Long-life combined chamfered crystallizer narrow-faced copper plate for continuous slab casting

Abstract

The invention discloses a long-life combined chamfered crystallizer narrow-faced copper plate for continuous slab casting, which relates to the field of metal solidification and continuous casting. The chamfered crystallizer narrow-faced copper plate (1) comprises two chamfered planes. The chamfered crystallizer narrow-faced copper plate (1) is characterized in that a first triangular diagonal plane (4) and a second triangular diagonal plane (5) are respectively cut from B points (which are 20mm to 700mm from E points of lower ports) of a first chamfered plane (2) and a second chamfered plane (3) to the lower ports, and a continuous casting slab shell is separated from the contact with the copper plate at the parts gradually while passing through the first diagonal plane (4) and the second diagonal plane (5), so that the abrasion of the continuous casting slab shell to the copper plate is reduced, and the service life of the chamfered crystallizer narrow-faced copper plate is prolonged.

Description

technical field [0001] The invention relates to the field of metal solidification and continuous casting, in particular to a long-life combined slab continuous casting chamfering crystallizer narrow-faced copper plate. Background technique [0002] The defect of transverse cracks at the corners of the slab surface in right-angle continuous casting has always been one of the important problems that plague the continuous casting of micro-alloy steel. To solve this problem, people have developed a slab continuous casting chamfering crystallizer. The right angle of the continuous casting slab becomes an obtuse angle, so that the two-dimensional heat transfer at the corner becomes nearly one-dimensional heat transfer, thereby greatly increasing the temperature at the corner of the continuous casting slab in the straightening area, making it avoid the steel at 600- The high-temperature brittle zone in the temperature range of 900 ° C, so the transverse cracks at the corners of the...

AI Technical Summary

Problems solved by technology

[0003] However, the existing slab continuous casting chamfering crystallizer has the phenomenon that the lower part of the chamfering surface is easy to wear during the application process, that is, after a certain amount of steel is passed, the lower part of the chamfering surface of the narrow copper plate is often adjacent to the wide copper plate. Severe wear and tear, which greatly affects the life of the chamfered copper plate

The main reason for the above phenomenon is that the billet shell grows faster near the wide-faced copper plate on the chamfered surface, so when it reaches the lower part of the crystallizer, the billet shell here has a large thickness and high strength, so it will chamfer the chamfered surface Copper plate causes relatively large wear and tear

[0004] The Chinese patent application number 201110232530.5 discloses a chamfered copper plate design with a funnel-shaped curved surface. According to the patent, a multi-taper design is adopted in the length direction of the crystallizer to ensure uniform cooling of the billet shell at the chamfered surface However, in the length direction of the crystallizer, since the blank shell needs to be pressed from the arc shape to a flat surface, the friction between the chamfered copper plate and the blank shell will inevitably increase, thereby increasing the wear on the chamfered copper plate and reducing the Service life of chamfered copper plate

Images