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Bake-Hardenability of Al-Mg-Cu-X (Ag,Zn,Si) Alloy Sheets

机译:Al-Mg-Cu-X(Ag,Zn,Si)合金薄板的烘烤硬化性

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摘要

Age-hardening behaviours of Al-3%Mg-1%Cu (in mass%) alloys with and without Ag, Znrnand Si were investigated. The Al-Mg-Cu ternary alloy showed two-stage hardening atrn170℃; I.e. the first rapid hardening within 2min and the second hardening after 2000min.rnThe addition of 0.4%Ag accelerated the age-hardening in both the stages. Precipitates inrnthe Ag-bearing alloys were much finer than those of the Ag-free alloys after peak-ageing.rn0.4%Zn and 0.4%Si additions were less effective than Ag in improving the strengths atrnshorter ageing times. The yield strength after bake-hardening treatment was improved notrnonly by Ag addition but also by an optimized heat-treatment.
机译:研究了含,不含银,锌和硅的Al-3%Mg-1%Cu(质量%)合金的时效硬化行为。 Al-Mg-Cu三元合金在170℃有两阶段的硬化。即第一次快速硬化在2分钟内,第二次硬化在2000分钟后。rn添加0.4%Ag加速了两个阶段的时效。峰值时效后,含Ag合金中的沉淀物比不含Ag的合金细得多。添加0.4%Zn和0.4%Si的效果不如Ag在短时效时提高强度。烘烤硬化处理后的屈服强度不仅可以通过添加银来提高,而且可以通过优化的热处理来提高。

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