Q960E钢激光-电弧复合焊接背面成形工艺性能研究

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中图分类号：TG456.7

Abstract： This study focuses on 14mm thick Q96OE steel plates，employing laser-arc hybrid welding technology to systematically investigate the influence mechanisms of key process parameters—including laser power， wire feed speed，defocusing amount， and laser-to-arc distance （ υLS ）—on the quality of weld backside formation. Theresults demonstrate that a significant enhancement in the uniformityand fullnessof the backside weld formation is achieved under the optimized parameters：laser power of 11kW ，welding speed of 1.2m/min ，wire feed speed of 7min ，defocusing amount of 0mm ，and laser-to-arc distance of2 mm. Furthermore，X-ray inspectionconfirmed the weld quality meets the ClassIqualification standard.The mechanical properties of the welded joint fully comply with the requirements of the relevant standards.

Key words： laser arc hybrid welding；welding process；weld formation； mechanical performance

0 前言

自Steen教授于1970年首次提出激光-电弧复合焊接概念以来，这种融合激光深熔透能力、高效能、低热变形特性与电弧工艺适应性广、优异间隙桥接性能的技术[1-3]，迅速成为研究焦点并广泛应用于工业领域。（剩余4224字）