Information such as trajectories or velocity of the particles movement and density distribution of the granular material during compaction is obtained.
应用离散单元法(DEM)研究了粉末材料在开口容器中受到刚性凸模压制时的流动特点,获得了压制过程中颗粒的运动轨迹、运动速度以及粉末密度分布等重要信息;总结了几种典型的粉末流动模式,并在相关实验中得到了印证,说明了应用DEM分析具有强剪切行为的粉末流动是可行的,结论可供粉末冶金工艺和模具设计人员参考。
Therefore,the numerical simulation of powder metallurgy compaction is now attracted much attention.
压制工序的技术水平对于粉末冶金产品的品质有着决定性的影响,而通过数值模拟改进压制技术工艺是一种十分有效的方法,目前这一方法已经得到了极大的关注。
The principles,charac- teristics and applications of dynamic magnetic compaction,and the applications of magnetic field in enhancing the prop- erties of NdFeB permanent magnet and the powder solid phase and liquid phase sintering densification are intro- duced.
讨论了稳恒磁场、变化磁场对金属凝固组织、基体中合金元素的固溶度以及 Al-Cu 合金热裂的影响,介绍了动磁压制技术的原理、特点及应用情况,磁场在提高 NdFeB 永磁体的磁性能和在粉末固相、液相烧结致密化中的应用,并展望了磁场在金属凝固和粉末冶金中未来的研究和应用发展前景。
Processing Eguipment for Pressing Side Rails of STEYR Truck Frames;
斯太尔型汽车纵梁压制工艺装备
The paper analyzes the force loading status of different parts of the mould while sintering and discusses the advantage of mixed pressing, which is testified by experiment.
文章分析了各种模具在烧结中各个部分的受力情况 ,对混合压制的优点进行了论述 ,并通过实验验证了这些推论。
Taking glucose, phenolic resin, stearic acid and the mixture of phenolic resin and stearic acid as pressing additives, the influence of these additives and the compaction pressure on the green density of boron carbide are studied.
87g/cm3时(对于粉末 4) ,这种线性关系的斜率明显变小 ,说明压制压力不需过大 ;所选用的成形剂在烧结过程中分解成碳并残留在压坯中 ,这些新生态的碳对烧结起活化添加剂的作用 。
Automatic recognition and suppression of high-frequency noises in time-frequency domain;
时频域自动识别与压制高频噪声
The determination of parameters of layout system by multiple suppression simulation.;
用多次波压制模拟确定观测系统设计参数
Shouting Under the Harness——A thematical analysis about suppression and revolt of TV Series Younger Emperor;
无处可逃——电视连续剧《少年天子》中压制与反抗主题分析秦海英