摘要
对液压成形后的T2紫铜三通管的直壁、拐角、顶部进行了微观组织及硬度分析。从受力和微观组织两方面分析了顶部易破裂的原因。运用XRD测试手段分析了顶部、拐角、直壁的位错密度变化。结果表明,组织中出现孪晶,晶粒被拉长成板条状,三通管的拐角处硬度最大,顶部硬度最小。顶部位错密度增加最多,拐角位错密度增加最少。
The microstructure and hardness of straight wall,corner and top part of T2 copper tube after hydroforming were analyzed.The causes of the fracture of the top part were analyzed from the stress and the microstructure.The change of dislocation density at top,corner and straight wall was analyzed by using XRD testing method.The results show that twins appear in the microstructure,the grain is elongated into lath-shaped;the hardness at the corner of the three-way tube is the largest,the hardness at the top is the smallest;the increase of the dislocation density at the top is the maximum,and the increases of the dislocation density at the corner is the minimum.
作者
郭衡
肖小亭
陈名涛
童江槐
周梓荣
GUO Heng;XIAO Xiaoting;CHEN Mingtao;TONG Jianghuai;ZHOU Zirong(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China;School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523000,China)
出处
《热加工工艺》
北大核心
2019年第3期137-139,144,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(U0934006)
广东省教育部产学研结合项目(2012B091100024)
广州市科技项目(2014J2200084)
关键词
液压成形
显微组织
位错密度
硬度
hydroforming
microstructure
dislocation density
hardness
