钢厂
无取向电工钢硫含量控制技术研究
针对采用含钒铁水生产无取向电工钢存在的铁水脱硫率低、转炉冶炼过程回硫量大、成品硫含量偏高的问题,通过对含钒钛铁水脱硫,减少转炉冶炼过程回硫以及RH脱硫技术等方面的研究,大幅度降低了电工钢成品硫含量。生产表明钢中w(S)=0.001 9%~0.006 9%,平均为0.004 2%;w(S)≤0.008%的比例达到了100%,且w(S)≤0.005%的比例也达到了91.43%。 In cognizance of the problems of low desulphurization rate for hot metal,large sulfur-recovery in converter as well as high sulfur content in products in producing non-orientation electrical steel with vanadium-content hot metal countermeasures have been carried out.Sulfur content in non-orientation electrical steel is decreased obviously by way of study on technologies of desulphurization for hot metal with vanadium & titanium,sulfur-recovery control in converter and desulphurization in RH ...
取向硅钢初次再结晶退火工艺正交试验
以试验室模拟CSP工艺生产的Fe-3Si热轧钢带为研究对象,采用正交试验及方差分析的方法,研究了取向硅钢初次再结晶退火工艺对高温退火后获得锋锐的高斯织构的影响。结果表明:取向硅钢两段式初次再结晶脱碳退火工艺参数加热段保温时间及加热温度是高温退火后获得锋锐高斯织构的主要影响因素,其可信度分别在90%和85%以上;在本试验条件下,通过正交试验获得的最佳退火工艺为:冷硬板经600℃保温3 min和850℃保温6 min。 Fe-3Si hot rolled strip was produced by simulating CSP technology in the laboratory.Orthogonal experiment and analysis of variance were carried out to investigate the influence of primary recrystallization on the sharp Goss texture of the oriented silicon steel.The results show that holding time of the heating section and the heating temperature for a sharp Goss texture of the samples annealed has important implications in this experiment conditions,the two-step decarburization annealing process...
铜含量对TSCR工艺生产取向硅钢热轧织构的影响
取向硅钢热轧板中织构梯度对发展完善的二次再结晶十分关键,通过添加铜可以显著降低取向硅钢板坯加热温度,从而影响热轧板织构分布。利用X射线衍射仪,分析了实验室模拟薄板坯连铸连轧(TSCR)工艺的3种不同铜含量的取向硅钢热轧板织构。结果表明:不同铜含量热轧板表面到厚度1/4处均为弱的热轧织构,热轧板心部主要为{100}面织构;铜含量约在0.4%时,热轧板次表层的{110}<001>织构比例最高,而热轧板心部的{100}<110>织构比例最低;铜含量对热轧织构中{114}<110>和{001}<100>织构发展有显著影响。 The texture gradient in hot rolled grain oriented silicon steel strip is one of the essential factors to achieve a perfect secondary recrystallization.The addition of copper can significantly reduce the slab reheating temperature of grain oriented silicon steel,so as to impact the texture distribution in the hot rolled strip.The texture of hot rolled grain oriented silicon steel strip as-rolled by thin slab casting and rolling process(TSCR) in laboratory with three different copper contents was ...
