论文部分内容阅读
提出了一种在结晶器弯月面上方涂敷热障涂层,来抑制弯月面传热,进而控制铸坯振痕形成的新方法,称为弯月面热障涂层方法(TBCMM).利用模拟结晶器弯月面一维传热的测试装置,研究了热障涂层在结晶器弯月面的不同位置对传热的影响规律,分析了热障涂层抑制振痕形成的机理;在浸铸式连铸模拟机上,分别进行了结晶器有、无热障涂层的低熔点Sn-12.5%Pb合金的模拟连铸实验,获得了实测的弯月面温度波动曲线和铸坯,对比分析了弯月面热流和铸坯表面振痕形貌,证实了提出的TBCMM的有效性;最后,在中试实验连铸机上,研究了热障涂层对钢连铸坯表面质量的影响,获得了表面振痕减轻甚至消除的连铸钢坯.
A new method of coating the thermal barrier coating on the mold meniscus to suppress the meniscus heat transfer and thus the formation of oscillation marks of the slab is proposed, which is called the meniscus thermal barrier coating (TBCMM) The influence of thermal barrier coating on the heat transfer at different positions of the mold meniscus was studied by using the one-dimensional heat transfer test device of simulated mold meniscus, and the mechanism of thermal barrier coating inhibiting the formation of vibration marks In the continuous casting simulator, the simulated continuous casting experiment of low melting point Sn-12.5% Pb alloy with or without thermal barrier coating was carried out respectively, and the measured meniscus temperature fluctuation curve and slab , The meniscus heat flow and the surface flaw appearance of the billet were compared and analyzed, and the validity of the proposed TBCMM was confirmed. Finally, the effects of the thermal barrier coating on the surface quality of the steel slab Impact, obtain the surface vibration reduction or even elimination of continuous casting billet.