scholarly journals δ-Ferrite Behavior of Butt Weld Zone in Clad Steel Plates Depended on Holding Time of PWHT

2014 ◽  
Vol 32 (2) ◽  
pp. 29-36
Author(s):  
Jae-Won Park ◽  
Chul-Ku Lee
Keyword(s):  
Weld Zone ◽  
Holding Time ◽  
Steel Plates ◽  
Butt Weld ◽  
Δ Ferrite ◽  
Clad Steel

Microstructure and Mechanical Properties of Welding Joints of High Nitrogen Steel by Hybrid Laser-Arc Welding

2014 ◽  
Vol 496-500 ◽  
pp. 444-447 ◽  
Author(s):  
Zhi Hua Ma ◽  
Dong Gao Chen ◽  
Hong Wei Liu ◽  
Wu Lin Yang
Keyword(s):  
Mechanical Properties ◽  
Heat Affected Zone ◽  
Arc Welding ◽  
Weld Zone ◽  
Base Material ◽  
Steel Plates ◽  
High Nitrogen ◽  
Hybrid Laser Arc Welding ◽  
Δ Ferrite ◽  
Welding Joints

Hybrid laser-Arc welding was to weld 20 mm thickness high nitrogen austenite stainless steel plates. Microstructure, hardness, mechanical properties and fractography of welding joints were researched. The results showed that the microstructure of heat affected zone and weld metal is austenite and δ-ferrite, and the heat-affected zone of welding joints is Narrow, its softening zone is smaller, the hardness is more uniform, the tensile strength of welding joints is 93.8% of the base material, fractured in the weld zone. The tensile fractography are obviously dimple.

scholarly journals Experimental Study on Laser-MIG Hybrid Welding of Thick High-Mn Steel Plate for Cryogenic Tank Production

2021 ◽  
Vol 9 (6) ◽  
pp. 604
Author(s):  
Du-Song Kim ◽  
Hee-Keun Lee ◽  
Woo-Jae Seong ◽  
Kwang-Hyeon Lee ◽  
Hee-Seon Bang
Keyword(s):  
Low Temperature ◽  
Yield Strength ◽  
Steel Plate ◽  
Weld Zone ◽  
Base Material ◽  
Hardness Test ◽  
Steel Plates ◽  
Hybrid Welding ◽  
Temperature Impact ◽  
Mn Steel

The International Maritime Organization has recently updated the ship emission standards to reduce atmospheric contamination. One technique for reducing emissions involves using liquefied natural gas (LNG). The tanks used for the transport and storage of LNG must have very low thermal expansion and high cryogenic toughness. For excellent cryogenic properties, high-Mn steel with a complete austenitic structure is used to design these tanks. We aim to determine the optimum welding conditions for performing Laser-MIG (Metal Inert Gas) hybrid welding through the MIG leading and laser following processes. A welding speed of 100 cm/min was used for welding a 15 mm thick high-Mn steel plate. The welding performance was evaluated through mechanical property tests (tensile and yield strength, low-temperature impact, hardness) of the welded joints after performing the experiment. As a result, it was confirmed that the tensile strength was slightly less than 818.4 MPa, and the yield strength was 30% higher than base material. The low-temperature impact values were equal to or greater than 58 J at all locations in the weld zone. The hardness test confirmed that the hardness did not exceed 292 HV. The results of this study indicate that it is possible to use laser-MIG hybrid welding on thick high-Mn steel plates.

Study of the Thermal Diffusivity Variation in Thin Duplex Steel Plates Welded by GTAW Process

2018 ◽  
Vol 930 ◽  
pp. 460-465
Author(s):  
Evandro Giuseppe Betini ◽  
Maurilio Pereira Gomes ◽  
Cristiano Stefano Mucsi ◽  
Temístocles de Souza Luz ◽  
Marcos Tadeu D'azeredo Orlando ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
Welding Process ◽  
Laser Flash ◽  
Nitrogen Atmosphere ◽  
Steel Plates ◽  
Digital Data ◽  
Flash Method ◽  
Temperature Profiles ◽  
Butt Weld ◽  
Duplex Steel

This study describes the thermal diffusivity of thin duplex steel plates in the thickness direction measured using the laser-flash method after welding. The work reports the experimental efforts in recording temperature profiles of the grade UNS S32304 duplex steel during autogenous welding. The butt weld autogenous joints were carried out by the GTAW (gas tungsten arc welding) process with either argon or argon - 2% nitrogen atmospheres. The amount of nitrogen in the heat affected regions, after welding, was measured and correlated with the variation of the thermal diffusivity of the studied material. The temperature profiles were obtained using k-type thermocouples connected to a digital data acquisition system. Different thermal cycles and thermal diffusivity values were observed in the heat-affected zone (HAZ) for both samples. In the solidified zone (SZ) was observed similar increase of the thermal diffusivity values for the plates welded with pure argon and argon plus nitrogen atmosphere.

