Cavity oxidation preventing method for centrifugal composite roller

Abstract

The invention relates to a cavity oxidation preventing method for a centrifugal composite roller and belongs to the technical field of roller cavity oxidation prevention. According to the cavity oxidation preventing method for the centrifugal composite roller, in the solidification forming process of a working layer of an outer layer of the centrifugal composite roller under the horizontal type centrifugal effect, casting powder with a softening point of 800 DEG C-1200 DEG C is added in a cavity of the centrifugal composite roller constantly, and by adjusting the centrifugal rotating speed, the casting powder covers the inner surface of the roller cavity uniformly; and before a core portion structure is poured in the cavity of the centrifugal composite roller, the casting powder in the cavity is poured out. According to the method, the oxidation preventing effect of the cavity of the centrifugal composite roller is improved, the combination defect of the working layer of the centrifugal composite roller and the core portion structure is avoided, accidents are prevented from occurring in the rolling process of the centrifugal composite roller, the use requirement of high-strength work of the centrifugal composite roller is met, tolerance of the centrifugal composite roller is enhanced, then the production cost is reduced, and the method is simple, feasible and capable of being widely used.

Description

technical field [0001] The invention relates to a cavity anti-oxidation method of a centrifugal compound roll, belonging to the technical field of anti-oxidation of a roll cavity. Background technique [0002] The roll is an important part of the rolling mill in the rolling mill. It uses the pressure generated by a pair or a group of rolls to roll the steel. It is subjected to strong rolling force, severe wear and high temperature conditions during work, which affects the performance of the roll. There are higher requirements. [0003] The current centrifugal composite roll is composed of two different materials of the outer working layer and the inner core structure combined at high temperature. The inner cavity formed by the outer working layer of the centrifugal composite roll is called the cavity, and the composite rough rolling high The alloy content of the working layer is high, and the inner surface of the cavity has a serious tendency to oxidize. Once the cavity is ...

AI Technical Summary

Problems solved by technology

[0003] The current centrifugal composite roll is composed of two different materials of the outer working layer and the inner core structure combined at high temperature. The inner cavity formed by the outer working layer of the centrifugal composite roll is called the cavity, and the composite rough rolling high The alloy content of the working layer is high, and the inner surface of the cavity has a serious tendency to oxidize. Once the cavity is oxidized, it will directly lead to bonding defects between the working layer and the core structure. Rollers with bonding defects will have a higher risk of accidents during the rolling process. Unable to meet the requirements for rolling use, resulting in unqualified rolled products, resulting in a large loss of manufacturing costs. In the traditional anti-oxidation measures for the cavity, the quality of the mold slag added is poor, and the addition of the mold slag is inappropriate, which often leads to centrifugation. Combination Defects of Working Layer and Core Structure of Composite Roll