Manufacturing process for bi-metal composite roll collars

Abstract

The invention discloses a manufacturing process for bi-metal composite roll collars and relates to the technical field of steel rolling industry. The manufacturing process comprises the following steps of manufacturing a centrifugal mold, arranging end covers at two ends of the centrifugal mold, brushing a coating on the centrifugal mold, covering a film on the centrifugal mold, baking at high temperature, and rotating on a centrifugal machine for casting preparation; smelting semisteel, spheroidizing a nodular cast iron material in a core, centrifugally casting a working layer material, covering a small amount of broken glass to prevent the working layer material form being oxidized, continuously rotating the centrifugal mold, ensuring that the working layer material is continuously cured, casting an inner layer material after a certain period of time, and completing the casting process in two times. In the manufacturing process, chemical compositions of a roll body are determined, a casting temperature, a cooling parameter, and parameters in an annealing process, a quenching process and a tempering process for heat treatment are controlled in certain ranges, large roll collars with reliable quality can be produced and are popular with domestic and foreign markets.

Description

Technical field [0001] The invention relates to a manufacturing process of a bimetal composite roll ring, which belongs to the technical field of the steel rolling industry. Background technique [0002] Many tools and equipment are used in steel rolling production. The roll ring is a special tool in the steel rolling industry. Its function is the same as that of a roll. It is to deform the metal to the required size and shape. The main uses of the roll ring are as follows: [0003] 1. The finishing rolling part of the wire rod mill is used as the last ten high-speed wire rod rolling mills (the standard configuration of high-speed wire rod mills in my country and around the world is 28 rolling mills, and the last ten of these 28 rolling mills) rolling mills have completed high speed and precision. Rolling tools that work under the requirements of size and long-term stable size; currently this type of roll ring is mainly made of hard alloy materials, commonly known as tungsten carb...

AI Technical Summary

Problems solved by technology

The cost of imported roller rings is too high, which greatly increases the cost of the enterprise. Therefore, there is an urgent need to develop a low-cost method that can manufacture large-scale roller rings in large quantities.

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