喷射成形高强铝合金方包套锻造致密化实验研究  

Experimental study on densification of spray-formed high-strength aluminum alloy by square cladding forging

作　　者：许春停[1] 许兵 石文超[2] 薛克敏[2] XU Chun-ting;XU Bing;SHI Wen-chao;XUE Ke-min(No.38 Research Institute of CETC,Hefei 230009,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230009 [2]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《塑性工程学报》2021年第6期136-142,共7页Journal of Plasticity Engineering

基　　金：装备预研共用技术基金资助项目;安徽省重点研发计划项目(201904a05020062)。

摘　　要：为提高喷射成形沉积态锭坯的致密度及力学性能,开展了方包套锻造实验及T6热处理实验,分析了不同方包套材料及厚度对致密度和力学性能的影响规律。结果表明,方包套材料选用45钢时比选用7075铝合金时的焊接性能和锻造成形性好。与厚度为3 mm的方包套相比,厚度为5 mm的方包套在锻造过程中与坯料贴合紧密,变形相对较均匀。喷射沉积态锭坯致密度、抗拉强度和伸长率分别为90.61%、285.33 MPa和4.6%。喷射成形铝合金经过方包套锻造后,致密度均大于99%。经材料为45钢、厚度为3 mm的方包套锻造后,喷射成形沉积态铝合金抗拉强度和伸长率分别提升至397.2 MPa和6.1%,再经T6态处理(双级固溶450℃/2 h+475℃/2 h,时效120℃/24 h)后,铝合金的抗拉强度和伸长率分别达到607.95 MPa和5.2%。To improve the density and mechanical properties of spray-formed deposited ingot blank,the square cladding forging experiment and T6 heat treatment experiment were carried out. The effect of different square cladding materials and thicknesses on density and mechanical properties were analyzed. The results show that when 45 steel is selected as the square cladding material,the welding property and forging formability is better than 7075 aluminum alloy. Compared with the square cladding with thickness of 3 mm,the square cladding with thickness of 5 mm fits tightly with the blank in the forging process,and the deformation is relatively uniform. The density,tensile strength and elongation of the deposited ingot blank are 90. 61%,285. 33 MPa and 4. 6%,respectively. The density of the sprayformed aluminum alloy after forging is greater than 99%. After forged with square cladding with material of 45 steel and thickness of3 mm,the tensile strength and elongation of the spray-formed deposited aluminum alloy are increased to 397. 2 MPa and 6. 1%,respectively. After T6 treatment( double-stage solid solution by 450 ℃/2 h + 475 ℃/2 h and aging by 120 ℃/24 h),the tensile strength and elongation of aluminum alloy are 607. 95 MPa and 5. 2%,respectively.

关 键 词：喷射成形 高强铝合金 方包套锻造 致密度 力学性能 

分 类 号：TG376.2[金属学及工艺—金属压力加工]