Role of Heat Input and Ti Addition on Microstructure Evolution, Mechanical Property, and Corrosion Behavior of Welded Joint Produced by Hybrid Laser-Arc Welding of High-Strength Low Alloy Steel

Steels with 50 ksi and up yield points usually acquire their strength from some form of heat treatment. Most of these steels, 11/2 in. thick and up, must be welded using sustained preheat and controlled interpass temperatures, plus controlled welding heat input of approximately 50 to 60 kJ/in. These two items can add as much as 50 percent to the cost of submerged-arc welding, and increases of up to 30 percent are common for manual welding when compared with lower-strength steels previously used. To reduce costs, a quenched and precipitation-hardened steel, ASTM A710 Grade A Class 3, with a high degree of weldability, was tested. This steel, which can be welded without sustained preheat and almost unlimited heat input, has been extensively tested in thicknesses from 21/4 through 6 in. Although this steel costs more than the usual quenched-and-tempered plates at these strength levels, reductions of 40 to 75 percent in welding labor costs are probable. In addition, sizeable material savings should be realized when these items are used in place of HY-80 and HY-100.

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Studies on Microstructure and Mechanical Properties of Weldments Produced in 12 mm Thick Naval Grade High Strength Low Alloy Steel for Sub-Zero Application by Single and Double Pass Hybrid Laser Arc Welding

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-06403-x ◽

2021 ◽

Author(s):

M. Venkatesh Kannan ◽

N. Arivazhagan ◽

M. Nageswara Rao ◽

G. Madhusudhan Reddy ◽

K. V. Phani Prabhakar ◽

...

Keyword(s):

Mechanical Properties ◽

Alloy Steel ◽

Arc Welding ◽

High Strength ◽

Low Alloy Steel ◽

Double Pass ◽

Hybrid Laser Arc Welding ◽

Microstructure And Mechanical Properties

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Hybrid laser arc welding of thick high-strength pipeline steels of grade X120 with adapted heat input

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2019.116358 ◽

2020 ◽

Vol 275 ◽

pp. 116358 ◽

Cited By ~ 6

Author(s):

Ömer Üstündağ ◽

Sergej Gook ◽

Andrey Gumenyuk ◽

Michael Rethmeier

Keyword(s):

Heat Input ◽

Arc Welding ◽

High Strength ◽

Hybrid Laser Arc Welding ◽

Pipeline Steels

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Effect of Weld Parameters on Residual Stress Distribution in Flux Cored Arc Welding of High Strength Low Alloy Steel

Indian Welding Journal ◽

10.22486/iwj.v27i2.148265 ◽

1994 ◽

Vol 27 (2) ◽

pp. 25

Author(s):

G. Madhusudhan Reddy ◽

T. Mohandas

Keyword(s):

Residual Stress ◽

Stress Distribution ◽

Alloy Steel ◽

Arc Welding ◽

High Strength ◽

Residual Stress Distribution ◽

Low Alloy Steel ◽

Flux Cored Arc Welding ◽

Weld Parameters

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Effect of Microstructure on High-Strength Low-Alloy Steel Welded Joint Toughness with Simulation of Heat-Affected Zone Coarse-Grained Area

Metallurgist ◽

10.1007/s11015-021-01067-3 ◽

2021 ◽

Vol 64 (9-10) ◽

pp. 875-884

Author(s):

K. G. Vorkachev ◽

P. P. Stepanov ◽

L. I. Éfron ◽

M. M. Kantor ◽

A. V. Chastukhin ◽

...

Keyword(s):

Alloy Steel ◽

Heat Affected Zone ◽

Welded Joint ◽

High Strength ◽

Coarse Grained ◽

Low Alloy Steel ◽

Effect Of Microstructure

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Low Heat Input Welding for Thin Steel Fabrication

Journal of Ship Production ◽

10.5957/jsp.2006.22.2.105 ◽

2006 ◽

Vol 22 (02) ◽

pp. 105-109

Author(s):

S.M. Kelly ◽

R.P. Martukanitz ◽

P. Michaleris ◽

M. Bugarewicz ◽

T. D. Huang ◽

...

Keyword(s):

Laser Beam ◽

Heat Input ◽

Arc Welding ◽

Process Development ◽

High Heat ◽

Hybrid Laser Arc Welding ◽

Thin Steel ◽

High Heat Input ◽

Time Distortion ◽

Buckling Distortion

As thinner members are used in marine construction, the use of conventional joining techniques results in significant angular and buckling distortion due to the inherent high heat input with these processes. Several low heat input alternatives, including laser beam, gas metal arc, and hybrid laser arc welding, are explored. The paper focuses on process development, real time distortion measurements, and implementation of these processes.

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