硅钢资料

介绍了CSP工艺生产无取向电工钢各工序的设备特点、采用的工艺控制手段和电工钢产品质量情况,结合生产实践证明了马钢CSP工艺开发的无取向电工钢产品丰富了薄板坯连铸连轧的品种结构,发挥了薄板坯连铸连轧生产无取向电工钢性能均一、稳定的特点。 The equipment characteristic,the process control method and the quality of non-orientated silicon steel by CSP process were introduced.Combined with the production situation,it is proved that production of non-orientated silicon steel developed on Masteel CSP line would enrich product structure of thin slab continuous casting and rolling,and it exerts stable performance of non-orientated silicon steel. 

本文以热轧常化板为初始材料,采用二次冷轧法与三次冷轧法制备了0.1 mm厚的取向硅钢薄带,测定相应的磁性能,并通过EBSD取向成像技术检测了二次冷轧法与三次冷轧法各工艺过程中织构与组织演变规律。结果表明,采用最终冷轧压下率适中的三次冷轧法,能在冷轧至0.1 mm时保存较多的高斯晶核,使得高温退火后的磁性能明显优于二次冷轧法。最终冷轧压下率通过影响脱碳退火后样品中的{111}<112>织构组分及Goss晶粒数量对最终二次再结晶产生重要影响。 Grain-oriented silicon steel sheets with a thickness of 0. 1 mm were produced from hot-rolled and normalized sheets by two-step-rolling and three-step-rolling methods. Their magnetic properties were measured,and the textures were detected by EBSD technique. The results show that the three-step-rolling method,which has a moderate reduction rate of final cold rolling,can maintain more { 110} < 001 >nucleus,and thus obtaining better magnetic properties compared with the two-step-method. The f... 

本发明公开了一种适宜缠绕式加工的低铁损无取向硅钢及其生产方法，属于硅钢生产技术领域。本发明的无取向硅钢包括以下质量百分比的元素：Si：1.5～2.5％，Mn：0.15～1.0％、Als：0.5～1.5％，其余为Fe及不可避免的杂质。其生产工艺步骤为：铁水预处理、转炉冶炼、真空处理、连铸；加热热轧；常化处理；冷轧、退火；保温、冷却；涂覆绝缘层。本发明通过对无取向硅钢的组分及其配比，结合工艺操作进行优化，能够生产得到电磁性能及延伸率均优异的无取向硅钢，从而能够有效满足电工钢缠绕式加工及使用需求，且其制造工序流程短、成本相对较低。

冷轧中中低牌号的无取向硅钢多采用万能凸度轧机(Universal crown mill,UCM)生产,其板形好坏受制于UCM轧机板形调节手段的协调使用。为掌握UCM轧机的板形控制特点,建立基于二维变厚度有限元的辊系弹性变形和基于三维差分的轧件塑性变形的六辊轧机耦合模型,对UCM轧机的板形调控性能进行详尽的分析,包括工作辊和中间辊弯辊、中间辊窜辊的调控功效、辊间接触压力分布等。在此基础上,提出可用指导生产的板形控制策略,指出UCM轧机在横向厚差控制方面的不足。针对工业生产中UCM轧机轧制无取向硅钢横向厚差大的问题,在大量仿真计算的基础上,开发具有高次曲线函数的边部变凸度(Edge variable crown,EVC)的工作辊。采用该工作辊后,各种品种的无取向硅钢的横向厚差不大于10μm的百分比由24%提高到99%,横向厚差的均值小于6μm,远小于之前的13μm。 Medium-low grade non-oriented silicon steel is rolled often by universal crown mill(UCM) during cold rolling.Its shape quality is dependent on the coordinated control of several shape adjustment devices of UCM.In order to understand the shape control characteristics of UCM,coupling model of six-high rolling mill,based on two-dimensional varying thickness finite element rolls elastic deformation model and three-dimensional finite difference strip plastic deformation model,is setup for the detaile... 

结合冶炼无取向硅钢的生产实际,对钢中硫的来源,以及炉渣性质、钢水温度、底吹强度对脱硫的影响进行了分析。研究表明,转炉钢中硫的主要来源为铁水、废钢、铁水渣及石灰带入;冶炼硅钢时,终渣碱度为3.0~3.5,w((FeO))≤20%,终点钢水温度大于等于1 680℃,加大底吹搅拌强度能提高转炉脱硫效果。硅钢平均出钢硫的质量分数为0.004 8%,能满足无取向硅钢对硫含量的要求。 With the actual production of non-oriented silicon steel,the source of sulphur and the effect of metallugic parameters like slag properties,temperature of molten steel and bottom stirring on desulphurizing ability were investigated.The results show that the main source of sulphur is molten metal,scrap,the remaining slag volume in hot metal and lime.The degree of desulphurization for smelting silicon steel can be increased through adopting the following measures,such as the basicity of finishing ... 

