390MPa级超低碳BH钢织构演变规律

采用ODF织构分析方法,对390 MPa级超低碳BH钢板热轧、冷轧、退火过程织构演变规律进行研究,并对不同冷轧压下量和不同退火工艺织构进行分析。结果表明:经冷轧变形后的钢板有较强的择优取向,具有典型的{112}<110>和{111}<110>织构,形变织构中的不利织构{001}<110>较强;冷轧压下率为80%时再结晶退火后钢板具有较强的γ织构,{111}<112>织构取向密度高达11.7;退火温度和保温时间对α织构影响不大,提高退火温度和延长保温时间使γ织构增强,r值增加。

Texture evolution of 390 MPa grade ultra low carbon bake hardening steel

Texture evolution in a 390 MPa grade high strength ultra low carbon bake hardening(ULC-BH)steel in the process of hot rolling,cold rolling and annealing is studied by utilizing ODF texture analysis method.The effect of cold rolling reduction and annealing parameters on texture is measured.The results show that the ULC-BH sheet steel after cold rolling has a highly preferred orientation with typical {112}<110> and {111}<110> texture,and strong unfavorable deformation texture {001}<110>.The increase of cold rolling reduction influenced the strength ratio of favorable components to unfavorable components in the annealing textures.After annealing,a very strong γ texture was obtained when cold rolling reduction reached 80%,which intensity peak was at {111}<112> component with f(g)value of 11.7.The annealing temperature and time had little influence on α texture,while increasing annealing temperature and extending holding time enhanced γ texture intensity and r value.