采用粉末冶金法制备装甲用7039铝合金板材.原材料粉末经压制后挤压成板材.经T6热处理后,采用搅拌摩擦焊对板材进行双面焊接.研究焊接板的显微组织和显微硬度.结果表明,搅拌区的晶粒尺寸最小,硬度最低,分别为2～6 μm和HV 80.9.为研究焊接板的弹道性能,采用7.62 mm穿甲弹对基体、热影响区、热力影响区+搅拌区进行射击,获得了这些区域的弹道极限值(v50).基体、热力影响区+搅拌区和热影响区的弹道极限值(v50)分别比相同厚度普通板材的降低了14.7％、15.3％和17.9％.穿甲弹在装甲板上形成花瓣状和延性孔状失效.经挤压和颗粒增强后,热轧-冷轧可提高板材的弹道和力学性能.
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