Equiaxed Grain Turbine Blades are turbine blades manufactured by the equiaxed grain casting process. This process produces blades with a uniform grain structure that can maintain good performance in high temperature and high stress environments.
Material Features: Stellite is a cobalt-based high-temperature alloy with excellent wear and corrosion resistance.
Equiaxed crystal casting suitability: Stellite material is suitable for equiaxed crystal casting process, which can manufacture wear-resistant and corrosion-resistant turbine parts. However, due to its high hardness and brittleness, the casting process requires precise temperature and cooling control.
Material Features: Titanium alloy has excellent strength-to-weight ratio, corrosion resistance and high-temperature performance.
Equiaxed crystal casting suitability: Titanium alloy is suitable for equiaxed crystal casting process, which can manufacture high-strength and lightweight turbine parts. However, the high reactivity of titanium alloy requires casting under inert atmosphere or vacuum conditions to prevent oxidation and contamination.
Material Features: Inconel alloy has excellent high-temperature strength, corrosion resistance and creep resistance.
Equiaxed crystal casting suitability: Inconel alloy is suitable for equiaxed crystal casting process, which can manufacture turbine parts with excellent performance in high-temperature environment. Equiaxed crystal casting can improve the density and mechanical properties of the material.
Material features: Hastelloy alloy has excellent corrosion resistance and high temperature strength, suitable for extreme environments.
Applicability of equiaxed crystal casting: Hastelloy alloy is suitable for equiaxed crystal casting process, which can manufacture turbine accessories with excellent performance in corrosive and high temperature environments. Process control requirements are high to ensure material performance.
Material features: Nimonic alloy has excellent high temperature strength and creep resistance, and is widely used in aircraft engines.
Applicability of equiaxed crystal casting: Nimonic alloy is suitable for equiaxed crystal casting process, which can manufacture turbine accessories with excellent performance in high temperature environments. Equiaxed crystal casting can improve the density and mechanical properties of the material.
Material features: Monel alloy has excellent corrosion resistance and mechanical properties, suitable for marine and chemical environments.
Applicability of equiaxed crystal casting: Monel alloy is suitable for equiaxed crystal casting process, which can manufacture turbine accessories with excellent performance in corrosive environments. Process control requirements are high to ensure material performance.
Aircraft engine turbine blades:
High-pressure turbine blades: located in the high-temperature and high-pressure turbine section of the jet engine, used to extract energy from the gas flow to drive the compressor and generator.
Low-pressure turbine blades: located in the low-pressure turbine section of the jet engine, used to further extract energy from the gas flow to propel the aircraft.
Gas turbine blades:
High-pressure gas turbine blades: used to extract energy from the gas flow to drive the compressor and generator, suitable for industrial gas turbines and power plants.
Low-pressure gas turbine blades: usually located in the low-pressure section of the gas turbine, used to further extract the kinetic energy of the gas to drive the shaft.
Automobile turbocharger blades:
Compressor blades: located in the compressor section of the turbocharger, used to compress the intake air to increase the engine intake volume and efficiency.
Turbine blades: located in the turbine section of the turbocharger, using gas power to drive the compressor.
Industrial turbine blades:
Industrial gas turbine blades: used in the high-temperature and high-pressure turbine section of industrial gas turbines, providing power to drive the compressor or generator.
Industrial steam turbine blades: The high-temperature and high-pressure section of an industrial steam turbine that is used to extract energy from the steam flow to drive a generator or mechanical equipment.
They usually face extremely high temperatures during operation. For example, turbine blades of gas turbines may have to withstand temperatures exceeding 1000℃ or even higher.
They are in a high-pressure gas or fluid environment.
They will be subjected to greater mechanical stress due to rotation and airflow.
They are constantly impacted by high-speed flowing gas.
High-Pressure Turbine Blades: Operating temperatures can reach 1200°C to 1400°C (2192°F to 2552°F).Use nickel-based high-temperature alloys and ceramic matrix composites (CMC) to withstand extreme temperatures.
Low-Pressure Turbine Blades: Operating temperatures are slightly lower than high-pressure turbine blades, generally in the range of 900°C to 1100°C (1652°F to 2012°F).
High-Pressure Section Blades:Operating temperature range is typically 540°C to 600°C (1004°F to 1112°F).Made of high-temperature alloy steel or nickel-based alloys to withstand high temperature and high pressure steam.
Intermediate and Low-Pressure Section Blades:Operating temperatures are between 300°C and 500°C (572°F to 932°F).Material selection is more diverse, including stainless steel and low alloy steel.
