A rhenium-containing high-strength hot-corrosion-resistant nickel-based single crystal superalloy

A technology of nickel-based single crystal and high-temperature alloys, which is applied in the field of nickel-based single-crystal superalloys, can solve the problem of few types of hot-corrosion-resistant single-crystal alloys, and achieve excellent hot-corrosion resistance and stable structure

Active Publication Date: 2016-04-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are few types of high-strength hot-corrosion-resistant single crystal alloys in China at present.

Method used

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  • A rhenium-containing high-strength hot-corrosion-resistant nickel-based single crystal superalloy
  • A rhenium-containing high-strength hot-corrosion-resistant nickel-based single crystal superalloy
  • A rhenium-containing high-strength hot-corrosion-resistant nickel-based single crystal superalloy

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Experimental program
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Embodiment 1-3

[0029] See Table 1 for the chemical composition of the nickel-based single crystal superalloy sample of the present invention. For convenience of comparison,

[0030] Table 1 also lists the chemical composition of the typical first-generation nickel-based single crystal superalloy PWA1483 and the typical second-generation single crystal superalloy Reńe N5.

[0031] Table 1 Alloy of the present invention (Example 1-8) and PWA1483, ReńeN5 chemical composition list (wt.%)

[0032] Alloy

[0033] Note: "Remainder" in the column of Ni content in the table means "balance".

Embodiment 4

[0035] The Larson-Miller curve comparison of Example 1 alloy of the present invention and typical first-generation nickel-based single-crystal superalloy PWA1483 and typical second-generation single-crystal superalloy Reńe N5 is shown in figure 1 . The durability performance of the alloy of the present invention is equivalent to that of Reńe N5 and higher than that of PWA1483.

Embodiment 5

[0037] The comparison between the 900°C hot corrosion performance of the alloy of Example 2 of the present invention and the hot corrosion resistant alloy M38 is shown in figure 2 .

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Abstract

The invention provides a rhenium-containing high-strength heat-corrosion-resistant nickel-base single-crystal high-temperature alloy which comprises the following constituents in percentage by mass: 8.0-12.0% of Cr, 8.0-12.0% of Co, 0.5-3.0% of Mo, 3.0-6.0% of W, 4.0-8.0% of Ta, 3.0-5.0% of Al, 3.0-5.0% of Ti, 1.0-3.0% of Re, 0-0.4% of C and the balance of Ni, wherein the total mass percentage of Al and Ti is greater than or equal to 6.5% and less than or equal to 9%, and a ratio of Al to Ti is less than or equal to 1. The alloy has excellent heat corrosion resistance, has a higher high-temperature mechanical property, has good structure stability, is applicable to high-temperature components of ground and navigational gas turbines, and is also applicable to high-temperature components of airspace and aviation engines.

Description

technical field [0001] The invention belongs to the technical field of nickel-based single-crystal high-temperature alloys, and specifically relates to a high-strength nickel-based single-crystal high-temperature alloy mainly suitable for components that bear high stress under high-temperature thermal corrosion conditions. Background technique [0002] The development of scientific and technological fields such as carrier-based aircraft and ground gas turbines in the marine environment requires engine materials to have both good mechanical properties and excellent thermal corrosion resistance. With the increase of engine and gas turbine inlet temperature, not only the alloy is required to maintain excellent hot corrosion resistance, but also higher requirements are put forward for its mechanical properties. At present, the thermal corrosion-resistant nickel-based single crystal superalloys developed in my country mainly include DD8, DD10 and DD413, etc. These alloys have goo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/00
Inventor 王栋张功张健楼琅洪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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