Q550D凝固坯壳厚度测定研究  

Research on Measurement of Q550D Steel Solidified Slab Shell Thickness

作　　者：李鹏飞 王明林[1] 张振学 张慧[1] LI Pengfei;WANG Minglin;ZHANG Zhenxue;ZHANG Hui(National Engineering Research Center of Continuous Casting Technology,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《热加工工艺》2019年第1期98-102,共5页Hot Working Technology

摘　　要：为了精确掌握连铸机的综合冷却特性,优化二次冷却制度及连铸轻压下过程,结合Q550D钢生产过程中二冷各段的实际情况,采用射钉法在二冷区各段末对铸坯进行射钉取样,并利用硫印法测定铸坯在二冷区内各目标点凝固坯壳厚度。使用模拟软件建立板坯传热数学模型,与射钉实验结果进行比较,两者结果基本相符。将数学模型应用到整个铸机的传热凝固过程中,为评价连铸机综合冷却能力,优化二冷配水及轻压下制度,提高铸坯质量,为实现高效连铸提供了重要依据。In order to master comprehensive cooling characteristics of the casting machine and optimize secondary cooling system and continuous casting soft reduction system, combined with the actual situation of each section of Q550 D secondary cooling in the production process, the slab was sampled at the end of each section in the secondary cooling zone by pin-shooting method, and the thickness of each target in the secondary cooling zone of the solidified shell was measured by the sulfur printing method. Simulation software was used to establish mathematic model of heat transfer of the slab, and the result of the calculation was consistent with that of pin-shooting method. The mathematic model was applied to the heat transfer and solidification process of continuous casting, which provided an important basis for evaluating the comprehensive cooling capacity of continuous casting machine, optimizing secondary cooling system and soft reduction system, improving the quality of slab and realizing high-efficiency continuous casting.

关 键 词：射钉法 坯壳厚度 数学模型 

分 类 号：TG244[金属学及工艺—铸造]