Valve seat ring and manufacturing method thereof

Abstract

The invention discloses a valve seat ring and a manufacturing method thereof. The valve seat ring is made from a powder metal material which is specifically composed of graphite, superfine silica powder, natural manganese sand, electrolytic nickel powder, chromium-molybdenum alloy powder, superfine high-purity cobalt powder, zinc stearate and high-quality water atomized pure iron powder. According to the valve seat ring and the manufacturing method thereof, a special metal material ratio is adopted, the valve seat ring is manufactured through the powder metallurgy method, and the obtained valve seat ring has the advantages of being high in density and hardness, excellent in heat resistance and thermal shock resistance, good in machining property and air tightness, low in abrasion, capable of being matched with a valve well and the like and is more suitable for engines consuming unleaded gasoline and alternative fuel.

Description

technical field [0001] The invention relates to the field of valve seat processing, in particular to a valve seat and a manufacturing method thereof. Background technique [0002] In recent years, engineering engines have developed towards high power, low energy consumption, and long life. These new changes in the engine have also put forward new requirements for its key components. The sealing device of the engine combustion chamber, with the continuous development of automobile engine technology, the working condition of the valve seat of the automobile engine is more severe, coupled with the popularity of unleaded gasoline and alternative fuels, due to the lack of lead lubrication between the valve and the valve seat, The commonly used high-chromium casting alloys are often unable to meet their normal work due to premature wear, resulting in valve leakage, which in turn causes engine vibration, poor cold start and other failure phenomena. Therefore, it is necessary to dev...

AI Technical Summary

Problems solved by technology

[0002] In recent years, engineering engines have developed towards high power, low energy consumption, and long life. These new changes in the engine have also put forward new requirements for its key components. The sealing device of the engine combustion chamber, with the continuous development of automobile engine technology, the working condition of the valve seat of the automobile engine is more severe, coupled with the popularity of unleaded gasoline and alternative fuels, due to the lack of lead lubrication between the valve and the valve seat, The commonly used high-chromium casting alloys are often unable to meet their normal work due to premature wear, resulting in valve leakage, which in turn causes engine vibration, poor cold start and other failure phenomena. Therefore, it is necessary to develop high-strength valve seat rings to meet the requirements of new fuel engines. use