CN202110758995.8一种中温普通取向硅钢及其制备方法
本申请涉及一种中温普通取向硅钢及其制备方法,依次包括加热、除鳞、控制轧制、控制冷却、卷取;加热、控制轧制、控制冷却、卷取过程中分别控制硅钢边部组织类型、边部脱碳宽度、边部晶粒大小,从而降低了后续冷轧工序的裂口率和提高了成材率。本申请提供的一种中温普通取向硅钢的制备方法,通过改善加热炉气氛、优化控制轧制工艺、优化控制冷却工艺以及调整板坯的装钢间距。制备后的硅钢边部硬度明显降低,在后续冷轧工序中,严重裂口率显著降低。
高磁感取向硅钢生产技术与工艺的研发进展及趋势
采用节能、环保、经济型的生产技术与工艺来制造高磁感取向硅钢目前已成为世界各大取向硅钢生产厂的研发热点。总结了国内外各大钢铁企业与研究机构采用低温板坯加热技术生产高磁感取向硅钢的开发及应用情况,概括了传统流程实现低温板坯加热技术的方法。介绍了薄板坯连铸连轧与双辊薄带连铸等短流程工艺生产高磁感取向硅钢的研发现状。在此基础上,探讨了高磁感取向硅钢生产技术与工艺的发展趋势及方向。 Utilizing energy-efficient,environmentally friendly,economic production processes and technologies to manufacture high magnetic induction grain-oriented silicon steel has become the focus of current research work.Based on using low-temperature slab reheating techniques to produce high magnetic induction grain-oriented silicon steel at both iron and steel enterprises and research institutions all over the world,the current application and exploitation was thoroughly generalized;the implementation...
CN202180034717.6方向性电磁钢板
本发明提供一种线状槽的形成图案,其兼得低装配系数化的效果和高磁通密度。在钢板的表面具有多个在横切该钢板的轧制方向的方向延伸的线状槽的方向性电磁钢板中,在上述线状槽相互间的上述钢板的表面形成从该表面凹陷的凹型缺陷,将上述钢板的上述凹型缺陷的体积分率相对于不存在该凹型缺陷的状态的钢板设为0.0025vol%~0.01vol%,以每1m2钢板为30个~200个的频率形成切断上述线状槽的上述延伸的中断部。
新型无取向电工钢在退火过程中组织和织构取向的演变
通过金相分析和电子背散射衍射技术研究了一种新型含铜无取向电工钢在950℃退火不同时间(3~180s)空冷后的组织和织构取向的演变。结果表明:该钢在退火3s时的主要织构为α和γ线织构,{100}<110>织构最强;退火20s时织构以<111><112>、{111}<110>、{112}<110>、高斯织构和立方织构为主,随着退火时间的延长,高斯织构和立方织构强度呈减弱趋势;合理控制保温时间有利于提高{100}、{110}面织构的占有率。 Evolution of microstructure and texture oriented of a new non-oriented electrical steel during annealing at 950℃for different times(3-180) s and air cooling was studied by metallography and electron back-scattering diffraction analysis.The results show that after annealing for 3 s most of the texture oriented alongα-fibre andγ-fibre,the intensity of {100}〈110〉was the strongest.{111}〈112〉,{111}〈110〉,{112}〈110〉,Gauss texture and cube texture were the main texture after annealing for 20 s,with the ...
210 t BOF-RH-CC炼钢过程无取向硅钢XG800WR洁净度的试验研究
两炉次无取向硅钢XG800WR(/%:0.003~0.004C、0.71~0.75Si、0.32~0.33Mn、0.004~0.007S、0.016P)的炼钢流程为铁水预处理(KR)-210 t顶底复吹转炉-钢包吹氩-RH脱碳精炼-230mm×1220 mm板坯连铸。53 t中间包钢水过热度为25~30℃,钢包到中间包采用长水口全程吹氩保护浇铸,中间包至结晶器采用浸入式水口浇铸。结果表明,在RH、中间包、结晶器过程中钢中总氧以及夹杂物数量和尺寸均明显降低;但在钢包到中间包过程T[O]、[N]和钢中夹杂物数量增加,说明长水口浇铸过程存在二次氧化。连铸坯中T[O]、[N]平均他分别为11×10-6和30×10-6,显微夹杂物数量平均为4个/mm2。铸坯中的显微夹杂物主要为3~5μm的AlN,同时存在少量的MnS、Al2O3·AlN和Al2O3·MgO·MnS。 The steelmaking flow sheet for two heats non-oriented silicon steel XG800WR(/%:0.003~0.004C. 0.71~0.75Si,0.32~0.33Mn,0.004~0.007S,0.016P) is hot metal pretreatment(KR)-210 t top and bottom combined blown converter-ladle argon blowing-RH decarburization refining-230 mm×1 220 mm slab casting.The superheating extent of liquid in 53 t tundish is 25~30℃,whole casting is shielded by blowing argon with long nozzle from ladle to tundish and the submerged nozzle is adopted in casting from tundish to mold...
