Full
Outline
In order to investigate the effects of different rare earth additions and different heat treatment processes on the properties of rare earth protective steel BT700E, in the laboratory, the pilot test with rare earth alloy adding quantity 5 × 10-6, 10 × 10-6 and 15 × 10-6 are carried out, and different heat treatment systems are matched, and the heat treatment process with 880℃ quenching temperature and 560 ℃, 580 ℃ and 600 ℃ tempering temperature are respectively carried out. The effects of different rare earth additions and different heat treatment systems on the properties of test steels are compared, and results show that the 10 × 10-6 rare earth addition, 880 ℃ quenching + 580 ℃ tempering in heat treatment process, mechanical properties can meet the requirements of SSAB related technical specifications.
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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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