Boron nitride powder composite doped stainless steel piston ring for engine and preparation method thereof

Abstract

The invention discloses a boron nitride powder compound-doped stainless steel piston ring for an engine and a preparation method thereof. The h-BN and c-BN nanometer powders are mixed; the surface of the stainless steel is plated with boron nitride composite powder by a vacuum coating method; The coated boron nitride composite powder and stainless steel powder are mixed; the mixed powder is added to the additive manufacturing equipment, and the three-dimensional drawing of the piston ring is input into the printer and printed; after printing, the piston ring is taken out and placed in the arc nitriding furnace Medium-arc nitriding treatment; obtain boron nitride powder composite doped stainless steel piston ring; the advantage is to use h-BN with excellent self-lubricating properties to modify the self-lubricating properties of stainless steel, and use high-hardness c-BN to improve the self-lubricating properties of stainless steel Hardness, improve wear resistance; use coating method to modify boron nitride powder, reduce interface defects between stainless steel powder and boron nitride powder; use additive manufacturing technology to improve manufacturing yield.

Description

technical field [0001] The invention relates to the technical field of stainless steel piston rings for engines, in particular to boron nitride powder composite doped stainless steel piston rings for engines and a preparation method thereof. Background technique [0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. [0003] Piston rings are widely used in various engines, such as steam engines, diesel engines, gasoline engines, compressors, hydraulic machines, etc., and are widely used in automobiles, trains, ships, yachts, etc. The piston ring is the core component inside the fuel engine, and it completes the sealing of the fuel gas together with the cylinder, piston, and cylinder wall. Generally, the piston ring is installed in the ri...

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Problems solved by technology

[0010] The invention modifies the material of the piston ring itself, obtains materials that cannot be obtained by conventional metallurgical methods through the additive manufacturing technology, and provides boron nitride powder composite doped stainless steel piston rings for engines and a preparation method thereof, so that the piston ring matrix can be obtained from The material itself solves the problems of self-lubrication and wear resistance

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