Fe73.5Cu1Mo3Si13.5B9超微晶磁粉芯的研究

本文对Ｆｅ７３．５Ｃｕ１ｍＯ３Ｓｉ１３．５Ｂ９超微晶合金带制作磁粉芯的工艺进行了研究。特别对粉的粒度，成形压力，绝缘的配比以及磁粉芯的磁性能进行了深入的探讨。发现磁粉芯的性能与制粉用的微晶带材是否具有优良磁性能无关。通过调整绝缘剂量及其组分可以使磁粉芯的磁性能发生相应的变化。超微晶粉的粒度对磁粉芯的性能及频率特性起着决定的作用。     

Fe_（73．5）Cu_1Nb_3Si_9B_（13．5）纳米软磁合金磁粉芯的

实验研究不同制粉方法所生产的Ｆｅ７３．５Ｃｕ１Ｎｂ３Ｓｉ９Ｂ１３．５超微晶合金粉末制成的磁粉芯，证明了用控制单辊法制得的该合金磁粉芯性能良好，温度稳定性好，且成本低。     

制备工艺对铁硅铝磁粉芯品质因数的影响

采用球磨制粉和模压成型法制备了FeSiAl磁粉芯,研究了绝缘剂用量、成型压力、退火温度和磁粉粒度对铁硅铝磁粉芯品质因数的影响.结果表明,随绝缘剂用量和成型压力的增大,磁粉芯的品质因数增大;退火温度升高,有助于降低磁粉芯的内应力,提高品质因数,但过高的退火温度会降低磁粉芯的品质因数;随着磁粉粒度的减小,磁粉芯品质因数增大.     

Fe73.5Cu1nb3Si9B13.5纳米软磁合金磁粉芯的性能研究

实验研究不同制粉方法所生产的Ｆｅ７８．５Ｃｕ１Ｎｂ８Ｓｉ９Ｂ１８．５超微晶合金粉制成的磁粉芯，证明了用控制单辊法制得的该合金磁粉芯性能良好。温度稳定性好，且成本低。     

铁硅铝磁粉芯磁导率的研究

采用粉末冶金法制备铁硅铝磁粉芯,研究了绝缘粘结剂用量、成型压力、退火温度和磁粉粒度对铁硅铝磁粉芯磁导率的影响.结果表明,随着绝缘粘结剂用量的增多,磁粉芯的磁导率减小;去应力退火有助于提高磁粉芯的磁导率,随退火温度的升高,磁粉芯的磁导率增大;随着磁粉粒度及成型压力的增大,磁粉芯的磁导率增大.     

FeSiAl磁粉芯工艺研究进展

介绍了FeSiAl磁粉芯的制备工艺,主要包括制粉方法、绝缘包覆、压制成型和热处理等环节。总结了各个环节的作用及对FeSiAl磁粉芯性能的影响。     

通过优化偶联剂含量改善磁粉芯综合性能

磁粉芯在工程应用中会遇到体积变化引起的开裂、磁性能低等问题,目前未见关于这方面的研究。通过在羰基铁粉磁粉芯（包含磁环、磁片和一体成型电感）中加入不同含量 KH550 硅烷偶联剂,研究其成型性、磁性能和力学性能,并利用 SEM、TMA 和 LCR 等测试分析偶联剂对磁粉芯性能影响的作用机理。研究表明偶联剂能将树脂“约束”在磁粉表面,并在固化过程中带动磁粉颗粒重排,从而增加磁粉芯的膨胀系数。添加 0 wt.%和 0.1 wt.%偶联剂的磁粉芯具有负的膨胀系数,容易收缩开裂。当偶联剂含量达到 0.3 wt.%、0.5 wt.%和 0.7 wt.%时,树脂固化过程中磁粉芯的膨胀系数升高,从而增加磁粉芯的体积,有效抑制磁粉芯的开裂倾向。但是,体积的增加会降低磁粉芯的密度、磁导率、Q 值和力学性能,增加损耗。综合考虑磁粉芯的成型性和其他性能,偶联剂添加的最佳比例是 0.3 wt.%。揭示了偶联剂对磁粉芯膨胀系数等综合性能的影响规律,可为高性能磁粉芯的工程化应用提供重要理论依据。     

Fe基纳米晶粘结软磁材料的研究

系统地论述了Fe基纳米晶粘结软磁材料的制备工艺，采用快淬磁粉，选择围态环氧树脂作粘结剂。通过粘结方法，制备了Fe基纳米晶粘结磁体。然后分析了不同的磁粉粒度和模压压力对粘结磁体磁性能的影响。     

Fe-Si-B非晶粉末及其磁粉芯研制进展概述

本文概述了带材破碎制备Fe78Si9B13非晶合金粉末及其磁粉芯的制备与性能研究;铁硅硼合金是制备磁粉芯的理想原料;球磨气流复合破碎法是带材破碎制粉的有效途径之一;通过不同磁导率非晶磁粉芯产品的磁性能测试,证明Fe78Si9B13非晶磁粉芯是综合性能良好的一种新型磁粉芯.     

