This paper discusses the development of a girth welding technique for X120 linepipe. The solid-wine, pulsed gas metal arc welding (PGMAW) process with Ar-based shielding gas was selected for its process control, and low oxygen and hydrogen potentials. The weld metal microstructure was designed using fundamental metallurgical principles and verified through the evaluation of about 20 experimental wires and several commercial-scale heats of wire. Weld metal chemistry and shielding gas composition were optimized. The developed microstructure is termed acicular ferrite interspersed in martensite (AFIM). Transmission electron microscopy was the primary tool used for microstructural analysis and weld metal inclusion design.
Girth welding development for X120 linepipe
International Journal of Offshore and Polar Engineering ; 14 , 1 ; 18-28
2004
11 Seiten, 24 Quellen
Article (Journal)
English
Development and mechanical properties of X120 linepipe
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