Research on hot rolling process of SN400B steel used for high-performance building structure
In light of the technical conditions of SN400B steel used for high performance building structure of a certain user,and in combination with the high demand application of this steel,the composition and hot rolling process design were carried out.Key parameters such as the baking temperature,the final rolling temperature,the coiling temperature,the temperature difference between final rolling and coiling and the laminar cooling mode were analyzed and optimized.It is concluded that:①higher temperature can improve the strength but not the elongation;②the larger the temperature difference between final rolling and coiling,the higher the strength and the lower the elongation;③intensive cooling results in higher strength and lower plasticity,whereas general cooling provides a balanced performance between strength and plasticity.
steel used for high-performance building structureSN400Bcoolingyield ratioelongation at break
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