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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Narrow gap multi-pass laser butt welding of explosion welded CP-Ti/Q23513 bimetallic sheet by using a copper interlayer
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Narrow gap multi-pass laser butt welding of explosion welded CP-Ti/Q23513 bimetallic sheet by using a copper interlayer

机译：狭窄的间隙多通激光对接爆炸焊接CP-TI / Q23513双金属板通过使用铜层间

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摘要

Butt welding of explosion welded Ti/steel bimetallic sheet is still a challenging task due to brittle Ti-Fe intermetallic compounds (IMCs) generated in the transition zone between Ti and steel. Laser butt welding of Ti/steel bimetallic sheet was performed in this work. Preliminary results showed that cracks usually observed in the transition zone of arc welded joint could be effectively avoided by using laser welding and a copper interlayer. The key point was the elaborate control of the remolten volume of copper interlayer. The laser butt welded joint achieved was evaluated by using SEM, EDS and micro hardness test. Tensile tests, bending tests and V-notched Charpy impact tests were conducted to reveal the mechanical properties. The tensile strength and impact absorbing energy of the butt joint were about 73% and 77% that of the CP-Ti/Q235B bimetallic sheet, respectively. The initiation position and propagation path of the crack were observed by high-speed imaging in both face and root bending tests. Finally, improvements brought by the laser butt welding process were concluded and strategies for improving the processing scheme in the future were suggested. (C) 2017 Elsevier B.V. All rights reserved.
机译：由于Ti和钢的过渡区产生的脆性Ti-Fe金属间化合物（IMC），爆炸焊接焊接Ti /钢双金属片的焊接焊接仍然是一个具有挑战性的任务。在这项工作中进行了Ti /钢双金属板的激光对接焊接。初步结果表明，通过使用激光焊接和铜层间，可以有效地避免通常在弧焊焊接接头的过渡区中观察到的裂缝。关键点是精细控制铜中间层的胶凝体积。通过使用SEM，EDS和微硬度测试评估实现的激光对接接头。进行拉伸试验，弯曲试验和V型曲折的夏比冲击试验，以显示机械性能。对接接头的拉伸强度和冲击吸收能量分别为CP-Ti / Q235B双金属片的约73％和77％。通过双面和根弯曲试验中的高速成像观察裂纹的起始位置和传播路径。最后，结束了激光对接焊接过程带来的改进，并提出了改善未来加工方案的策略。 （c）2017年Elsevier B.V.保留所有权利。

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