Strategic Study of CAE >> 2014, Volume 16, Issue 1
Rolling process and fatigue property of a new-type hot-rolled low-carbon TRIP steel
The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China
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Abstract
The mechanical properties, microstructures, fatigue properties and fatigue fractures of the conventional C-Mn wheel steels and the low- carbon low- silicon phosphorus/chromium-contained transformation induced plasticity(TRIP)steel were investigated. Results revealed that the new-type TRIP steel possessed similar yield strength , tensile strength increased by 100~150 MPa and fatigue limit increased by 50~140 MPa,compared with the conventional C-Mn wheel steels. The fatigue limit increased with the increase of the tensile strength. The steel containing ferrite,bainite and retained austenite had a higher fatigue limit than the steel containing ferrite,bainite and pearlite or steel containing ferrite,pearlite and martensite-austenite islands.
Keywords
hot- rolling ; low-carbon TRIP steel ; rolling process ; fatigue property ; fatigue fracture
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