锻造工艺对大规格2219铝合金锻环综合力学性能的影响  

Influence of forging process on comprehensive mechanical properties for large-size 2219 aluminum alloy forging rings

作　　者：王博 边颖帅 岳战国 王亚安 郭小敏 刘建林 李艳 Wang Bo;Bian Yingshuai;Yue Zhanguo;Wang Ya'an;Guo Xiaomin;Liu Jianlin;Li Yan(Forging Factory,Xi′an Aviation Brake Technology Co.,Ltd.,Xingping 713100,China)

机构地区：[1]西安航空制动科技有限公司锻造厂,陕西兴平713100

出　　处：《锻压技术》2023年第11期35-39,共5页Forging & Stamping Technology

摘　　要：采用1 t电液自由锻锤制备了大规格2219铝合金锻环(Φ690 mm×Φ448 mm×75 mm),研究了2219铝合金锻环的不同锻造工艺,检测了锻环切向、径向以及轴向的室温力学性能,分析了不同锻造工艺下的总锻造比对锻环抗拉强度、规定非比例延伸强度和伸长率的影响。结果表明:随总锻造比增大,锻环的切向、径向以及轴向的抗拉强度先增加后趋于稳定,规定非比例延伸强度和伸长率先增加后减小,因此,适当地增加总锻造比有利于提高锻环的综合力学性能。当采用对原料进行径向十字锻造后,再进行连续镦粗、冲孔、扩孔以及T6态热处理的工艺方案,其总锻造比为9.8,制备得到的大规格2219铝合金锻环的综合力学性能最优,且远超GJB 2057A—2018中的要求。The large-size 2219 aluminium alloy forging rings(Φ690 mm×Φ448 mm×75 mm)was prepared by 1 t electro-hydraulic free forging hammer,and the different forging processes of 2219 aluminum alloy forging rings were studied.Then,the tangential,radial and axial mechanical properties of forging rings at room temperature were detected,and the influences of total forging ratio on tensile strength,specified non-proportional extension strength and elongation of forging rings under different processes were analyzed.The results show that with the increasing of the total forging ratio,the tensile strengths in the tangential,radial and axial directions increase first and then become stable,and the specified non-proportional extension strength and elongation increase first and then decrease.Thus,appropriately increasing the total forging ratio is conducive to improve the comprehensive mechanical properties of forging rings.When the process scheme that the raw material was first processed by radial cross forging and then upsetting,punching,hole expansion and T6 state heat treatment was used,its total forging ratio is 9.8,the comprehensive mechanical properties of the prepared large-size 2219 aluminum alloy forging rings are optimal and far exceed the requirements in GJB 2057A—2018.

关 键 词：2219铝合金 锻造工艺 力学性能 锻造比 锻环 

分 类 号：TG319[金属学及工艺—金属压力加工]