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High-strength corrosion-resistant nickel-based monocrystal superalloy

A nickel-based single crystal, superalloy technology, used in the field of superalloys, to achieve high oxidation resistance, high high temperature strength, and the effect of eliminating grain boundaries

Inactive Publication Date: 2010-10-13
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

[0005] The purpose of the present invention is to provide a nickel-based single crystal superalloy with high strength and high thermal corrosion resistance, so as to solve the problem of combining the strength and thermal corrosion resistance of the alloy

Method used

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  • High-strength corrosion-resistant nickel-based monocrystal superalloy
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Examples

Experimental program
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Embodiment Construction

[0024] The following are specific embodiments of the present invention, but they do not limit the present invention.

[0025] The specific preparation method of the alloy is as follows:

[0026] First melt the master alloy of the composition in the carbon-free embodiment in a 25Kg vacuum induction furnace, pour into a master alloy ingot with a diameter of Φ83mm, then add corresponding carbon and corresponding chromium in a 5Kg vacuum induction furnace to prepare the above-mentioned composition. Alloy ingots were ground to remove scale, and cut into suitable blocks for the preparation of single crystal test rods of the composition in the table below.

[0027] The alloys in Example 1-Example 7 were prepared according to the above method, and their compositions are shown in Table 1.

[0028] Table 1: The composition (wt %) of embodiment 1-embodiment 7 and comparative example 1-comparative example 4

[0029] serial number

C

Cr

co

Mo

W

Ta

...

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Abstract

The invention relates to a novel high-temperature alloy material, in particular to a high-strength corrosion-resistant nickel-based monocrystal superalloy M09A. The superalloy comprises the following chemical compositions (by weight percent): 11.0-15.0 percent of Cr, 8.0-9.0 percent of Co, 1.8-2.2 percent of Mo, 3.5-4.4 percent of W, 5.0-6.0 percent of Ta, 4.0-5.4 percent of Al, 2.5-3.5 percent of Ti, 0.004-0.007 percent of B, 0.01-0.03 percent of C, and the balance of Ni. The alloy material of the invention has good high-temperature resistance, good hot corrosion resistance and structural stability.

Description

technical field [0001] The invention relates to high-temperature alloy technology, and in particular provides a high-strength thermal corrosion-resistant nickel-based single-crystal superalloy M09A. Background technique [0002] Corrosion-resistant superalloys are developed to meet the special needs of aviation, marine and ground gas turbines for anti-corrosion performance. Since the Cr element has good thermal corrosion resistance, it contains relatively high Cr in corrosion-resistant superalloys. Famous anti-corrosion superalloys developed abroad include ordinary polycrystalline alloys IN738 and N792, and single crystal superalloys PWA1483, etc., which have been widely used in aero-engine blade materials at home and abroad. The corrosion-resistant superalloys developed in my country include ordinary polycrystalline alloy M38, directionally solidified alloy DZ38G, and single crystal alloys DD3, DD4 and DD8. Among them, M38 and DZ38G have been applied in the marine environ...

Claims

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Application Information

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IPC IPC(8): C22C19/05
Inventor 郑启杨金侠张洪宇管恒荣孙晓峰胡壮麒
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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