热处理工艺对冷轧TRIP800钢组织与性能的影响.pdfVIP

30 4 Vol . 3 0 No . 4 2 0 0 9 8 TRANSACT IONS OF MATERIALS AND HEAT T REATMENT August 2 00 9 TRIP800 江海涛, 唐小勇, 唐 荻, 刘 强 ( , 100083 : ( EBSD TRIP800 , : , ; { 001} 100 {011} 100 ; , , ( TRIP , , : ( TRIP ; ( EBSD ; ; : TG1628 : A : 2009 Effect of heat treatment on microstructure and properties of a coldrolled TRIP800 steel JIANG Haitao, TANG Xiaoyong, TANG Di, LIU Qiang ( N ational Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China Abstract: The grain orientation distribution, grain angle, microstructure texture and stability of retained austenite of a coldrolled TRIP steel treated by diff erent process w ere investigated by electron back scattering diffraction technique( EBSD . The eff ect of heat treatment process on mechanical properties of the steel w as discussed. The results show that grains of the annealed steel don t have prevailing orientation and exhibit w eaker texture. The most orientation of fcc grains are {001} 100 and { 011} 100 . The retained austenite distributed at grain boundary disappears after tensile fracture, and transformation induced plasticity( TRIP effect occurs . However, the retained austenite in grains is relative stability , and is observed after tensile test . Key words: transformation induced plasticity ( TRIP steel ; electron back scattering diffraction technique ( EBSD ; grain orientation ; retained austenite SiMn TRIP ( Transformation Induced TRIP , TRIP Plast icity , TRIP ,