A kind of anti-oxidation iron-based superalloy and preparation method thereof

A superalloy and iron oxide-based technology, applied in the field of anti-oxidation iron-based superalloy and its preparation, can solve problems such as unsatisfactory anti-oxidation performance, and achieve the effects of low cost, increased working temperature, and improved anti-oxidation ability

Inactive Publication Date: 2011-12-21
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The invention provides an anti-oxidation iron-based superalloy and a preparation method thereof, which solves the problem that the existing iron-based superalloy has unsatisfact

Method used

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  • A kind of anti-oxidation iron-based superalloy and preparation method thereof
  • A kind of anti-oxidation iron-based superalloy and preparation method thereof
  • A kind of anti-oxidation iron-based superalloy and preparation method thereof

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific examples.

[0017] A group of preparation method embodiments, including:

[0018] (1) Mechanical alloying step: Cr, W, Ti, Si, Y 2 o 3 And Fe powder according to mass percentage: 12%Cr, 2.5%W, 0.4%Ti, 0.5%Si, 0.3%Y 2 o 3 , the balance is Fe, mixed, and the average particle size, oxygen content and purity of the powder used are as shown in Table 1:

[0019] Table 1 Raw material powder average particle size, oxygen content and purity

[0020]

[0021]

[0022] Divide the mixed powder into 5 groups of A1~A5, and use planetary ball mill to carry out ball milling twice, the first ball milling is dry ball milling, ball milling time is 48h~60h; Water ethanol was used as a process control agent, and ball milling was continued for 2 to 4 hours, and argon protection was used during the two ball milling processes, and alloy powder with uniform composition was finally obtained; the ball mi...

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Abstract

An anti-oxidation iron-based superalloy and a preparation method thereof, which belong to superalloys and a preparation method thereof, solve the problem of unsatisfactory oxidation resistance of existing iron-based superalloys under high-temperature conditions, so as to improve serviceability and broaden high-temperature application fields. The anti-oxidation iron-based superalloy of the present invention has the composition mass percentages of: 12%≤Cr≤14%, 2%≤W≤3%, 0.3%≤Ti≤0.4%, 0.2%≤Si≤2%, 0.25%≤ Y2O3≤0.3%, the balance is Fe; it is made by mechanical alloying, molding and vacuum sintering, and the matrix of the final sintered body is α-(Fe, Cr) single-phase solid solution with uniformly distributed oxides in the matrix. The invention has high production efficiency and low cost, and the prepared anti-oxidation iron-based superalloy has reduced oxidation weight gain and improved anti-oxidation ability under the atmospheric condition of 850°C; the tensile strength at room temperature is ≥600MPa, and the elongation rate is ≥25%, which meets the requirements of automobiles. Requirements for the use of high-temperature structural parts such as engines and gas turbines, nuclear fission fuel cladding tubes, and first wall structural materials of nuclear fusion reactors.

Description

technical field [0001] The invention belongs to a superalloy and a preparation method thereof, in particular to an anti-oxidation iron-based superalloy and a preparation method thereof. Background technique [0002] Oxide Dispersion Strengthened (ODS) iron-based superalloys appeared in the 1930s. Compared with traditional solid-solution strengthened and precipitation-strengthened superalloys, the dispersed oxide sites have good thermal stability and Chemical stability can greatly improve the high temperature strength of iron-based superalloys. Fe-Cr-W-Ti-Y 2 o 3 The oxide dispersion strengthened (ODS) iron-based superalloy of the system is developed to meet the requirements of the nuclear fission reactor fuel cladding tube and the first wall material of the nuclear fusion reactor. Compared with stainless steel, it has high high temperature strength, resistance Due to the advantages of irradiation, low swelling and corrosion resistance to liquid sodium, industrially develo...

Claims

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Application Information

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IPC IPC(8): C22C38/28C22C38/34C22C33/02
Inventor 熊惟皓姚振华彭倩筠杨青青蔺绍江陈肖黄玉柱
Owner HUAZHONG UNIV OF SCI & TECH
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