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Third nickel-base high-temperature single crystal alloy in low cost

A high-temperature alloy, low-cost technology, applied in the field of low-cost third-generation nickel-based single-crystal superalloy, can solve the problems of high density, high cost, and easy precipitation of TCP, and achieve excellent durability, low cost, and excellent heat resistance The effect of corrosion performance

Active Publication Date: 2007-05-23
辽宁红银金属有限公司
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Problems solved by technology

However, the addition of a large number of Re elements has brought the following disadvantages while improving performance: high cost, high density, and easy precipitation of TCP.

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below by way of examples.

[0028] The present invention uses a vacuum induction furnace for melting, and first casts a master alloy with a chemical composition that meets the requirements, and then grows into a single crystal component. Before use, it must undergo heat treatment in the following process system: 1300°C / 8h, A.C. (air cooling to room temperature)+ 1305°C / 15h, A.C. (air cooling to room temperature)+1310°C / 8h, A.C. (air cooling to room temperature)+1315°C / 24h, A.C. (air cooling to room temperature)+1180°C / 4h, A.C. (air cooling to room temperature)+870°C / 24h, A.C. (air cooled to room temperature).

[0029] According to the range of chemical composition, single crystal samples of the alloy of the present invention were prepared. The specific chemical composition is shown in Table 1. For the convenience of comparison, the chemical composition of CMSX-12C in the CMSX-10 series is also listed in Table 1....

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Abstract

The invention belong to the field of nickel-based monocrystal superalloy, specifically a kind of low-cost third generation nickel-based monocrystal superalloy, which is mainly used for producing units bearing high stress under high temperature such as impeller blade in aero-motor. The chemical components of the alloy are (wt.%): Cr 2-4%,Co 11-13%,W 5-7%,Mo 0.5-2%,Re 3- 5%,Al 5-7%,Ta 6-10%,Hf 0.05-0.2%,and Ni as balance. The invention adopts vacuum induction melting for smelting, first smelting mother alloy with chemical components meeting the requirement, growing to monocrystal units. The following technological system for heating treatment is carried out before using: 1300DEG C / 8h,A.C.+1305DEG C / 15h,A.C.+1310DEG C / 8h, A.C.+1315DEG C / 24h,A.C.+1180DEG C / 4h,A.C.+870DEG C / 24h,A.C.. The alloy of the invention has the advantages of excellent persistence correspondent to that of third generation monocrystal superalloy CMSX-10, little Re content, low cost and good causticity resistance.

Description

technical field [0001] The invention belongs to the field of nickel-based single-crystal high-temperature alloys, in particular to a low-cost third-generation nickel-based single-crystal high-temperature alloy, which is mainly suitable for components subjected to high stress at high temperatures, such as turbine blades of aeroengines. Background technique [0002] In the process of the development of single crystal superalloys, due to the higher and higher requirements on the use temperature, the content of refractory elements such as W, Mo, Ta, Re in the alloy gradually increases, especially the Re element plays an important strengthening role in the alloy. , adding 3wt.% Re can increase the service temperature of the alloy by about 30°C. The total content of refractory elements in the typical first-generation single crystal superalloy CMSX-2, second-generation single crystal superalloy CMSX-4 and third-generation single crystal superalloy CMSX-10 is 14.6wt.%, 16.1wt. .% a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10
Inventor 金涛王文珍赵乃仁王志辉刘金来侯桂臣孙晓峰管恒荣胡壮麒
Owner 辽宁红银金属有限公司
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