Eddy current impedance imaging in butt weld joints of AISI stainless steel plates

1992 ◽  
pp. 346-350
Author(s):  
B.P.C. Rao ◽  
M.T. Shyamsunder ◽  
C. Babu Rao ◽  
D.K. Bhattacharya ◽  
Baldev Raj
Keyword(s):  
Stainless Steel ◽  
Eddy Current ◽  
Steel Plates ◽  
Butt Weld ◽  
Impedance Imaging ◽  
Weld Joints

scholarly journals A Study on the Fatigue Strength of Welded Joints of Duplex Stainless-Clad Steel Plates for Application in Chemical Tankers

2017 ◽  
Vol 35 (4) ◽  
pp. 1WL-3WL ◽  
Author(s):  
Hironori Ogata ◽  
Kazumasa Sakaida ◽  
Kenji Shinozaki ◽  
Motomichi Yamamoto ◽  
Tadakazu Tanino ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Steel Plates ◽  
Clad Steel

scholarly journals Application of TMCP Type Stainless-Clad Steel Plates to Chemical Tankers

1988 ◽  
Vol 1988 (163) ◽  
pp. 407-414 ◽  
Author(s):  
Masato Zama ◽  
Masahiro Saito ◽  
Hiroshi Yajima ◽  
Tsuyoshi Kabata ◽  
Nobuhiro Seki ◽  
...  
Keyword(s):  
Steel Plates ◽  
Clad Steel

Study on the Organization and Mechanical Properties of Q345R Weld-Joint

2012 ◽  
Vol 562-564 ◽  
pp. 573-577
Author(s):  
Xiao Dong Hu ◽  
Yong Zhang ◽  
Jian Tao Lv ◽  
Sen Zhang
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Weld Seam ◽  
Weld Zone ◽  
Submerged Arc Welding ◽  
Butt Weld ◽  
Heat Treated ◽  
Metallurgical Structure ◽  
Submerged Arc ◽  
Better Than

The butt weld of Q345R with the thickness of 40mm has been manufactured with the submerged-arc welding (SAW). The mechanical properties of the weld seam have been tested and the metallurgical structures have been analyzed. Conclusions have been obtained as follows: the metallurgical structure of multi-layer butt weld is much more complicated than the monolayer ones; only the last weld layer has the obvious zones of weld zone, heat-affected zone (HAZ) and fusion area; the weld zone and the fusion area will be heat treated with the next layers weld finished; the mechanical property of the multi-layer butt weld is much better than the monolayer weld determined by the corresponding organization.

Evaluation of Weld-Zone Corrosion of Shipbuilding Steel Plates for Use in the Arctic Environment

1988 ◽  
Vol 27 (4) ◽  
pp. 311-321 ◽  
Author(s):  
R. J. Brigham ◽  
M. McLean ◽  
V. S. Donepudi ◽  
S. Santyr ◽  
L. Malik ◽  
...  
Keyword(s):  
Weld Zone ◽  
Steel Plates ◽  
The Arctic ◽  
Shipbuilding Steel ◽  
Arctic Environment

Study on the Microstructure and Mechanical Properties of 15CrMoR

2012 ◽  
Vol 472-475 ◽  
pp. 2731-2735
Author(s):  
Xiao Dong Hu ◽  
Qing Kun He ◽  
Jian Tao Lv ◽  
Yong Zhang
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Weld Zone ◽  
Submerged Arc Welding ◽  
Butt Weld ◽  
Heat Treated ◽  
Electric Arc Welding ◽  
The Relationship ◽  
Submerged Arc ◽  
Better Than

The butt weld sample with the material of 15CrMoR has been manufactured with the bonding methods of manual electric arc welding (SMAW) and submerged-arc welding (SAW). The relationship between the microstructure and the mechanical properties has been analyzed in this paper, and the conclusions have been obtained as followed: only the last weld layer has the obvious zones of weld zone, heat-affected zone (HAZ) and fusion area for the multi-layer butt weld, the weld zone and the fusion area will be heat-treated by the next layer welding; the hardness along central intersection shows a W-shaped distribution, and the zone with normalizing organization has the lowest hardness and the surface layer has the highest hardness; the mechanical properties of the multi-layer butt weld are much better than the monolayer weld’s.

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