Platinum group element reinforced high-thermal stability and high-strength nickel-based single-crystal high-temperature alloy

A high thermal stability, nickel-based single crystal technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of poor structure stability and low strength at high temperature, and achieve the effect of high thermal stability

Active Publication Date: 2017-05-10
辽宁红银金属有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor high-temperature structure stability and low strength of nickel-based single crystal superalloys in the current technology, the purpose of the present invention is to provide a high thermal stability and high strength nickel-based single crystal superalloy strengthened by platinum group elements, based on Ru, Ir The inhibitory effect of platinum group elements on the formation of TCP phase, combined with the promotion effect of Re, W, Mo, Cr and other elements on the formation of TCP phase, and the coordinated coupling effect of various elements, obtain high thermal stability and high strength nickel-based single crystal superalloy, The alloy is suitable for manufacturing hot-end high-temperature components in the fields of aviation, aerospace, energy, etc.

Method used

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  • Platinum group element reinforced high-thermal stability and high-strength nickel-based single-crystal high-temperature alloy
  • Platinum group element reinforced high-thermal stability and high-strength nickel-based single-crystal high-temperature alloy
  • Platinum group element reinforced high-thermal stability and high-strength nickel-based single-crystal high-temperature alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0057] See Table 1 for the chemical composition of the nickel-based single crystal superalloy in Examples 1-6 of the present invention.

[0058] Table 1 The chemical composition list (wt.%) of the alloy of the present invention (embodiment 1-6)

[0059] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Cr 5.5 5.5 5 5 5 3.5 co 10 10 10 10 9 9 Mo 1.5 1.5 1.5 1.5 2 2.2 W 6 6 6 6 5.5 5.6 Al 6 6 6 6 5.6 6 Ta 8.5 8.5 8.5 8.5 8.5 7 Re 5.5 5.5 5.5 5.5 6 6 Ru 2.5 2.5 3 3 4 4.5 Ir 1.5 3 1.5 3 3 3 f 0.1 0.1 0.1 0.1 0.1 0.1 Y 0.02 0.02 0.02 0.02 0.02 0.02 Ni margin margin margin margin margin margin

[0060] Performance test is carried out to alloy in above embodiment, and result is as follows:

[0061] 1. The measured density of the alloy in Example 2 is 9.1g / cm 3 .

Embodiment 5

[0063] Table 2 Example 5 alloy durability

[0064]

[0065]

Embodiment 1

[0067] Table 3 Example 1 alloy tensile properties

[0068]

[0069] 4. The as-cast state of the alloy of Example 5 of the present invention and the microstructure after heat treatment such as figure 1 and figure 2 shown.

[0070] 5. The creep deformation curve of the alloy in Example 1 at 1100°C / 180MPa is as follows image 3 , the creep deformation curve of Example 2 at 1100°C / 180MPa is as follows Figure 4 , the increase of the Ir element content increases the creep life of the alloy; the creep deformation curve of the alloy in Example 5 at 1150°C / 137MPa is as follows Figure 5 , the coordinated effect of Ir and Ru elements leads to the improvement of the high temperature creep life of the alloy.

[0071] 6. Comparison of heat intensity curves between the alloy of Example 5 of the present invention and a typical fourth-generation single crystal superalloy Figure 6 , the strength of the alloy of the present invention is significantly higher than that of typical fourt...

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Abstract

The invention discloses a platinum group element reinforced high-thermal stability and high-strength single-crystal high-temperature alloy and belongs to the technical field of nickel-based single-crystal high-temperature alloys. The alloy is prepared from the following chemical components in percentage by weight: 2 percent to 6 percent of Cr, 7 percent to 14 percent of Co, 1 percent to 3 percent of Mo, 4.5 percent to 6.5 percent of W, 4.7 percent to 6.7 percent of Al, 5 percent to 9 percent of Ta, 5.4 percent to 7 percent of Re, 2 percent to 5 percent of Ru, 1 percent to 3 percent of Ir, 0 to 0.2 percent of Hf, 0 to 0.2 percent of Y and the balance of Ni. The alloy has the advantages of high high-temprature tissue stability, excellent high-temprature strength, high anti-oxidization performance and the like and is especially suitable for manufacturing hot-end high-temperature parts in the fields of aviation, aerospace, energy sources and the like.

Description

technical field [0001] The invention relates to the technical field of nickel-based single-crystal superalloys, in particular to a nickel-based single-crystal superalloy with high thermal stability and high strength strengthened by platinum group elements. . Background technique [0002] With the development of aviation, aerospace, energy and other industrial fields, the requirements for the temperature bearing capacity of superalloys are also increasing. Cast nickel-based superalloys have experienced several development stages such as casting equiaxed crystals, oriented columnar crystals and single crystals. . Nickel-based single crystal superalloys are gradually developed with the application of directional solidification technology. Since its inception, nickel-based single crystal alloys have become the material of choice for advanced aero-engines and industrial gas turbine hot-end components due to their high temperature-bearing capacity, superior creep resistance, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10C30B29/52C30B11/00
CPCC22C19/057C22F1/10C30B11/00C30B29/52
Inventor 刘纪德周亦胄金涛刘金来孙晓峰
Owner 辽宁红银金属有限公司
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