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Iron-aluminum-serial multielement high-resistance electrothermal alloy and preparation method thereof

An electrothermal alloy and high resistance technology, which is applied in the field of iron-aluminum multi-component high-resistance electrothermal alloy and its preparation, to achieve the effects of increasing alloy strength, improving alloy phase composition and microstructure, improving high temperature resistance, oxidation resistance and resistivity

Inactive Publication Date: 2014-10-08
YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The resistivity and high temperature oxidation resistance of the above alloys are better than nickel-chromium alloys and iron-chromium-aluminum alloys, but there is still room for further improvement in their performance

Method used

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Embodiment Construction

[0017] Further illustrate and understand the present invention through embodiment below.

[0018] Prepare the finished alloy of the embodiment according to the following method: (1) Batching: batching according to the following composition: C: 0.13%, Si: 0.76%, Mn: 0.3%, Al: 20.2%, Cr: 1.4%, Co: 0.9% , Hf: 1.6%, Nb: 2.8%, Ti: 2.6%, Ce: 0.5%, Dy: 0.4%, B: 0.015%, S: 0.0003%, P: 0.0005%, the balance is iron and unavoidable impurities ; (2) Melting: put the above raw materials into the magnetic levitation vacuum induction melting furnace, and vacuumize to 1×10 -3 pa, filled with high-purity argon to 1×10 4 pa, melted at 2850°C and cooled with the furnace to form an alloy ingot; (3) Homogenization annealing: put the alloy ingot into a vacuum heat treatment furnace, -3 Pa, keep warm at 1050°C for 24 hours and then cool with the furnace; (4) Isothermal forging: Process the homogenized annealed sample into a cylindrical ingot by wire cutting, and perform isothermal forging on a fou...

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Abstract

The invention relates to an electrothermal alloy material and particularly relates to an iron-aluminum-serial multielement high-resistance electrothermal alloy and a preparation method thereof. The iron-aluminum-serial multielement high-resistance electrothermal alloy comprises the following elements: C, Si, Mn, Al, Cr, Co, Hf, Nb, Ti, Ce, Dy, B, Fe and the like. The preparation method comprises the following steps: material proportioning; smelting; homogenizing annealing; isothermally forging; hot-rolling of a steel wire rod; multi-pass drawing; intermediate annealing and the like. The material product prepared by the method provided by the invention has excellent high-temperature oxidation resistance, resistivity and service life, overcomes the deficiencies in the prior art and has a good industrial application prospect.

Description

Technical field: [0001] The invention relates to an electrothermal alloy material, in particular to an iron-aluminum series multi-element high-resistance electrothermal alloy and a preparation method thereof. Background technique: [0002] Electrothermal alloy materials are resistance alloys that use the resistance properties of substances to manufacture heating elements. At present, the electrothermal alloy material has become an important engineering alloy material, which is suitable for machinery, metallurgy, electronics, chemical industry and other industries, and occupies an important position in the national economy. The electric heating element used in industry below 1300 ℃ mainly adopts nickel-chromium alloy and iron-chromium-aluminum alloy. Nickel-chromium alloys are expensive, and when the temperature is greater than 1000 ° C, the oxidation resistance is significantly reduced. Iron-chromium-aluminum alloys have high carbon content and single alloying elements. Wh...

Claims

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Application Information

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IPC IPC(8): C22C38/32C21D8/06
Inventor 郭健郭小芳郭乃林
Owner YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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