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Outline
In this paper, the key technology of a new generation of cold-rolled fatigue-resistant glassed steel for inner container is described. The chemical composition and cover annealing process of cold-rolled low carbon plate are designed as well as the mechanical properties and metallographic structure of the cold-rolled plate prepared are analyzed. The experimental steel plate is made into inner container of water heater as well as the enamel and bulge tests are carried out. The results showed that the fatigue resistance of inner container of water heater was significantly improved and the times of pressuring could reach more than 150 000 when the mechanical properties of the cold-rolled steel plate were controlled at yield strength of 220~270 MPa, elongation≥38% by adding proper amount of Nb and rare earth element as well as with the annealing process so that it is with good enamel property, stamping formability and fatigue resistance.
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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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