共查询到19条相似文献,搜索用时 335 毫秒
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近年来,随着新能源汽车的开发、应用和生产,各种恶劣服役环境下对于驱动电机的工况要求越来越严格。作为驱动电机核心材料的高牌号无取向电工钢,在轻量化、低损耗和无噪音的要求下应具有高磁感、低铁损及高强度特性。文中比较了国内外新能源汽车用高牌号无取向电工钢的性能,总结了当前业界人员对高牌号无取向电工钢磁性能优化及力学性能提升的研究。认为优化合金成分、净化钢液、改进轧制退火工艺及成品厚度减薄是当前磁性能优化的主要方式,以微量Mn、Ti代替昂贵的Ni作固溶元素,或用析出强化的方法添加合金元素Nb、B、Cu,退火时控制再结晶程度为60%~90%,是改善电工钢力学性能最有经济效益的途径之一。 相似文献
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采用连续退火和井式退火两种消应力退火工艺生产35SW440牌号的爱泼斯坦方圈样,并对不同消应力退火工艺与组织、析出及磁性能之间的关系进行了比较研究。结果表明:一次退火板经消应力退火后铁损明显降低,磁感增加。与井式退火工艺相比,连续退火工艺生产的铁心在高磁密条件下磁性能较差,主要原因是带钢表面出现了明显的表面渗氮现象。表面渗氮源于其保护气氛、退火工艺设计不合理,形成大量细小弥散的AlN析出物。AlN析出物通过影响磁畴壁和磁矩运动,恶化磁性能。井式退火工艺由于有效控制了带钢表面渗氮,显著降低了电工钢片高磁密下铁损值,使成品铁心性能指标得到改善。 相似文献
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近年来,在节能减排背景之下,国内外众多研究者对无取向电工钢磁性能的提升做了大量研究。为了探索无取向电工钢磁性能提升的方法,对锡或锑对无取向电工钢磁性能的作用机制(晶粒尺寸和晶体织构的控制)进行分析。基于该作用机制,介绍锡或锑的添加对无取向电工钢磁性能的影响。经研究发现,适量的锡或锑在晶界偏聚,不会阻碍晶界的移动并且致使晶粒尺寸降低;与此同时,锡或锑在晶界偏聚不仅抑制{111}织构在原始晶界处形核及生长,还降低(100)晶粒表面能,促进(100)晶粒生长。因此,适量添加锡或锑,可使无取向电工钢铁损下降、磁感提升。最后结合生产工艺,建议无取向电工钢的研究方向应为稀土含量对高牌号无取向硅钢夹杂物尺寸和数量分布的影响,锡或锑的添加量和常化工艺参数(常化时间、常化温度)对常化晶粒尺寸的影响。 相似文献
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电工钢(其中包括无取向的)最主要的磁特性水平由它的织构状态决定,文献中有很多关于织构对钢磁性影响方面的报道(例如[1—5]等),关于无取向电工钢各种牌号的磁性和组织之间的关系的研究资料较少,而对于非合金电工钢在文献中关于这方面的报道还没有发现。 相似文献
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调研了国内外电机用电工钢的生产现状,对2005年和2010年电机用电工钢消耗进行了预测。给出了我国2002年和2003年电力生产指标,并且分析了电工钢在电机上的应用状况。列出了中国、俄罗斯、日本高牌号无取向电工钢性能。综述了中、小、微特型电机发展趋势。 相似文献
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本文叙述了以废铁为原料,通过电铸(解)成型的方法制成化学纯度高、杂质含量少的电铸电工纯铁板(坯)。经实际反复使用证明,系配制高导磁软磁合金的理想炉料。板坯直接经冷加工成材和热处理后,具有独特的电磁性能。在某些范围内,二者均能代替坡莫合金使用,节约了昂贵的镍,经济效益显著,因而很受用户欢迎。 相似文献
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CSP生产高牌号无取向电工钢常化试验研究 总被引:1,自引:1,他引:0
以马钢CSP流程生产电工钢特点为基础,模拟了典型高牌号无取向电工钢(50W310)的生产过程,研究了常化温度对典型高牌号无取向电工钢(50W310)的组织、织构和性能的影响。结果表明:经过热轧板常化处理的成品磁性能完全达到国标要求;在实验室研究的热轧板常化温度范围内(900~1 050℃),随着常化温度的升高,热轧板晶粒尺寸逐渐增大;成品晶粒平均尺寸呈先增大后减小的趋势;成品中织构强度变弱,特别是{111}、{112}和{114}等织构明显减弱;成品铁损P15值呈先降低后升高的趋势,磁感B50值单调递增,但增幅较为缓慢。 相似文献
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Basic concepts regarding the decarburization and nitriding of cold-rolled sheets of anisotropic electrical steel produced with acquired-inhibitor formation are analyzed, in the light of production experience. The magnetic properties and surface quality of the steel sheet produced will depend on the conditions of final chemicothermal treatment. 相似文献
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摘 要: 为了获得磁性能优良的高牌号无取向硅钢,系统地研究了稀土铈对2.9%Si无取向硅钢中夹杂物的变质及粗化,退火板的组织、织构及磁性能的影响规律。结果表明:钢中添加适量(质量分数0.005 5%)的铈能使夹杂物聚集粗化,最终使成品再结晶晶粒尺寸增大,有利织构组分{100}和{110}面织构增多,不利织构组分{111}面织构减少,磁性能达到最佳。但是当铈添加过量(质量分数0.019%)时,其作用反而相反。 相似文献
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《钢铁研究学报(英文版)》2016,(2):166-170
The effects of deformation on the microstructure and magnetic properties of non-oriented electrical steels were investigated.Box-annealed electrical steel sheets were deformed by tension at four different strains:3%,8%, 12% and 25%.The internal grain misorientation caused by tensile deformation was measured by electron backscat-tering diffraction (EBSD)with grain orientation spread (GOS)as an indicator of the lattice distortion.The experi-mental results showed that the average GOS value increases with the strain.The microstructure and crystallographic texture of deformed samples did not show a significant change in samples strained below 25%.However,the mag-netic properties were strongly affected:coercivity was directly proportional to the square root of the GOS value and energy losses increased as the strain level was increased. 相似文献
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A. A. Tseng K. P. Jen T. C. Chen R. Kondetimmamhalli Y. V. Murty 《Metallurgical and Materials Transactions A》1995,26(8):2111-2121
Copper beryllium (CuBe) alloys possess excellent strength and conductivity. They have become the most important materials
used for producing high reliability connectors and interconnections for electrical and electronic applications. As demand
for high connection density in electrical and electronic products grows, springback behaviors become increasingly critical
in fabricating these miniaturized contact components from sheet base materials. In the present article, a study of the springback
behavior of CuBe sheets under different heat treatments is presented, with the goal of providing reliable information needed
for fabricating more intricate connection parts. Both experimental and analytical techniques were adopted. The tensile tester
was first used to study the springback related tensile properties. The governing tensile parameters on springback were identified,
and their variations for sheets with different heat treatments were studied. It was found that a bilinear constitutive relationship
can best characterize the stress strain behavior of the CuBe alloy. A closed form solution based on this bilinear relationship
was formulated to predict the springback for the CuBe sheets at bending conditions. A V-shaped bend tester having an interchangeable
punch to accommodate multiple radii was designed and built to evaluate the springback properties of CuBe sheets. A good correlation
was found between the analytical predictions and experimental data. A parametric study, as an example, was also performed
to provide the springback information needed for designing complicated connectors.
formerly Director of R&D with NGK Metals Corp., Reading, PA 19612 相似文献