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Low-carbon multi-element high-resistance electrothermal alloy and preparation method thereof

An electrothermal alloy, high-resistance technology, applied in the field of alloy materials, can solve the problems of urgent need to improve strength and oxidation resistance, shorten service life, limit the scope of use, etc., so as to improve high-temperature mechanical properties and oxidation resistance, improve alloy strength, The effect of improving the morphology of inclusions

Inactive Publication Date: 2014-04-16
北京中钢控股集团有限公司
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Problems solved by technology

It not only limits the scope of use, but also seriously shortens the service life
The existing iron-chromium-aluminum alloys have high carbon content and single alloying elements. After being used at high temperature, M 23 C 6 The precipitation is inevitable, especially when the alloy is used at high temperature for a long time, the grains grow very thick, the number of grain boundaries is relatively reduced, and the entire grain boundary is covered with network M 23 C 6 , the degree of brittleness is more severe
In addition, the strength and oxidation resistance of existing alloys need to be improved urgently

Method used

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  • Low-carbon multi-element high-resistance electrothermal alloy and preparation method thereof

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Embodiment Construction

[0010] The present invention is further illustrated and understood by the following examples.

[0011] The element ratios of Examples 1-3 are shown in Table 1.

[0012] The element ratio (wt%) of table 1 embodiment 1-3

[0013]

[0014] The finished alloy products of Examples 1-3 were prepared according to the following methods: (1) Ingredients: ingredients were made according to the composition in Table 1; (2) Smelting: the above-mentioned raw materials were put into a magnetic levitation vacuum induction melting furnace, and the vacuum was evacuated to 1×10 -3 Pa, filled with high-purity argon to 1×10 4 Pa, smelted at 2900 ℃ and then cooled into alloy ingots with the furnace; (3) Homogenization annealing: put the alloy ingots into the vacuum heat treatment furnace, and the vacuum degree is 1×10 -3 Pa. The temperature is 1100°C for 36 hours and then cooled with the furnace; (4) Isothermal forging: The homogenized and annealed samples are processed into cylindrical ingots...

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Abstract

The invention relates to an alloy material and in particular discloses a low-carbon multi-element high-resistance electrothermal alloy and a preparation method thereof. The low-carbon multi-element high-resistance electrothermal alloy comprises C, Si, Mn, Al, Cr, Co, Hf, Zr, Nb, Ti, Tb, Dy, B and Fe. The preparation method comprises the following steps: batching, smelting, performing homogenizing annealing, performing isothermal forging, performing hot rolling on wire rods, performing stress relief annealing, bleaching and performing multi-pass drawing. The prepared finished material has high toughness, high tensile strength and high oxidation resistance, overcomes the defects in the prior art and has high industrial application prospects.

Description

Technical field: [0001] The invention relates to an alloy material, in particular to a low-carbon 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, 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. Currently used electrothermal alloys are mainly divided into two categories: Fe-Cr-Al alloys with ferritic structure and Ni-Cr alloys with austenitic structure. Fe-Cr-Al alloys have a series of advantages over Ni-Cr alloys, such as high allowable use temperature. , high resistivity, easy to hot and cold processing, etc., but it has a fatal weakness, strong brittleness, especially afte...

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 北京中钢控股集团有限公司
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