Abstract
In the article there are presented the stages of improvement of the process of continuous casting. It is revealed, that at the each stage of technological improvement of the process of continuous casting, the damage parameters of billets were reduced. Improvement of the process of continuous casting leads to the improvement of the mechanical properties of the billets and the performance of continuous casting machines. The first stage is shown as the process of transition of the number of experimental developments into quality, during which the casting of billets passed from an unstable process to a stable one. The second stage is characterized by the creation of new improved continuous casting processes. So, besides the existing machines of the vertical type, radial, curvilinear and horizontal casting machines were invented. By the end of the twentieth century, this technological process reached the limit of the possibilities for increasing the quality of performs, and the productivity of continuous casting machines. It is shown that the third stage is intended for continuous casting of copper alloys and is based on the influence of the frequency of the movement of the billets and the reverse movement of the perform during overcoming the static friction force. It was determined that for the frequency of movement of billets made of copper alloys, which are in the range of 2.5...7.5 min-1, the direction of its movement during overcoming the static friction affects the mechanical properties of the billet. The fourth stage - causes an increase in the mechanical properties of the billet due to the use of inertia forces in the alternating movement of the billet. It was revealed that at the fourth stage the mechanical properties of the billets increased most effectively, and the linear performance increased from 0.4...0.8 to 2.5...4.0 m/min, and in some cases to 5.0...7.0 m/min.
Highlights
The process of continuous casting is gaining immense popularity
Reducing the damage parameter allows you to change the rheological state of the billet, which allows you to improve the mechanical properties of the billet, and this in turn allows you to improve the performance of the continuous casting machine
Based on the analysis of the stages of improvement of the billets, the stages of technological improvement of the process of continuous casting of iron-carbon and copper billets, we can draw the following conclusions: 1. It is shown that, each stage of the improvement of the continuous casting process is associated with a decrease in the damage parameter, which in turn led to an increase in the mechanical properties of the billets, which in turn increased the linear productivity
Summary
The process of continuous casting is gaining immense popularity. For example, in 1990, when analyzing the usability of this process, it was shown that in all industrialized countries, from 88 to 95% of all the smelted metal and alloys were cast on continuous casting machines. Today many scientific researchers of continuous casting are concern with the ways of improvement of the mechanical properties of the billets, which lead to high linear productivity of continuous casting machines without reducing the quality of the billets. These and other similar questions determined the relevance of this study and prompted to analyze the entire history of improving the continuous casting process from the point of view of the development of technological capabilities of the continuous casting process, which arose in parallel with the development of the science of damage to materials, namely the theory of continual damage. We propose to divide the entire path of development of the continuous casting process from its origin to the present day into four stages
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