输气站控排闸阀阀芯耐蚀耐磨熔覆工艺研究
Research on Corrosion and Wear Resistant of Cladding Process of Valve Core of Control Gate Valve in Gas Transmission Station
胡恒进 1贾海平 2葛丽莎 2王大为 1李萌瑶 2尹志福3
作者信息
- 1. 陕西燃气集团有限公司,陕西西安 710016;陕西燃气储运及综合利用工程研究中心,陕西西安 710016
- 2. 陕西燃气储运及综合利用工程研究中心,陕西西安 710016;陕西燃气集团富平能源科技有限公司,陕西渭南 711700
- 3. 陕西省表面工程与再制造重点实验室,陕西西安 710065
- 折叠
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.
Abstract
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.
关键词
阀芯/激光熔覆/摩擦磨损/微观形貌/极化曲线Key words
valve core/laser cladding/friction and wear/microstructure/polarization curve引用本文复制引用
出版年
2024
NETL
NSTL
万方数据