Investigation of structural transformations in surface layers of low carbon steel welded joints after laser working and subsequent warming

摘要

Results of metallographic investigations of the welds from high-strength 38×2HM steel obtained by electron beam welding are given. Crystallization nature of the weld metal at welding with deep penetration is investigated. Investigation resultsof large-grain ferrite formation in laser action zones of low-carbon ferritic-pearlitic steels at subsequent heating in temperature rate 600-675°C are stated. The welds metal mechanical properties improvement is indicated.