挤压速度对6063铝合金内螺纹管管壁组织形貌的影响  

Influence of extrusion speed on microstructure of 6063 aluminum alloy internal threads

作　　者：李浩 黎华杰 黄东男 LI Hao;LI Huajie;HUANG Dongnan(Science and Technology Innovation Department,Aluminum Corporation of China Limited,Beijing 100082,China;Inner Mongolia University of Technology,Hohhot 014017,Inner Mongolia;Chinalco Materials Application Research Institute Co.,Ltd.,Beijing 102200,China)

机构地区：[1]中国铝业集团有限公司科技创新部,北京100082 [2]内蒙古工业大学,内蒙古呼和浩特014017 [3]中铝材料应用研究院有限公司,北京102200

出　　处：《轻合金加工技术》2023年第6期34-44,共11页Light Alloy Fabrication Technology

基　　金：国家自然科学基金(5186050063)。

摘　　要：用自行设计的方法挤压出6063铝合金内螺纹管,采用EBSD技术分析了挤压温度为460℃时,挤压速度(60 mm/min~120 mm/min)对6063铝合金内螺纹管管壁组织的影响。研究结果表明:在恒定的挤压温度(460℃)下,管壁横截面主要是周向带状晶,纵截面主要是轴向带状晶。随着挤压速度升高,管壁横纵截面晶粒尺寸均增大;当挤压速度为120 mm/min时,管壁横、纵截面晶粒尺寸达到最大值,分别为17.05μm和11.64μm;挤压速度为60 mm/min时,管壁的晶粒尺寸较小,均匀化程度最好。A self-designed method was used to extrude 6063 aluminum alloy internally threaded pipes.EBSD technology was used to analyze the effect of extrusion temperature of 460℃ and extrusion speed of 60 mm/min-120 mm/min on the wall structure of 6063 aluminum alloy internally threaded pipes.The research results indicate that at a constant extrusion temperature of 460℃,the transverse section of the pipe wall is mainly composed of circumferential banded crystals,while the longitudinal section is mainly composed of axial banded crystals.As the extrusion speed increases,the grain size of the transverse and longitudinal sections of the pipe wall increases.When the extrusion speed is 120 mm/min,the grain size of the transverse and longitudinal sections of the pipe wall reaches the maximum value,which is 17.05μm and 11.64μm respectively.When the extrusion speed is 60 mm/min,the grain size of the pipe wall is smaller and the degree of uniformity is the best.

关 键 词：6063铝合金 内螺纹管 挤压速度 管壁截面 组织演变 

分 类 号：TG379[金属学及工艺—金属压力加工]