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利用EBSD技术研究了基于CSP工艺的Hi-B钢热轧板和不同正火时间的正火板沿厚度方向的织构分布特点。研究结果表明,CSP热轧板在厚度方向上仍存在明显的织构梯度,表层Goss织构为最强织构组分,1/4层和中心层均以α织构为主并伴随部分γ织构。正火后试样的总体织构强度下降,且随着正火保温时间的延长,Goss织构强度也逐渐降低;正火时间达到120 s时,试样的织构梯度明显减小,不利于二次再结晶的发展和完善。在保证组织改善和抑制剂抑制效果的前提下,CSP热轧板的正火时间应在30~60 s为宜。
The EBSD technique was used to study the texture distribution of Hi-B hot-rolled plates and normalized plates with different normalizing time in the thickness direction based on CSP technology. The results show that the CSP hot-rolled sheet has obvious texture gradient in the thickness direction, the Goss texture is the strongest texture component in the surface layer, and the ¼ texture and the center layer are dominated by α texture with some γ Texture. After the normalizing, the overall texture strength of the sample decreased, and with the normalizing holding time extended, the Goss texture strength also gradually reduced; when the normalizing time reaches 120 s, the texture gradient of the sample is obviously reduced, which is unfavorable to Secondary recrystallization development and improvement. On the premise of ensuring the improvement of the organization and the inhibitory effect of the inhibitor, the normalizing time of the CSP hot-rolled sheet should be 30-60 s.