Properties of the welded joints of ultra-fine grained steels

摘要

Increasing carbon content can restrain the softening extent. Grain refining hardly affects the weld bond toughness of steel. Weld bond toughness generally decreases with increasing equivalent carbon content/However, a certain range is present, in which weld bond does not decrease with increasing equivalent carbon content for Al-Si weathering steels. Within this range, the higher the carbon content, the higher weld bond toughness.