Material features: Inconel alloy has excellent high temperature strength, corrosion resistance and creep resistance.
Single crystal casting applicability: Inconel alloy can be applied to single crystal casting process, especially alloys specially designed for single crystal casting such as Inconel 738 and Inconel 792. These alloys have excellent performance in high temperature environment and are suitable for manufacturing high temperature turbine blades.
Material features: Nimonic alloy has excellent high temperature strength and creep resistance and is widely used in aero engines.
Single crystal casting applicability: Nimonic alloy can be applied to single crystal casting process, especially alloys specially designed for single crystal casting such as Nimonic 105 and Nimonic 263. These alloys have excellent performance in high temperature environment and are suitable for manufacturing high temperature turbine blades.
Single crystal materials
Material features: Single crystal materials have a grain boundary-free structure, eliminating the weaknesses at the grain boundaries, and have excellent high temperature strength and creep resistance.
Single crystal casting applicability: Single crystal materials are specially designed for single crystal casting process and are widely used in manufacturing high temperature turbine blades. These materials are usually nickel-based high temperature alloys such as CMSX-4, PWA 1484 and Rene N5.
Single crystal turbine blades are widely used in equipment requiring high temperature and high stress environments, such as:
Aero-engine: In aero-engines, single-crystal turbine blades are used in the high-pressure turbine area, where temperatures are extremely high and the performance requirements for materials are extremely stringent.
Gas turbine: In gas turbines used in power plants, single crystal blades can significantly improve the efficiency and reliability of the gas turbine.
Industrial turbines: In some high-temperature industrial processes, single-crystal turbine blades are also used to improve the performance and service life of the equipment.
Improved engine efficiency: Monocrystalline turbine blades can operate at higher temperatures, thereby increasing the thermal efficiency of the engine.
Extended service life: Due to its excellent high-temperature strength and fatigue resistance, single-crystal blades have a longer service life than traditional blades.
Reduced maintenance costs: Longer service life and greater reliability mean longer service intervals and lower maintenance costs.
First, place the seed crystal with the same material as the single crystal component to be cast at the bottom of the mold shell, then pour the superheated molten metal on the seed crystal to melt the seed crystal part, and then properly control the temperature gradient in the liquid at the solid-liquid interface and the growth rate of the crystal. The molten metal will start to grow from the unmelted seed crystal part into the molten metal, and finally form a single crystal with the same crystal orientation as the seed crystal.
Crystal selection method is the most basic process method for the preparation of single crystal high-temperature alloy blades.
Grain boundary-free structure: Single crystal turbine blades have no grain boundaries in the entire blade material, which means that under high temperature and high stress conditions, phenomena such as grain boundary sliding and grain boundary diffusion will not occur, thereby improving the creep resistance and high temperature strength of the material.
Excellent high temperature performance: Single crystal materials can maintain their mechanical properties under high temperature environments, so they are very suitable for high temperature operating environments such as aircraft engines and gas turbines.
Fatigue resistance: Since single crystal turbine blades have no grain boundaries, this reduces the source of fatigue cracks and improves the fatigue life of the blades.
such as cracks, wear, corrosion, etc. on the blades, and the degree of damage exceeds the repairable range.
For example, the efficiency of the blades is reduced, the power output is reduced, etc., which affects the overall performance of the turbine.
Excessive vibration may indicate that the blades are unbalanced or have other structural problems.
Blade materials may age after long-term use, affecting their performance and life.
High strength and durability
Excellent fatigue performance
Complex shape manufacturing capability
Material diversity