轧制方式对超薄取向硅钢带性能的影响

采用同步、异步、同步与异步组合等多种轧制方法,将0．30mm厚的取向硅钢带（工业成品）冷却到0．10mm以下,在纯氢气炉中进行再结晶退火。研究了不同轧制方式对硅钢薄带磁性能的影响规律,结果表明,异步轧制可有效地减少轧制道次,并有利于改善硅钢薄带的织构和磁性能。     

形变对无取向硅钢冷轧织构的影响

研究了经常化处理的无取向硅钢[w(Si)=3%]异步冷轧织构随形变量的变化.结果表明,异步冷轧织构随形变量的变化而发生改变,快慢辊侧的织构类型不变,但强度有所不同;随形变量增加,冷轧织构组分逐渐向α织构和γ织构组分聚集;高斯织构{110}<001>组分逐渐减少,反高斯{001}<110>织构组分逐渐增强;{111}<110>织构组分出现最大值;当压下率达到84%时,出现了较强的{001}<120>织构组分.     

剪切变形方式对取向硅钢织构和磁性的影响

采用异步轧制将经过一次正常冷轧和中间退火的０．７５ｍｍ厚的工业取向硅钢板材异步轧至不同的厚度,然后进行工业退火,研究剪切变形方式对板材织构和磁性的影响。结果表明：异步轧制下,作用于差轧区上的剪切应力能够有效地改善板材心部的织构组态,并在板材亚表层附近相对较大的区域内形成了理想的冷轧织构;退火后板材内重新形成了取向集中的Ｇｏｓｓ织构,其磁性均不低于常规轧制。     

轧制条件对冷轧无取向硅钢织构的影响

除钢质的纯净度、夹杂物聚集程度、再结晶组织外 ,织构分布和各组分强度对冷轧无取向硅钢的磁性能 磁感应强度和铁损亦具有显著的影响。从基础理论方面讨论了冷轧无取向硅钢的热轧、终轧温度和层流冷却条件对轧件织构形成的影响及冷轧压下率和冷轧轧制形状参数对其再结晶织构的影响.     

异步轧制取向硅钢薄带的三次再结晶

分别采用常规和异步轧制，将城品工业取向硅钢冷轧至0.10mm以下，对薄带冷轧织构进行测试和分析，在真空或氢气保护下进行高温退火，研究不同工艺制度对三次再结晶薄带磁性能的影响规律，结果表明：异步轧制使得有利于三镒再结晶的｛111｝＜112＞和｛110｝＜001＞组分增强，而有害组分｛100｝＜011＞减弱；相同热处理下，异步轧制取向硅钢薄带的磁性能优于常规轧制；相同工艺条件下随着厚度砬薄，磁感应强度提高。     

异步轧制对二次再结晶取向硅钢磁性能的影响

研究了异步轧制条件下不同厚度的二次再结晶取向硅钢成品的磁性能的变化,找到了硅钢磁性能与成品厚度和异步速比之间的关系.     

无取向硅钢异步冷轧织构沿厚度的演变

对2.2 mm厚常化后无取向硅钢(%:0.004C、3.1Si、0.33Al),以速度比为1.19异步轧制到0.5 mm厚,用取向分布函数(ODF)定量研究了异步冷轧织构沿厚度的变化。结果表明:常化后的无取向硅钢板材沿厚度方向的织构类型发生了明显的变化,中心侧反高斯织构较强,在异步冷轧后继续保持了这种状态,而表层和次表层高斯织构在冷轧后消失;冷轧后板材在快慢辊侧的织构类型没有变化,但强度发生明显的变化;异步冷轧织构沿厚度方向呈非对称分布;反高斯织构在慢辊侧的强度高于快辊侧的强度,{111}〈112〉织构出现中心低两侧高的现象,慢辊侧略高于快辊侧。     

新型冷轧双取向硅钢组织与织构的形成机理

研究了一种新型冷轧双取向硅钢组织与织构的形成过程。这种钢的基本化学成分：Fe-0.054％C－2．84％Si-1.33%Mn。冷轧钢板在1050－1100℃真空退火时进入铁素体与奥氏体两相区，从而借助{001}＜110＞取向铁素体晶粒的稳定性及表面脱碳过程中向奥氏体内的生长而形成表面层极强的{001}＜110＞织构。在随后840℃湿氢气氛的退火过程中表层晶粒随进一步脱碳而迅速长入中心层，在钢板中形成强{001}＜110＞织构的柱状晶组织。该钢的制备过程与连续式工业生产流程相符，因而有广泛的发展前景。     

普通取向硅钢轧制过程中组织和织构的演变

借助电子背散射衍射(EBSD)及ZEISS-200MAT金相显微镜对某钢厂普通取向硅钢(CGO)进行研究,研究结果表明:热轧板组织、织构沿板厚方向存在明显的不均匀性,在热轧板表层及次表层发生再结晶,同时存在强度较高的Goss织构,中心层存在较强的{001}110变形织构。冷轧组织均呈纤维状条带组织,一次冷轧后,热轧板中的Goss织构消失,织构主要为α、γ织构,经中间脱碳退火后,α、γ织构强度减弱,并出现一定强度的Goss织构和利于Goss织构发展的{554}225、{332}113等织构,经二次冷轧后,二次冷轧织构类型与一次冷轧织构一致,但织构强度不同。     

无取向硅钢热轧板的织构

选用不同硅含量的工业用无取向硅钢热轧板作为研究对象,采用X射线衍射Schulz背反射法对热轧板进行了分层织构测量.结果表明,高硅热轧板表层织构以((-1)10)[001]为主,并有少量((-3)31)[5(-5)3],板中心部位以(001)[1(-1)0]为主;低硅热轧板表层含有少量的((-1)10)[(-1)(-1)1]、((-1)10)[(-2)(-2)1]和((-5)51)[11(-1),而板中心部位主要为(001)[1(-1)0]织构,但强度比高硅热轧板低;织构沿厚度方向的分布具有一定的规律性,即表层附近织构以((-1)10)[001]为主,中心处织构以(001)[1(-1)0]为主,只是强度有差异;热轧温度变化时,织构的强弱有明显的变化,热轧温度对不同硅含量热轧板织构的影响是不同的.     

