二段加压浸出中硫的行为

从硫分散剂的使用入手,首次研究了新型硫分散剂在二段加压酸浸中的使用,并分析了其利弊,得出其可能作用机理,展望了其应用前景。     

电力电子变换技术的回顾与发展

回顾了电力电子技术的历史,分析了其发展现状,探讨了其发展趋势.     

土家族饮食旅游资源特点与开发探析

将土家族饮食文化看作土家族传统文化的重要组成部分,分析了其浓厚的民族特色,指出其文化意义与开发价值.在此基础上结合现实情况探究了其发展现状,资源优势等,提出了土家族饮食旅游资源开发的具体措施.     

真空熔炼电弧炉用直流电源的发展

回顾了我国真空熔炼电弧炉用直流电源的发展历程,介绍了其发展现状,进而探讨了其发展趋势。     

动物乳腺生物反应器研究进展

介绍了动物乳腺生物反应器的优点,论述了其研究及应用概况,并对其发展趋势进行了展望.     

谢韦尔钢铁公司的矿产资源战略及竞争力

阐述了谢韦尔钢铁公司分三步走实现了其矿产资源的发展战略,即进军矿山产业、实现矿业独立经营、走国际化发展道路。详细介绍了矿产资源产业生产经营现状。分析了其在铁矿和煤炭领域的竞争力,展望了其未来投资规划。     

高炉风机经济运行探讨

围绕高炉风机经济运行,从风机系统构成进行分析,指出了影响其经济运行的要素,采取了提高其运行经济性的措施,取得了显著的经济效果.     

原位内生TiB2/Al基复合材料制备技术评述

对近年来国内外在内生TiB2颗粒增强铝基复合材料的新型制备技术的方法和原理上进行了概述,并指出其各自的优缺点,也对其主要存在的问题进行了阐述,同时对研究重点提出了建议。最后展望了其制备技术的发展趋势。     

低合金型高强度不锈钢材料的实验室研究

为提高不锈钢的机械性能,促进其作为结构材料使用,通过控制适当的合金元素配比和相应的加工工艺,实验室开发了一种低合金型的高强度不锈钢材料.介绍了不同工艺下其组织、硬度和力学性能的变化规律,并确定了能得到较好强塑性结合的热处理制度;利用金相显微镜、EBSD、TEM对其微观组织结构进行研究,分析了其强度提高的原因;根据相关国家标准评价了其耐腐蚀性和焊接性.结果表明,在铁素体基体上引入适当的第二相,可以在保持良好塑性的基础上大幅度提高材料的强度,同时具有良好的耐腐蚀性和焊接性.     

真空冶金现状及应用前景

本文回顾了真空冶金的历史及发展过程,讨论了它的特点,阐述了几种主要的真空冶金方法及应用,归纳了其主要应用领域,并指出了其发展前景及方向。     

Research status and future development trend of a novel FeSiBPCu nano soft magnetic alloy

The iron- based nano- soft magnetic alloy is applied to many magnetic components such as choke coils and transformers due to its excellent soft magnetic properties such as high saturation magnetic induction, low coercivity and low loss, which has attracted widely attention. Firstly, the research progress of traditional nano soft magnetic alloy and new FeSiBPCu nano soft magnetic alloy is elaborated??and the exploration of nano- soft magnetic alloys by some researchers at home and abroad was introduced. Then, compare the new FeSiBPCu nano- soft magnetic alloy with traditional nano- soft magnetic alloy, its advantages and disadvantages were listed. The progress and current status of some extended research on new FeSiBPCu nano- soft magnetic alloy to deal with these disadvantages was introduced. Finally, the future development of this new nano soft magnetic alloy was prospected.     

Research progress on Finemet- type alloy with high saturation magnetic induction

Finemet type alloys attract a large number of scholars at home and abroad to study them due to their excellent soft magnetic properties such as high magnetic permeability, low loss and small magnetostriction coefficient. The structure and magnetic properties of Finemet type alloys were introduced and compared with other typical soft magnetic materials. The research work on improving the soft magnetic high saturation magnetic induction intensity of Finemet type alloy at home and abroad was reviewed, and the suggestions for future research directions were put forward.     

显微组织对纳米复合永磁材料磁性能的影响的探讨

探讨了显微组织对纳米复合永磁材料的矫顽力、剩磁和最大磁能积的影响.得出了要同时得到良好的磁性能,须综合考虑晶粒尺寸和软磁性含量.设计纳米复合磁体的原则应该是:软磁相和硬磁相的晶粒尺寸分别控制在10 nm和20 nm左右,软磁性含量控制在30%~40%,而且两者之间充分交换耦合.     

双层复合永磁薄膜磁性能的模拟研究

利用微磁学理论模拟计算了Nd2Fe14B／α-Fe双层复合永磁薄膜的磁滞回线,并对双层膜体系的剩磁、矫顽力与软磁层厚度的关系进行了研究。结果显示,软磁层厚度小于临近尺寸时,磁滞回线为矩形,双层膜完全耦合;软磁层厚度与磁性能的关系表明,随着软磁层厚度的增加,剩磁先增大后减小,而矫顽力单调下降。     

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Now the soft composites are applied in the automobiles and household appliances such as ABS brake motors, refrigerator compressor motors and brushless servo motors. The process of iron powder soft magnetic composites in recently years was introduced which includes the preparation of iron powder, insulating coating, compression and heat treatment. And then the main properties of soft magnetic composites were summarized. At last some opinions on following researching directions were pointed out.     

软、硬双相永磁体中的静磁作用

从磁性粒子的静磁场出发,分析计算了由软、硬磁性两相粒子随机混合的双相磁体中的静磁作用。计算得出:取向的硬磁粒子施加于磁体中软磁相上的静磁场,在磁化方向上的分量为1个正值,它正比于硬磁相的体积分数及其饱和磁化强度,其作用将提高软磁相的矫顽力。     

PM soft magnets in new applications

Both hard and soft magnetic materials were discussed in several presentations and posters at the EURO PM 2001 conference in Nice. The present article summarises some of the key aspects relating to soft magnetic properties of ferrous PM materials and composites for automotive and other applications.     

硅钢的研究现状及发展趋势

硅钢是军事工业和电子电力行业不可或缺的重要软磁合金。因生产工艺复杂、制造技术严格,硅钢质量成为一个国家钢铁产业发展水平的标志。分别从无取向硅钢和取向硅钢两个方面进一步概括了硅钢的理论研究、取向硅钢抑制剂的研究改进及新品种的开发,综述了硅钢先进生产工艺在国内外主要生产厂家的应用现状。在此基础上,指出了目前硅钢研究和生产存在的问题, 并对其今后的研究方向作简单展望。     

块体纳米软磁材料的研究现状

介绍了国内外块体纳米软磁材料的发展和应用情况。对块体纳米软磁材料的制备方法、纳米晶的形成机理、优异软磁性能的根源进行了探讨。阐述了未来块体纳米软磁材料的研究方向。     

锰锌铁氧体粉制备技术综述

综述了近几年来软磁铁氧体粉 (特别是锰锌铁氧体粉 )的制备方法、研究现状及应用前景