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To stabilize mechanical property of automotive structural components made of 7-series extruded aluminum alloy, and enhance the finished product rate for subsequent deep processing, this study uses the 7108 extruded aluminum alloy profile of the structural part for new energy vehicles as the test material, conducts three stages of processing, including natural aging, pre-aging and pre-aging + artificial aging, and confirms the influence of the optimal pre-aging system and pre-aging of 7108 extruded aluminum alloy profile of automotive structural part on the mechanical properties and intergranular corrosion resistance of subsequent artificial aging. The results indicate that pre-aging can effectively control the increase in mechanical properties of 7108 aluminum alloy profiles under natural conditions, thereby improving the machinability of the product.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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