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Anti-hydrogen material and preparation method thereof

A technology for hydrogen materials and raw materials, applied in the field of hydrogen-resistant materials and their preparation, can solve the problems of high inclusion content, high hydrogen content, poor room temperature performance, etc., and achieves a wide source of raw materials, low production cost, and good thermal processing performance. Effect

Active Publication Date: 2022-03-04
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention adopts the smelting method of electric furnace + AOD furnace + LF furnace + VD furnace + protective atmosphere electroslag remelting, and formulates a corresponding matching preparation process, which solves the problem of high hydrogen content in the material matrix and reduces the The oxygen content in the medium solves the problem of high inclusion content and poor room temperature performance

Method used

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  • Anti-hydrogen material and preparation method thereof
  • Anti-hydrogen material and preparation method thereof
  • Anti-hydrogen material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The chemical element composition of the anti-hydrogen material is shown in Table 1, and its preparation method follows the following steps:

[0039] (1) Smelting: Use electric furnace + AOD furnace + LF furnace + VD furnace to smelt the required element raw materials. The casting temperature during smelting is 1480 ° C, and the dissolved hydrogen content in the molten steel is controlled to be 18ppm; when the Ca content in the molten steel is low at 5×10 -12 In ppm, Mg is added to the molten steel so that the Mg content in the molten steel reaches 8×10 -6 ~1×10 -5 Between ppm;

[0040] (2) LF furnace is used for refining deoxidation, and VD furnace is used for vacuum dehydrogenation to reduce the hydrogen content in molten steel to below 3ppm;

[0041] (3) Electroslag: The electrode rod of step (1) is carried out electroslag remelting, and the composition of described electroslag is counted as: CaF 2 :Al 2 o 3 :CaO:SiO 2 :MgO=52:16:20:9:3, using protective atmosp...

Embodiment 2

[0045] The chemical element composition of the anti-hydrogen material is shown in Table 1, and its preparation method follows the following steps:

[0046] (1) Smelting: Use electric furnace + AOD furnace + LF furnace + VD furnace to smelt the required element raw materials. The casting temperature during smelting is 1500 ° C, and the dissolved hydrogen content in the molten steel is controlled to be 8ppm; when the Ca content in the molten steel is low at 5×10 -12 In ppm, Mg is added to the molten steel so that the Mg content in the molten steel reaches 8×10 -6 ~6×10 -5 Between ppm;

[0047] (2) AOD furnace is used for oxygen blowing decarburization, and VD furnace is used for vacuum dehydrogenation to reduce the hydrogen content in molten steel to below 3ppm;

[0048] (3) electroslag: add electroslag to the molten steel of step (1) and carry out smelting, and the composition of described electroslag is counted as: CaF 2 :Al 2 o 3 :CaO:SiO 2 :MgO=52:16:20:9:3, using non...

Embodiment 3

[0052] The chemical element composition of the anti-hydrogen material is shown in Table 1, and its preparation method follows the following steps:

[0053] (1) Smelting: Use electric furnace + AOD furnace + LF furnace + VD furnace to smelt the required elemental raw materials. The casting temperature during smelting is 1520°C, and the dissolved hydrogen content in the molten steel is controlled to be 10-12ppm;

[0054] (2) AOD furnace is used for oxygen blowing decarburization, and VD furnace is used for vacuum dehydrogenation to reduce the hydrogen content in molten steel to below 3ppm;

[0055] (3) electroslag: add electroslag to the molten steel of step (1) and carry out smelting, and the composition of described electroslag is counted as: CaF 2 :Al 2 o 3 :CaO:SiO 2 :MgO=52:16:20:9:3, using protective atmosphere electroslag (inert gas is introduced into the electroslag process to form a protective atmosphere above the slag pool, isolate the air, and prevent the hydrogen ...

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Abstract

The invention provides an anti-hydrogen material and a preparation method thereof, and the preparation method comprises the following steps: (1) controlling the content of dissolved hydrogen in molten steel to be 8-20 ppm during smelting, and when the content of Ca is lower than 5 * 10 <-12 > ppm, adding Mg into the molten steel until the content reaches 5 * 10 <-6 >-7 * 10 <-5 > ppm; (2) reducing the hydrogen content in the molten steel to 3 ppm or below by adopting an AOD furnace and a VD furnace; (3) carrying out secondary remelting by adopting electroslag; (4) the electroslag ingot is forged, the initial forging temperature ranges from 1140 DEG C to 1250 DEG C, the final forging temperature ranges from 900 DEG C to 1050 DEG C, and the forging heating rate ranges from 80 DEG C / h to 100 DEG C / h; and (5) hot rolling is conducted after cogging, the heating temperature during hot rolling ranges from 1120 DEG C to 1250 DEG C, the initial rolling temperature ranges from 1080 DEG C to 1180 DEG C, and the final rolling temperature ranges from 900 DEG C to 1050 DEG C. The obtained material is excellent in hydrogen resistance, low in hydrogen content and oxygen content, low in inclusion content and excellent in room temperature performance.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, and in particular relates to a hydrogen-resistant material and a preparation method thereof. Background technique [0002] Hydrogen energy is a secondary energy source. It is produced by using other energy sources in a certain way, rather than being directly exploited like coal, oil, natural gas and other energy sources. Therefore, the reserves of non-renewable resources such as fossil energy are decreasing day by day. Under such circumstances, the development of hydrogen energy is of great significance. Hydrogen energy is recognized as a clean energy source and is emerging as a low-carbon and zero-carbon energy source. In the 21st century, my country, the United States, Japan, Canada, and the European Union have all formulated hydrogen energy development plans, and my country has made many progresses in the field of hydrogen energy, and is expected to become one of the leadin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/58C22B9/18C21C7/10C21C7/06C21C7/068
CPCC22C33/04C22C38/02C22C38/58C22C38/001C22B9/18C21C7/10C21C7/06C21C7/068
Inventor 肖磊李亚非蒲治军刘波黄志永吴勇军朱小阳何梦华
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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