船用氮气储存罐的筒体和封头焊接工艺分析.PDF

SHIP ENGINEERING 船 舶 工 程 Vol.37 No.12 2015 总第37 卷，2015 年第12 期 船用氮气储存罐的筒体和封头焊接工艺分析 吴志亚，何旭丹 （江苏省无锡交通高等职业技术学校，江苏无锡 214151 ） 摘 要：Q345R 钢是普通低合金高强度钢，广泛的用于压力容器制造行业。其S、P 含量控制较严， 焊接性较好，但是由于含有一定量的合金元素，淬硬、冷裂倾向都比低碳钢大一些。通过船用氮气储存 罐的筒体和封头环焊缝的焊接，分析了Q345R 钢的化学成分和机械性能，通过选用合理的焊接材料、坡 口形式、焊接方法、焊接工艺来保证储存罐的焊缝质量。 关键词：氮气储存罐；Q345R 钢；焊接工艺 中图分类号：U671.83; TG457.11 文献标志码：A 【DOI 】10.13788/j.cnki.cbgc.2015.12.078 Analysis on Welding Procedure of the Barrel and Shell Cover of Marine Nitrogen Storage Tanks WU Zhi-ya, HE Xu-dan (Wuxi Institute of Communications Technology, Jiangsu Wuxi 214151, China) Abstract: Q345R Steel is low-alloy high-strength steel which is widely used in the pressure vessel manufacturing industry. Its S-content and P-content is controlled strictly, so its weldability is good. But because of containing a certain amount of alloy elements, its tendency of hardening, cold cracking is higher than the low carbon steel. This article takes girth welding on the barrel and shell cover of the nitrogen storage tanks as example to analyze the chemical components and mechanical characteristics of Q345R Steel. The conclusion can be drawn that the weld quality of storage tanks can be guaranteed by choosing reasonable welding material, groove form, welding method and welding procedure. Key words: nitrogen storage tanks; Q345R Steel; welding procedure 0 引言 封头的焊接工艺。该储存罐直径为600mm，设计压力 自从20 世纪60 年代以来，由于中东石油的大量 为 1.1MPa，设计温度50℃，属于一类压力容器。压 开采和运输，以及世界各发达国家经济迅猛发展对石 力容器在选用钢板时应考虑：1）设计压力；2 ）设计 油能源的依赖，海上石油运输得到了蓬勃的发展，油