Full
Outline
The hot rolled coil for drill pipe of high strength rotary drilling rig is successfully developed on the 2 250 mm hot continuous rolling production line of Baotou Steel with the component design of low carbon and niobium titanium microalloying as well as controlled rolling and cooling process. Its yield strength is not less than 550 MPa, tensile strength is not less than 650 MPa, percentage elongation after fracture is not less than 25%, longitudinal full-size impact energy is not less than 100 J at -20 ℃ as well as the matching of strength and toughness is good. Moreover, it is with good low temperature impact performance, cold bending performance and welding performance so that it could meet the technical requirements of hot rolled coil for drill pipe of rotary drilling rig for customers as well as its batch production and supply are realized in Baotou Steel.
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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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