Laser-arc hybrid welding of thick high tensile strength steel plates

2015 ◽  
Author(s):  
Qinglong Pan ◽  
Masami Mizutani ◽  
Yousuke Kawahito ◽  
Seiji Katayama
Keyword(s):  
Tensile Strength ◽  
Steel Plates ◽  
Hybrid Welding ◽  
High Tensile Strength

High power disk laser-metal active gas arc hybrid welding of thick high tensile strength steel plates

2016 ◽  
Vol 28 (1) ◽  
pp. 012004 ◽  
Author(s):  
Qinglong Pan ◽  
Masami Mizutani ◽  
Yousuke Kawahito ◽  
Seiji Katayama
Keyword(s):  
Tensile Strength ◽  
High Power ◽  
Steel Plates ◽  
Hybrid Welding ◽  
High Tensile Strength ◽  
Disk Laser

Effect of shielding gas on laser–MAG arc hybrid welding results of thick high-tensile-strength steel plates

2016 ◽  
Vol 60 (4) ◽  
pp. 653-664 ◽  
Author(s):  
Qinglong Pan ◽  
Masami Mizutani ◽  
Yousuke Kawahito ◽  
Seiji Katayama
Keyword(s):  
Tensile Strength ◽  
Steel Plates ◽  
Hybrid Welding ◽  
Shielding Gas ◽  
High Tensile Strength

Microstructures and Mechanical Properties of Welded Joints of Several High Tensile Strength Steel

2018 ◽  
Vol 941 ◽  
pp. 224-229
Author(s):  
Takahiro Izumi ◽  
Tatsuya Kobayashi ◽  
Ikuo Shohji ◽  
Hiroaki Miyanaga
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Weld Metal ◽  
Welded Joints ◽  
Welded Joint ◽  
Steel Plates ◽  
Fatigue Properties ◽  
High Tensile Strength ◽  
The Matrix ◽  
Microstructures And Mechanical Properties

Microstructures and mechanical properties of lap fillet welded joints of several high and ultra-high tensile strength steel by arc welding were investigated. Steel plates having tensile strength of 400 (SPH400W), 590 (SPC590Y, SPC590R), 980 (SPC980Y) and 1500 MPa (SAC1500HP) class with 2 mm thickness were prepared. Four types of joints were formed by MAG welding; SPH400W/SPH400W, SPC590Y/SPC590Y, SPC980Y/SPC980Y and SAC1500HP/SPC590R. In joints with SPC590Y, SPC980Y and SAC1500HP steel which matrixes are martensitic microstructures, the HAZ softens due to transformation of martensite into ferrite with precipitating cementite. By using high and ultra-high tensile strength steel, the weld metal is strengthened due to dilution of the matrix into the weld metal and thus tensile shear strength of the welded joint increases. In the fatigue test, similar S-N diagrams were obtained in the all welded joints investigated. It seems that the effect of stress concentration due to the shape of the welded joint on fatigue properties is larger than that of the strength of the matrix.

scholarly journals YAG Laser-TIG Hybrid Welding of 800 MPa-Class High Tensile Strength Steel

2006 ◽  
Vol 70 (2) ◽  
pp. 134-137 ◽  
Author(s):  
Koji Murakami ◽  
Yutaka Mitooka ◽  
Makoto Hino ◽  
Haruyoshi Iogawa ◽  
Hiroyuki Ono ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Hybrid Welding ◽  
High Tensile Strength ◽  
Yag Laser

scholarly journals Fracture Toughness and Microstructure of Laser Weld Metal of 780MPa Class High Tensile Strength Steel Plates

2008 ◽  
Vol 26 (1) ◽  
pp. 48-53
Author(s):  
Tsunehisa HANDA ◽  
Koutarou INOSE ◽  
Susumu TSUKAMOTO ◽  
Fumiyoshi MINAMI ◽  
Mitsuru OHATA ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Weld Metal ◽  
Steel Plates ◽  
Laser Weld ◽  
High Tensile Strength
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