CN202180052321.4取向性电磁钢板的制造方法
本发明的取向性电磁钢板的制造方法能够稳定地制造被膜特性和磁特性优异的取向性电磁钢板。其包括:对含有规定的添加元素的钢坯进行热轧;冷轧制成最终板厚;进行脱碳退火;涂布以MgO为主剂的退火分离剂;进行最终退火,其中,上述退火分离剂的主剂的BET比表面积比率H2O/N2为0.6~1.6且浆料状态下粒径40μm以上的粒子的比例为5质量%以下。
CN202121494829.3一种高精度硅钢片加工用多向定位组件
本实用新型公开了一种高精度硅钢片加工用多向定位组件,包括底板、安装板、橡胶轮组一和橡胶轮组二,所述底板上端两侧对称设置有U型的所述安装板,所述安装板内底端中部安装有安装架二,所述安装架二上安装有所述橡胶轮组二。有益效果在于:本实用新型通过螺杆、调节套、安装架一、安装架二、橡胶轮组一、橡胶轮组二、弹簧以及连接柱的设计,能够实现高精度硅钢片在加工时的有效夹紧定位,避免了高精度硅钢片在加工时的晃动滑移,提高了高精度硅钢片的加工质量,通过电推杆、滑块以及滑槽的设计,能够根据高精度硅钢片的尺寸来调节安装板之间的间距,以满足也不同尺寸高精度硅钢片的加工需求,提高了定位组件使用的灵活性。
CN202111131965.0一种高硅钢的冷轧生产工艺
本发明公开了一种高硅钢的冷轧生产工艺。该生产工艺属于机械制造技术领域,其中的处理工序的加热工序通过电磁感应加热装置加热,待处理钢经过加热工序的速度为30‑200mpm,加热工序的加热温度为70‑120℃。本发明具有生产效率高和生产质量高的特点,特别是在加热工序中对待处理钢采用电磁感应加热装置进行加热,使其可以快速有效地提升温度,以满足高硅钢的冷轧生产工艺要求,减少断带事故,具有很好的实用性和创新性。
高温退火气氛对硅钢表面硅酸镁底层形貌的影响
对取向硅钢在不同气氛下的高温退火工艺进行实验室模拟,利用X射线衍射仪(XRD)分析了硅钢退火至900℃和1170℃时的样品表面氧化层和底层的物相组成,采用场发射扫描电镜(SEM)观察了样品表面氧化层和底层在截面方向上的微观形貌特征,并计算了高温退火一次升温阶段氧化反应的吉布斯自由能以及900℃时退火气氛的氧分压。结果表明:当退火气氛的露点温度保持一定时,较高的氢气含量有利于生成完整连续的底层;当退火气氛的水氢分压比保持一定时,在露点温度与氢气含量两者较低的条件下,底层附着性不佳易脱落,较高条件下,底层中夹杂着较多的铁单质;当氧化层中无FeO时,底层完整连续但易脱落,当FeO层较薄时,底层下方存在部分未反应的SiO2,当FeO层较厚时,底层不完整连续且有分层。 The high temperature annealing process of grain-oriented silicon steel in different atmospheres was simulated in the laboratory. X-ray diffractometer(XRD) was used to analyze the phase compositions of the surface oxide layer and forsterite film of the silicon steel annealed to 900 ℃ and 1170 ℃. Field-emission scanning electron microscopy(SEM) was used to observe the micro morphology characteristics of the surface oxide layer and forsterite film of the samples in the cross section direction. The ...

