共查询到20条相似文献,搜索用时 76 毫秒
1.
薄板坯连铸连轧流程试制取向硅钢抑制剂的析出特点 总被引:1,自引:0,他引:1
在实验室模拟薄板坯连铸连轧流程试制取向硅钢的基础上,通过大量的透射电镜观察和分析检测,得到了脱碳退火后钢中形成的析出物的情况,确定了钢中的主抑制剂为Cu2S,同时还存在少量的辅助抑制剂AlN以及以复合析出物形式存在的微量的MnS。研究了Cu2S主抑制剂在薄板坯连铸连轧流程生产取向硅钢的析出特点,分析了实验用钢中Cu2S抑制力。结果表明,Cu2S作为薄板坯连铸连轧流程生产普通取向硅钢的主抑制剂有足够的抑制能力,能够满足CGO钢二次再结晶的要求。 相似文献
2.
3.
4.
5.
6.
介绍了薄板坯连铸连轧工艺生产无取向硅钢和取向硅钢的工艺特征。重点比较了这一新工艺与传统工艺的不同点。指出了薄板坯连铸连轧工艺生产硅钢具有天然的优越性。 相似文献
7.
介绍了薄板坯连铸连轧工艺生产无取向硅钢和取向硅钢的工艺特征.通过试样分析和对比工艺条件,研究了这一新工艺与传统工艺生产硅钢的不同点.指出了薄板坯连铸连轧工艺生产硅钢具有的优越性. 相似文献
8.
9.
利用光学显微镜、TEM和EPMA对双辊薄带连铸3.2%Si高强无取向硅钢组织和析出相形态进行了研究。结果表明,双辊薄带连铸无取向硅钢中主要存在的析出相粒子为AlN和AlN与MnS的复合相,复合析出相数量最多,其次是AlN,独立析出的MnS数量极少;析出相粒子尺寸相差很大。800℃退火时,350 nm大小的AlN和MnS复合相粒子会对晶界产生钉扎作用,阻碍晶界的移动; 900~1 000℃退火时,400~500 nm大小的AlN和MnS复合相粒子对晶界的钉扎作用明显减弱。随着退火温度的升高,无取向硅钢中的析出相粒子尺寸明显增大,有利于产品的磁性能。 相似文献
10.
研究了含铜低碳低硅无取向电工钢中的析出相及其析出机理.由能谱(EDS)及选区电子衍射(SAED)分析可知,铁素体基体上存在的大量弥散分布的等轴状析出相为类B2结构的铜.这些铜析出相的析出机理可以是一般析出、位错析出、台阶机理相间析出和弓出机理相间析出:一般析出在550、650和750℃三个等温温度均可发生;位错析出只发生在较低的等温温度(550℃),此时析出相呈特殊的平行短列状;台阶机理相间析出也可在上述三个等温温度下发生,但650℃等温时最有利于台阶机理相间析出,此时析出相平直列状分布;弓出机理相间析出只发生在较高的等温温度(750℃),析出相弯曲列状分布. 相似文献
11.
Si-qian Bao Yang Xu Gang Zhao Xiang-bin Huang Huan Xiao Chuan-long Ye Na-na Song Qing-ming Chang 《钢铁研究学报(英文版)》2017,24(1):91-96
A grain-oriented silicon steel strip with AlN as main inhibitor was produced by thin slab casting and rolling (TSCR) process.The microstructure, texture and precipitates of the hot-rolled strip were investigated by use of optical microscope (OM), X-ray diffractometer, transmission electron micro-scope (TEM) and energy dispersive spectroscope (EDS).The result shows that the microstructure and texture exhibit a through-thickness gradient similar to that of the hot-rolled strip produced by con-ventional high-temperature slab-reheating process;the preferred orientation varies from{110}<001>in the surface layer to{001}<110> in the center layer, and the Goss texture with a maximum inten-sity mainly concentrates on the surface layer.In addition, some other texture components, for ex-ample rotated Goss texture, form in the 1/4 thickness layer, which are not observed in the hot-rolled strip produced by conventional high-temperature slab-reheating process.The precipitates in the hot-rolled strip are mainly (Mn,Cu)S and AlN compound particles with dimension of 100-200 nm, and the fine precipitates are significantly less than that in the hot-rolled strip produced by conven-tional high-temperature slab-reheating process.Moreover, the areal density of the fine precipitates in the center layer is more than that in the surface layer. 相似文献
12.
热轧带钢无头轧制技术诞生于常规热轧宽带钢轧机,之后有一批薄板坯连铸连轧产线采用半无头轧制技术,但由于轧制机理及其他方面的局限性,不能认为是一个理想的工艺产线.近几年国外两套以原有ISP(在线带钢工艺)型式的薄板坯连铸连轧产线为原型进行了无头轧制改造,特别是意大利阿维迪无头轧制产线的构成及特点,揭示了无头轧制技术发展的某些特征.国内薄板坯连铸连轧最多的是CSP产线,以国内某套一代半的CSP机组迁建项目为例,对改造成无头轧制产线进行技术分析,提出改造的设想方案及改造的效果预期.未来热轧带钢无头轧制技术的发展前景取决于在技术性、经济性及适用性方面的竞争力. 相似文献
13.
14.
介绍了武钢转炉-薄板坯连铸连轧工程的立项背景及特点,该工程引进西马克CSP生产线,采用了许多先进设备和先进技术,产品定位于硅钢等高级别钢种,是1项高效低耗节能的工程,可以与武钢其他热轧厂实现优势互补。 相似文献
15.
介绍了唐山国丰钢铁有限公司转炉—中薄板坯连铸连轧厂的设计技术特点;阐述了这些特点带来的紧凑、连续、节约、高效和产品尺寸精度高等技术经济优越性;提出了窄带钢生产线技术升级换代的一种较好的参考模式。 相似文献
16.
17.
采用无抑制剂法制备取向硅钢,并采用XRD、TEM等方法对无抑制剂取向硅钢热轧到初次再结晶阶段的织构与析出物进行了研究。实验结果表明,热轧板的织构主体为γ线织构,并含有少量的立方织构{100}001和Goss织构{110}001;常化后立方织构{100}001减弱,织构的主体为γ线织构;初次再结晶退火后织构主要由γ线织构及少量的α线织构组成。通过对第二相质点的观察发现,析出物主要由铁的氧化物和硅的氧化物组成,均不是抑制剂,说明该取向硅钢并不是依靠第二相质点来抑制初次再结晶晶粒长大的。 相似文献
18.
Grain-oriented electrical steel is mainly used as the core material in electrical transformers, and its magnetic properties are closely related to the sharpness of Goss texture formed by secondary recrystallisation during high-temperature annealing. However, the mechanisms of abnormal Goss grain growth are still disputed in the literature. In this paper, grain-oriented silicon steel strips with AlN as main inhibitor were produced by thin slab casting and rolling process, and the evolution of microstructure and texture during high-temperature annealing was investigated. Moreover, the mechanisms of secondary recrystallisation were further discussed. The results show that secondary recrystallisation is actually a multi-stage process, and different mechanisms are at work at different stages. Coincident site lattice grain boundaries play an important role at the early stage of secondary recrystallisation, however, the role of high-energy grain boundaries and solid-state wetting should be more important at the later stage of secondary recrystallisation. 相似文献
19.
概略介绍两种主要流程ISP和CSP的自动化系统及其在意大利Cremona厂和美国Crawfordsville厂的应用。最后还介绍了AEG公司的带炉卷轧机的薄板坯连铸连轧自动化系统。 相似文献