Full
Outline
In order to improve product quality, the steel-making process of 70 high carbon steel is optimized and improved by Baotou Steel. The results showed that the slab quality was significantly improved, levels of centre burst, center porosity and defect of non-metallic inclusions were all not over grade 0.5, proportion of columnar crystal was smaller and its texture was dense; the enrichment and segregation of carbon element in the center of casting blank of 70 steel were effectively reduced, central carbon segregation index decreased from 1.10 to 1.03 and no large-grained non-metallic inclusions were found in casting blank after the process optimization; the drawing fracture of wire rod was effectively suppressed and drawing property was significantly improved after the improvement.
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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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