A novel tungsten-molybdenum-chromium-vanadium turbocharger sealing ring and its preparation method

Abstract

A novel tungsten, molybdenum and chrome alum turbocharger sealing ring comprises the following chemical components, by weight, 0.8-0.9% of C, 0.15-0.40% of Mn, 0.20-0.45% of Si, 3.80-4.40% of Cr, 1.75-2.20% of V, 5.50-6.75% of W, 4.50-5.50% of Mo, less than or equal to 0.030% of P, less than or equal to 0.030% of S, less than or equal to 0.25% of Cu, less than or equal to 0.30% of Ni and the balance of Fe. A method for manufacturing the novel tungsten, molybdenum and chrome alum turbocharger sealing ring includes: warming, hardening and tempering, drilling, salt bathing, quenching, tempering, hardness adjusting, cutting and polishing the hardened materials for molding, heating through a tool, cooling in the air, hardening again, sizing, slicing and forming finished products. The sealing ring is durable, wear-resisting, high in strength, long in service life and particularly suitable for being used as a turbocharger sealing ring of a combustion engine.

Description

technical field [0001] The invention relates to a preparation technology of a sealing ring, in particular to a preparation method of a novel tungsten-molybdenum-chromium-vanadium turbocharger sealing ring which can be used for a sealing ring of a turbocharger of an internal combustion engine. Background technique [0002] The sealing ring is one of the important parts of the turbocharger. Because it works in high temperature and engine exhaust for a long time, and needs to work continuously at high speed, it is easy to lose its elasticity and lose its sealing effect after being corroded or excessively worn, resulting in oil leakage from the turbocharger. , air leakage makes the supercharger work unstable, which directly affects the working performance of the internal combustion engine. The material of the sealing ring directly affects its performance, because the working environment requires that the material must be heat-resistant, wear-resistant and corrosion-resistant, an...

AI Technical Summary

Problems solved by technology

Among them, chromium stainless steel has low cost, but poor heat resistance, wear resistance and thermal stability, and generally can only be used for the compressor end of a turbocharger with a low speed, and its working life is short

Chromium-molybdenum sealing ring has better wear resistance and thermal stability, but poor toughness and is easy to break. It is generally used in turbochargers of ordinary diesel engines, and the working temperature does not exceed 400 degrees.

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