Petroleum Refinery Engineering ›› 2024, Vol. 54 ›› Issue (2): 26-31.
• PROCESS EQUIPMENT AND MACHINERY • Previous Articles Next Articles
Li Chaohua, Liu Jingkun
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李超华, 刘井坤
作者简介:
Abstract:
For the full-automatic welding joint of X52 line steel, the welding process parameters were adjusted and optimized while fully considering the mutual influence of double torch and the influence of construction environment. Mechanical tests such as tensile test, bending test, nick break test, and hardness test were conducted to verify the reliability of the welding process, forming a welding process evaluation; At the same time, the problems encountered in on-site welding were analyzed and solved, and the key points for optimizing the welding process parameters of dual torch automatic welding were summarized,forming a full-automatic welding technology with copper backing for X52 pipeline steel. By conducting metallurgical analysis and hardness test on the weld seam, the distribution of the microstructure of the weld metal was analyzed from a microscopic perspective. The positive correlation between the hardness distribution of the X52 pipeline steel weld seam, heat affected zone, and base metal and the content of pearlite in the corresponding metallographic structure was obtained, further verifying the consistency of the metallographic structure of the weld metal and heat affected zone under the welding process conditions. The results indicated that the full-automatic welding process for copper liners could be applied to the welding of large diameter steel pipe, and the use of this process could significantly improved welding quality and efficiency.
Key words: X52 material, large diameter, steel pipe, automatic welding, welding equipment, welding process, welding performance, hardness test;
摘要:
针对X52管线钢的全自动焊焊接接头,充分考虑双焊炬的相互影响以及施工环境的影响,对焊接工艺参数进行了调整和优化,通过拉伸试验、弯曲试验、刻槽锤断试验及硬度试验等机械性能试验验证了焊接工艺的可靠性,形成了焊接工艺评定;同时分析并解决了现场焊接中出现的问题,提炼总结了双焊炬自动焊焊接工艺参数优化的要点,形成了适用于X52管线钢的铜衬垫全自动焊工艺。对焊缝进行了金相分析和硬度试验,从微观上分析了焊缝金属组织结构的分布情况,发现X52管线钢焊缝、热影响区及母材硬度分布与对应区域金相组织中珠光体含量呈正相关,进一步验证了该焊接工艺条件下焊缝金属及热影响区金相组织的一致性。结果表明,铜衬垫全自动焊工艺适用于大口径钢制管道的焊接,采用该工艺可以明显提升焊接质量和焊接效率。
关键词: X52材质, 大口径, 钢制管道, 自动焊接, 焊接设备, 焊接工艺, 焊接性能, 硬度试验
Li Chaohua, Liu Jingkun . Summary of the application of full-automatic welding for X52 material large diameter steel pipe[J]. Petroleum Refinery Engineering, 2024, 54(2): 26-31.
李超华, 刘井坤. X52材质大口径钢制管道全位置自动焊应用总结[J]. 炼油技术与工程, 2024, 54(2): 26-31.
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https://journal01.magtechjournal.com/lyjsygc/EN/Y2024/V54/I2/26
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