Research into Shear Deformation-added Extrusion of Metal-based Powder Using Separated Rotary Container

分体式旋转容器剪切变形挤压金属基粉末的研究

基本信息

批准号：
13650775
负责人：
MAKI Seijiro
金额：
$ 1.54万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650775/
关键词：
powder consolidation extrusion shear deformation metal powder

项目摘要

Shear deformation-added extrusion of metal-based powder using a separated rotary container devised taking note of the promotion of adhesion between metal powders by shear deformation addition was experimentally studied for its realization. From fundamental experiments on ideal introduction of the shear deformation with aluminum powder whose size is 20-42 in mesh, it was found that concerning a shape of the rotary container its barrel length L should be more than the shortest diagonal distance D of the hexagonal cross-section of the container cavity and that the rotating rate of the container should be set as follows, depending on the pressure acting on the shearing site. Ram travel a revolution of the container should be more than 5mm and 1.5mm when the pressure is 98MPa and 147MPa, respectively. Based on the findings above, continuous consolidation of the aluminum powder by means of step-by-step operation of the devised extrusion method was experimented. In the experiment, an extrusion die with a cross-sectional reduction of 11.5% was used and material feeding was done with pre-compacted powder billets formed by the pressure 147MPa. Contrary to expectation, all the experiments tried ended in failure. The cause of the failure is a sharp increase of extruding force, which made an intrusion of the aluminum powder into the gap between the container and punch and prevented the successive feeding of the material. The failure of the experiment prevented the influence of processing conditions on product's property from being investigated. However, the experiments showed that the boundary produced between the billets fed is completely removable by the introduction of the shear deformation. The findings in the former part of this study have been published, but those in the latter have not yet.

实验研究了通过剪切变形容器设计的分离旋转容器的剪切变形挤出金属粉末，该旋转容器通过实验研究了通过剪切变形的添加来促进金属粉末之间的粘附，以实现其实现。从与铝粉的理想引入剪切变形的基本实验，其尺寸为20-42的网状粉末，发现关于旋转容器的形状其桶长L的形状应大于最短的对角线距离的最短对角线距离D的六边形横截面的六边形横截面的距离型容器腔的六边形横截面应等于旋转速度，并且在旋转速度上均应按照施加的压力，依次将其设置为dectsing cating contects contects contects contectsing contects contersweed。当压力分别为98MPA和147MPA时，RAM旅行的容器的革命应大于5mm和1.5mm。根据上面的发现，试验了铝粉的连续合并铝粉的连续合并，通过逐步操作设计了挤出方法。在实验中，使用了11.5％的横截面降低的挤压死亡，并使用由压力147MPA形成的预熟的粉状钢筋进行材料喂养。与期望相反，所有的实验都以失败结束。失败的原因是挤出力的急剧增加，这使铝粉侵入了容器和打孔之间的间隙，并防止了材料的连续进食。实验的失败阻止了处理条件对产品特性的影响。但是，实验表明，通过引入剪切变形可以完全去除饲料中产生的边界。本研究的前一部分的发现已经发表，但后者尚未。