Influence of Normalizing Process on the Microstructure and Mechanical Properties of S275NL High-toughness Steel for Wind Towers
GAO Lifu
Abstract：The influence of different normalizing processes on the microstructure and mechanical properties of S275NL high-toughness steel for wind towers was studied by optical microscope and mechanical performance testing equipments. The results showed that, with the increasing of normalizing temperature, the strength of plates was decreased, the elongation and Z property were gradually increased, and the impact toughness at low temperature was improved. The influence of holding time in normalizing process on the mechanical properties was not significant. After normalizing process at 900℃suitable temperature plus 175 minutes holding time, the plate microstructure is fine and get uniform ferrite and pearlite, it has reasonable strength margin, matching strength with toughness and good comprehensive mechanical properties.
Keywords：high-toughness steel for wind towerS275NLnormalizingmicrostructureproperty
Publication Date：2015-11-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 40-42 )