【摘要】 描述了松散粉末在刚性模中的压制过程,介绍了粉末体压制过程中的致密化及变形理论的发展;比较了多孔预成形坯的变形与致密金属塑性变形的不同,介绍了多孔体变形时氧化膜和孔隙对于变形的影响,给出了研究多孔体塑性变形的方法和一种得到较多应用的屈服模型。更多还原

【Abstract】 This paper describes the compaction of the powder in rigid mould and the development of densifying and deformation mechanism during this process.The emphases are also put on the difference of plastic deformation mechanism between porous alloy and densified alloy,deformation of the former affected greatly by the oxide film and porosity.In addition,the author also presents the advanced methods of plastic deformation of the porous materials,especially a popular yield model.更多还原