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固溶處理對Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd合金組織和力學性能的影響
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-09-28
通過金相顯微鏡(OM)、掃描電鏡(SEM)、示差掃描量熱法(DSC)和室溫拉伸性能測試等方法，研究固溶處理對新型高強耐熱鋁合金Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd合金組織和力學性能的影響。
固溶處理對Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd合金組織和力學性能的影響Effects of solution treatment on microstructures andmechanical properties of Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd aluminum alloy
通過金相顯微鏡(OM)、掃描電鏡(SEM)、示差掃描量熱法(DSC)和室溫拉伸性能測試等方法，研究固溶處理對新型高強耐熱鋁合金Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd合金組織和力學性能的影響。結果表明：當固溶溫度由510 ℃升高到525 ℃時，更多的初生相回溶至基體；當固溶溫度繼續升至530 ℃時，初生相則未進一步回溶，而再結晶晶粒的尺寸持續加劇，導致合金軟化程度增加；合金的力學性能由時效強化和固溶軟化共同影響，該合金優化的固溶處理制度為525 ℃、2 h，經(525 ℃，2 h)+(185 ℃，7 h)峰時效處理后，合金抗拉強度、屈服強度和伸長率分別為608 MPa、587 MPa和10.4%。
The effects of solution treatment on the microstructures and mechanical properties of new high-strength heat-resistant Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd aluminum alloy were studied by OM, SEM, DSC and room temperature tensile test. The results show that, as the solution temperature increases from 510 ℃ to 525 ℃, the primary phases dissolve in matrix.The amount of primary phase has no change with temperature increasing to530 ℃.But the size increase of the recrystallized particles gradually leads to the increase of alloy softening. The mechanical properties of aged alloy are determined by precipitation strengthening and solution softening, and the suitable solution treatment for Al-5.8Cu-0.6Mg-0.6Ag-0.3Nd alloy is525 ℃ for 2 h. After the solution and peak aging of (525 ℃, 2 h)+(185 ℃, 7 h), the ultimate tensile strength, yield strength and elongation of the aluminum alloyare 608 MPa,587 MPa and 10.4%, respectively.
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