mode

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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 a method for synthesizing nano oxide particle dispersion strengthened alloy in an in-situ mode. The method comprises the following steps that (1) alloy is designed to enable the alloy to contain elements capable of forming oxides; (2) alloy powder is prepared, wherein in the preparation process of the alloy powder, the oxygen content in the alloy powder is increased; and (3) a metal additive manufacturing technology is utilized, so that the oxide forming elements and the oxygen element are combined to form dispersed nano oxide particles in the localized solidification process of the alloy so as to obtain the nano oxide particle dispersion strengthened alloy. According to the method, the process and the period for preparing the nano oxide dispersion strengthened alloy can be reduced and shortened, the nano oxide particles are separated out in situ and are uniformly distributed in an alloy matrix, and meanwhile, a columnar crystal organizational structure can be prepared in situ, so that the formation of pores in the subsequent heat treatment process is guaranteed to be avoided.

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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IPC IPC(8): B22F9/08B22F9/10B22F9/14B22F1/00B22F3/105B33Y70/00B33Y10/00B33Y80/00C22C38/08C22C33/02
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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