Nickel base single crystal high-temperature alloy series Nideal2 alloy series and application thereof
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A high-temperature alloy and nickel-based single crystal technology, applied in the field of high-temperature alloys, can solve problems such as difficult deformation of alloys, and achieve the effect of high temperature bearing capacity
Inactive Publication Date: 2018-04-13
DALIAN UNIV OF TECH
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However, with the improvement of high temperature performance, the deformation of the alloy becomes difficult
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[0014] The following examples will further illustrate the present invention.
[0015] This example describes the evolution process from the second generation CMSX-4 to the third generation CMSX-10K of the nickel-based single crystal alloy.
[0016] ① CMSX-4 is a second-generation single crystal alloy with a durable life of 139 hours at 1100°C / 137MPa (KyokoKawagishi, Superalloys 2012, TMS 2012). The standard composition of its grade is Ni-9.6Co-3.0Re-6.4Cr-0.6Mo-6.4W-5.6Al-6.5Ta-1Ti-0.1Hf in mass percent, and converted into atomic percent.
[0017] ② Classify the main alloying elements and compare them with the Nideal 2 alloy series components. Ni-like element Ni in CMSX-4 alloy 0.86 co 0.12 Re 0.01 , forming γ′ precipitated phase element Al, other forming γ′ precipitated phase element Ti 0.37 Ta 0.63 , and form the γ-matrix element Cr 0.76 Mo 0.04 W 0.20 The total atomic percentages are: 74.0, 12.6, 3.4, 9.9. It can be seen that there is still a certain composition d...
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Abstract
The invention discloses a nickel base single crystal high-temperature alloy series Nideal2 alloy series and application thereof, and belongs to the technical field of high-temperature alloys. The alloy series comprises main alloy components of a similar Ni element, an element forming a gamma' precipitated phase, an element forming a gamma basal body, and an Al element; and the similar Ni element is selected from one or several of Ni, Co, Re, Ru, Ir, Fe, Pt, Pd, Os, Rh and Tc, and is 80+-1.5 at.%. The element forming the gamma' precipitated phase is selected from one or several of Ti, V, Nb, Ta, Zr and Hf, and is 3.3+-0.1 at.%. The element forming the gamma basal body is selected from one or several of Cr, Mo and W, and is 3.3+-0.1 at.%. The atomic percentage sum of the Al element is 13.3+-0.2 at.%; the alloy components need to be met synchronously; and after components of main alloys are determined, Mg, Si, C, B and one or several of La, Ce and Y rare earth are selected within 0.5 at.%. The alloy series constructed by an ideal ratio is called as the Nideal2 alloy series; and the alloy series achieves high temperature bearing capacity and long service life.
Description
technical field [0001] The invention relates to a nickel-based single-crystal high-temperature alloy series Nideal 2 alloy series and an application thereof, belonging to the technical field of high-temperature alloys. Background technique [0002] Nickel-based superalloy mainly refers to a high-temperature structural material based on nickel, which can work for a long time above 600°C and under certain stress conditions. Nickel-based superalloys have high temperature bearing capacity, long lasting life, good oxidation resistance and corrosion resistance, and good fatigue performance and fracture toughness. With the development of industry, nickel-based superalloys have shown good application prospects in many fields, especially in high-temperature components such as turbine blades, guide vanes and turbine disks of aero-engines and gas turbines. [0003] Nickel-based superalloy is a typical alloy in superalloys. According to the preparation process, superalloys can be divi...
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