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| Quality Defect Analysis and Controlled Strategies of H Beam |
| DI Quan-kang1,3,SUN Qi-song1,CHENG Si-hua1,DING Ning1,LI Zhan-bin2,KANG Yong-lin3 |
1. Shougang Technology and Research Institute, Beijing 100043,China
2. Changgang Technology and Research Institute, Changzhi 046000, Shanxi, China
3. University of Science and Technology Beijing, Beijing 100083,China |
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Abstract The web crack, web pits, rotten steel flange and the R corner cracks of H-shaped steel beam blank rolling surface were tested by optical microscope observation, SEM observation and energy spectrum; the crack formation mechanism was also analyzed by means of ANSYS simulation of temperature field after profiled billet cogging. It is considered that H beam web crack formation is mainly related to the longitudinal angle beam blank R; the web surface is mainly connected with subcutaneous bubbles and furnace heating system; and black steel flange is mainly concerned with mould power; R corner cracks are related to large differences in stress caused by BD-Ur-E-Uf large temperature gradient in the rolling process. Measures were proposed accordingly.
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Received: 18 July 2011
Published: 16 January 2012
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2012, Vol. 31 
