Crack Resistance of Welded Joints of Pipe Steels of Strength Class K60 of Different Alloying Systems
The crack resistance of welded joints of pipe steels of strength class K60 and different alloying systems is studied. The parameter of the crack tip opening displacement (CTOD) is shown to be dependent on the size of the austenite grains and on the morphology of bainite in the superheated region of the heat-affected zone of the weld. The crack resistance is shown to be controllable due to optimization of the alloying system.
Key wordspipe steel welded joint heat-affected zone weld crack resistance size of austenite grains bainite morphology
The work has been performed within State specification on the topic “Structure” (No. 01201463331) with support of Project No. 15-15-2-16 of the Ural Branch of the Russian Academy of Sciences.
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