Medium Mn TRIP-assisted steels

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C and Mn balance in Al-reduced steels • High Al content in steel - interaction with mold flux during continuous casting - interaction with refractory • Reduced Al in alloy design - reduced C or Mn to maintain austenite fraction and stability at intercritical annealing (H-Al alloy)
Investigated alloys C Mn Si Al (wt. % ) Alloy 1 0.11 4.5 0.45 2.2 Alloy 2 0.075 5.1 0.49 2.1 Alloy 3 0.055 5.6 0.49 2.1 * H-Al, 0.12C - 5.8Mn - 0.47Si - 3.1Al
Page 1 and 2: Medium Mn TRIP-assisted steels J.H.
Page 3 and 4: Excellent mechanical balance • Ty
Page 5 and 6: Medium manganese TRIP steels • 0.
Page 7 and 8: Fe-0.12C-5Mn-Al • Modified Fe-Al-
Page 9 and 10: Microstructure after hot-rolling L-
Page 11 and 12: Microstructure (a) 720 o C after an
Page 13 and 14: Phase maps of annealed sheets 1.1Al
Page 15: Mechanical stability of austenite A
Page 19 and 20: Mechanical properties alloy 1 alloy
Page 21 and 22: Kinetics of martensite transformati
Page 23: Summary • Low carbon, medium Mn T

Medium Mn TRIP-assisted steels

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