共查询到20条相似文献,搜索用时 93 毫秒
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新日铁公司于 4月 2 3日宣布 ,该公司与蒂森钢铁公司 (TKS)及其子公司蒂森电工钢公司(TKS—ES)签署了协议 ,扩大在电工钢领域的合作。上述 3个公司拟通过合作研究和开发 ,保持其在全球电工钢生产领域的竞争力 ;并希望在非取向电工钢和取向电工钢方面相互转让最新的技术 /许可。新日铁公司和蒂森电工钢公司分别是日本和欧洲最大的电工钢生产企业。目前世界上每年的电工钢总产量约为 5 60万t,其中 2 5 %是取向电工钢 ,75 %为非取向电工钢。取向电工钢用来制作变压器 ,而非取向电工钢用来制造电动机芯片。目前新日铁公司占有取向和非取向电… 相似文献
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介绍了国内、外电工钢极薄带的生产现状及市场应用的情况,以及典型生产企业的生产规模、产品性能和应用领域,指出扩大高牌号无取向电工钢生产、提高产品质量是目前电工钢发展的迫切要求。 相似文献
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电工钢的研发、生产历来是我国钢铁生产中的薄弱项目。如热轧硅钢国外早已停止生产,而我国还在大量生产、使用,在2004年,全国热轧硅钢产量约达100万吨,几占整个硅钢产量223.6万吨的半壁江山。我国硅钢生产长期来跟不上国民经济的快速发展,每年都要进口大量冷轧硅钢,2004年即进口164.3万吨,占国内冷轧硅钢市场的份额达43.4%。 相似文献
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应用统计分析技术,对宝钢无取向电工钢生产情况进行了分析,并结合电工钢产品的材质特性分析对宝钢现行的无取向电工钢生产工艺提出了改进建议。工艺改进后,宝钢无取向电工钢产品性能得到明显改善。 相似文献
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文章介绍了唐钢生产电工钢过程中控制硫含量的工艺,对唐钢的生产现状进行了调查统计,分别从预处理、转炉、RH以及钢包使用等方面进行了分项解析,最后找到了影响电工钢回硫的原因,并且对回硫的现象进行了理论分析。基于回硫机理对各工序进行了优化和改善,通过加强过程控制减少钢水回硫的问题。具体措施包括:保证预处理扒渣干净,降低转炉含硫物料的加入,提供洁净的运送钢包,优化精炼渣脱硫条件等。采取措施以后统计生产数据,结果表明:电工钢硫(成品w[S]≤0.008%)合格率由不到80%提高到了100%。 相似文献
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《CIRP Annals》2019,68(1):253-256
To convert electric into kinetic energy within an electrical motor emerging magnetic fields have to be amplified by using electrical steels. The efficiency of this energy conversion is determined by the electrical steel’s magnetic properties. Due to residual stress having a negative effect on an electrical steel’s magnetic behavior, manufacturing processes like stamping that deform the material thereby decrease the electrical motor’s efficiency. This paper presents a novel approach to predict stamping-related increased magnetic property deteriorations from in situ measured values. Using the approach can prevent an excessive efficiency decrease from increasing tool wear by just in time maintenance. 相似文献
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Temporary corrosion protection of prestressing steels with film forming coatings Prestressing steels may be subjected to corrosive conditions during the manufacturing process at building sites. Due to this a risk of hydrogen induced stress corrosion cracking of the steels may arise. Electrochemical investigations and constant load tests have been carried out to show the suitability of different film forming coatings to be applied as temporary corrosion protection measures. The results indicated the applicability of two agents involved in the investigations without any risk for post tensioning purposes. 相似文献
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Temporary corrosion protection of prestressing steels in non‐injected ducts Prestressing steels may be subjected to corrosive conditions during the manufacturing process at building sites. Due to this a risk of hydrogen induced stress corrosion cracking of the steels may arise. Tests under practical conditions in a prestressed concrete beam were carried out where non‐injected ducts were treated with preheated scavenging air to prove this method being able to protect the prestressing steels against corrosion. The results yielded sufficient corrosion protection by this measure and therefore it may be an interesting alternative in comparison to corrosion protection by film forming agents which contain inhibitors. 相似文献
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Car manufacturing is always regarded as the key industry behind sheet metal forming, and thus, the requirements of and developments in car manufacturing play a decisive role in the development of sheet metal forming. The automotive industry is faced with contradictory demands and requirements: better performance with lower consumption and less harmful emissions, more safety and comfort; these are extremely difficult to supply simultaneously with conventional materials and conventional manufacturing processes. The fulfillment of these often contradictory requirements is one of the main driving forces in the automotive industry and thus in the material and process developments in sheet metal forming, as well. In recent years, significant developments can be observed in the application of high-strength steels. In this respect, the application of various dual-phase steels is one of the best examples. However, the application of these highstrength steels often leads to formability and manufacturing problems. One formability problem is the springback occurring after sheet metal forming. In the current research, we have dealt mainly with advanced high-strength steels, primarily with dual-phase steels. When applying them, the springback phenomenon is one of the most critical issues. To reduce the tremendous amount of experimental work needed, we also applied numerical simulation using isotropic–kinematic hardening rules. The isotropic–kinematic hardening behavior of a given material in the applied Auto Form numerical package may be characterized with three independent material parameters c, v and K(a detailed explanation of their meaning will be given in the main part of this paper). However, we found that the material data included in simulation packages for these new high-strength steels are not fully adequate. For the determination of more reliable material parameters and to achieve better simulation results, a new testing device was developed. Numerical simulations were performed using the material parameters determined by the new device to show the sensitivity of springback behavior to these material parameters. 相似文献
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论述了无取向电工钢在低磁场下的应用,探讨了钢的成分、夹杂、组织及生产工艺对低磁场性能的影响。 相似文献
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在强氧化气氛下的低碳低硅百吨级电渣锭生产 总被引:2,自引:0,他引:2
研究开发了在强氧化气氛下重熔低C(~0.15%)、低Si(≤0.05%)电渣钢确保冶金质量的电渣重熔技术。据此,生产了单重百吨以上的石油化工高压容器锻件用大型电渣锭10根。产品检验结果表明性能优良。 相似文献
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Field emission-scanning electron microscopy(FE-SEM) technique was employed to observe the shape,size and distribution of AIN MnS inclusions in oriented electrical steels. Specimens used for FE-SEM observation were deeply electrolytic etched at room temperature in non-aqueous acetylacetone(AA) solution. The results indicate that the FE-SEM technique has obvious advantage in specimen preparation. Therefore, it can be easily used to identify the AIN MnS inclusions and even copper nano-particles in oriented electrical steels with the same analysis accuracy as that by TEM. This technique is a good substitute for TEM and the associated specimen preparation in the observation of inclusions in electrical steels. It will be a powerful technique for routine analysis in the production of grain oriented electrical steels. 相似文献