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Author:

Wang, Zijian (Wang, Zijian.) | Xu, Guojian (Xu, Guojian.) | Li, Wuhong (Li, Wuhong.) | Wang, Chuanqiang (Wang, Chuanqiang.) | Wu, Shikai (Wu, Shikai.)

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Abstract:

The 14 mm thick EH36 high strength steels are welded by the fiber-laser-MAG hybrid welding process. The effects of laser power, welding speed and welding current on the weld formation are investigated and the microstructures and perfomances of welded joint under the optimal process parameters are analyzed. The results show that the weld penetration increases and the weld width is basically unchanged with the increase of laser power. With the increase of welding speed, the weld width decreases and with the increase of welding current, the weld width is basically unchanged. Under the optimal welding process parameters, the weld formation is good and there are no welding defects. The microstructures of the heated affected zone and weld zone are mainly composed of lath martensite. The hardness of weld metal is greater than that of the base metal. The fracture position of the tensile specimen is within the base metal. There are no cracks on the tensile surface after the transverse bending test. The fracture morphology of weld impact specimen is quasi cleavage fracture. © 2018, Chinese Lasers Press. All right reserved.

Keyword:

Welds Steel fibers Morphology Microstructure High strength steel Fracture Gas welding Fiber lasers

Author Community:

  • [ 1 ] [Wang, Zijian]School of Material Science and Engineering, Shenyang University of Technology, Shenyang; Liaoning; 110870, China
  • [ 2 ] [Xu, Guojian]School of Material Science and Engineering, Shenyang University of Technology, Shenyang; Liaoning; 110870, China
  • [ 3 ] [Li, Wuhong]Shenyang Zhongke Raycgam Science and Technology Co., Ltd., Shenyang; Liaoning; 110021, China
  • [ 4 ] [Wang, Chuanqiang]Industrial Technology Research Institute of Liaoning Additive Manufacturing Co., Ltd., Shenyang; Liaoning; 110021, China
  • [ 5 ] [Wu, Shikai]Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China

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Source :

Chinese Journal of Lasers

ISSN: 0258-7025

Year: 2018

Issue: 10

Volume: 45

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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