Full
Outline
The high strength and toughness BGX80 wire rod for submerged arc welding wire of X80 pipeline steel is independently researched, developed and designed by taking the composition, microstructure and performances of X80 pipeline steel of Baotou Steel as research basis combining with welding technology, weld structure and performance characteristics in the process of manufacturing pipe. Moreover, the change rules of its microstructure and mechanical properties are analyzed and studied by such means as CCT curve, tensile test and metallographic inspection. The results showed that the use of controlled rolling and delayed slow cooling technologies for steel wire rod for submerged arc welding wire of X80 pipeline steel in Morgan production line of Baotou Steel ensured the strength and toughness of wire rod.
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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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