硅钢资料

基于BOF→RH→CSP生产工艺,研究了RH精炼过程钢中夹杂物类型演变及MgO·Al2O3夹杂物形成规律,同时对MgO·Al2O3夹杂物的形成条件进行了热力学计算,借助CFD数值模拟软件研究了RH精炼过程卷渣行为。研究发现,RH精炼过程20和30 min时,w([MgO])/w([Al2O3])为0.005~0.020,未发现MgO·Al2O3夹杂物;RH出站后夹杂物w([MgO])/w([Al2O3])为0.3~0.5,且RH精炼结束后MgO·Al2O3夹杂物占夹杂物总量的58.4%;另外,RH精炼过程钢液表面速度CFD模拟结果为0.57 m/s,大于临界卷渣速度0.45 m/s,且顶渣成分与夹杂物成分相近,存在卷渣现象。热力学计算表明,钢液与炉渣平衡时钢中w([Al])为0.31%~0.37%,w([Mg])为0.00024%~0.00028%,在MgO·Al2O3生成区域之内。减少RH处理过程卷渣,浇铸过程下渣及控制顶渣和包衬相中MgO质量分数可抑制MgO·Al2O3夹杂物形成。 Based on the practical production of non-oriented silicon steel, the evolution of inclusion type and the formation of MgO·Al2O3inclusion were analyzed in the process of BOF→RH→CSP. The thermodynamic conditions for forming MgO·Al2O3inclusion were discussed and the behavior of slag entrapment of molten steel was also simulated by CFD software during RH refining. The results showed that the value of w([MgO])/w([Al2O3]) was in the range of 0.005-0.020 and no MgO · Al2O3 inclusion was observed at 20 ... 

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 ... 

本申请提供了一种快速判断取向硅钢常化板冷轧脆性的方法，属于取向硅钢材料技术领域，包括常化机组尾部卷取时随机取样，每卷分别在板中间和两侧碎边边丝进行取样，均沿轧向取样，在试样温度为常温条件下，对碎边边丝进行弯曲测试，并记录每条碎边边丝式样的弯曲次数，统计对应取样的钢卷在冷轧工序的脆断情况，将弯曲实验结果与冷轧脆断情况进行对应统计分析，根据常化板边部的试样弯曲次数是否大于或者等于1次，若否，则判定冷轧脆断。通过检测不同常化工艺条件下常化板的反弯次数，再验证不同弯曲次数前提下的冷轧可轧性，找出弯曲次数与可轧性的对应关系，从而确定常化板的最小反弯次数，以此对冷轧脆性进行判定。

本发明属于取向硅钢制备技术领域，具体涉及一种软磁材料取向硅钢退火工艺。所述退火工艺主要包括：涂覆隔离剂、按照一定速率升温后进行保温，以5‑10℃/min的速率进行降温；在降温过程中施加恒定磁场，之后继续降温即可实现。该退火工艺能够有效降低铁损失，提高磁感强度。同时具有较好的耐腐蚀性能和机械性能。

本发明涉及取向硅钢高温连续退火炉领域，尤其涉及一种取向硅钢高温连续退火炉隔离装置，包括安装在炉壳上的隔离炉门及设置在隔离炉门四周的密封井；隔离炉门顶部两侧安装有水冷却装置；水冷却装置上部设有隔离炉门动力牵引装置；密封井包括固定密封井和伸缩密封井，伸缩密封井位于固定密封井内部并与固定密封井滑动连接，伸缩密封井与固定密封井端部连接处设有密封装置。本发明可以确保隔离炉门升降过程中实现无缝全密封状态，提高密封效果，且采用伸缩密封井实际降低了密封井的高度，间接降低了水冷却装置连接管道上升至最高点的净空标高，与传统固定式密封井高度相比可以降低高度50％～80％，从而降低厂房净空标高，节省厂房基建投资。

试验2.3Si无取向硅钢(/%:0.003C,2.30Si,0.16Mn,≤0.020P,≤0.005S,0.54Al)冷轧板由常化和未常化的2.5 mm热轧板冷轧至0.6 mm(压下率76%),经750~950℃2.5 min中间退火后再冷轧至0.5 mm(压下率16.7%),成品板经890℃+960℃2.5 min退火。研究了中间退火温度对该钢晶粒尺寸、织构和磁性能的影响。结果表明,随中间退火温度的升高,二次冷轧前晶粒和成品晶粒增大,成品中不利织构组分{111}和{112}减弱,磁性能得到改善。热轧板经过常化时的磁性能明显好于未经常化时的磁性能,但中间退火温度较高时常化对磁性能的有利作用减弱。 The test cold sheet of 2.3Si non-oriented silicon steel(/%:0.003C,2.30Si,0.16Mn,≤0.020P,≤0.005S,0.54Al) is first cold-rolled from normalized and un-normalizing 2.5 mm hot-rolled plate to 0.6 mm sheet(reduction 76%),then intermediate annealed at 750~950℃ for 2.5 min and double cold-rolled to 0.5 mm sheet(reduction16.7%),the finished sheet annealed at 890℃+960℃ for 2.5 min.Effect of the intermediate annealing temperature on grain size,texture and magnetic performance of the steel has been studied.... 