Evolution of Texture in Grain Oriented Silicon Steels

 Goss texture or (110)[100] crystallographic orientation of the grains is typical grain structure of grain oriented silicon steel used for transformer. This type of texture is one of the most important parameters determining the magnetic properties of the laminated steel plates. The formation and growth of Goss texture in three steel samples are investigated. Two of them are prepared under laboratory conditions and one under industrial conditions. The emphasis is put on the effects of hot lamination temperature and time, primary and secondary recrystallization temperatures during cold lamination on developing of the Goss texture in correlation with other texture components. Also in all steel processing stages, the influence of the chemical composition on the occurrence of Goss texture is examined.     

取向硅钢板坯加热温度对热轧及冷轧板织构的影响

 采用取向分布函数及取向线分析方法对取向硅钢高温和低温板坯加热工艺的热轧及冷轧钢板织构进行了研究。结果表明：低温与高温板坯加热工艺的热轧板及冷轧板织构组分有明显不同。低温板坯加热热轧板中{100}<001>及{110}<110>织构较强,但经冷轧后{001}<110>织构最强。     

退火温度和时间对冷轧无取向硅钢组织与织构的影响

针对冷轧无取向硅钢退火工艺的特点,研究了退火温度和保温时间对成分为0.004%C、0.33%Si的冷轧无取向硅钢晶粒组织和织构演变的影响.结果表明:退火后,α线上{100}织构密度明显减弱,取向从{112}〈110〉向{111}〈112〉大量聚集;适当增加保温时间有助于提高{100}〈hkl〉织构,900℃、保温180 s,水冷得到的织构分布比较均匀,{001}面织构占有率比较高.     

Texture Evolution in Ferritic Rolled Ti-IF Steel during Cold Rolling

 Texture evolution of ferritic hot rolled Ti-IF steel was investigated during cold rolling in the reduction from 15% to 85%. It was found that, α fibre intensified monotonously with the increase of the cold reduction, but γ fibre changed in a different way. As the cold reduction was in the range of 15%-35% or 45%-75%, γ fibre intensified. While the reduction was between 35%-45% or 75%-85%, the intensity of γ fibre reduced. γ fibre displayed the maximum intensity at 75% and the highest average plastic strain ratio due to the favorable recrystallization texture was obtained at this point.     

取向硅钢脱碳退火的试验研究

 通过取向硅钢脱碳退火的实验室研究,比较了炉内气氛、退火时间、水温对不同初始碳含量的取向硅钢脱碳效果的影响,结果表明：控制气氛中合理的PH2O/PH2比,适当延长退火时间,保持一定的水温,有助于改善最终的脱碳效果;初始碳含量为0.036%的取向硅钢,试验退火条件下均可获得良好的脱碳效果。初始碳含量为0.051%的取向硅钢,脱碳效果不理想,其较优脱碳退火方案为：炉温825℃、气氛30%H2+70%N2、时间7min、水温60℃。     

Non-Oriented Fe-Si Thin Strip Produced from Grain Oriented Fe-Si Strip by CSR

The grain oriented silicon strip was rolled by cross shear rolling (CSR) and then an-nealed to manufacture non-oriented thin silicon strip of high quality. The recrystallization ofrolled grain-oriented silicon steel into non-oriented silicon steel was studied. For this purpose,CSR is better than conventional rolling, and the higher the mismatched speed rate is, the betterthe properties of the non-oriented thin silicon strip are. The optimum annealing schedule isheating at 1 000 :C for 1 h in pure hydrogen atmosphere added with H2S of O. 001 0 %.     

Texture of Cold Rolled Strip of Fe-3Si Steel Produced by Thin Slab Casting and Rolling

 The hot rolled strip of Fe-3Si steel was experimentally produced by thin slab casting and rolling (TSCR) process in the laboratory. The texture evolution rule was investigated during hot rolling and cold rolling. The texture distribution of cold rolled strips with four kinds of cold rolling reduction schedules was observed through X-ray diffraction method, and the orientation density variation of 1/16 layer, 1/8 layer, 1/4 layer, and 1/2 layer in thickness was analyzed. The cold rolled texture of steel A with four kinds of cold rolling reduction schedules was mainly composed of α and γ fibers. Cold rolling reduction ratio of 70% was more beneficial for obtaining more γ fibers. The γ fiber texture orientation density of {111}<011> and {111}<1 12> was the largest on the 1/8 layer and 1/4 layer and the least on the 1/16 layer and 1/2 layer for steel B. The texture orientation density of {001}-{223}<110> in the α fibers for steel C was increased, but the texture orientation density of {332}-{110}<110> was low.     

冷轧晶粒取向硅钢生产工艺技术的研究进展

根据国际上近年来冷轧晶粒取向硅钢生产工艺技术的发展趋势,着重介绍了取向硅钢二次再结晶机理研究以及生产工艺的最新研究进展。