A New Type of Roll Quenching Water Spraying Device

Abstract

The invention discloses a novel roller quenching water-spraying device. The novel roller quenching water-spraying device comprises an inner cylinder (1) and an outer cylinder (2) which are coaxially arranged, wherein the inner cylinder (1) is used for spraying water, and the outer cylinder (2) is used for supplying water. The two ends of a cavity (3) formed between the inner cylinder (1) and the outer cylinder (2) are sealed through end covers (4) correspondingly. The cavity (3) is divided by a partition plate (5) into a sealed upper pressure water cavity (6) and a sealed lower pressure cavity (7). The upper pressure water cavity (6) and the lower pressure water cavity (7) communicate with corresponding water supply pumps through an upper water inlet pipe (8) and a lower water inlet pipe (9) which are arranged on the outer cylinder (2) correspondingly. According to the novel roller quenching water-spraying device, the two pressure water cavities of different pressures are used for conducting water-spraying quenching through water spraying holes, large-pressure sprayed water enables a roller to be cooled at a high intensity, and the temperature of the roller is rapidly lowered to below a certain value; and small-pressure sprayed water enables the roller to be slowly cooled, the internal stress is reduced, and the purpose of lowering quenching cracking risk is achieved.

Description

technical field [0001] The invention relates to the technical field of roll preparation, in particular to a novel roll quenching water spray device capable of reducing the risk of roll quenching cracking. Background technique [0002] Cold roll is a common steel rolling tool. It is a tool that will deform metal under normal temperature conditions. Therefore, half of the cold roll needs to have high strength and surface hardness. To achieve such performance, the roll material needs to be intensely quenching heat treatment. However, the cold roll material is generally Cr-Mo steel, the total amount of alloy is high, and the tendency of quenching cracking is relatively high. It is necessary to design a water spray device that meets the quenching and cooling characteristics of the material to reduce the risk of quenching cracking. Contents of the invention [0003] The object of the present invention is to solve the problems existing in the prior art, and provide a novel roll ...

AI Technical Summary

Problems solved by technology

However, the cold roll material is generally Cr-Mo steel, the total amount of alloy is high, and the tendency of quenching cracking is relatively large. It is necessary to design a water spray device that meets the quenching and cooling characteristics of the material to reduce the risk of quenching cracking.

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