High-pressure turbine blades:Modern jet engine high-pressure turbine blades can operate at temperatures exceeding 1500°C (2732°F).Advanced single-crystal nickel-based high-temperature alloys and ceramic-based composites are used.
Low-pressure turbine blades:The operating temperature is lower, generally in the range of 800°C to 1100°C (1472°F to 2012°F).
There are a wide variety of coating technologies for turbine blades, each with its specific function and application environment. Choosing the right coating technology can significantly improve the performance and life of turbine blades in high temperature, high pressure and corrosive environments. Different process technologies (such as diffusion coating, spraying, electroplating, etc.) can realize the application of these coatings and meet the use requirements of turbine blades in various extreme environments. The following is an introduction to the various types of layers:
Features: Provides excellent anti-oxidation and anti-corrosion properties by forming a nickel-aluminum alloy coating on the surface of the turbine blades.
Application: Widely used in turbine blades in high temperature and high pressure environments, especially in aerospace engines and gas turbines.
Process: Diffusion coating technology, usually through heat treatment to diffuse the coating material into the blade surface.
Features: Provides good anti-oxidation and anti-corrosion properties, especially suitable for silicon-containing corrosive environments.
Application: For high temperature components in gas turbines and aerospace engines.
Process: Aluminum and silicon are diffused onto the blade surface through heat treatment to form a stable protective layer.
Features: Enhance the blade’s anti-oxidation and high-temperature corrosion resistance, and the coating formed of chromium and aluminum has excellent high-temperature stability.
Application: Mainly used for turbine blades in high temperature and high corrosion environments, such as gas turbines and aerospace engines.
Process: Diffusion coating technology, which diffuses chromium and aluminum onto the blade surface through heat treatment.
Features: The coating formed by cobalt and aluminum has good anti-oxidation and anti-corrosion properties at high temperatures.
Application: Suitable for high temperature components of gas turbines and aerospace engines.
Process: Cobalt and aluminum are diffused onto the blade surface through heat treatment to form a protective coating.
Features: Platinum enhances the anti-oxidation and anti-corrosion properties of the coating, especially in high temperature environments.
Application: Widely used in turbine blades in high-temperature, high-corrosion environments, especially aerospace engines.
Process: Diffusion coating technology, which diffuses platinum and aluminum onto the blade surface through heat treatment.
Features: The coating formed by titanium and aluminum has good anti-oxidation and anti-corrosion properties, especially suitable for high temperature environments.
Application: For high temperature components in gas turbines and aerospace engines.
Process: Titanium and aluminum are diffused onto the blade surface through heat treatment.
Features: Salt bath electroplating technology is used to deposit platinum on the blade surface, providing excellent anti-oxidation and anti-corrosion properties.
Application: Mainly used for turbine blades in high temperature and high corrosion environments.
Process: electroplating technology, platinum is evenly deposited on the blade surface through a salt bath.
Features: Provides good corrosion resistance and lubricity, suitable for compressor components.
Application: Compressor blades in aircraft engines and gas turbines.
Process: Chemical coating technology, treating the blade surface with phosphate solution.
Features: MCrAlY coating (an alloy of nickel, cobalt, chromium, aluminum and yttrium) has excellent anti-oxidation and high-temperature corrosion resistance.
Application: Widely used in turbine blades of aircraft engines and gas turbines.
Process: Plasma spraying or high temperature diffusion coating technology.
Features: Protect areas that do not need coating during the coating process and prevent coating material contamination.
Application: Suitable for coating process of turbine blades with complex structures.
Process: Use special masking materials or tools to cover areas not to be coated.
Features: Remove the old coating for re-coating without damaging the blade base material.
Application: For use in turbine blade maintenance and remanufacturing processes.
Process: Chemical or mechanical methods to remove old coatings.
Features: By depositing ceramic materials on the blade surface, it reduces the temperature of the substrate and provides thermal protection.
Application: Widely used in high-temperature turbine blades, especially aerospace engines and gas turbines.
Process: Plasma spraying or electron beam physical vapor deposition (EB-PVD).
Features: An aluminide coating is formed on the blade surface through chemical vapor deposition to provide anti-oxidation and anti-corrosion protection.
Application: Turbine blades for high temperature environments.
Process: Chemical vapor deposition (CVD) technology.
Features: Chromium and aluminum combine to form a coating that provides resistance to oxidation and corrosion.
Application: Mainly used for turbine blades in high temperature and high corrosion environments.
Process: chemical or physical vapor deposition technology
High strength and durability
Excellent fatigue performance
Complex shape manufacturing capability
Material diversity