Full Analysis of Core Characteristics and Industrial Application Technology of K465 Cast High Temperature Alloy

Basic characteristics
K465 is a nickel based precipitation hardening casting high-temperature alloy, with a maximum operating temperature of 1050 ℃. This alloy has excellent high-temperature stability, high strength, and resistance to thermal corrosion, and can adapt to complex gas working environments. Its casting process has good performance and can cast thin-walled precision components with complex shapes.
In terms of physical properties, K465 alloy has a density of 8.34g/cm ³, a thermal conductivity of 38W/(m · K) at 500 ℃, and a thermal expansion coefficient of 12.5 × 10 ⁻⁶/℃ in the range of 20-600 ℃. These parameters endow the alloy with reliable structural stability in high-temperature service environments.
Main components and functions
The core chemical composition and mass proportion range of K465 alloy are as follows: carbon 0.13% -0.20%, chromium 8.0% -9.5%, cobalt 9% -10.5%, tungsten 9.5% -11%, molybdenum 1.2% -2.4%, aluminum 5.1% -6.0%, titanium 2.0% -2.9%; Trace elements include niobium 0.8% -1.2%, zirconium ≤ 0.04%, and boron ≤ 0.035%.
At the same time, strict control is implemented on the impurity content of alloys, requiring iron ≤ 1.0%, sulfur ≤ 0.01%, phosphorus ≤ 0.015%, and lead and bismuth both ≤ 0.0005%.
The functions of each component are clear: nickel serves as the matrix element to ensure high temperature stability; Tungsten effectively strengthens the strength of alloys; Chromium enhances antioxidant capacity; Aluminum and titanium synergistically form precipitation strengthening phases; Cobalt improves the fatigue resistance of alloys.
Core performance parameters
At room temperature, the tensile strength of K465 alloy is not less than 1060 MPa, the yield strength is not less than 880 MPa, the elongation is in the range of 6.5% -9%, and the hardness range is 42-45 HRC.
The high-temperature mechanical performance is particularly outstanding: under stress conditions of 900 ℃ and 200MPa, the durability life exceeds 200 hours; The creep limit at 1050 ℃ shall not be less than 85MPa; The oxidation rate at 1100 ℃ is less than 0.1g/(m ² · h).
Through the standard heat treatment process of holding at 1210 ℃± 10 ℃ for 4 hours, the optimization and control of alloy structure can be achieved, further improving the comprehensive service performance.
Typical application scenarios
The application of K465 alloy focuses on the high-temperature key component field of high-end equipment. In the aerospace field, it can be used to manufacture turbine guide vanes for aircraft engines with a working temperature of 1050 ℃, as well as turbine working blades for working conditions below 1000 ℃; In the field of energy and power, it is suitable for core components such as moving blades and couplings of gas turbines.
In the petrochemical industry, this alloy, with its resistance to sulfide corrosion, can be used to process equipment components such as cracking furnace tubes and reforming reactors; It can also be applied to heat exchanger shells in nuclear energy equipment, as well as heat-resistant components such as high-temperature molds and conveyor rollers in the glass manufacturing industry.