Prediction of the Microstructure of Submerged-Arc Linepipe Weld

H.K.D.H. Bhadeshia, L.-E. Svensson and B. Gretoft


An important factor controlling the toughness of steel weld deposits is the primary microstructure. Recent theoretical work has indicated that thsi microstructure can be rationalised with the help of phase transformation theory. The theory has been used to predict successfully the microstructure of Fe-C-Si-Mn and Fe-C-Si-Mn-Ni manual metal arc welds. In this work we report the application of this theory to longitudinal two-pass submerged arc Fe-C-Si-Mn and Fe-C-Si-Mn-Mo welds. The results are compared with new experimental results and with mechanical property data.

Proceedings of the Third International Conference on Welding and Performance of Pipelines, 1986, published by the Welding Institute, Abington, U.K.

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