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K4169 high-temperature alloy

A high-temperature alloy and impurity technology, applied in the field of high-temperature alloy casting, can solve the problems of increasing alloy manufacturing costs, reducing alloy mechanical properties, and expensive rare earth elements

Active Publication Date: 2014-07-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent number is ZL200610025394, which is modified by adding elements such as Ca / Sr / mixed rare earth on the basis of AZ91D alloy to improve the fluidity of the alloy, but the price of rare earth elements is expensive, which greatly increases the manufacturing cost of the alloy
[0006] The literature "Guo Jianting mentioned in the first volume of superalloy materials published by Science Press in 2008 that carbon can improve the fluidity of superalloys, but the percentage of carbon in cast superalloys is about 0.05. If the carbon content is increased will reduce the mechanical properties of the alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example is a formula that can improve the fluidity of K4169 superalloy, and its components are shown in Table 1:

[0020] Table 1

[0021] C(％) Ni(%) Cr(％) Mo(%) Al(％) Ti(%) B(％) 0.056 52.54 19.15 3.11 0.61 0.94 0.0059 Zr(％) Nb(%) Ta(%) Si(%) Mn(%) S(％) P(％) 0.042 5.03 0.05 0.043 0.0035 0.0018 0.0015 Impurities (%) Fe(%) ≤0.01 margin

[0022] The percentages are all percentages by mass.

Embodiment 2

[0024] This example is a formula that can improve the fluidity of K4169 superalloy, and its components are shown in Table 2:

[0025] Table 2

[0026] C(％) Ni(%) Cr(％) Mo(%) Al(％) Ti(%) B(％) 0.056 52.54 19.15 3.11 0.61 0.94 0.0059 Zr(％) Nb(%) Ta(%) Si(%) Mn(%) S(％) P(％) 0.049 5.03 0.05 0.043 0.0035 0.0018 0.0015 Impurities (%) Fe(%) ≤0.01 margin

[0027] The percentages are all percentages by mass.

Embodiment 3

[0029] This example is a formula that can improve the fluidity of the K4169 superalloy, and its components are shown in Table 3:

[0030] table 3

[0031] C(％) Ni(%) Cr(％) Mo(%) Al(％) Ti(%) B(％) 0.056 52.54 19.15 3.11 0.61 0.94 0.0059 Zr(％) Nb(%) Ta(%) Si(%) Mn(%) S(％) P(％) 0.035 5.03 0.05 0.043 0.0035 0.0018 0.0015 Impurities (%) Fe(%) ≤0.01 margin

[0032] The percentages are all percentages by mass.

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Abstract

The invention discloses a K4169 high-temperature alloy, which comprises the following components in percentage by mass: 0.056% of C, 52.54% of Ni, 19.15% of Cr, 3.11% of Mo, 0.61% of Al, 0.94% of Ti, 0.0048-0.0070% of B, 0.035-0.049% of Zr, 5.03% of Nb, 0.05% of Ta, 0.043% of Si, 0.0035% of Mn, 0.0018% of S, 0.0015% of P, not more than 0.01% of impurities, and the balance of Fe. The mobility of the K4169 high-temperature alloy can be improved by simultaneously changing the contents of boron and zirconium.

Description

technical field [0001] The invention relates to the field of superalloy casting, in particular to improving the fluidity of K4169 superalloy by simultaneously changing the contents of boron and zirconium elements. Background technique [0002] In recent years, with the establishment of large-scale transport aircraft and large passenger aircraft projects in my country, there has been an urgent demand for large-scale complex thin-wall superalloy castings in China. For example, the diameter of turbofan 15, turbofan 20 and commercial engine casings under research are all above 1.2m, and the thickness of large-area thin walls is only 1.8-2mm. Due to the lack of technology accumulation, my country has encountered great difficulties in the manufacture of these complex superalloy castings, and there is a gap of 20 to 30 years with foreign countries. In addition to the problem of excessive size tolerance, the traditional melting and casting process has great challenges in solving th...

Claims

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Application Information

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IPC IPC(8): C22C19/05
Inventor 张军介子奇黄太文刘林周伟傅恒志
Owner NORTHWESTERN POLYTECHNICAL UNIV
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