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Heat-resistant alloy resisting to sulfur corrosion and rod production method thereof

A technology of heat-resistant alloy and production method, which is applied in the field of metal materials, can solve the problems of low service life and low corrosion resistance, and achieve the effects of increased fluidity, strong high-temperature sulfur corrosion resistance, and high-strength performance

Inactive Publication Date: 2016-02-03
广东华鳌合金新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when they are used at high temperature (950℃~1050℃), especially in the environment containing sulfur (S), due to their low corrosion resistance, their service life is relatively low.

Method used

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  • Heat-resistant alloy resisting to sulfur corrosion and rod production method thereof
  • Heat-resistant alloy resisting to sulfur corrosion and rod production method thereof
  • Heat-resistant alloy resisting to sulfur corrosion and rod production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, the raw materials are melted in a non-vacuum intermediate frequency induction furnace. Under normal pressure, the melting temperature in the induction furnace is controlled at 1560 ° C. The mass percentage of molten steel obtained by melting is: C: 0.038%, Si: 1.41%, Mn: 1.13%, Cr: 24.32%, Ni: 19.92%, Nb: 1.23%, Mo: 0.38%, V: 0.08%, P: 0.032%, S: 0.025%, and the balance is Fe and unavoidable impurities.

[0039]Then the obtained molten steel is drawn into a Φ100mm master alloy rod through a horizontal continuous casting machine. Then put the finished master alloy rod into a non-vacuum intermediate frequency induction furnace for remelting. Under normal pressure conditions, control the melting temperature in the induction furnace at 1560 ° C, and add Al, Ce and La elements to the molten steel at the same time. Alloying, the mass percentage composition of the obtained remelted molten steel is: C: 0.038%, Si: 1.41%, Mn: 1.13%, Cr: 24.32%, Ni: 19.92%, Nb: 1.23%, Mo: ...

Embodiment 2

[0042] First, the raw materials are melted in a non-vacuum intermediate frequency induction furnace. Under normal pressure, the melting temperature in the induction furnace is controlled at 1600 ° C. The mass percentage of molten steel obtained by melting is: C: 0.017%, Si: 1.83%, Mn: 1.42%, Cr: 25.87%, Ni: 21.35%, Nb: 1.47%, Mo: 0.41%, V: 0.32%, P: 0.028%, S: 0.025%, and the balance is Fe and unavoidable impurities.

[0043] Then the obtained molten steel is drawn into a Φ100mm master alloy rod through a horizontal continuous casting machine. Then put the finished master alloy rod into a non-vacuum intermediate frequency induction furnace for remelting. Under normal pressure conditions, control the melting temperature in the induction furnace at 1600 ° C, and add Al, Ce and La elements to the molten steel at the same time. Alloying, the mass percentage composition of the obtained remelted molten steel is: C: 0.017%, Si: 1.83%, Mn: 1.42%, Cr: 25.87%, Ni: 21.35%, Nb: 1.47%, Mo:...

Embodiment 3

[0046] First, the raw materials are melted in a non-vacuum intermediate frequency induction furnace. Under normal pressure conditions, the melting temperature in the induction furnace is controlled at 1580 ° C. The mass percentage of molten steel obtained by melting is: C: 0.21%, Si: 2.12%, Mn: 2.01%, Cr: 24.92%, Ni: 22.03%, Nb: 1.62%, Mo: 0.42%, V: 0.54%, P: 0.030%, S: 0.020%, and the balance is Fe and unavoidable impurities.

[0047] Then the obtained molten steel is drawn into a Φ100mm master alloy rod through a horizontal continuous casting machine. Then put the finished master alloy rod into a non-vacuum intermediate frequency induction furnace for remelting. Under normal pressure conditions, control the melting temperature in the induction furnace at 1580°C, and add Al, Ce and La elements into the molten steel at the same time. Alloying, the mass percentage composition of the obtained remelted molten steel is: C: 0.21%, Si: 2.12%, Mn: 2.01%, Cr: 24.92%, Ni: 22.03%, Nb: 1...

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Abstract

The invention discloses a heat-resistant alloy resisting sulfur corrosion. The heat-resistant alloy is prepared from the following components in percentage by weight: 0.025-0.25 percent of C, 1.30-2.50 percent of Si, 1.00-2.50 percent of Mn, 20-30 percent of Cr, 17-27 percent of Ni, 0.75-2.50 percent of Nb, 0.6-1.50 percent of Mo, 1.0-2.5 percent of Al, 0.6-1.5 percent of V, 0.001-0.050 percent of Ce+La, at most 0.035 percent of P, at most 0.030 percent of S and the rest being Fe. The invention further discloses a rod production method of the heat-resistant alloy resisting sulfur corrosion. According to the heat-resistant alloy and the rod production method, the alloy rod has relativley high strength and good high-temperature sulfur corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a heat-resistant alloy resistant to sulfur corrosion and a production method for a bar thereof. Background technique [0002] Commercial heat-resistant alloys, such as German 1.4848 (GX40CrNiSi25-20) and American ASTMA351 (HK40), mainly contain about 25wt% Cr and 20wt% Ni, and they have certain strength. However, when they are used at high temperatures (950°C to 1050°C), especially in environments containing sulfur (S), their service life is relatively low due to their low corrosion resistance. Therefore, there is an urgent need for a heat-resistant alloy that can resist sulfur corrosion when used at high temperatures, so that its service strength and sulfur corrosion resistance are superior to existing commercial alloy materials, so as to solve the problem of existing commercial Ni-Cr heat-resistant alloys. related performance deficiencies. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C1/02
Inventor 王雁和龚凤阶全会峰王玮徐国民
Owner 广东华鳌合金新材料有限公司
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