CT80连续油管TIG焊对接接头热循环过程研究
Welding Thermal Cycle of CT 80 Coiled Tube Butt Joint by TIG Welding
李 霄，石 凯，王洪铎，李 洁
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作者单位：（西安石油大学 材料加工工程重点学科实验室，陕西 西安 710065）
中文关键字：连续油管；焊接接头；性能
英文关键字： coiled tubing; welded joint; property
中文摘要：采用热电偶多点同步测量的方法研究了CT80连续油管对接接头的焊接热循环过程。结果表明，由于CT80连续油管管径小，焊接热累积效应明显，热影响区中总是存在不同程度的软化区。为获得良好的焊接接头性能，在制定焊接工艺时，应避免热量的过分集中，从而减小软化的幅度及范围。
英文摘要：The thermal cycle during butt welding was studied by thermocouple and multi-point synchronized measuring technique. The results show that CT80 is very sensitive to welding heat, and the heat accumulation is obvious for mini-dimension coiled tubing, different degree of softening always exist in HAZ. In order to get good properties, the strength matching should be pay more attention during welding process setting, to avoid welding heat assembly for reducing the softening scale and degree.