The technology and welding joint properties of hybrid laser-tig welding on thick plate
The technology and welding joint properties of hybrid laser-tig welding on thick plate
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DOI：
10.1016/j.optlastec.2012.11.014
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发表时间：
2013-06
影响因子：
5
通讯作者：
Shenghai Zhang;Yi-fu Shen;Huijuan Qiu
中科院分区：
文献类型：
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作者：
Shenghai Zhang;Yi-fu Shen;Huijuan Qiu
采用激光自焊和激光-TIG复合焊接技术对10 CrNiMnMoV低合金高强度结构钢厚板进行了焊接试验。通过对激光自焊、激光焊接和激光-TIG复合焊接的工艺参数和焊接接头的对比分析，总结了激光-TIG复合焊接的独特优势。采用优化后的复合焊接工艺参数，获得了无明显缺陷的良好焊接接头，并按照行业标准测试了接头的力学性能。结果表明，复合焊接技术在厚板焊接中具有一定的优势和可行性。它可以降低对激光功率的要求，对降低复合焊接时焊缝的深宽比具有重要意义，使厚板焊接时熔池中的气体易于上升和逸出。因此，孔隙形成趋势降低。同时，复合焊接提高了焊接速度，优化了能量输入。复合焊接接头的组织过渡较好，晶粒度较好，硬度高于母材。此外，其拉伸强度和冲击韧性与基材相当。因此，复合焊接接头完全可以满足工业需要。
The technologies of autogenous laser welding and hybrid laser-TIG welding are used on thick plate of high strength lower alloy structural steel 10CrNiMnMoV in this article. The unique advantages of hybrid laser-TIG welding is summarized by comparing and analyzing the process parameters and welding joints of autogenous laser welding laser welding and hybrid laser-TIG welding. With the optimal process parameters of hybrid welding, the good welding joint without visible flaws can be obtained and its mechanical properties are tested according to industry standards. The results show that the hybrid welding technology has certain advantages and possibility in welding thick plates. It can reduce the demands of laser power, and it is significant for lowering the aspect ratio of weld during hybrid welding, so the gas in the molten pool can rise and escape easily while welding thick plates. Therefore, the pores forming tendency decreases. At the same time, hybrid welding enhances welding speed, and optimizes the energy input. The transition and grain size of the microstructure of hybrid welding joint is better and its hardness is higher than base material. Furthermore, its tensile strength and impact toughness is as good as base material. Consequently, the hybrid welding joint can meet the industry needs completely.