Author/Authors :
Hans-Olof Andrén، نويسنده , , Guangjun Cai، نويسنده , , Lars-Erik Svensson، نويسنده ,
Abstract :
The microstructure of weld metals of 2.25Cr−1Mo, 5Cr−0.5Mo, 9Cr−1Mo and 12Cr−1Mo type steels was studied with electron microscopy and atom probe field ion microscopy. Many different types of carbides and nitrides precipitated during welding and post-weld heat treatment (MC, M2C, M3C, M7C3, M23C6, MN, M2N). The eutectoid decomposition of retained austenite gave large aggregates of carbides which were found to be detrimental to the impact toughness of the weld metal.
