吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (02): 349-353.

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Laser lap-welding performance of ultra-high strength steel and micro-alloy steel

GU Zheng-wei1, YU Si-bin1, HAN Li-jun2, MENG Jia1, XU Hong1   

  1. 1. College of Materials Science and Engineering, Jilin University, Changchun 130022, China;
    2. Department of Product Management, The FAW-Wolkswagen Automotive Company LTD, Changchun 130042, China
  • Received:2010-09-25 Online:2012-03-01 Published:2012-03-01

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Abstract: Based on experiments of Yb:YAG laser welding of quenched ultra-high strength steel (UHSS) EN10292TL4225 and micro-alloy steel H340LAD, the effects of welding parameters on welding quality were analyzed. Microstructures of the joints were observed using the laser confocal scanning microscopy. The tensile-shear strength and the hardness distribution of the welded joint were tested, and the microstructure of the fracture surface was analyzed by SEM (HITACHS-4300).The test results showed that the obtained joint using the optimized parameter is characterized by good microstructure and mechanical property, the quality meets the actual need of production.

Key words: materials synthesis and processing technology, ultra-high strength steel, micro-alloy steel, laser welding, microstructure, mechanical property

CLC Number: 

  • TG456.7
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