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To address the issue of batch cracking of seat crossbeam parts stamped with 2 GPa hot forming material after welding, this article analyzed and found that this part was cracked caused by hydrogen embrittlement. Through tracing the parts process, it was found that hydrogen embrittlement cracking was caused by factors such as high heating temperature, long heating time, and long part transfer time. Through orthogonal design, different hot stamping process combinations of parts were improved to verify the prototyped parts, it was finally confirmed that for the 2 GPa hot formed parts with hot stamping process window in hot-formed austenitizing furnace, dew point temperature shall be under -5 ℃, heating time of 3~13 min, and heating temperature of 880~940 ℃.
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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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