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| High Temperature Mechanical Properties of P-Containing High Strength IF Steel |
Yongqi YAN,Heng CUI( ),Zheng WANG,Aimin ZHAO |
| Engineering Research Institute, University of Science and Technology Beijing, Beijing100083, China |
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Cite this article:
Yongqi YAN,Heng CUI,Zheng WANG,Aimin ZHAO. High Temperature Mechanical Properties of P-Containing High Strength IF Steel. Chinese Journal of Materials Research, 2015, 29(8): 602-606.
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Abstract The high temperature mechanical properties of P-contained high strength interstitial free (IF) steel were investigated using Gleeble3500 thermal simulation testing machine, in terms of zero ductility temperature (ZDT), zero strength temperature (ZST) and the relationship of tensile strength with temperature. The fractured surfaces at different tensile temperatures were characterized by means of scanning electron microscope. The phase transition temperature interval was deduced by the THERMO-CALC software. The results show that the ZDT and ZST of the steel are 1420℃ and 1445℃, respectively. The brittleness temperature interval Ⅰ is from 1400℃ to the melting point, and there is no the brittleness temperature interval Ⅲ. The transverse cracks on the surface of casting blank did not occur during the straightening process. The tensile strengths decrease with the increasing temperature in the test temperature range, and which are lower than 5.3 MPa above 1300℃. The result of THERMO-CALC calculation shows that, with the specimens cooling from 500℃ to 400℃, Fe3P precipitates out in the α-Fe matrix, which may results in cold short. The transverse cracks on the continuous casing (CC) slab could dramatically be reduced by Hot-charging Technology.
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Received: 28 December 2014
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| Fund: *Supported by Beijing Higher Education Young Elite Teacher Project No. YETP0411 and Fundamental Research Funds for the Central Universities No. FRF-TP-14-102A2. |
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