Novel composite hot roller and manufacturing method thereof

Abstract

The invention relates to a novel composite hot roller and a manufacturing method thereof, and belongs to the field of hot roller production and manufacture. The hot roller comprises a hot roller body, wherein the hot roller body comprises a roller body and a roller head; an annular groove is formed in the periphery of the roller body; a transition layer is arranged at the bottom of the annular groove; and a working layer is arranged on the transition layer. According to stress distribution characteristics of the hot roller, different welding materials are used, and ingredients and structures of different parts on the surface of the hot roller are changed, so that rolling pressure and thermal stress borne by the hot roller during working are dispersed, and a purpose of improving the performance of the hot roller is achieved. Compared with a corresponding hot roller manufactured with a conventional method, the service life of the hot roller can be prolonged, the processing benefit is increased, the maintenance of the hot roller and a rolling mill is decreased, the manufacturing cost of steel is reduced, and a good economic benefit is realized.

Description

technical field [0001] The invention relates to a novel composite hot rolling roll and a manufacturing method thereof, belonging to the field of hot rolling roll manufacturing. Background technique [0002] In the production of hot rolled steel, the hot roll on the rolling mill is one of the important consumable parts that determine the efficiency of the rolling mill and the quality of the rolled product. The quality of the hot roll directly affects the appearance quality of the steel, and the hot roll works under the high temperature and force Under the action of the hot roll, its surface is repeatedly rubbed, which will cause strong wear. Therefore, steel mills have very high requirements for the quality of hot rolls. And it does not hesitate to use the overall high-speed steel or hard alloy roll, which not only greatly increases the production cost, but also causes waste of the core material of the roll. Therefore, the improvement and innovation of the hot roll is an impo...

AI Technical Summary

Problems solved by technology

Although this method has a certain effect; but because the hot roll will produce residual stress and thermal stress in the preparation process before manufacturing and use, it is further subjected to various cyclic stresses during use, including bending, torsion, shearing , contact stress and thermal stress, etc., and the distribution of these stresses along the roll body is uneven and constantly changing. The reason for this is not only design factors, but also the reasons for the continuous change of roll wear, temperature and roll shape during use. , in addition, there are often abnormalities in rolling conditions, and at the same time, the rolls are not properly cooled after use, and they are also damaged by thermal stress

In addition to wear and tear, the rolls often have various local damages and surface damages such as cracks, fractures, peeling, and indentations. The above reasons not only lead to a shorter service life of hot rolls, but also directly affect the benefits and processing quality of steel rolling.

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