Nickel-based high temperature alloy and manufacturing method thereof

A technology of nickel-based superalloys and manufacturing methods, which is applied in the field of superalloys, can solve problems such as not being able to meet the needs of scientific and technological progress, and not degrade surface properties, and achieve the effects of improving structural stability and creep resistance

Active Publication Date: 2017-05-10
宁国市华成金研科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of technology, higher and higher requirements are put forward for nickel-based superalloys. Traditional alloys and corresponding alternative alloys can no longer meet the needs of technological progress. High-temperature alloy materials that are gas-corroded and have good high-temperature mechanical strength and the ability to maintain surface properties without degradation

Method used

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  • Nickel-based high temperature alloy and manufacturing method thereof
  • Nickel-based high temperature alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a nickel-based superalloy. The alloy includes the following components in weight percentage: C0.10%, Si 0.35%, Mn 0.65%, Fe 0.22%, Co 1.8%, Al 0.25%, Ti 0.05%, Cr 22.4%, Nb 0.20%, Mo 1.5% , W 13%, Re 0.30%, B 0.005%, Ce 1.1%, Ru 1.2%, Hf 0.8%, Ta2.5%, V 0.15%, S 0.005%, P 0.007%, N 0.02%, the balance is nickel and unavoidable impurities;

[0027] The preparation method of above-mentioned alloy comprises the steps:

[0028] The first step is to select raw materials according to a certain ratio, and all raw materials should use low S and P raw materials as much as possible;

[0029] In the second step, alloy ingots conforming to the composition are formed by vacuum induction melting and casting.

[0030] In the third step, the alloy is subjected to three homogenization treatments, the temperature of the first homogenization is 1000°C, the time is 20 hours, the heating and cooling rates above 300°C are both 200°C / h, and the second homogenization...

Embodiment 2

[0036] The difference between this embodiment and Example 1 is that the content of each substance is not the same. Specifically, in this embodiment, the nickel-based superalloy includes the following components in weight percentage: C 0.15%, Si 0.55%, Mn 0.95%, Fe3.00%, Co5.0%, Al 0.50%, Ti0.09%, Cr 24.0%, Nb0.40%, Mo 3.0%, W15.0%, Re1.0%, B 0.009%, Ce 2.0%, Ru 1.8%, Hf 3.0%, Ta 5.0%, V 0.35%, the balance is nickel and unavoidable impurities.

[0037] Samples were taken from the test block and stretched at room temperature and 1000°C. At room temperature, its tensile strength Rm was 1200MPa, Rp0.2 was 1010MPa, and the elongation rate was 31%. At 1000°C, its tensile strength Rm1115MPa, Rp0. 2 The range is 988MPa, the elongation range is 29%, and the duration of the 1000°C, 500MPa endurance test is 98h.

Embodiment 3

[0039] The difference between this example and Example 1 is that the content of each substance is not the same. Specifically, in this example, the nickel-based superalloy includes the following components in weight percentage: C 0.08%, Si 0.30%, Mn 0.45%, Fe 0.10%, Co 1.5%, Al 0.10%, Ti 0.03%, Cr 20.5%, Nb 0.05%, Mo 1.0%, W 12.5%, Re 0.15%, B 0.003%, Ce 0.9% , Ru 0.9%, Hf 0.5%, Ta 2.2%, V 0.08%, the balance is nickel and unavoidable impurities.

[0040]Samples were taken from the test block and stretched at room temperature and 1000°C. At room temperature, its tensile strength Rm was 1189MPa, Rp0.2 was 1001MPa, and the elongation rate was 31%. At 1000°C, its tensile strength Rm1112MPa, Rp0. 2 The range is 987MPa, the range of elongation is 29%, and the endurance time of 1000℃, 500MPa endurance test is 99h.

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Abstract

The invention discloses a nickel-based high temperature alloy and a manufacturing method thereof. The nickel-based high temperature alloy comprises the following components in percentage by weight: 0.06-0.15% of C, 0.25-0.55% of Si, 0.40-0.95% of Mn, 0.05-3.00% of Fe, 1.0-5.0% of Co, 0.05-0.50% of Al, 0.01-0.09% of Ti, 20.0-24.0% of Cr, 0.01-0.40% of Nb, 0.90-3.0% of Mo, 12.0-15.0% of W, 0.10-1.0% of Re, 0.001-0.009% of B, 0.8-2.0% of Ce, 0.8-1.8% of Ru, 0.3-3.0% of Hf, 2.0-5.0% of Ta, 0.05-0.35% of V and the balance of nickel and inevitable impurities. The nickel-based high temperature alloy disclosed by the invention has the advantages that materials are prepared in a certain proportion, homogenization treatment is carried out on the alloy for three times, high temperature forging is carried out on the alloy, and solution treatment, heat preservation and cooling are carried out; and by adopting the technical scheme of the invention, the strength, fatigue resistance and corrosion resistance of the alloy at high temperature can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloys, and in particular relates to a nickel-based high-temperature alloy. Background technique [0002] Nickel-based superalloys are superalloys with nickel as the matrix (generally more than 50%) in the range of 650-1000 °C with high strength and good oxidation resistance and gas corrosion resistance. Nickel-based alloys have excellent comprehensive properties at medium and high temperatures, and are suitable for working at high temperatures for a long time. They are mainly used for structural components that work at 950°C to 1050°C in the aerospace field, such as turbine blades, guide vanes, and turbine blades of aeroengines. Disk and combustion chamber etc. [0003] Chinese patent 201210305881.9 discloses a nickel-based superalloy, which consists of the following components in weight percentage: Cr 22.5-24.5%, Co 7.0-8.0%, W 6.5-7.5%, Mo 3.0-4.0%, Al 1.2-1.8%, Ti 1.5-2.5%, Nb 2.0-3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10
CPCC22C19/055C22C19/056C22F1/10
Inventor 程国华
Owner 宁国市华成金研科技有限公司
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