冲击液压胀形下退火处理对H65黄铜管性能的影响  

Effect of annealing treatment on properties of H65 brass tube under liquid impact forming

作　　者：田丰硕 刘建伟[1,2] 张文袖[1] 赵鑫牛 TIAN Feng-shuo;LIU Jian-wei;ZHANG Wen-xiu;ZHAO Xin-niu(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China;National Demonstration Center for Experimental Education of Mechanical and Electrical Engineering Training,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004 [2]桂林电子科技大学机电综合工程训练国家级实验教学示范中心,广西桂林541004

出　　处：《塑性工程学报》2022年第7期66-73,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51765013);广西自然科学基金面上项目(2022GXNSFAA035586);桂林电子科技大学研究生教育创新计划资助项目(2020YCXS004)。

摘　　要：基于拉伸试验和冲击液压胀形技术,研究了不同退火工艺对H65黄铜管力学性能和成形性能的影响。首先,基于拉伸试验分析了不同退火工艺参数下管材的力学性能,结果表明,随着退火温度的升高,强度和硬度下降,塑性上升,保温时间对材料力学性能的影响较小。然后,从胀形高度、壁厚分布和圆角半径等方面分析了管材的胀形性能和填充性能,结果表明,随着退火温度的升高,破裂内压逐渐减小,胀形高度和壁厚减薄逐渐增大,壁厚分布均匀性和填充性能得到改善,保温时间对成形性能影响不大,但可通过适当延长保温时间来提高材料的成形性能。最后,综合考虑管材力学性能和成形性能的影响,确定退火温度450℃、保温时间60 min为较理想的退火工艺。The effect of different annealing processes on the mechanical properties and formability of H65 brass tube was studied based on tensile test and liquid impact hydroforming technology. Firstly, the mechanical properties of tubes with different annealing process parameters were analyzed based on tensile tests. The results show that with the increase of annealing temperature, the strength and hardness decrease and the plasticity increases. The effect of holding time on the material mechanical properties is small. Then, the bulging and filling properties of tubes were analyzed from the angles of bulging height, wall thickness distribution and fillet radius. The results show that with the increase of annealing temperature, the burst internal pressure decreases gradually, the bulging height and wall thickness thinning increase gradually, and the wall thickness distribution uniformity and filling performance are improved, the holding time has little effect on the formability. However, the formability of the material can be improved by extending the holding time appropriately. Finally, considering the effects of the mechanical properties and formability of the tubes, annealing temperature of 450 ℃ and holding time of 60 min are the ideal annealing process.

关 键 词：H65黄铜 冲击液压胀形 退火温度 力学性能 成形性能 

分 类 号：TG394[金属学及工艺—金属压力加工]