High Strength Consumables for High Dilution Submerged Arc Welding

2006 ◽  
Author(s):  
Matthew James ◽  
Teresa Melfi ◽  
Rajeev Katiyar
Keyword(s):  
High Strength ◽  
Alloy System ◽  
High Heat ◽  
High Dilution ◽  
Base Materials ◽  
Welding Consumables ◽  
Future Work ◽  
Welding Processes ◽  
Submerged Arc ◽  
Very High

Current requirements for high strength pipelines are placing extreme demands on welding consumables. These applications include strain based pipelines using X80 as well as traditionally designed pipelines using X100 and even X120 base materials. Traditional procedures used in the pipemills for both the seam weld and the jointer weld utilize a SAW process with very high dilution and high heat inputs. Existing consumables are not able to meet the minimum strength requirements under these conditions. A project was undertaken to develop an alloy system that could meet these requirements while still allowing the use of traditional welding processes. Testing results with this new consumable are presented and future work is described. This alloy system may also prove useful in other high dilution applications where high strength is required.

Effect of Welding Processes with High Heat Input on the Microstructure and Toughness of Coarse-Grained Heat-Affected Zone of a High-Strength High-Toughness Steel

2018 ◽  
Vol 937 ◽  
pp. 61-67
Author(s):  
Yu Jie Li ◽  
Jin Wei Lei ◽  
Xuan Wei Lei ◽  
Oleksandr Hress ◽  
Kai Ming Wu
Keyword(s):  
Low Temperature ◽  
Impact Toughness ◽  
Heat Affected Zone ◽  
Heat Input ◽  
High Strength ◽  
High Heat ◽  
Coarse Grained ◽  
Low Temperature Impact Toughness ◽  
The Impact ◽  
Welding Processes

Utilizing submerged arc welding under heat input 50 kJ/cm on 60 mm thick marine engineering structure plate F550, the effect of preheating and post welding heat treatment on the microstructure and impact toughness of coarse-grained heat-affected zone (CGHAZ) has been investigated. The original microstructure of the steel plate is tempered martensite. The yield and tensile strength is 610 and 660 MPa, respectively. The impact absorbed energy at low temperature (-60 °C) at transverse direction reaches about 230~270 J. Welding results show that the preheating at 100 °C did not have obvious influence on the microstructure and toughness; whereas the tempering at 600 °C for 2.5 h after welding could significantly reduce the amount of M-A components in the coarse-grained heat-affected zone and thus improved the low temperature impact toughness.

Hybrid Laser-Arc Welding of HSLA-65 Steel Plate: Microstructural and Mechanical Property Evaluation of Butt Welds

2012 ◽  
Vol 706-709 ◽  
pp. 2992-2997 ◽  
Author(s):  
Cameron Munro ◽  
Allison E. Nolting ◽  
Xin Jin Cao ◽  
Priti Wanjara
Keyword(s):  
Heat Input ◽  
Arc Welding ◽  
Hsla Steel ◽  
Gas Metal Arc Welding ◽  
High Strength ◽  
High Heat ◽  
Impact Testing ◽  
Fibre Laser ◽  
Butt Welds ◽  
Welding Processes

High strength low alloy (HSLA) steel, namely HSLA-65, has shown promise as a replacement for more common high strength shipbuilding steels. However, conventional high heat input welding processes can cause significant distortion, often requiring expensive post-weld reworking. Butt welds in HSLA-65 steel were fabricated using a hybrid fibre laser-gas metal arc welding (GMAW) procedure to investigate the efficacy of distortion mitigation via low heat input joining. Heat input from the laser and arc sources were roughly equal at ~5.2 kW each, and plates were welded in either the laser-leading or arc-leading configuration. In either case, butt welds in ~9 mm thick plates could be made in a single pass at a total heat input of ~0.4 kJ/mm. Welding induced distortion was minimal. Analysis of the microstructure and microhardness of the welds is provided, along with some preliminary results of mechanical and impact testing.

Development of the SAW Wire for High Strength TMCP Steel

2005 ◽  
Vol 475-479 ◽  
pp. 269-272
Author(s):  
Xiao Huai Xue ◽  
Song Nian Lou ◽  
Bainian Qian ◽  
Shaofei Yu
Keyword(s):  
Acicular Ferrite ◽  
High Strength ◽  
Alloy System ◽  
Carbon Equivalent ◽  
Low Carbon ◽  
Key Factors ◽  
Mixture Ratio ◽  
Mn Content ◽  
Nitrogen Contents ◽  
Submerged Arc

The wire for high strength and toughness TMCP steels of submerged arc welding was developed. The low carbon and micro-alloying with Ti-B system was adopted to obtain the acicular ferrite dominated deposited metals. Experimental results show that the carbon equivalent (Pcm) should be higher than 0.17, which can ensure the high strength and high toughness of the deposited metals. In the alloy system, Oxygen and Nitrogen contents, micro-alloyed elements (C, Mn) and its mixture ratio are the key factors that affect the deposited metals toughness. With increasing C, Mn content, the acicular ferrite is increased and toughness is improved. Oxygen and Nitrogen are deleterious to the toughness of deposited metals.

The Effect of Two Wire Submerge Welding Parameters on the Properties of Welded Joint

2015 ◽  
Vol 750 ◽  
pp. 172-177
Author(s):  
Chun Wei Ma ◽  
Ting Yu Liu ◽  
Yan Yan Tang ◽  
Qing Hua Lu ◽  
Chong Gui Li ◽  
...  
Keyword(s):  
Arc Welding ◽  
Welded Joint ◽  
Welding Process ◽  
High Strength ◽  
High Heat ◽  
Submerged Arc Welding ◽  
Welding Parameters ◽  
Arc Welding Process ◽  
Charpy Absorbed Energy ◽  
Submerged Arc

In this paper, the influence of double wire submerged arc welding parameters on the mechanical properties of high strength low alloy has been investigated. The 20mm steel plate has been welded by double wire submerged arc welding process using different welding parameters. The Charpy absorbed energy of specimens is assessed using impact test at the temperature of -50°C. Testing results show that high heat input parameters will lead to low strength of welded joint. Impact toughness of fusion line is lower than that of other areas of welded joint.

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