铁硅铝磁粉心的直流叠加特性研究

采用粉末冶金工艺制备了铁硅铝磁粉心,研究了粉末粒度、绝缘剂用量、成型压力和热处理气氛对铁硅铝磁粉心直流叠加特性的影响。结果表明,粉末粒度越小,磁粉心的直流叠加性能越好;随绝缘剂用量的增加,磁粉心的偏置特性变好;成型压力的增加恶化了磁粉心的直流叠加特性;空气烧结能改善磁粉心的直流叠加特性。     

Removal of sulfur in coke oven gas by mixing ZnO-based additive into coal

1　ＩＮＴＲＯＤＵＣＴＩＯＮＳｕｌｆｕｒｄｉｓｔｒｉｂｕｔｉｏｎｉｎｃｏｋｉｎｇｐｒｏｃｅｓｓｉｎｃｌｕｄｅｓｔｗｏｐａｒｔｓ .ＯｎｅｐａｒｔｉｓｇｏｉｎｇｉｎｔｏＣＯＧａｓＨ2 Ｓ ,ＣＳ ,ＣＯＳａｎｄＣ2 Ｈ2 ＳＨ .ＴｈｅｏｔｈｅｒｐａｒｔｉｓｒｅｓｉｄｕａｌｉｎｃｏｋｅａｓＦｅＳ ,ＣａＳ ,Ｓ2 ａｎｄｓｏｏｎ .Ｔｒａｄｉｔｉｏｎａｌｌｙ ,ｔｈｅｒｅｍｏｖａｌｏｆｓｕｌｆｕｒｏｆＣＯＧｉｓｂｙｓｐｒａｙｉｎｇａｍｍｏｎｉａｗａｔｅｒｉｎｔｏｈｏｔｃｏａｌｇａｓｔｏｆｏｒｍａｍｍｏｎｉｕｍｓｕｌｆａｔ…     

New Fe-based soft magnetic amorphous alloys with high saturation magnetization and good corrosion resistance for dust core application

Fe-rich amorphous dust core alloys with minor-addition of Mo and/or Cr were synthesized because of the industrial request of mass production of high efficient low core loss Fe-based dust cores. It was found that the present Fe-(Cr, Mo)-P-B-Si-(C) amorphous alloy ribbons exhibit good soft magnetic properties of above 1.5 T for saturation magnetization, below 10 A/m for coercivity and rather good corrosion resistance in 3%NaCl aqueous solution. Besides, the amorphous alloy ribbons exhibit good bending ductility in as-spun and optimally annealed states. It is noticed that these characteristics are much superior to those for commercial Fe-Cr-Nb-P-B-Si soft magnetic dust core alloy (SENNTIX). In addition, the annealing treatment was noticed to cause the improvement of corrosion resistance without detriment to bending ductility. The new Fe-based soft magnetic alloys with good combined characteristics are expected to be used as the basic material as high-efficient soft magnetic dust cores in a high frequency range.     

铝材微弧氧化陶瓷膜的电绝缘性

研究了商用硬铝经微弧氧化后的电绝缘性能。结果表明,在干燥大气中,陶瓷膜厚度增加,击穿电压升高,而平均击穿场强下降;陶瓷膜孔隙率增加,湿大气条件下击穿电压的差值增加;微弧氧化中加入适量添加剂可使击穿电压显著提高。     

造型线粉尘回收工艺探讨

含泥量对型砂性能及其稳定性的影响十分重要,型砂中的含泥量是包括有效陶土、有效煤粉、添加剂及型砂中微粒灰分在内的总和。作者通过对造型粉尘的研究,发现回收旧砂中含泥量低至一定质量分数时,可通过粉尘回用稳定型砂含泥量。旧砂处理及混砂除尘过程中抽出的有效膨润土和煤粉,能够回收利用,可以降低成本,同时有利于环境保护。     

