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A series of low temperature impact tests are required for the welding experiment of BT620QL6 low temperature crack arrest steel plate so that multiple times of preparation and processing for impact samples of test piece for welding are needed. The slotting positions of welded samples cannot be ensured to be precise in welding heat affected zone so that the welding impact test results could be influenced and fluctuations of series of low temperature impact absorbing energy are greater with traditional processing method of impact sample. In the paper, the slotting positions of impact sample notch of welded plate are determined, uniformity and continuity of machining dimension precision for samples in the same group are ensured, sensitivity of welded impact samples on sampling positions is eliminated as well as preparation efficiency of sample for welded plate is improved through improving the processing method of sample for welded plate combining with the standard requirements of test sample for welded plate. The test results showed that the stability of data for impact property of BT620QL6 welded plates was improved with the improved processing method of impact sample.
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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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