不同形貌Al-Fe金属的块体压制成形模拟研究  

Simulation study of block press molding of Al-Fe metals with different morphologies

作　　者：李振亮[1] 王鑫[1] LI Zhenliang;WANG Xin(College of Materials And Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,CHN)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《制造技术与机床》2024年第4期71-77,共7页Manufacturing Technology & Machine Tool

基　　金：北京科技大学教育部重点实验室开放项目(2019109)。

摘　　要：文章以含40%Al的Al-Fe复合金属为研究对象,对颗粒状和屑状40Al-Fe复合金属分别进行压制预变形,并对屑状40Al-Fe复合金属预制坯进行了二次热压缩变形,重点研究压制预变形及二次热压缩对Al-Fe复合金属成形性和界面影响。结果表明:压力为16 MPa时,颗粒状40Al-Fe复合金属预制坯(密度为4.54 g/cm^(3))成形性良好且形成致密界面;压力为16 MPa时,屑状40Al-Fe复合金属预制坯(密度为3.50 g/cm3)可以成形但界面存在孔洞,Al屑主要为“片层状”“狗牙状”“圆圈状”“波浪状”,其经二次热压缩变形,“圆圈状”Al屑连成一个整体,“狗牙状”与“波浪状”Al屑均演变为“片层状”,而Fe屑仍为“片层状”“块状”,未发生明显变形。变形温度300℃、变形速率0.5 s^(-1)、变形程度0.1是目前生产工艺最佳参数,此时屑状40Al-Fe复合金属成形性最佳且界面结合良好(密度为4.66 g/cm^(3))。In this paper,the Al-Fe composite metal containing 40%of Al is taken as the research object,and the granular 40Al-Fe composite metal and chip Al-Fe composite metal are pressed and predeformed respectively,focusing on the second hot compression deformation of the chip Al-Fe composite metal preformed billet,to study the effect of pressing predeformation and hot compression on the formability and interface of Al-Fe composite metal.The results show that the granular 40Al-Fe composite metal preforms(density of 4.54 g/cm3)at a pressure of 16 MPa have good formability and form a dense interface.Pressure of 16 MPa when the chip-like 40Al-Fe composite metal prefabricated billet(density of 3.50 g/cm3)can be molded but there are holes in the interface,Al chips are mainly“lamellar”,“dogtooth”,“circle”,“wave”,after the second hot compression deformation“circle”Al chips into a whole,“dogtooth”and“wavy”,“dogtooth”and“wavy”.“Circle-like”,“wave-like”,after the second thermal compression deformation“circle-like”Al shavings connected to a whole,“dogtooth-like”and“wave-like”Al shavings,“dogtooth-like”and“wave-like”Al shavings,“dogtooth-like”and“wave-like”Al shavings.“Wave-like”Al chips are evolved into“lamellar”,after the second thermal compression deformation Fe chips are still“lamellar”,“blocky”,without obvious deformation occurs.The deformation temperature of 300℃,deformation rate of 0.5 s-1,and the degree of deformation of 0.1 are the best parameters of the current production process,at which time the shavings of 40Al-Fe composite metal have the best formability and good interfacial bonding(density of 4.66 g/cm3).

关 键 词：压制成形 Al-Fe复合金属 界面 

分 类 号：TG146.2[一般工业技术—材料科学与工程]