摘要
921A高强钢因其优良的机械性能与耐腐蚀性能被广泛用作船体材料,高压干法水下激光熔覆修复是海洋复杂环境舰船在线修复的优选技术之一。为探究921A舰船钢高压干法水下激光填丝熔覆修复的温度场、应力场以及应变场分布规律,通过SYSWELD软件进行了常压及0.3 MPa压力环境的数值模拟,结果表明,随环境压力变化,试件各阶段温度场均呈纺锤形,高压下熔化同样的试件需要比常压更高的激光功率;高压与常压等效应力以及不同方向上的应力均小于921A舰船钢的屈服强度;高压环境试件的横向、纵向、轴向变形略微大于常压环境,在轴向上分布较为明显。
921A high strength steel is widely used as hull material because of its excellent mechanical and corrosion resistance properties.Hyperbaric underwater laser cladding repair is one of the preferred technologies for on-line repair of ships in complex marine environment.In order to explore the distribution law of temperature field,stress field,and strain field of 921A ship steel repaired with hyperbaric underwater laser wire flling cladding,the numerical simulations of atmospheric pressure and 0.3 MPa pressure environment are carried out by SYSWELD software.The results show that:with the change of environmental pressure,the temperature field of the specimen at each stage is spindle shaped,and higher laser power is required to melt the same specimen under high pressure.The equivalent stress and the stress in different directions for both high pressure and atmospheric pressure are less than the yield strength of 921A ship steel.The transverse,longitudinal and axial deformation of the specimen in high pressure environment is slightly larger than that in atmospheric pressure environment,which distributed more clearly in the axial direction.
作者
周飞鸿
朱加雷
寇荣魁
焦向东
李丛伟
张仁祥
Zhou Feihong;Zhu Jialei;Kou Rongkui;Jiao Xiangdong;Li Congwei;Zhang Renxiang(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102600,China;China Petrochemical Qingdao Petrochemical Co.,Ltd.,Qingdao 266041,Shandong,China)
出处
《应用激光》
CSCD
北大核心
2023年第10期22-31,共10页
Applied Laser
基金
北京市教育委员会科技计划重点项目(KZ202210017023)。
