摘要
通过对轧制态的含磷Nb-Ti高强IF钢冷轧硬卷进行750～870℃退火试验,在Instron5569拉伸试验机上测试计算了塑性应变比r值和平面各向异性指数Δr,并对不同退火温度下的试样进行了ODF分析。结果表明,退火温度从750℃升高到870℃,试验钢的r0、r45、r90和珋r均随温度的升高而增大;平面各向异性随退火温度的升高而降低。结合显微组织分析,810～840℃退火时,试验钢获得最佳综合性能。试验钢从冷轧态到完全再结晶,{001}<110>、{110}<110>织构强度降低,{112}<110>织构遗传成为最强织构,而{111}<110>织构比{111}<112>织构强,使Δr值为负值;最佳退火温度(810～840℃)条件下最大珋r值为1.65,Δr为-0.38。
The P-contained Nb-Ti-IF cold rolled steel sheet was annealed at 750-870 ℃,then the plastic strain ratio（r-value） and the planar anisotropic index（Δr） were tested and calculated by use of Instron5569 tensile testing machine.The ODF analysis was carried out on the specimens annealed at different temperatures.The results show that the values of r0,r45,r90 and increase as the annealing temperature increases from 750 ℃ to 870 ℃,while the planar anisotropy decreases.According to the microstructure analysis,the best comprehensive properties of the experimental steel sheet are obtained when annealed at 810-840 ℃.When the as-cold rolled steel is completely recrystallized,the intensity of {001}110 and {110}110 texture decrease,the {112}110 texture become the strongest.However,the {111}112texture is less stronger than the {111}110texture,which makes the Δr value negative.The maximum value of the experimental steel is 1.65,and the Δr value is-0.38 when annealed at the optimal temperatures of 810-840 ℃.
出处
《金属热处理》
CAS
CSCD
北大核心
2012年第11期87-90,共4页
Heat Treatment of Metals
关键词
平面各向异性
IF钢
退火
织构
取向分布函数
planar anisotropy
IF steel
annealing
texture
orientational distribution function（ODF）
