东莞市工业锅炉水处理现状及节能减排

本文对东莞市工业锅炉的水处理现状进行了调查和总结,对存在的问题从设备配置、人员素质以及管理等各方面进行了分析,阐明了水处理工作与节能减排的关系,并提出了相应的对策和措施。     

FMS中的自动仓库控制与管理

本文介绍了应用于ＦＭＳ中的自动仓库，交流了自动仓库的控制与管理技术。     

La/Ce元素比对RE-Fe-B磁体微观结构及磁性能的影响

制备了Nd9.45(LaxCey)4.05FebalB6.0(at％,x:y=4:1,3:2,2:3,1:4)烧结磁体,研究La/Ce比例对磁体的磁性能、微观结构、稀土元素分布的影响.实验结果表明,磁性能随La/Ce比的减小先缓慢增高后降低,2:3为最佳值,磁性能为剩磁12.2 kG,矫顽力7.42 kOe,最大磁能积33.74 MGOe.SEM观察发现,La/Ce比过高或过低不利于形成良好的晶界相,会产生晶界不连续或晶界相富集,继而影响磁性能.La/Ce比为2:3时,晶界清晰连续.烧结磁体中进入主相晶粒中的稀土元素总和基本保持稳定,La、Ce元素之和存在阈值,在La/Ce比为2:3时出现.     

采用面向对象技术,对NC程序进行模拟检验

本文介绍了用面向对象的设计方法设计开发的一个基于WINDOWS的数控车床NC程序模拟检验软件，同时简要地叙述了在开发过程中的基本思路以及所考虑的若干要点。该软件完成了从编辑、检验、修改、模拟检验的全过程。面向对象的设计方法使得该软件能够较好地符合实际加工的需要。     

OSG立铣刀切削性能试验研究

用OSG的FX系列立铣刀进行切削对比试验,根据试验结果,讨论硬质合金立铣刀的使用寿命及最佳切削条件     

球面自动精密研抛器的研制与应用

介绍基于定心变角旋转加工法原理开发的球面自动精密研抛器,并叙述了使用该抛研器普通数控车床上实现高精度铝球镜面加工的实验过程和采用的工艺参数。     

NE150链条斗式提升机下链轮装置的改进

<正>NE150链条斗式提升机用于输送成品水泥,下链轮支撑原是滚动轴承。生产中下链轮轴和机壳间的密封易失效。我们将轴承改为滑动轴承,并对相应构件作变动。改后结构既保证了机壳密封,也减轻了链条的磨损。1问题分析提升机下部结构见图1。     

Structure and magnetic properties of bulk nanocrystalline Nd-Fe-B permanent magnets prepared by hot pressing and hot deformation

Structure and magnetic properties were studied for bulk nanocrystalline Nd-Fe-B permanent magnets that were prepared at 650 °C for 3 min under 300 MPa using the SPS-3.20-MK-V sintering machine and the hot pressed magnets were then submitted to hot deformation with height reduction of 50%,60%,70%,80%,and 85%.Effects of height reduction(HR) and deformation temperature on the structure and magnetic properties of the magnets were investigated.The crystal structure was evaluated by means of X-ray diffraction(XRD) and the microstructure was observed by transmission electron microscopy(TEM).The magnetic properties of the magnets were investigated by vibrating sample magnetometer(VSM).As the height reduction increased,the remanence(B r) of the magnets increased first,peaks at 1.3 T with HR=60%,then decreased again,and the coercivity(H ci) of the magnets decreased monotonically.On the other hand,as the deformation temperature increased,the B r of the magnets increased first,peaks at 1.36 T with HR=60%,then decreased again,and the H ci of the magnets decreased monotonically.Under optimal conditions,the hot deformed magnet possessed excellent magnetic properties as B r =1.36 T,H ci =1143 kA/m,and(BH) max =370 kJ/m 3,suggesting the good potential of the magnets in practical applications.     

Tm元素对SmCo_5晶体结构与磁性能的影响（英文）EI北大核心CSCD

采用X射线衍射分析(XRD)和磁性能测试等方法,分析了Tm元素掺杂对Sm Co5晶体结构和内禀磁性能的影响。XRD测试结果表明:Sm Co5和Sm0.8Tm0.2Co5.2均为Ca Cu5结构,掺杂Tm元素后,晶格常数c值增大,而a,b与晶胞体积减小;M-T曲线测试结果表明:Sm Co5和Sm0.8Tm0.2Co5.2的居里温度分别为957和965 K;在测试外加场为7 T的条件下,300 K时Sm Co5的各向异性场HA和饱和磁化强度M7T均高于Sm0.8Tm0.2Co5.2;当温度升高至473 K,Sm Co5的HA和M7T要低于Sm0.8Tm0.2Co5.2,说明Sm Co5中进行Tm元素掺杂可以有效的改善其在高温条件下的磁性能。