摘要
本文针对某天然气输气站控排闸阀阀芯腐蚀和磨损失效现状,通过激光熔覆技术开展了熔覆层的金相组织、硬度、磨损和腐蚀性能的工艺参数优化。结果表明:优化的激光功率为1900W、扫描速率为500mm/min和送粉速率为40g/min,金相组织和硬度发生了明显变化,磨损后熔覆层表面形成了较细浅的犁沟,优化熔覆层呈现了更优越的电化学耐蚀性能、钝化性能以及抗点蚀性能,这为注输气站控排闸阀阀芯的冲刷腐蚀导致失效提供了有效防护技术。
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.
作者
胡恒进
贾海平
葛丽莎
王大为
李萌瑶
尹志福
HU Heng-jin;JIA Hai-ping;GE Li-sha;WANG Da-wei;LI Meng-yao;YIN Zhi-fu(Shaanxi Gas Group Co.,Ltd.Xi’an 710016,China;Shaanxi Engineering Research Center of Gas Storage,Transportation and Comprehensive Utilization,Xi’an 710016,China;Shaanxi Gas Fuping Energy Technology Co.,Ltd.Weinan 711700,China;Shaanxi Key Laboratory of Surface Engineering and Remanufacturing,Xi’an 710065,China)
出处
《全面腐蚀控制》
2024年第7期1-6,83,共7页
Total Corrosion Control
关键词
阀芯
激光熔覆
摩擦磨损
微观形貌
极化曲线
valve core
laser cladding
friction and wear
microstructure
polarization curve
