The formation mechanisms of interlocked microstructures in low-carbon high-strength steel weld metals

2012 ◽  
Vol 67 ◽  
pp. 41-51 ◽  
Author(s):  
X.L. Wan ◽  
H.H. Wang ◽  
L. Cheng ◽  
K.M. Wu
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Formation Mechanisms ◽  
Steel Weld ◽  
Low Carbon ◽  
Weld Metals

Comparative study of high-strength steel weld metals obtained by the SMAW and FCAW processes for offshore applications and mooring chains

2010 ◽  
Vol 24 (12) ◽  
pp. 903-910 ◽  
Author(s):  
Humberto N. Farneze ◽  
Jorge Carlos F. Jorge ◽  
Luís Felipe G. de Souza ◽  
Ivaní de S. Bott
Keyword(s):  
Comparative Study ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Weld ◽  
Weld Metals

Microstructure and impact toughness of high strength steel weld metals deposited by MCAW-RE process using different shielding gases

2021 ◽  
Author(s):  
Walker A. S. Filho ◽  
Guilherme M. S. Silveira ◽  
Jeferson F. M. Costa ◽  
Matheus C. Mendes ◽  
Luís Felipe G. de Souza ◽  
...  
Keyword(s):  
Impact Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Shielding Gases ◽  
Steel Weld ◽  
Weld Metals

Influence of Chemical Composition and Post Welding Heat Treatment on the Microstructure and Mechanical Properties of High Strength Steel Weld Metals

2013 ◽  
Vol 758 ◽  
pp. 21-32 ◽  
Author(s):  
Antonio José Mendes Gomes ◽  
Jorge Carlos Ferreira Jorge ◽  
Luís Felipe Guimarães de Souza ◽  
Ivani S. Bott
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Chemical Composition ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Weld ◽  
Oil Platforms ◽  
Weld Metals ◽  
Heat Treated ◽  
Covered Electrodes

The present work is part of a wide research program which the main goal is the development of welding procedures for chain and accessories for application in mooring systems of oil platforms. In the specific case of the work in subject, the development of different covered electrodes formulations is discussed for obtaining high mechanical strength and impact toughness, of the order of 860 MPa and 50 joules at –20°C, respectively. Welded joints using the developed electrodes were prepared for evaluation of the mechanical properties, using preheat of 200°C, direct current, flat position and heat input of 1.5 kJ/mm. After welding, tensile, impact Charpy-V and hardness tests were performed in specimens removed integrally from the weld metal, both in as welded and heat treated conditions. The post weld heat treatment (PWHT) was conducted at 600°C for 1, 2 and 3 hours. The results shows that the obtained weld metals have mechanical properties higher than the minimum required for the welding of a IACS W22 R4 Grade steel, and particularly good impact properties, which indicates that the correct control of the chemical composition, particularly, of Mn-Ni balance, makes possible to achieve an adequate strength/toughness relationship for high strength steel weld metals, where the PWH is mandatory. In addition, it was verified that the increase in the time of PWHT did not promote substantial impairment on mechanical properties.

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