Turbojet Machinery Engine Parts Jet Engine Turbine Wheel

•  the production process

The manufacture of turbine impellers usually involves the following complex and sophisticated processes:

1. Material selection: Alloy materials with high temperature resistance, high strength and high corrosion resistance, such as nickel-based superalloy, are usually selected. These materials are able to withstand extreme working conditions, such as the impact of high temperature gas and corrosion.For example, Inconel 718 alloy is commonly used in the manufacture of turbine impellers due to its excellent high-temperature strength and oxidation resistance.
2. Casting: Precision casting techniques, such as investment casting or vacuum casting, are used to obtain complex shapes and good internal structures.In the process of investment casting, the wax mold is made first, and then coated with refractory material around it. After high temperature baking, the wax mold is melted out, and finally the metal liquid is poured into the cavity to form.
3. Machining: THE impeller after casting is precisely processed by CNC machining center to achieve the size and shape accuracy required by the design.Including the blade of the milling impeller, the outer circle and the inner hole of the wheel, etc.
4. Heat treatment: Heat treatment is performed to improve the properties of materials, such as increased strength, toughness, and fatigue resistance.The common heat treatment methods are solution treatment and aging treatment.
5. Surface treatment: Coating technology, such as thermal barrier coating (TBC), is used to improve the high temperature resistance and corrosion resistance of the impeller.Thermal barrier coatings are usually composed of ceramic materials, such as zirconia.2 Particularity

• Extreme working environment: Turbine impellers are in the harsh environment of high temperature, high pressure and high speed rotation in jet engines.The temperature can be up to thousands of degrees Celsius, the pressure is huge, and the speed is extremely high, which requires the impeller material to have extremely high heat resistance, strength and toughness.

1. Complex geometry: Impeller blades have complex shapes that require precise design and manufacturing to ensure efficient airflow flow and energy conversion.Parameters such as the curvature, thickness and Angle of the blade are carefully calculated and optimized.
2. High precision requirements: Any small size deviation or surface defect may affect the performance and reliability of the impeller, and even lead to engine failure.The impeller dynamic balance accuracy is required to ensure that no excessive vibration will be generated during high-speed rotation.
3. Material performance requirements are demanding: high strength, high toughness, good heat resistance and corrosion resistance are required.Microstructure and composition control of materials are critical to meet these performance requirements.
4. Strict testing: the manufacturing process needs to go through a variety of non-destructive testing methods, such as X-ray testing, ultrasonic testing, etc., to ensure that there is no defect inside the impeller

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