双金属复合管半自动焊接工艺研究

发布时间：2018-11-11 16:33

【摘要】：本文以不锈钢内衬、机械复合方式的双金属复合管(以下简称复合管)为研究对象,采用不同焊接方法、焊接材料、焊接工艺进行焊接工艺试验,对所得焊接接头进行全面深入的测试、试验,分析其力学性能、理化性能、耐腐蚀性能、微观组织,论证并掌握复合管各焊接工艺方案的可行性和优劣性,根据各工艺方案的特长和不足,制定不同工况条件下最优的焊接工艺方案,确保获得质量优良的复合管焊接接头。通过对复合管焊接接头进行组织结构及硬度分析、模拟工况条件下的挂片试验、电化学测试等实验手段,研究复合管充氩焊接工艺和免充氩焊接工艺这两种工艺方案。获得复合管焊接接头的微观组织状况、硬度变化趋势、合金元素含量变化、在模拟油气田高温高压工况的条件下,其焊接接头对二氧化碳的耐腐蚀能力。总结出最优化的焊接工艺方案。
[Abstract]:In this paper, stainless steel lining, mechanical composite bimetallic composite pipe (hereinafter referred to as composite pipe) as the research object, using different welding methods, welding materials, welding process to carry out welding process test, The welded joints were tested and tested thoroughly, and the mechanical properties, physical and chemical properties, corrosion resistance, microstructure of the welded joints were analyzed, and the feasibility and advantages and disadvantages of each welding process plan of the composite pipe were demonstrated and grasped. According to the advantages and disadvantages of each process plan, the optimal welding process scheme under different working conditions is established to ensure the quality of the welded joint of the composite pipe. By analyzing the microstructure and hardness of the welded joint of composite pipe, the hanging sheet test and electrochemical test under simulated working conditions, the two technology schemes of argon filled welding and non charged argon welding of composite pipe are studied. The microstructure, hardness change trend and alloy element content of welded joint of composite pipe were obtained. The corrosion resistance of welded joint to carbon dioxide was simulated under the condition of high temperature and high pressure in oil and gas field. The optimum welding process scheme is summarized.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG457.6

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