Abstract:Combined with the production practice, analyzing the sample of the fractured slab by the spectrum, low magnification, scanning electron microscopy and energy spectrum. As analysis: the internal crack of slab is directly causes of steel 45 horizontal brittle fracture, while too fast cooling rate to a big slab of internal stress or contraction of a larger mechanical external force during the process of being lifted is the main external causes of horizontal slab brittle off; at the same time, the impact on columnar crystal growth by uneven secondary cooling, and caused segregation, porosity and enriched inclusions of the elements. Theses are the main reasons of internal cracks of slab.
朱杰 王新志 李力 厚健龙. 45号钢延迟断坯事故分析与研究[J]. 中国冶金, 2010, 20(5): 25-25.
. Analysis and Study of Delay Fractured Slab of Steel 45. China Metallurgy, 2010, 20(5): 25-25.