Research on Corrosion and Wear Resistant of Cladding Process of Valve Core of Control Gate Valve in Gas Transmission Station
In this paper,aiming at the current situation of corrosion and wear failure of the valve core of the control and discharge valve of a natural gas transmission station,the process parameters were optimized by laser cladding technology through metallographic structure,hardness,wear and corrosion performance.The results showed that the optimized laser power was 1900 W,the scanning rate was 500 mm/min and the powder feeding rate was 40 g/min.The metallographic structure and hardness changed obviously.After wear,a fine and shallow furrow was formed on the surface of the cladding layer.The optimized cladding layer exhibited superior electrochemical corrosion resistance,passivation performance and pitting corrosion resistance,which provided an effective protection technology for the erosion corrosion of the valve core of the control gate valve in the gas injection station.
valve corelaser claddingfriction and wearmicrostructurepolarization curve
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