A low-cost, high-strength, hot-corrosion-resistant nickel-based superalloy and its preparation process and application
A nickel-based superalloy and a preparation process technology, applied in the field of nickel-based superalloys, can solve the problem that the temperature bearing capacity is difficult to meet the design requirements of G/H-class heavy-duty gas turbines, so as to ensure the stability of the structure, ensure the thermal corrosion resistance, and improve the The effect of high temperature strength
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[0046] The 850 ℃ long-term structural stability of embodiment alloy (No.6 and No.2), as figure 2 shown. No.6 Alloy (N v =2.53) After aging for 1000h, a small amount of σ phase was precipitated (see figure 2 (a)); No.2 alloy (N v =2.45) After aging for 1000h, no TCP phase was precipitated (see figure 2 (b)). It can be seen that in order to ensure the structural stability of the alloy, it is necessary to limit the N of the alloy of the present invention. v The value is less than 2.45.
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