采用4mm厚的5A03-H铝合金板材作为基材,利用无倾角成形工具,进行搅拌摩擦增材制造工艺实验,研究工艺参数对增材区成形的影响.结果表明:随着行进速度提高,单道增材宽度、界面迁移高度和迁移宽度值均减小.当行进速度为60mm/min时,界面迁移量较小,单道增材宽度较大.增材间距大时,会有两道次间的未结合界面和迁移界面缺陷;随间距减小,未结合界面逐渐转变成迁移界面;当间距达到某个值时,迁移界面消失.为了得到成形良好的增材区,必须优化增材加工的间距.逆向增材与同向增材相比,能有效地抑制并消除向增材区中心迁移的界面,因此可获得较大的有效增材宽度.
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