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The effects of pre-strain and baking on the microstructure and mechanical properties of QP980 cold rolled sheet were studied by means of universal tensile testing machine, pendulum impact testing machine, Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD). The results show that with the increase of pre-strain, the ultimate bending properties and impact properties of QP980 cold rolled sheet decrease After baking at 170 ℃ for 20 min, the impact properties of the material increase, and the Bake Hardening (BH) properties increase with the increase of pre-strain; X-ray diffraction analysis shows that baking does not cause phase transformation, and the carbon content in residual austenite decreases; Scanning analysis shows that the ductile fracture area in the impact fracture increases significantly after baking treatment.
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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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