A kind of preparation technology of intake valve for internal combustion engine

Abstract

The invention discloses a gas inlet valve for an internal combustion engine. The gas inlet valve is characterized by comprising a gas valve head and a gas valve rod, wherein the gas valve head is welded with the gas valve rod; the gas valve head is prepared from the following components in percentage by weight: 0.5 to 0.7 percent of chromium, 0.2 to 0.5 percent of molybdenum, 0.35 to 0.5 percent of carbon, 0.3 to 0.45 percent of silicon, 0.1 to 0.4 percent of nickel, 0.05 to 0.15 percent of manganese, 0.2 to 0.6 percent of niobium, 0.1 to 0.2 percent of aluminum and the balance of iron; the gas valve rod is prepared from the following components in percentage by weight: 0.5 to 0.7 percent of chromium, 0.2 to 0.5 percent of molybdenum, 0.35 to 0.5 percent of carbon, 0.3 to 0.45 percent of silicon, 0.1 to 0.4 percent of nickel and the balance of iron. Strong carbide is added into the gas valve head disclosed by the invention to form an element niobium, so that the high-temperature strength of the components is improved, and the service life of the gas valve head is prolonged.

Description

Technical field [0001] The invention relates to the technical field of internal combustion engine accessories, in particular to a preparation process of an intake valve for an internal combustion engine. Background technique [0002] The function of the valve is specifically responsible for inputting air into the engine and exhausting the exhaust gas after combustion. From the engine structure, it is divided into intake valve and exhaust valve. The function of the intake valve is to suck air into the engine and mix and burn with fuel; the function of the exhaust valve is to discharge the burned exhaust gas and dissipate heat. [0003] The valve is composed of a valve head and a stem. The temperature of the valve head is very high, and it also bears the pressure of the gas, the force of the valve spring and the inertial force of the transmission component. Its lubrication and cooling conditions are poor, and the valve must have certain strength, rigidity, heat resistance and wear ...

AI Technical Summary

Problems solved by technology

[0004] Due to the heat received by the valve during the working process, about 75% is dissipated through the contact between the cone surface of the valve head and the seat ring, and it is subjected to thermal corrosion, thermal fatigue and thermal wear during the working process, so a higher high temperature is required Strength and wear resistance, while the existing valves for internal combustion engines are easy to wear, and the worn valves cause valve leakage, resulting in low cylinder pressure inside the internal combustion engine, which manifests as insufficient power and affects use

[0005] In view of the wear-prone defects of the above-mentioned existing intake valves, the inventor actively researches and innovates on the basis of years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperates with the application of academic theories, in order to create a kind of Intake valve for internal combustion engine and its preparation process to make it more practical

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