旋转挤压工艺对耐热铝合金组织及性能的影响  

Effect of Rotary Extrusion Process on Microstructure and Properties of Heat-resistant Aluminum Alloy

作　　者：田贺鑫 马冬梅 艾子清 陈佳斌 张弛 张广安[1] 赵兴明[1] TIAN He-xin;MA Dong-mei;AI Zi-qing;CHEN Jia-bin;ZHANG Chi;ZHANG Guang-an;ZHAO Xing-ming(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China;Engineering department of University of Connecticut,Connecticut,Storrs,06269)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [2]康涅狄格大学工程学院,康涅狄格斯托尔斯06269

出　　处：《辽宁工业大学学报（自然科学版）》2024年第2期71-74,共4页Journal of Liaoning University of Technology(Natural Science Edition)

摘　　要：为改善Al-Si-Fe合金的力学性能,设计了一种旋转挤压工艺,在正挤压的同时,通过凹模的旋转使材料产生一定的纯剪切变形,变形的叠加既可以细化组织又可以破碎合金粉末颗粒的原始边界,在后续烧结时能够实现颗粒之间更好的冶金结合,从而提高材料的力学性能,并实现材料的连续制备。研究表明,经旋转挤压的合金材料烧结后的密度达到理论密度的97%,为2.70 g/cm3,显微硬度160 HV,抗拉强度396 MPa。In order to improve the mechanical properties of Al-Si-Fe alloy,a rotary extrusion process is designed in this paper.At the same time of forward extrusion,the material produces a certain pure shear deformation through the rotation of the die.The superposition of deformation can not only refine the structure but also break the original boundary of the alloy powder particles.In the subsequent sintering,a better metallurgical bonding between the particles can be achieved,thereby improving the mechanical properties of the material and achieving continuous preparation of the material.The results show that the density of the alloy material sintered by rotary extrusion reaches 97%of the theoretical density,which is 2.70 g/cm3,the microhardness is 160 HV,and the tensile strength is 396 MPa.

关 键 词：粉末冶金 旋转挤压 Al-Si-Fe 机械性能 

分 类 号：TG376.3[金属学及工艺—金属压力加工]