Influence of alloying elements content on microstructure of C82DA steel billet
LI Mao-yin1，LI Jing-she1，ZUO Xiao-tan2，YANG Shu-feng1，GAO wei1
（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China 2. Xinxing Ductile Iron Pipes Co.， Ltd.， Wuhu 241000， Anhui， China）
Abstract：The center segregation and porosity are common problems in C82DA steel billets resulting in a failure to meet the product quality rating. By combining the actual experiment and numerical simulation， the influences of superheat and alloying elements content on microstructure of billet are discussed separately. The methods of moving boundary is used to obtain the thickness growth rule of billet shell， and the microstructure of billets is numerically simulated using the CAFé method， and the simulation results agree reasonably well with the experimental data. It is found that low superheat is beneficial for the growth of equiaxed grain and the reduction of grain size；the effects of the content of alloying elements such as C，Si，Mn and Cr on the microstructure of billets have been studied， and the optimistic elements content are determined to optimizing the billets microstructure.
李茂印，李京社，左小坦，杨树峰，高 维. 合金元素含量对C82DA钢铸坯微观组织的影响[J]. 中国钢铁期刊网, 2017, 36(1): 57-63.
LI Mao-yin，LI Jing-she，ZUO Xiao-tan，YANG Shu-feng，GAO wei. Influence of alloying elements content on microstructure of C82DA steel billet. Chinese Journal of Iron and Steel, 2017, 36(1): 57-63.
2017, Vol. 36 