研究了冷轧大压下量,950℃退火时间对一种新型含铜无取向电工钢晶粒度和织构的影响。结果表明,大压下量冷轧,随压下量的增加,退火晶粒向γ线聚集,形成强{111}<112>织构。提高冷轧压下率,退火织构{111}<100>,{110}<001>强度减弱,增加退火时间,退火织构{111}<110>,{100}<001>,{110}<001>强度变弱。采用87.5%冷轧压下率和950℃退火60 s,有利织构{100},{110}占有率最大。 The effect of annealing(950 ℃) time with high cold rolling reduction on grain size and texture of a new non-oriented electrical steel containing copper was investigated.The results show that for high cold rolling reduction,most annealed grains are oriented along γ-fibre with increasing cold rolling reduction ratio and strong texture {111}<112> is formed.With increasing the cold rolling reduction ratio,the intensity of annealed texture {111}<110>,{011}<100> decreases.With increa... 

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。

利用X-射线衍射织构分析和线形分析技术测定了交叉轧制双取向硅钢在制备工艺各阶段的织构及微结构,进而探讨了立方织构({100}<001>)的形成过程。通过对实验结果的分析可知,二次冷轧和交叉轧制工艺为立方织构提供了内能优势和有利的形变织构,而低温预退火工艺既强化了立方织构的内能优势,又为立方织构的异常长大提供了有利的组织保证,最终在抑制剂(AlN和MnS)的协同作用下,硅钢在二次再结晶退火后形成了强烈的立方织构。 The texture and substructure of the double oriented electrical steels produced by the cross rolling technology during the difference process has been measured by means of the X-ray texture and diffraction peak profile analysis technology,and research the formation mechanism of cube texture,{100}<001>.The results show that the dominances of inner energy and deformation texture were supplied by secondary cold rolling and the cross rolling technology and strengthened by pre-annealing at a low... 

通过对3%Si CGO硅钢进行恒变形速率、不同变形温度下的单道次压缩实验,结合Thermal-Calc软件,金相分析,SEM及EBSD技术,研究了取向硅钢热变形过程中组织和微观织构的变化规律。结果表明:实验钢是在双相区变形,变形后组织主要是铁素体和少量的珠光体。随变形温度的升高,晶粒由长条状变为等轴状,尺寸逐渐变大;CGO硅钢在热变形过程中立方{100}<001>取向是较为稳定存在的。随着变形温度的提高,{111}<110>等取向逐渐转向{110}<1 10>取向,且{110}<1 10>取向逐渐变得锋锐。 3% Si CGO silicon steel was studied at constant strain rate and different deformation temperatures by single-pass compression deformation experiments to reveal the evolution of microstructure and texture during thermal deformation in oriented silicon steel,and the Thermal-Calc software,metallurgical,SEM and EBSD technique was used in the experiment. The results show that experimental steel is deformed at the temperatures of two-phase zone. The microstructure of the deformed steel consists of fer... 

本发明属于硅钢制造技术领域，具体涉及一种改善硅钢热轧板边部质量的加工方法，包括：连铸、铸坯预变形处理、铸坯加热处理和热轧处理；其中，所述铸坯预变形处理包括：在所述铸坯的温度为500～900℃下，对所述铸坯的沿长度方向的两侧壁通过立辊施加压力，直至形变量h为10～50mm；所述铸坯加热处理的加热温度为1100～1200℃，保温时间为4～6h。本发明提供的改善硅钢热轧板边部质量的加工方法，采用铸坯两侧壁的侧压工艺，有效解决了热轧板边部裂纹的缺陷，提高了边部塑性，提高了成材率并降低了生产成本。

观察了取向硅钢极薄带经冷轧至不同厚度,并经过不同工艺热处理后的显微组织及亚结构。结果表明:冷轧压下量越大,显微组织中位错密度越高,冷变形组织越多,等轴晶粒越少;增加冷轧压下量可以使试样的再结晶温度降低,当钢带厚度为0.08 mm时,在650℃退火时就能发生明显的再结晶。 Microstructure and substructure of the grain oriented ultra-thin silicon steel sheets is analyzed,which are rolled down to different thickness and treated with different heat treatment process.The result shows that there are higher dislocation density,more cold deformation structure and less equiaxed crystal grain in microstructure of the steel sheets with more cold rolled reduction.Increase of cold rolled reduction will decrease recrystallization temperature,and when thickness of the steel shee...