Al_(10)Zn_(2.9)Mg_(1.7)Cu超高强铝合金的喷射成形制备研究

Research on Ultra-High Strength Al_(10)Zn_(2.9)Mg_(1.7)Cu Alloys from Spray Forming

采用喷射成形技术制备了Al1 0 Zn2 .9Mg1 .7Cu高强高韧铝合金沉积坯件 ,研究了喷射成形制备过程中各工艺参数对沉积坯件的成形性、显微组织、致密度的影响 ,确定了适当的工艺参数 ,研究了沉积坯件的热挤压及热处理工艺 ,对材料的组织进行了分析并对不同状态的材料性能进行了比较。研究结果表明 :当喷射成形工艺参数合理时 ,沉积坯件具有良好的成形性与致密度 ,在随后的热挤压过程中 ,通过较低的挤压比即可使材料达到全致密 ;通过对合金进行适当的热处理 ,材料的极限抗拉强度达到 810MPa ,同时延伸率保持在 8%～ 11% ,该材料是一种理想的轻质高强结构材料。

Ultra high strength Al 10 Zn 2.9 Mg 1.7 Cu alloys was produced by spray forming technology. The effect of the process parameters on the shaping, microstructures and density were studied, and the hot extrusion process and the heat treatment were studied also. The microstructures and resulting mechanical properties were evaluated and compared. The research results show that under suitable conditions the as deposited alloys have good forming properties and high denseity and could be compacted completely with low hot extrusion rates. After heat treatment, the tensile strength of spray deposited products could get up to 810 MPa, and the elongation rate is 8%～11%.