不同热处理状态下成形速率对2219铝合金成形极限的影响

发布时间：2019-04-25 13:41

【摘要】：分别对完全退火态和固溶淬火态2219铝合金板材进行准静态成形条件和电磁成形条件下的单向拉伸实验、平面应变实验和双向拉伸实验,建立了2219铝合金的成形极限图并研究了不同热处理状态下成形速率对2219铝合金成形极限的影响规律。结果表明,固溶淬火会显著提高2219铝合金的强度,降低2219铝合金的断后伸长率;准静态成形条件下,完全退火态2219铝合金在以上三种典型应变状态下的极限应变比固溶淬火态2219铝合金分别高14.76%、37.98%、39.54%;电磁成形条件下,完全退火态2219铝合金在以上三种典型应变状态下的极限应变比固溶淬火态2219铝合金分别高14.51%、38.03%、33.33%;完全退火态2219铝合金在电磁成形条件下以上三种典型应变状态下的极限应变比准静态成形条件下分别高16.08%、24.38%、18.76%;固溶淬火态2219铝合金在电磁成形条件下以上三种典型应变状态下的的极限应变比准静态成形条件下分别高16.34%、24.20%、30.94%,电磁成形可有效提高2219铝合金的成形极限,改善2219铝合金的成形性能。
[Abstract]:The uniaxial tensile test, plane strain test and biaxial tensile test of fully annealed and quenched 2219 aluminum alloy sheets under quasi-static forming conditions and electromagnetic forming conditions were carried out, respectively. The forming limit diagram of 2219 aluminum alloy was established and the influence of forming rate on the forming limit of 2219 aluminum alloy under different heat treatment conditions was studied. The results showed that the strength of 2219 aluminum alloy was significantly increased and the elongation at break of 2219 aluminum alloy was decreased by solution quenching. Under quasi-static forming conditions, the ultimate strain of fully annealed 2219 aluminum alloy is 14.76%, 37.98%, 39.54% higher than that of solid solution quenched 2219 aluminum alloy under the above three typical strain states, respectively. Under electromagnetic forming condition, the ultimate strain of fully annealed 2219 aluminum alloy is 14.51%, 38.03%, 33.33% higher than that of solid solution quenched 2219 aluminum alloy under the above three typical strain states, respectively. The ultimate strain of fully annealed 2219 aluminum alloy under electromagnetic forming is 16.08%, 24.38% and 18.76% higher than that of quasi-static forming respectively. The ultimate strain of 2219 aluminum alloy in solid solution quenched state under electromagnetic forming is 16.34%, 24.20% and 30.94% higher than that in quasi-static forming condition, respectively. Electromagnetic forming can effectively improve the forming limit of 2219 aluminum alloy and improve the forming properties of 2219 aluminum alloy.
【作者单位】：华中科技大学材料科学与工程学院材料成形与模具技术国家重点实验室;
【基金】：国家自然科学基金资助项目(51575206) 国家重点基础研究发展计划资助项目(2011CB012802) 中国航天科技集团公司航天科技创新基金资助项目(CASC150704) 中央高校基本科研业务费专项资金资助项目(2016YXZD055)
【分类号】：TG166.3;TG146.21

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