Deformační odpory vybraných mikrolegovaných ocelí za tepla

Abstract

Microalloyed steel X52P or EN 10216-3, which is intended for the production of seamless steel tubes for pressure purposes, and X52C or EN 10210-1 vary especially by the amount of niobium (0.013 % in case of the steel EN 10216-3 and 0.037 % for the EN 10210-1, respectively). Uniaxial hot compression tests performed on the Hot Deformation Simulator HDS-20 were utilized to compare the influence of the niobium amount on hot flow stresses of these steels. Decrease of the temperature led to an increase of the hot flow stress, in case of both steels. The same influence had an increase of the strain rate value. There was found out, the hot flow stress of the steel EN 10210-1 is almost at each temperature higher against of the steel EN 10216-3.