Thermo-mechanical Simulation of Ultra-High Strength Ferrite-Bainite Dual Phase Steel
In the present paper,thermo-mechanical simulation of ultra-high strength ferrite-bainite dual phase (DP) steel was performed using a thermomechanical simulator.Continuous cooling transformation (CCT) diagram was constructed for DP steel.The effects of composition and cooling rate on the kinetics and products of phase transformation and the form of the CCT diagram were investigated.The results have shown that the α→γ transformation in DP steel was found to be more sluggish due to the addition of alloying elements.The segregation of manganese and niobium at austenite grain boundaries is expected to cause a solute drag effect,thereby reducing the rate ofγ→α transformation in DP steel.The pearlite transformation region disappeared for cooling rates from 0.1to 20℃/s.The microstructure comprises of bainite and martenite was obtained at fast cooling rate.The present steel is expected to have a higher hardenability.
Dual phase steel thermo-mechanical simulation CCT diagram hardenability
Lv Wei Wu Di Li Zhuang
School of Graduate, Shenyang Aerospace University, Shenyang 110136, Liaoning, China State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136,Liaoning
国际会议
香港
英文
1367-1370
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）