为开发高效电机用冷轧无取向电工钢,借助实验室薄板坯连铸连轧模拟设备及扫描电镜、透射电镜等检验手段研究了成分、组织、织构和析出物等对无取向电工钢磁性能的影响规律;结果表明:常化处理使组织均匀化并增加有利于磁性提高的织构组分;采用CSP流程开发的高效电机用无取向电工钢铁损平均值3.4 0 W/kg,磁感≥1.68 T。 In order to develop electrical steel for high efficiency motor,effect of components,microstructure,texture and precipitation on magnetic property of electrical steel are analyzed.From the result,normalizing treatment makes microstructure uniform and increases component of favorable texture.Iron loss of electrical steel developed by CSP line is 3.40W/kg and magnetic induction is more than 1.68T. 

本发明公开了一种宽频率低铁损无取向电工钢及其制备方法，属于无取向电工钢生产制造技术领域。它从电工钢表面向内依次包括0.005mm～0.1mm的渗透层和钢材内芯；所述渗透层是由硅原子向电工钢内渗透形成，渗透层中的硅元素含量为3wt％～8wt％；所述钢材内芯包括2.0wt％～5.5wt％的硅元素和不少于93.2wt％的铁元素。本发明能保证无取向电工钢具有低频低铁损性能同时有效降低高频条件下的铁损，具体铁损性能为：铁损P1.5/50≤2.35W/kg，铁损P1.0/400≤13.8W/kg。

本发明涉及一种冷连轧法生产无取向高硅钢的方法，RH真空脱碳处理后，铝脱氧及部分铝合金化，合金化后大罐钢水净循环大于3次或大于5分钟；熔炼合格钢水至连铸开浇前静置时间大于二十分钟；控制过热度5～15℃；采用电磁搅拌，控制等轴晶比例45％以上；3)热轧工序板坯装炉温度大于750℃；常化使晶粒尺寸在90～110μm范围内；连续退火炉加热段温度设定950～1150℃，均热段温度设定900～1050℃，全氮气干气氛保护，控制晶粒尺寸120～170μm。生产全过程中的热履历参数控制，充分发挥设计的微合金元素功能，改变析出物的组成、大小、形态及分布。

本发明公开了一种无取向电工钢清洗工艺，包括以下步骤：1)在脱脂剂箱体中添加脱脂剂溶剂，通过喷射泵将脱脂剂分别从上下两路管道喷出，经过流量控制电磁阀进入喷射梁，通过喷嘴喷洒在带钢表面；2)带钢轧制后温度为100～150℃，速度为600～1000m/min，带钢表面高温确保脱脂剂与带钢表面残留油脂反应充分，且在高速下喷射的脱脂剂与带钢相向而行，使带钢表面反应后残留硅泥、铁粉被迅速带走；3)喷射后的脱脂剂流入收集槽中，通过泵重新打入脱脂剂箱体中，实现脱脂剂的循环利用。其利用轧制时产生的高温及高速对带钢表面残留乳化液斑迹、铁粉、硅泥进行清洗，清洗彻底高效。

根据相关的取向电工钢典型专利技术,概述了日本高磁感低铁损取向电工钢低温板坯加热、抑制剂合理调节、关键成分Mn、C、Sn和Sb调节与利用、新型退火剂和绝缘溶液的制备及细化磁畴等生产工艺最新动态和进展情况,并提出了国内企业申请取向电工钢专利时应当借鉴之处。 According to related typical patent technology for grain-oriented electrical steel sheets,the recent trends and progress situation for production process of grain-oriented electrical steel sheets with high magnetic flux density and low core loss in Japan are summarized including low temperature slab heating,suitably regulating inhibitors,adjusting and utilizing key element Mn,C,Sn and Sb,manufacturing for new annealing agent and insulating solutions,and fining magnetic domain,and some suggestion... 

本发明公开了一种适应高频率工况下低铁损无取向电工钢及其生产方法，所述生产方法包括以下步骤：钢水连续浇铸成板坯—热轧—正火—酸洗—冷轧—连续退火—涂绝缘涂层并固化；所述冷轧步骤中，采用六辊单机架往复式轧机经5道次一次冷轧至目标厚度，冷轧过程中前三道次采用变速异步轧制方法，使钢板表层在剪应力作用下位错密度增加，这样在退火后表层晶粒尺寸细化而心部晶粒粗大，通过本发明的方法可生产得到心部为粗大等轴晶粒，表层为纳米级细等轴晶粒的电工钢产品，该产品的铁损P1.5/50≤2.35W/kg，P1.0/400≤14.0W/kg。

对冷轧无取向硅钢在冶炼过程中各个工序的顶渣进行了检测,分析了顶渣变化原因,并得出结论:硅钢生产宜采用复吹转炉,以降低吹炼终点渣中TFe含量,进而减轻对精炼的压力;使用低S、低Al2O3含量中间包覆盖剂;RH脱氧及合金化顺序采用先加硅铁后加铝;首罐宜经LF提温并降低渣中TFe。 The top-surface slag used for the various production processes in smelting coldrolled non-oriented electrical steel is tested and based on tested results the cause of the top surface slag change is analyzed.So it is concluded that the combined blown converter is more suitable to be used for smelting electrical steel in order to reduce the content of TFe in slag at blow end point and then much better results can be achieved during the period of refining.Secondly the tundish flux contenting low co...