喷射成形制备Al-Zn-Mg-Cu系高强高韧铝合金的研究

Research on Ultra-high Strength Al-Zn-Mg-Cu Alloys with Spray Forming

采用喷射成形技术制备了Al Zn Mg Cu系高强高韧铝合金 ,对喷射成形工艺参数进行了优化 ,对沉积坯件的热挤压工艺、热处理工艺进行了探索 ,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。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 ;沉积坯件热挤压温度的降低有利于使材料获得更高的力学性能 ;同时 ,通过对合金热处理的优化 ,可以获得加工和使用性能更加优良的Al Zn Mg

Ultra high strength Al Zn Mg Cu alloys were produced by spray forming technology, and the process parameters were optimized. The hot extrusion process and the heat treatment were investigated. The microstructures and resulting mechanical properties were evaluated and compared. Under suitable conditions the as deposited alloys have good forming properties and high densis, and can be compacted completely with low hot extrusion rates. After heat treatment the spray deposited products exhibit ultra high mechanical properties.