A method for surface nitriding of fiber-reinforced ternary layered ceramic parts
A ternary layered and ceramic parts technology, applied in the field of nitriding, can solve the problems of high brittleness, poor impact resistance, high modulus, etc., and achieve improved corrosion resistance and wear resistance, good machinability, and temperature resistance good effect
Active Publication Date: 2022-04-01
HARBIN DONGAN ENGINE GRP
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Problems solved by technology
With the continuous improvement of aero-engine performance, the ambient operating temperature of steel parts is also increasing, and the original steel gears, bearings and other parts can no longer meet the use requirements
[0003] Si 3 N 4 , ZrO 2 Ceramic materials such as SiAlON and SiAlON exhibit good mechanical properties in high-temperature environments, which can meet the requirements of service in high-temperature environments. The manufacture of such ceramic parts cannot meet the actual engineering requirements for high reliability of aero-engine transmission system parts due to their high modulus and poor impact resistance
Method used
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Experimental program
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Effect test
Embodiment
[0036] The working environment of the gear used on an aircraft can reach up to 450°C. The processing method includes the following steps:
[0037] 1. Sintered Ti 3 AlC 2 Bulk ceramic material prepared into Ti after ball milling 3 AlC 2 For ceramic powder, take the powder above 100 mesh for use;
[0038] 2. Add SiC short fibers with a length of 1 to 5 mm in the volume fraction ratio of 5:95 to the powder;
[0039] 3. Ti 3 AlC 2 After the material powder and fiber are mixed, sintering is carried out at a temperature of 1200°C, a sintering pressure of 30 MPa, and a sintering time of 2 hours to form a blank;
[0040] 4. Process the blank into parts;
[0041] 5. Carry out surface nitriding to parts, and described nitriding method comprises the following steps:
[0042] a. Place the part on the cathode of the titanium alloy ion nitriding furnace, vacuumize the nitriding furnace to below 30Pa, and start nitriding;
[0043] b. During the nitriding process, the heating rate of...
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Abstract
The invention relates to a method for nitriding a fiber-reinforced ternary layered ceramic part. The fiber-reinforced ternary layered ceramic composite material is obtained by introducing a fiber-reinforced phase into the MAX phase ternary layered ceramic material and sintering. , The thickness of the effective nitrided layer after nitriding can reach 0.05-0.25mm. Parts manufactured by the invention, such as gears and bearings, can be used to manufacture parts serving in high temperature environments above 450°C, and have the advantages of good processing technology and impact resistance.
Description
technical field [0001] The invention relates to a nitriding method, in particular to a nitriding method of fiber-reinforced ternary layered ceramic parts. Background technique [0002] The parts of the aero-engine transmission system are mostly made of steel, limited by the properties of the material, the maximum service temperature is about 430°C. With the continuous improvement of the performance of aero-engines, the environmental operating temperature of steel parts is also increasing, and the original steel gears, bearings and other parts can no longer meet the use requirements. [0003] Si 3 N 4 , ZrO 2 Ceramic materials such as SiAlON and SiAlON exhibit good mechanical properties in high-temperature environments, which can meet the requirements of service in high-temperature environments. Manufactured such ceramic parts, due to their high modulus and extremely poor impact resistance, cannot meet the actual engineering requirements for high reliability of aero-engin...
Claims
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IPC IPC(8): C04B35/80C04B35/56C04B35/645
CPCC04B35/5618C04B35/645C04B2235/6567C04B2235/6565C04B2235/6562C04B2235/46C04B2235/96
Inventor 孙振淋辛玉武段小明刘慧许建武徐奉鑫吴彦芬曲延龙王忠明齐智超
Owner HARBIN DONGAN ENGINE GRP