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【作者】 卢鹏; ...
2014-03-28 156 5.8

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... 
2014-03-28 189 5.8

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。
2021-03-29 179 6.8

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... 
2013-03-28 186 5.8

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。
2021-10-25 200 6.8

本发明涉及一种含磷高磁感无取向硅钢的生产方法,工艺路线:铁水脱硫-转炉冶炼-RH精炼-连铸-热轧-酸洗-冷轧-连续炉退火-涂层-性能检验-包装,具体步骤包括:1)将钢水冶炼至目标成分后采用连铸方式将钢水铸成坯;2)热轧板坯加热炉均热段板坯温度950~1050℃,终轧温度控制在780~830℃,卷取温度600~680℃;3)酸洗后冷轧,控制冷轧整体压下率80%以上,至成品厚度,增加剪切带组织;4)连续退火炉快速加热段温度设定1000~1150℃,增加有利织构组织形核;均热段温度设定750~830℃,全氮气干气氛保护,退火工艺速度110~150m/min,满足晶粒度8~4级。本发明在减少硅、铝、锰合金添加量的情况下,改善铁损提高磁感性能,提高机械性能。
2021-08-19 201 6.8

本发明公开了一种批量稳定生产高牌号无取向电工钢的方法,包括以下步骤:开卷→加热→水套冷却→水雾冷却→水喷淋冷却→抛丸→酸洗→切边→卷取→使用单机架六辊轧机进行轧制成卷;该方法可实现高牌号无取向电工钢在六辊UCM轧机冷轧后无边裂产生,可将带钢板形值控制在‑5I~+5I,厚度精度控制在±3μm,该方法生产的高牌号无取向电工钢无板形及表面质量缺陷,产品质量良好,可实现高牌号无取向电工钢的批量稳定轧制。
2021-02-23 173 6.8

研究了退火温度对3.1%Si无取向硅钢组织和磁性能的影响规律。结果表明:退火温度从940℃提高至1 000℃,平均晶粒尺寸由98μm增加到145μm,铁损P1.5/50从2.576 W/kg降低至2.408W/kg。随着退火温度的升高,γ不利织构组分强度逐渐降低,{111}〈112〉织构组分强度降低约16%,磁感B50逐渐升高,磁性能水平提高。 The effects of annealing temperature on microstructure and texture and magnetic properties of 3.1%Si non-oriented silicon steel were investigated in this paper.The results showed that,when the annealing temperature increased from 940℃ to 1 000℃,the average grain size of metallographic structure increased from 98μm to 145μm,the iron loss value P1.5/50 decreased from2.576 W/kg to 2.408 W/kg.And as the annealing temperature increased,the strength of the unfavorable texture componentγgrad... 
2022-01-28 217 5.8

本发明涉及无取向硅钢技术领域,尤其涉及一种改善高牌号无取向硅钢冷轧断带的控制方法。按重量百分比计:[Si+Al]≥4.0%;Mn、S含量满足:S≤0.0015,[Mn]/[S]:200~400;1)热轧过程中使用保温罩,热轧轧制时投入边部加热,头尾100米内卷曲温度提高15~30℃;2)常化机组圆盘剪进行边部剪边前增加加热装置,剪切后增加毛刺打磨装置,采用煤气明火加热,保证钢板温度在韧脆转变温度以上;3)圆盘剪间隙满足关系式:ds=(0.15~0.45)d0ds:圆盘剪间隙,μm;d0:常化板板厚,mm;4)常化采用快速加热,控制钢带的预热段升温速度320~380℃/min,机组速度20~30m/min;5)常化工艺后,控制边部小于20μm的晶粒占比在5%以内。有效的减少了冷轧断带的发生,提高成材率1.30%以上,降低了生产成本。
2021-09-13 221 6.8

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... 
2013-04-28 176 5.8

对高牌号无取向电工钢35W300的成品进行了第二次退火,对第二次退火后的成品性能、纵横向磁性能差异和组织变化进行了分析。结果表明,随着第二次退火温度的升高,晶粒长大,磁性能优化。铁损平均值下降0.087 5W/kg,磁感平均值升高0.008T。第二次退火温度为820℃的产品的磁性能能够满足用户使用要求。 The product of high grade non-oriented electrical steel 35W300 was annealed at the second time.Microstructure,the difference of magnetic properties in the vertical and horizontal and were studied.The results show that the grain grew up and magnetic properties optimized with the increase of annealing temperature for the second time.Iron loss average declines in 0.0875 W/kg,magnetic induction average increases 0.008 T.The magnetic properties can meet the requirements of users at the second anneali... 
2013-04-28 193 5.8

取向硅钢常化工序主要采用现场实测带钢温度的方式测定冷却速率,并通过稳定冷却水温、调整冷却水量及喷梁运行数量等方式保证合理的冷却速率,给常化工艺设计和生产带来诸多不便。通过对常化工艺水冷过程带钢的传热分析求解,在建立带钢水冷温度模型的基础上,研究了不同冷却工艺参数对带钢温度及冷却速率的影响规律以及冷却工艺的交互作用结果。结果表明:模型计算结果能够较好地反映取向硅钢在常化水冷过程中的温度及冷却速率的变化,其计算误差为0.80%~4.11%;在特定取向硅钢厚度规格和常化工艺下,随着常化冷却水量及有效冷却长度的增加,带钢水冷温度及冷却速率与呈非线性变化;常化水冷工艺主要通过调控带钢与冷却水之间热交换量和交换时间实现对带钢温度的控制,实际生产中需综合考虑机组速度、冷却水量及有效冷却长度之间的交互作用,选定喷梁投入数量和冷却水量以获得稳定的冷却速率。 The cooling rate of normalization process mainly determined by measuring the grain oriented silicon steel strip temperature on site, and ensures the cooling rate by stabilizing the cooling water temperature, adjusting the cooling water volume and the operation quantity of spray beam, which brings inconvenience to the normalization process design and production. Based on the heat transfer of strip in the water cooling section of normalization process, the water cooling temperature model for the n... 
2022-01-28 228 5.8

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