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According to SEP1220-2 Standards, the resistance spot welding current process window of hot-dip galvanized DH600 steel plate with high formability was determined, and its welding process performance was comprehensively evaluated in combination with shear tensile test, cross tensile test, metallographic test, micro-hardness test and electrode life test. The results show that the new material shows better welding performance than traditional DP590. In the welding process window, with the increase of welding current, the nugget diameter increases, and the joint strength also increases. The microstructure of the weld nugget is lath Martensite, and no softening phenomenon is detected in heat affected zone. The electrode life test shows that the new material has good electrode wear resistance.
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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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