Development of the 600MPa High Aluminum Cold Rolled Dual Phase Steel and its Application
original 600MPa high aluminum dual phase steel had been successfully developed in this paper. The microstructure analysis showed that the microstructures of the steel mainly consist of ferrite and 16％ martensite which distributed around the ferrite grain boundaries. TEM analysis demonstrated that there exist lots of high density dislocations in ferrite as well as an obvious twin-structure and some ribbon structures in martensite. An The tensile test and the bake-hardening test showed that the steel delivers an excellent mechanical properties of Rp0.2=350～390MPa, Rm=620～660MPa，Rp0.2/Rm=0.55～0.65，A80mm=25～29％, n=0.18～0.21 and an excellent bake-hardening property of BH2=50～60MPa as well as an excellent of work-hardening (WH) property of WH=120MPa. The spot-welding test showed that this dual phase steel has a good welding adaptability.Own to the excellent formability, the steel has been successfully used in the production of some auto parts.
dual phase steel martensite high density dislocation bake hardening welding property
WANG Hui LIN Cheng-jiang DENG Zhao-jun GONG Tao TAN Yun-gang YAN Fei YANG Peng
Research and Development Center, WISCO, 430080, Wuhan;Cold Rolling Mill, WISCO, 430081, Wuhan Research and Development Center, WISCO, 430080, Wuhan Cold Rolling Mill, WISCO, 430081, Wuhan
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
827-831
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）