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作者:

Yang, Shoubing (Yang, Shoubing.) | Wang, Dongxu (Wang, Dongxu.) | Yang, Li (Yang, Li.) | Zhang, Fulong (Zhang, Fulong.) | Zhang, Chi (Zhang, Chi.) | Zhou, Bin (Zhou, Bin.) | Liu, Chaojie (Liu, Chaojie.) | Huang, Genzhe (Huang, Genzhe.)

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EI Scopus SCIE

摘要:

Laser-arc hybrid welding can improve production efficiency, and thus, it is being used in an increasing number of industries. Herein, the effects of laser-arc hybrid welding process param-eters on the microstructure and mechanical properties of welded joint of low-and medium-carbon steels were investigated. Welding seam with best quality and no defects was obtained at welding current, arc voltage, laser power, and welding speed of 260 A, 24.8 V, 3300 W, and 0.8 m/min, respectively. Moreover, the enrichment of Mn in the weld zone promoted bainite formation. Rapid cooling led to the pseudo-eutectic phenomenon in the heat-affected zone (HAZ) on both sides of the weld; therefore, when an HAZ was closer to the weld on both sides, the pearlite content was higher. For low-carbon steel, the microstructure of the HAZ comprised ferrite, pearlite, and ferrite widmanstatten. For medium-carbon steel, the microstructure of the HAZ comprised a large amount of pearlite and a small amount of ferrite. In welded joint of both types of steels, differences in microstructure and internal stress altered the nanostructure morphology and distribution characteristics of cementite. The welded joint also had considerably better tensile strength due to a large number of dislocations and better grain refinement, which led to tensile fractures in the base metal zone of low-carbon steel. For a prefabricated weld notch, the tensile fracture mode was a ductile fracture with massive dimples.

关键词:

Low-and medium-carbon steel Laser-arc hybrid welding Microstructure Mechanical property

作者机构:

  • [ 1 ] [Yang, Shoubing]Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
  • [ 2 ] [Wang, Dongxu]Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
  • [ 3 ] [Yang, Li]Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
  • [ 4 ] [Liu, Chaojie]Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
  • [ 5 ] [Huang, Genzhe]Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
  • [ 6 ] [Zhang, Fulong]Yancheng Inst Technol, Coll Mech Engn, Yancheng 224051, Peoples R China
  • [ 7 ] [Zhang, Chi]Jilin Univ, Sch Mech & Aerosp Engn, Changchun 130025, Peoples R China
  • [ 8 ] [Zhou, Bin]Beijing Univ Technol, Fac Mat & Mfg, Key Lab Adv Funct Mat, Minist Educ China, Beijing 100124, Peoples R China

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来源 :

OPTIK

ISSN: 0030-4026

年份: 2022

卷: 268

3 . 1

JCR@2022

3 . 1 0 0

JCR@2022

ESI学科: PHYSICS;

ESI高被引阀值:41

JCR分区:2

中科院分区:4

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