Wear of the mold sleeve during operation in production

This paper presents the results of a study of the damageability and wear of mold sleeves of a section continuous casting ma-chine (CCM) when casting in an industrial environment. Typically, wear occurs at the bottom of the wide wall at the farthest from the corners. The amount of steel poured through the mold liner inevitably has an intense thermal and mechanical effect on it. And gradually the geometry of its inner working surface changes, as a result of which the quality of the continuously cast billet deteriorates and after a certain number of melts the sleeve has to be taken out of service. The reasons for the failure of a liner can be dif- ferent and depend on a number of factors. The this article several types of sleeves with different of the working cavity. All sleeves divided into 3 groups and the change in geometric and warpage of the studied. MCS-3000 of areas of erosion is the insufficient adhesion strength of the chrome coating to the copper base. The areas of erosional destruction are associated with deep risks that penetrate deeply through the coating and the base material of the liner. It is also possible to associate the appearance of deep shells with ragged edges, close in shape to a circle, with violations of technology. In turn, when using a multilayer sleeve manufactured by "Kobelco", the durability of 780 heats, with uniform wear of the corner regions in the sleeve, authors of the article did not observe wear on the edges of the sleeve. These sleeves were operated without visible disturbances in the continuous casting process and showed an expected high durability. Thus, it was concluded that, subject to the technology, it is possible to significantly increase the resource of the liners. And also, in addition to the direct technological process, the personnel play an important role, on whose negligence the service life of the liners also depends.