High-strength gamma'-phase-strengthened cobalt-based high-temperature alloy
A high-temperature alloy, high-strength technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problem of reducing the oxidation resistance of alloys, and achieve excellent high-temperature oxidation resistance and thermal corrosion performance, high-temperature strength, and high-temperature The effect of excellent corrosion resistance
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Embodiment 1
[0034] In Table 1, the yield strength of alloy 1 is higher, which is determined by figure 2 It can be seen that the yield strength of alloy 1 is about 2.5 times that of the traditional cobalt-based directionally solidified superalloy DZ40M. Not only that, Alloy 1 has good high temperature oxidation resistance and hot corrosion resistance. Table 2 shows the average oxidation rate of alloys 1-3 and DZ40M at 900°C and according to the standard name "Test Method for Determination of Oxidation Resistance of Steel and Superalloys" (standard number HB5258-2000, implementation date January 1, 2001) Evaluation of the oxidation resistance of alloys; Table 3 shows the average hot corrosion weight gain of alloys 1-3 at 800 and 900 °C. It can be seen from Table 2 and Table 3 that compared with DZ40M, the average oxidation weight gain and average hot corrosion weight gain of Example alloy 1 are significantly smaller than those of the comparative alloy, showing excellent oxidation resistan...
Embodiment 2
[0041] In Table 1, the yield strength of alloy 2 is higher, which is determined by figure 2 It can be seen that the high temperature yield strength of alloy 2 is about 2.5-3 times that of the traditional cobalt-based directionally solidified superalloy DZ40M. Not only that, but it can be seen from Table 2 and Table 3 that compared with DZ40M, the average oxidation weight gain and average hot corrosion weight gain of Example alloy 2 are significantly smaller than those of the comparative alloy, showing excellent oxidation resistance and hot corrosion resistance.
Embodiment 3
[0043] In Table 1, the yield strength of alloy 3 is higher, which is determined by figure 2 It can be seen that the high temperature yield strength of alloy 3 is about 2.5-3 times that of the traditional cobalt-based directionally solidified superalloy DZ40M. Moreover, it can be seen from Table 2 and Table 3 that compared with DZ40M, the average oxidation weight gain and average hot corrosion weight gain of Example alloy 3 are significantly smaller than those of the comparative example alloy, showing excellent oxidation resistance and hot corrosion resistance. In addition, Example Alloy 3 has good durability properties. Under the condition of temperature of 900°C and test stress of 160MPa, the durability life of Example alloy 3 is as high as 184.117h, while that of DZ40M is 85h. The alloys of the present invention exhibit excellent high temperature durability properties. (DZ40M data comes from "China Superalloy Handbook")
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