METALLURGICAL UNDERSTANDING TO EXTEND COLD ROLLED HSLA TO HIGHER STRENGTH LEVELS
A new generation of higher strength cold rolled HSLA is studied.Two typical chemical compositions are investigated.The two concepts are based on a partially recovered microstructure with some recrystallized ferrite and few martensite/austenite islands.The microstructural evolutions of these cold rolled grades along the annealing are presented.It is shown that the level of recrystallization achieved at the end of the annealing controls the final mechanical properties.Additionally,depending on the chemical composition,more or less MA constituents are present at the end of the annealing.One concept is designed for the applications that only need higher strength.The second concept is designed for the applications that need a high yield strength/tensile strength ratio.
cold rolled recovery recrystallization microalloying high strength
C.Philippot C.F(o)jer L.Duprez
ArcelorMittal Global R&D Gent - OCAS N.V.,President John. F. Kennedylaan 3,Zelzate,9060,Belgium
国内会议
杭州
英文
357-363
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）