Forming method for nanometer beta' phase element and nanometer oxide composite reinforced Fe-based ODS alloy

A nano-oxide, iron-based technology, applied in the field of metal dispersion strengthening, can solve the problems of high-temperature mechanical properties, uneven distribution of oxide particles, uncontrollable interface structure, etc., which limit the strengthening effect of oxides. The effect of shortening ball milling time and reducing energy consumption
CN103233182AInactive Publication Date: 2013-08-07UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2013-08-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a forming method for nanometer beta' phase element and nanometer oxide composite reinforced Fe-based ODS alloy, and belongs to the field of metal dispersion reinforcement technology. A matrix element powder (Fe, Cr, Mo) and a beta' phase forming element powder (Ni, Al) and an oxide are formed into a component (Fe2O3, YH2 and Ti), and are pre-mixed uniformly, and then a high energy ball milling is carried out in Ar atmosphere with high purity, and a nanometer oxide dispersion phase is formed in situ by mechanical chemical reaction, thereby the nucleation energy barrier is reduced, and the oxide is nucleated uniformly. And then alloy powder after high energy ball milling is processed by SPS sintering or hot isostatic pressing densification. After solid solution and ageing heat treatment, the nanometer beta' phase element and the nanometer oxide composite reinforced Fe-based ODS alloy are obtained. According to the invention, two reinforced phases such as nanometer beta' phase and nanometer oxide are simultaneously introduced into the Fe-based ODS alloy, and the reinforced effects of the two nanometer precipitated phases are superposed, and the two precipitated phases has the advantages of very fine particle sizes, uniform distribution, high heat stability and substantial reinforcement effect, thereby further enlarging the usage temperature limit of the Fe-based ODS alloy.
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Description

technical field

[0001] The invention belongs to the technical field of metal dispersion strengthening, and in particular provides a method for preparing an iron-based ODS (Oxide Dispersion Strengthening) alloy strengthened by composite nanometer intermetallic compound (β? phase) and nanometer oxide by adopting a mechanical alloying process. Background technique

[0002] Iron-based ODS alloys have excellent high-temperature creep properties, high-temperature oxidation and corrosion resistance, and excellent radiation resistance. It is not only a candidate material for the first wall cladding tube, cladding and other high-temperature structural parts of the fourth-generation nuclear fusion reactor, but also in the thermal protection structure and engine hot-end parts of aerospace aircraft, and high-temperature parts of advanced gas turbines, etc. All fields have important application prospects.

[0003] Nanoprecipitation strengthening is one of the most promising strengthenin...

Claims

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