湿砂型铸铁件的粘砂缺陷--湿砂型铸铁件缺陷讲座(一)

介绍湿砂型铸铁件机械粘砂和化学粘砂的区分方法，各种因素对机械粘砂的影响，包括：砂型紧实度、浇注温度、型砂的粒度和透气性、砂型涂料等。煤粉是防止粘砂和改善表面光洁度的主要型砂加入物。对煤粉的质量、有效煤粉含量、煤粉的代用品以及煤粉的补加量等问题进行了详细的的分析讨论。     

Thermal solidification of stainless steelmaking dust

Stainless steelmaking dust makes an environmental problem in the disposal or landfills and has been assigned as a hazardous waste by various government regulatory agencies because it leaches heavy metals to the groundwater or rainwater in the concentrations exceeding the environmental guidelines for solid waste disposal. Solidification of the dust is to stabilize the hazardous components into amorphous silica-alumina-based clays. Various mixtures of stainless steelmaking dust and clay were investigated and the softening temperatures of these mixtures were measured. The results indicate that the mixture of stainless steelmaking dust and clay additive with 1：1 ratio has the lowest softening temperature of I 100 ℃. The clinkers can pass the TCLP leaching test after being thermally treated at the softening temperature for 15 min. A thermal process for the solidification of stainless steelmaking dust with typical clay is developed and the product is desirable for the production of bricks or disposal and landfill.     

A review of additive manufacturing technology and its application to foundry in China

The application of additive manufacturing technology is one of the main approaches to achieving the rapid casting. Additive manufacturing technology can directly prepare casting molds (cores) with no need of patterns, and quickly cast complex castings. The combination of additive manufacturing and traditional casting technology can break the constraint of traditional casting technology, improve casting flexibility, and ameliorate the working environment. Besides, additive manufacturing promotes the realization of "free casting", greatly simplifying the processing procedures and shortening the manufacturing cycle. This paper summarizes the basic principle of additive manufacturing technology and its development situation domestically and overseas, mainly focusing on the development status of several main additive manufacturing technologies applicable to the foundry field, including three-dimensional printing, selective laser sintering, stereolithography, layered extrusion forming, etc. Finally, the future development trend of additive manufacturing technology in the foundry field is prospected.     

Additive manufacturing and foundry innovation

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-cost development of high-performance components with complex shapes. The additive manufacturing technology commonly applied in casting mold preparation (fusible molds, sand molds/cores and ceramic cores) mainly includes selective laser sintering (SLS) and binder injection three-dimensional printing (3DP). In this work, the research status of SLS/3DP-casting processes on material preparation, equipment development, process optimization, simulation and application cases in aerospace, automotive and other fields were elaborated. Finally, the developing trends of the additive manufacturing technology in the future of foundry field are introduced, including multi-material sand molds (metal core included), ceramic core-shell integration and die-casting dies with conformal cooling runners.     

聚氨酯泡沫绝热层高效精密打磨装置设计与建模

针对现有液氧贮箱的结构特点以及贮箱绝热层打磨中存在的工艺问题,以聚氨酯泡沫塑料自动化打磨机器人为基础,设计出一种能够高效精密地切削去除绝热层材料的打磨装置。该装置包括打磨工具系统、实时测厚系统和控制系统。装置通过实时测厚系统对泡沫层厚度进行精准在线测量,采用直线模组和气动马达分别对刀具进行位置实时控制和转速控制,在获得实时测厚系统所测的厚度值后到达对应的位置对材料进行实时切削,同时辅助有效随动吸尘装置,实现贮箱聚氨酯泡沫绝热层高效自动打磨,在保证加工精度的同时,极大地提高了工作效率。     

制造可防眩AG玻璃的喷砂机设计及开发

喷砂机在生产加工玻璃的过程中,发现机器不具备循环系统,无法有效地回收利用水砂混合液,且产生巨大的噪音污染和粉尘污染,无法大批量生产玻璃。针对这个问题,通过将喷砂机底部设计成斜面,将水砂混合液重新聚集流入混合液箱中;增加抽气系统,将粉尘收集处理;通过增加隔音板,减少噪音污染;将喷砂枪设计成交错排布,增大喷砂枪摆动距离,进而实现工厂大批量生产玻璃。最后通过实验测试,改装设计新型喷砂机,有效地解决以上问题。