1.Institute of Materials and Metallurgy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan,China; 2.Department for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081,China
Abstract��Hot delivering, hot charging and reheating of a Ti microalloyed steel slab at different delivery temperatures have been simulated in laboratory. The microstructure morphologies of the onsite slab and intermediate slab, as well as that of the specimen of laboratory slab with different thermal histories have been observed by using optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The reason of the slab surface transverse cracking during rough rolling following hot delivering and hot charging has been analyzed. The results show that the allotriomorphic ferrite at the original austenite grain boundary and the precipitation of carbonitrides along the original austenite grain boundary in the slab surface region might be the main causes for the slab surface cracking during rough rolling.
������;�ƹ㲨;��Ӣ��;������;������. ������װTi�Ͻ��������������������Ƴ������[J]. �й������ڿ���, 2009, 27(4): 4-0.
WU Xiu��yue;TANG Guang��bo;PEI Ying��hao;PENG Ning��qi;LIU Zheng��dong. Causes Analysis of Surface Cracking on Ti��microalloyed Steel Slab during Rough Rolling. Chinese Journal of Iron and Steel, 2009, 27(4): 4-0.
2009, Vol. 27 
