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In this paper, the products of 685 and Armox 500T, armor plate BTP500 are selected to compare and analyze. The results showed that the microstructure of armor plate BTP500 produced by Baotou Steel was tempered martensite, original austenite grain was fine, average grain size was 10.5 μm and grain size was uniform. The average hardness of BTP500 steel plate (HBW) is 291~296, which is about 30 higher than that of 685 steel plate. The mechanical performance indexes could fully reach the levels of Armox 500T protective plate, average low-temperature impact absorbing energy at -40 ℃ is 51.6 J, which is higher than that of Armox 500T. The BTP500 steel plate is still with good bullet proof property in the case that it is thinner, which provides the ideal protective material for lightweight of armored vehicles.
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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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