| 杨明,杨学均,高爽,高彤,黄永哲.时效制度对高强度薄壁6XXX系铝合金力学性能的影响[J].有色金属材料与工程,2023,44(1):64-68. |
| 时效制度对高强度薄壁6XXX系铝合金力学性能的影响 |
| Effect of aging systems on mechanical properties of high strength thin wall 6XXX series aluminum alloy |
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| DOI：10.13258/j.cnki.nmme.2023.01.009 |
| 中文关键词: 6XXX系铝合金 时效制度 力学性能 微观组织 |
| 英文关键词:6XXX series aluminum alloy aging system mechanical properties microstructure |
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| 中文摘要: |
| 通过控制挤压工艺改善铝合金的流动性，挤压生产出6XXX系薄壁复杂截面型材。探究不同的时效制度对此类产品力学性能的影响，对最优时效制度下制备的型材的长期及短期热稳定性能、折弯性能及显微组织进行表征。结果表明：型材经150 ℃×4 h+175 ℃×8 h时效后的力学性能最优，屈服强度为340～380 MPa，抗拉强度为390～410 MPa，伸长率为10%～12%，长期及短期热稳定性较好，但折弯角度相对较低。横向基体晶粒度等级为6级，无边部皮质层，纵向纤维状晶粒晶界清晰平直。 |
| 英文摘要: |
| By controlling the extrusion process to improve the fluidity of high composition aluminum alloy, 6XXX series thin-wall complex cross-section profiles were produced. The effects of different aging systems on the mechanical properties of such products were investigated, and the long-term and short-term thermal stability, bending properties and microstructure of the profiles were characterized by the optimal aging system. The results show that the mechanical properties of the thin-walled multicavity material extruded by 6XXX series high composition alloy are the best after aging at 150 ℃ for 4 h and 175 ℃ for 8 h. Its yield strength is 340-380 MPa, tensile strength is 390-410 MPa, elongation is 10%-12%, long-term and short-term thermal stability is good, but the bending angle is relatively low. The grain size of transverse matrix is grade 6, without edge cortex layer, and the grain boundary of longitudinal fibrous grain is clear and straight. |
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