论文部分内容阅读
为了探索高品质低成本车轮钢生产工艺,比较了两种二冷区冷却方式(气雾冷却和全水冷却)对车轮钢铸坯表面温度、凝固组织与宏观偏析的影响.结果表明:两种冷却方式下的二冷区矫直段铸坯表面温度均高于950℃,处于高温塑性区,可避免产生矫直裂纹;两种冷却方式均得到了均匀对称的凝固组织;虽然气雾冷却可略微增加等轴晶比例和降低铸坯中心偏析,但是使铸坯枝晶间距变得较为粗大,并且加重了1/2半径附近处的偏析,对随后的加工和成品的质量更为不利.综合考虑实验结果和生产成本,认为全水冷却方式更适合高品质车轮钢的生产.
In order to explore the production technology of high quality and low cost steel wheel steel, the effects of two cooling modes (aerosol cooling and full water cooling) on the surface temperature, solidification microstructure and macrosegregation of wheel steel slab were compared.The results showed that: Cooling surface of the second cooling zone straightening section billet surface temperature are higher than 950 ℃, in the high temperature plastic zone, to avoid straightening cracks; two cooling methods were uniform symmetry of the solidified structure; although the aerosol cooling can be Slightly increase the equiaxed grain ratio and reduce slab center segregation, but make the slab dendrite spacing become more coarser, and aggravate the segregation near 1/2 radius, which is more unfavorable for the subsequent processing and finished product quality. Considering the experimental results and production costs, it is considered that full water cooling is more suitable for the production of high quality wheel steel.