Method for representing transmission behavior in molten pool in double-roller cast rolling process

Abstract

The invention provides a method for representing a transmission behavior in a molten pool in the double-roller cast rolling process, which comprises the steps of continuously injecting liquid metal into the molten pool, and putting a tracing base material along the working face of a crystallization roller, wherein the tracing base material is used for releasing tracing particles in the molten pool, and a phase interface is formed between the tracing base material and the liquid metal; driving the tracing base material to migrate to a solidification interface of the liquid metal by utilizing the crystallization roller; before the tracing base material completely passes through the solidification interface, enabling the rotating speed of the crystallization roller to be suddenly reduced to zero, meanwhile, stopping injection of the liquid metal into the molten pool, enabling the liquid metal in the molten pool to be suddenly cooled to be solidified to form a cast ingot, and taking the cast ingot out of the molten pool; sectioning the cast ingot to form a section exposing and diffusing the tracer particles into the cast ingot; and obtaining information about the transmission behavior of the cast-rolled metal in the molten pool by utilizing the diffusion condition of the tracer particles in the cast ingot. Based on the transmission behavior information, the defect forming mechanism is conveniently utilized to adjust the process parameters of double-roll casting and rolling, the product quality can be improved, and the effect of efficiently optimizing the double-roll casting and rolling process is achieved.

Description

technical field [0001] The invention belongs to the field of twin-roll casting and rolling, and in particular relates to a method for characterizing the transmission behavior in a molten pool during twin-roll casting and rolling. Background technique [0002] Twin-roll casting and rolling is an important method for producing thin metal strips. This method has achieved great commercial success in both non-ferrous metals and steel materials. As a preparation process with solidification as the ultimate goal, the principle is to inject molten metal into the molten pool surrounded by counter-rotating crystallization rollers and side sealing plates through the flow distribution system. The side sealing plates are generally made of refractory materials. Crystallization Water cooling inside the roller. The molten metal in the molten pool cools down on the surface of the counter-rotating crystallization rolls, and the average cooling rate of twin-roll casting is close to 1000 °C / s. ...

AI Technical Summary

Problems solved by technology

[0003] According to the existing processing experience, most of the instabilities of the twin-roll casting and rolling process are caused by the transmission behavior of uneven heat flow in the molten pool that realizes the casting and rolling function

However, due to the unique structure of the twin-roll casting equipment and the lack of experimental means, the molten pool that realizes the casting function is like a "black box". Although the twin-roll casting has been proposed for more than 160 years, it is internationally recognized , there is no accurate and intuitive way to characterize the transport behavior in the molten pool

Images