|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Thermodynamic Applications, Optimizations and Simulations in High-Temperature Processes: An EPD Symposium in Honor of Christopher W. Bale's 70th Birthday
||NN-6: Effect of Dendritic Morphology and Central Segregation of High-Carbon Steel Billet on the Mechanical Property of the Hot-Rolled Wire Rods
||Yuan Ji, Haiyan Tang, Yujun Li, Shaoxiang Li, Xiaofeng Zhang, Chengjia Shang, Jiaquan Zhang
|On-Site Speaker (Planned)
Microscopic dendritic morphology and central mac-segregation in continuously cast of high-carbon steel billets were investigated to establish their heredity effect on the mechanical property of the following hot-rolled wire rods. The billets of 150 mm square and the wire rods whose sizes were 10 mm and 6.5 mm in diameter respectively were collected from Xuanhua Steel, China. Experimental observations and numerical simulations of the billets which were produced under different casting parameters during solidification were carried out. The secondary dendrite arm spacing (SDAS) increases with the increment of superheat temperature and casting speed, while decreases with the increasing specific water flow. The smaller the SDAS at the center gets, the lower the extent of segregation of carbon (rC) and manganese (rMn) is, due to the reduced permeability. rMn is linearly correlated with rC. In addition, the more carbon segregates into the center of billets, the worse the stability of the mechanical property of the rods becomes. Attributed to the heredity, Thermo Mechanical Control Process (TMCP) should be used together with Billet Center-segregation-controlling (BCSC) to substantially improve the overall properties of rolled products.
||Planned: TMS Journal: Metallurgical and Materials Transactions