硅钢资料

本发明公开了一种切口耐蚀性良好的无取向硅钢及其生产方法，属于电工钢生产技术领域。本发明的无取向硅钢包括以下质量百分比的元素：Si：0.2～2.7％，Mn：0.15～1.0％、Als：0.5～1.0％，Cr：0.1～0.3％；Ni:0.2～0.5％，P：≤0.01％，其余为Fe及不可避免的杂质。其生产工艺为：铁水预处理、转炉炼钢、真空处理、连铸、加热、热轧、酸洗、冷轧、退火处理和涂覆绝缘层。本发明通过合理的成分配比以及相匹配的生产工艺进行生产，最终得到了切口耐蚀性优良的低铁损、高磁感的无取向硅钢，从而能够有效满足电工钢的使用需求。

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... 

一种增大压下率的电工钢冷轧装置及冷轧方法，属于电工钢冷轧技术领域，该电工钢冷轧装置，包括单机架可逆轧机，单机架可逆轧机的两侧均设置有电磁感应加热装置和氮气风冷装置，氮气风冷装置靠近单机架可逆轧机的轧制进口或入口设置，本发明的有益效果是，本发明通过在单机架可逆轧机两侧增设电磁感应加热装置和氮气风冷装置，对每道次轧制过程中可在线调节电磁感应加热温度，实现了边去应力退火边轧制，保证了正常的轧制工作，达到了高效轧制更薄规格电工钢产品的目的和消化生产CSP热轧超厚过渡坯的目的。

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... 

通过对辉光放电发射光谱参数的优化,以铁元素为内标来消除基体效应,建立了测定硅钢薄板中微量硼元素的方法。优化的实验参数为:放电电压1200 V,放电电流50 mA,预溅射时间40 s,积分时间10 s。校准曲线硼元素含量范围0.0001%~0.022%,相关系数大于0.999,测量结果与认定值一致,相对标准偏差小于10%。完全能够满足日常分析测试的要求。 A glow discharge optical emission spectrometry(GD-OES) method for determining trace boron element in silicon steel sheets were established through optimization of instrumental parameters and using Fe element as an internal standard to eliminate the matrix effect.The optimized instrumental parameters included discharge voltage,discharge current,pre-sputtering time and integration time,which are 1200 V,50 mA,40 s,and 10 s,respectively.The content of boron element that can be determined from the ca... 

本发明公开了一种宽频率低铁损变频电机用无取向电工钢及制造方法，属于无取向电工钢领域。针对现有无取向钢在较宽频率范围内电磁性较差的问题，本发明提供一种宽频率低铁损变频电机用无取向电工钢，包括如下重量百分比的各组分：Si：2.80％～3.50％；Als：0.20％～0.60％；Mn：0.20％～0.60％；P：0.01％～0.20％；C：≤0.005％；S：≤0.02％；N：≤0.02％；Ti：≤0.005％；其余为铁和不可避免的杂质；其中C、S、N和Ti的重量百分比满足下式：C％+S％+N％+Ti％≤0.009％。通过控制合金元素的含量达到电工钢电阻率增加、磁滞伸缩减小，涡流和磁滞损耗均降低的目的。通过本发明提供的制造方法在正火过程中选用低温工艺，改善随着合金元素量的增加金属强度增加、塑性降低、冷加工性能降低的问题，使其最终在较宽频率范围内电磁性能优异。

研究了采用高温卷取热轧态原料和常化态原料生产高牌号冷轧无取向电工钢组织、织构和磁性能。研究发现钢卷采用750℃高温卷取,下线后立即采用\"保温罩\"对钢卷进行保温,时间96h,然后空冷至100℃时上线生产的工艺可取代常化工艺生产高牌号冷轧无取向电工钢。冷轧上线前,热轧态原料的表层为大量的再结晶组织,这部分组织包括了热轧轧制时保留下来的动态再结晶组织,钢卷本身高温回复后产生再结晶晶粒,以及在保温罩内保温时形成的再结晶组织。高温卷取的热轧态和常化态的热轧卷作为原料时,试样织构类型相似,取向分布密度接近,再结晶后织构类型仍然相似,取向分布密度仍然接近。Goss织构对磁性能增加有促进作用。实验钢中较好的磁性能对应的织构[{100}+Goss]/{111}的比值较高,体现了织构的遗传性。 Microstructure,texture and magnetic properties of high grade cold rolled nonoriented electrical steel which made of hot rolled material with high temperature coiling and with normalization were studied.Steels coiled in high temperature(at 750 ℃),stacked with insulation cover for 96hand air cooled to 100 ℃ were using to manufacture high grade nonoriented electrical steel.The process can replace the normalization process.There are a lot of recrystallized grains in the surface layer of the coil wit... 

取向硅钢热轧板中组织、织构梯度对发展完善的二次再结晶十分关键,通过对2种不同热轧工艺生产取向硅钢的组织、织构进行研究,结果表明:采用后道次大压下热轧工艺时热轧板表层再结区晶粒平均尺寸增加,再结晶区厚度增加,高温退火后二次晶粒尺寸减小;采用后道次大压下热轧工艺热轧时,热轧板中平均等效应变高,热轧板厚度心部{100}〈011〉和{100}〈001〉位向取向强度降低,({111}～{113})〈110〉位向取向强度提高,高温退火后{110}〈001〉位向偏离角降低,磁性能提高。 The texture and microstructure gradient in hot rolled grain oriented silicon steel strip was one of the essential factors to achieve a perfect secondary recrystallization.The texture and microstructure of grain oriented silicon steel strip as-rolled with two different hot rolling parameters was investigated.The results show that with big reduction at the end rolling process,the intensity of {100}〈011〉 and {100}〈001〉 orientation reduces with({111}-{113})〈110〉 orientation intensity enhanced in hot...