Edging roll mould and process for producing edging roll by adopting edging roll mould

Abstract

The invention discloses an edging roll mould and a process for producing an edging roll by adopting the edging roll mould. The edging roll mould comprises a bottom box, a cold type, an upper roll neck sand box and a casting head sand box which are sequentially arranged from bottom to top, wherein the upper end of the bottom box is opened, and the lower end of the bottom box is sealed; the cold type, the upper roll neck sand box and the upper and lower ends of casting head sand box are opened, and an inner cavity of the bottom box is corresponding to a tenuous shaft neck end of the edging roll. According to the edging roll mould provided by the invention, the tenuous shaft neck part of the edging roll can be designed on the lower part of the mould, 10% of molten steel is saved, the tenuous shaft neck part can obtain fine grained structure, a loosen and coarseness phenomenon is eliminated, the yield is improved, and the manufacturing cost is saved; meanwhile, the scrap rate of the tenuous shaft neck part is reduced, the efficiency is improved, and the energy saving and environmental protection are realized.

Description

technical field [0001] The invention relates to a mold for edge roll and a process for producing edge roll by using the mold. Background technique [0002] The 1250mm-2300mm hot strip continuous rolling mill is used for correcting forming and controlling the width and narrowness of the frame and the edge rolling roll used for the H-shaped steel leg-controlled wide-height control frame. Due to the special shape of the roll, the diameter of the roll body is large, and the roll neck is slender. , the slender part of the roll neck is designed to be produced on the upper part of the mold. Due to the large process design coefficient (70-80% of the roll diameter φ) and the high water shrinkage of high-temperature steel, the rough and loose structure of the slender part of the roll neck often leads to scrapping and loss very big. [0003] Edge rolls need to have extremely high strength, wear resistance and thermal crack resistance in order to prolong the service life and achieve th...

AI Technical Summary

Problems solved by technology

[0004] Because the edge rolls are used at the front and rear of the roughing mill and operate at a high temperature of more than 1,000 degrees for a long time, the material of the edge rolls used by the manufacturer is forged steel-SGV-AD140I / 160I semi-steel, due to changes in steel quality , the edge rolling rolls of the above materials can no longer meet the production needs, and there are different degrees of defects in use: the edge rolling rolls made of forged steel have low carbon (C) content, poor wear resistance and thermal cracking resistance, and are prone to cracking. Cracks, low rolling volume, high cost; medium nickel chromium molybdenum nodular (SGV) material edge rolling rolls have enhanced wear resistance and poor strength (≧320MPa), which may easily cause roll neck breakage accidents during operation; AD140I / 160I material rolling rolls Side rolls, the rolling capacity often hovers around 30,000-40,000 tons

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