A strip-casting simulator has been successfully developed to simulate the initial contacting conditions between the twin roller and melt during the strip-casting process, in which the peak/average heat flux, secondary dendrite arm space and cooling rate of the martensitic strip cast are similar to those observed in the actual strip caster. During the casting experiments, a layer of dark deposited film can be found on the substrate, whose composition is 69.66Mn-15.36O-11.03Fe-3.95Si (wt.%). The deposited film starts to melt during the 5th immersion experiment and the melting area of the film increases with the repeat of the immersion test. The presence of solid deposited film first impairs the interfacial heat transfer; however, with the accumulation of the deposited film, melting of the film occurs that enhances the interfacial heat fluxes due to the improved melt/substrate interfacial contact, as the cavities or air pockets between the melt and the substrate are gradually filled with the increasing of the melting area of the deposited film. Compared with substrate roughness, the effect of the deposited film on heat transfer is more significant.

中文翻译：

---

马氏体钢带材连铸过程中自然沉积膜的形成及其对界面传热的影响

成功开发了带铸模拟器，模拟了带铸过程中双辊与熔体的初始接触条件，其中马氏体带铸的峰值/平均热通量、二次枝晶臂间距和冷却速度为类似于在实际带钢连铸机中观察到的情况。在浇铸实验中，可以在基板上发现一层深色沉积膜，其成分为69.66Mn-15.36O-11.03Fe-3.95Si（wt.%）。沉积的薄膜在第 5 次浸泡实验期间开始熔化，薄膜的熔化面积随着浸泡测试的重复而增加。固体沉积膜的存在首先削弱了界面传热；然而，随着沉积膜的积累，由于熔体/基材界面接触的改善，膜的熔化会增强界面热通量，因为随着沉积膜的熔化面积的增加，熔体和基材之间的空腔或气穴逐渐填充。与衬底粗糙度相比，沉积膜对传热的影响更为显着。