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Rhenium-free second-generation nickel-based single-crystal superalloy with high strength and resistance to high temperature oxidation and heat treatment process thereof

A high-temperature oxidation-resistant, nickel-based single crystal technology, applied in the field of nickel-based single crystal superalloys, can solve the problems of rising Re prices, tight supply, and high prices, and achieve alloy cost reduction, excellent durability, and excellent high-temperature oxidation resistance. Effect

Inactive Publication Date: 2021-04-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Re is a rare resource and is expensive. Once the Re-containing alloy is used in large quantities, the price of Re will soon rise, the supply will be tight, and the resource will be exhausted.

Method used

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  • Rhenium-free second-generation nickel-based single-crystal superalloy with high strength and resistance to high temperature oxidation and heat treatment process thereof
  • Rhenium-free second-generation nickel-based single-crystal superalloy with high strength and resistance to high temperature oxidation and heat treatment process thereof
  • Rhenium-free second-generation nickel-based single-crystal superalloy with high strength and resistance to high temperature oxidation and heat treatment process thereof

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

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Abstract

The invention discloses a rhenium-free second-generation nickel-based single-crystal superalloy with high strength and resistance to high temperature oxidation and a heat treatment process thereof, and belongs to the field of nickel-based single-crystal superalloys. The alloy comprises the following chemical components in percentage by weight: 6.0-8.0% of Cr, 8.0-10.0% of Co, 6.0-9.0% of W, 1.0-3.0% of Mo, 0-2% of Nb, 4.0-7.0% of Al, 0.5-1.5% of Ti, 1.0-5.0% of Ta, 0.02-0.06% of C, 0.001-0.003% of B, 0-0.02% of Ce, 0-0.01% of Y, 0-0.2% of Hf and the balance of Ni. The alloy has excellent low-temperature strength, medium-temperature strength, high-temperature strength and oxidation resistance and is durable, the tensile property and the low-cycle fatigue property of the alloy are equivalentto those of a second-generation single-crystal superalloy Rene N5 containing 3wt.% of Re, and the alloy reaches the complete oxidation resistance level.

Description

technical field [0001] The invention relates to the field of nickel-based single crystal superalloys, in particular to a second-generation rhenium-free high-strength high-temperature oxidation-resistant nickel-based single-crystal superalloy and its heat treatment process. Stressed parts, such as turbine blades and guide vanes of aero-engines. Background technique [0002] Nickel-based single crystal superalloys are widely used as hot-end parts of advanced aero-engines due to their excellent high-temperature mechanical properties. With the development of aero-engines, higher requirements are placed on the temperature-bearing capacity of hot-end components. Among them, the addition of Re element is the key to improve the temperature bearing capacity of the alloy. However, Re is a rare resource and is expensive. Once Re-containing alloys are used in large quantities, the price of Re will soon rise, the supply will be tight, and the resources will be exhausted. Therefore, fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10
CPCC22C19/057C22F1/10
Inventor 张少华姜祥伟王莉董加胜楼琅洪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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