Abstract
ABSTRACT Lei, X.; Wu, K.; Wang, H., and Yu, L., 2015. Microstructure evolution and alloying features of a developed high strength and high toughness weld metal used for pipeline steels. The microstructure evolution and continuous cooling transformation curves of the simulated heat-affected zone of a developed high strength and high toughness weld metal was investigated by means of thermal simulation on a Gleeble 3,500. This weld metal was picked up from the welding joint of a high strength and high toughness pipeline steel which was welded with commercial welding materials. Results showed that fine acicular ferrite was the main microstructure during a wide range of cooling rates. Actual welding experiment was also carried out with the heat input of 21 kJ / cm. The yield strength of the weld joint in weld metal is 875 MPa. The average impact toughness are about 104 and 183 J at –30° C in weld metal and the fusion line, respectively. The observed results indicated that the developed weld metal had superior ...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
