【作者】 杨华；

【导师】 李长生；

【作者基本信息】 东北大学 ， 材料加工工程， 2008， 硕士

【摘要】 本文在国内外薄板坯连铸连轧技术发展的基础上,综述了取向硅钢的生产现状和国内外学者的研究成果。通过在实验室条件下模拟薄板坯连铸连轧生产Fe-3%Si钢带的试验研究,对Fe-3%Si钢带热轧、常化及冷轧等不同工艺条件下的织构进行了测试与分析,主要研究工作如下：(1)热轧2#试样和3#样的EBSD结果表明,热轧板材由表面至中心形成织构梯度,过渡层中存在{110}<001>织构,中心层存在{001}<110>、{112}<110>等织构。织构取向密度随着压下量的增加而逐渐增大,当总压下量达到97.1%时,存在{110}.<001>、{110}<112>和锋锐的{001}<110>织构。(2)热轧4#试样和5#试样的织构取向密度分析表明,中间道次压下率对γ纤维织构和e纤维织构影响很小(高斯织构基本相同),而对α纤维织构影响较大。(3)热轧3#、6#两种不同化学成分试样由表面至中心织构梯度近似,与Hi-B钢织构分布接近；γ取向线上,{111}<112>织构的取向密度大于{111}<011>织构的取向密度。(4)冷轧织构主要由α(<110>//RD)和γ(<111>//ND)组分构成,当总压下量为59.2%和70.5%时,γ纤维织构逐渐增多。总压下量达到79.7%和84.3%时轧制道次过多,导致γ纤维织构逐渐减弱。(5)从冷轧13#试样与热轧3#试样的织构对比可以看出,冷轧织构分布基本继承了热轧织构分布,但α、ε和γ纤维织构发生了改变：α纤维织构从{001}<110>向{223}<110>、{111}<110>转变；￡纤维织构向{111}<112>转变；γ纤维织构取向密度都在增大,{111}<011>取向密度受α纤维织构转变影响较大。(6)从冷轧14#试样与热轧6#试样的织构对比可以看出,冷轧后α纤维织构向{111}<110>转变,H/4处￡取向线上{111}<112>织构的取向密度最大,中心层的γ取向线上{111}<011>织构取向密度最大。更多还原

【Abstract】 This paper reviews the situation of internal and external research results and development about the exploitation of grain oriented silicon steel with the process based on the status of the technology of continuous casting and rolling. The texture of hot rolling, normalizing and cold rolling on Fe-3%Si grain oriented silicon steel are tested and analysised throughout simulating thin slab continuous rolling process to produce oriented silicon steel in the lab.The following general conclusions based on the results of this work can be drawn.(1) The EBSD results of hot rolled sample 2# and 3# showed that texture gradient exists from surface to center.{110}<001> orientation exists in transition Layer and{001}<110>, {112}<110> orientation exists in center. When the reduction is 97.1%,{110}<001>、{110}<112> and sharp{001}<110> orientation exist in the sample.(2) Analysis on texture density of hot rolled sample 4# and 5# showed that the intermediate reduction had less effect onγand e (GOSS orientation is similar) fiber thanαfiber.(3) There were similar texture gradient for hot rolled sample 3# and 6# with different chemical compositions. The samples had similar texture distribution to HiB steel.f Hi-B steel. The density of{111}<112> orientation was higher than{111}<011> on y fiber.(4) The cold rolled texture was composed by a (<110>//RD) andγ(<111>//ND) fiber.When the total reduction was 59.2% and 70.5%, texture on y fiber inceased gradually.. When the total redution was 79.7% and 84.3%, texture on y fiber decreased gradually because of the excessive processes.(5) The samples 13# and 3# showed that the cold rolled texture inherit the distribution of hot rolled texture, but the texture ofα,εandγchanged:αfiber changed from {001}<110> orientation to{223}<110> and{111}<110> orientation. Theεfiber transformed to{111}<112> orientation. On Y fiber, all the texture density increased andαfiber effected greatly on texture density of{111}<011> orientation.(6) The cold rolled sample 13# and 3# showed that after cold rolling, {001}<110> orientation transforms to{111}<110> orientation.on a fiber.. Onεfiber, the density of{111}<112> orientation of H/4 layer in sample 14# was the highest in the layers, Onγfiber, the density of{111}<110> orientation of H/2 layer in sample 14# was the highest in the layers.更多还原