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添加少量的过渡族金属对铝合金的组织和性能有明显的影响。本文研究了锆(0.15％)、铁(0.1～0.3％)、铪和钇族稀土金属对Al—Zn—Mg—Cu系合金轧制半成品组织和性能的影响。在含锆、铪和稀土金属的合金中铁的含量均为0.1％。从轧制带材上切取15×200毫米的试片,将该试片从460℃于水(20℃)中淬火后进行双级时效。所有合金的一级时效制度为110℃保温8小时。二级时效的温度是174℃,时效时间各不相同。
Adding a small amount of transition metal will have a significant effect on the microstructure and properties of the aluminum alloy. The effects of zirconium (0.15%), iron (0.1-0.3%), hafnium and yttrium rare earth metals on the microstructure and properties of Al-Zn-Mg-Cu system alloys were investigated. The content of iron in alloys containing zirconium, hafnium and rare earth metals is 0.1%. A 15 × 200 mm test piece was cut from the rolled strip, and the test piece was quenched from 460 ° C in water (20 ° C) and then subjected to two-stage aging. The primary aging system for all alloys was 110 ° C for 8 hours. Secondary aging temperature is 174 ℃, aging time varies.