硅钢资料

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。

本发明涉及一种防止低温加热取向硅钢热轧边裂的方法，包括：1)控制取向硅钢铸坯进入加热炉前的表面温度；2)控制加热段各段炉气温度；3)二加热段采用加速加热；4)控制总加热时间；5)控制出炉温度；6)控制精轧道次及侧压量；7)控制精轧道次及终轧温度；8)精轧前对钢带边部进行加热补偿。本发明通过合理制定取向硅钢的加热温度、加热时间和轧制工艺制度，避免或消除了低温加热取向硅钢热轧边裂问题。

本发明公开了一种新能源汽车驱动电机用低铁损高强度无取向电工钢及其制造方法，所述无取向电工钢的化学成分及重量百分比包括C：0.001‑0.005％、Si：2.4‑3.0％、Mn：0.25‑0.5％、Al：0.70‑1.10％、P：≤0.02％、S：≤0.005％、0.015％≤Ce+Sn≤0.035％，余量为铁和不可避免的杂质，本发明通过加入Ce和Sn，净化钢质、微合金化提高无取向电工钢强度和磁性能，不需要添加固溶金属元素，且避免了高Si体系下的轧制困难问题，且不需要高温退火，解决了退火温度过高使晶粒异常长大，晶粒尺寸均匀性降低的问题，生产出的无取向电工钢具有较高强度的同时，还具有优良的磁性能。

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... 

【作者】 卢鹏； ...

根据新日铁、JFE及浦项等国外钢铁公司2008年以来在日本专利局、欧洲专利局(EP)及世界知识产权组织(WIPO)申请公开的有关生产Hi-B取向电工钢典型专利技术,概述了近年来国外大型钢铁企业采用低温板坯加热(坯加热温度<1 280℃)技术生产Hi-B取向电工钢主要技术重点,即将调节关键化学成分Al、N、Sn及Sb等与工艺改进相结合。最后介绍了国外大型钢铁企业采用低温板坯加热技术生产Hi-B取向电工钢实例。 The latest developments on technology for manufacturing Hi-B grain oriented electrical steel sheets developed by Nippon Steel Corp.,JFE Steel and POSCO were described according to the patents published by World Intellectual Property Organization,Japan Patent Office and European Patent Office over the recent years.The low temperature slab heating process(particularly slab-heating temperature<1 280 ℃) together with suitably adjusting key chemical elements such as Al,N,Sn and Sb elements was the... 

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. 

本发明涉及一种含磷无铝高效无取向硅钢生产方法，生产方法取消常化工艺，具体步骤如下：1)将钢水冶炼至目标成分后，浇铸成坯；2)板坯热装，热装温度≥500℃，热轧板坯加热炉均热段板坯温度1150～1200℃；终轧温度控制在860～930℃，卷取温度700～800℃3)酸洗后冷轧，控制冷轧整体压下率80％以内，至成品厚度；4)连续退火炉快速加热段温度设定1050～1180℃，增加有利织构组织形核，均热段温度设定830～950℃，全氮气干气氛保护，退火工艺速度120～150m/min，满足晶粒度8～4级。本发明不需进行热轧卷常化处理，降低了制造成本。

研究了常化对CSP流程生产的wSi=1.6%的无取向电工钢组织、织构和成品磁性能的影响。结果表明,经CSP流程生产,且在相同的冷轧及退火制度下,经1 000℃×2min常化处理的wSi=1.6%的无取向电工钢热轧板,其最终退火成品的铁损P15/50比不常化试样下降了10.5%,磁感B50比不常化试样提高了2.5%;常化使wSi=1.6%的无取向电工钢成品的平均晶粒尺寸增大,成品铁损P15/50相应减小;同时,常化使wSi=1.6%的无取向电工钢成品中高斯织构的强度增加,γ纤维织构的强度减弱,这有利于成品磁感B50的提高。 The effect of normalizing on microstructure,texture and magnetic properties of non-oriented electrical steel with wSi=1.6% produced by CSP process was investigated.The results show that,under the same cold rolling and annealing system,the iron loss(P15/50) of annealed samples whose hot bands has been normalized by 1 000 ℃×2 min process decreases by 10.5% and magnetic induction(B50) increases by 2.5% compared with the samples whose hot bands was not normalized.The average grain size of non-orient... 

本发明涉及电磁钢板技术领域，尤其涉及一种免涂层高碳高强耐蚀电磁钢板及其生产方法。所述电磁钢板按重量百分比计，包括如下组分：C为0.010％～0.150％，Si为1.30％～2.50％，Mn为0.50％～1.50％，P为0.04％～0.15％，S≤0.015％，Cr为0.10％～1.50％，Cu为0.2％～0.6％，Al为0.10％～1.50％，Sn为0.02％～0.10％，Ni≤0.0050％，Nb≤0.0050％，Ti≤0.0050％，N≤0.0050％，V≤0.0050％，其余为Fe和不可控残余元素。所述钢板生产方法包括如下步骤：1)板坯浇铸；2)板坯连轧及卷曲；3)热轧卷酸洗及冷轧；4)罩式退火；5)钢卷矫直或拉矫。本发明所生产专用产品在电磁性能相近情况下，强度进一步提升、耐蚀性能提高、生产流程缩短、生产难度下降，减少了涂层工序，降低了生产成本，同时不同盐雾试验锈蚀减少85％以上。

对无取向硅钢炼钢全流程钢液增钛的原因进行了分析,认为铁水钛含量、转炉出钢温度、转炉下渣量、精炼渣TiO₂含量、钢水罐及RH浸入管混钢种生产是影响钢液增钛的主要原因。通过采取低钛铁水冶炼,减少转炉下渣量,提高出钢温度,添加白灰改质精炼渣等措施,均能够降低钢液中的钛含量。 After analyzing the causes leading to increased content of titanium in molten nonoriented silicon steel during whole steelmaking process, it was concluded that such factors as content of titanium in hot metal, tapping temperature from converter, quantity of roughing slag entered into the ladle from converter, content of TiO₂ in refining slag, molten steel ladle car,carrying out the steelmaking of different steel grades by the same ladle and same RH immersion tube were the main causes ... 

利用场发射电镜及能谱仪研究了取向电工钢薄、厚板坯铸锭中不同区域的析出相差异,确定了MnS、AlN及Fe3C的析出顺序和形貌特征。结果表明AlN以先析出的MnS为形核核心,形成粗大微米级的复合析出相。针状Fe3C既可以在复合析出相表面形成也可以在基体中单独出现,主要受冷却速度的影响。在1250℃保温1～2 h,AlN、Fe3C均可完全回溶,但部分MnS仍不回溶。MnS尺寸随着保温时间延长而增大。导致热轧板中沿轧向分布的粗大MnS,减弱了粒子钉扎力。 Precipitates in thin and thick slabs of electrical silicon steel were investigated by means of field emission SEM and EDS analysis.The precipitation sequence and the morphology of MnS,AlN and Fe3C particles were identified.AlN particles are observed to be nucleated on surface of MnS forming micron-meter-sized complex particles.Acicular Fe3C can precipitate on surface of the complex MnS/AlN particles or directly from matrix depending on cooling rate of the slabs.After holding at 1250 ℃ for 1-2 h,...