Preparation method of composite cold roll and outer layer material

By using specific chemical components and processes to prepare composite cold rolls, the problems of existing materials in hardness retention ability and tissue uniformity are solved, and higher wear resistance and toughness are achieved, and the production efficiency of rolling steel and material service life are improved.

CN120384243APending Publication Date: 2025-07-29SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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Patent Information

Application Number
CN202510233457.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-07-29

AI Technical Summary

Technical Problem

The existing composite cold roll outer layer materials have poor results in improving the hardness retention ability, wear resistance and tissue uniformity of the working layer, making it difficult to meet the needs of modern cold rolling mills for high efficiency and high precision.

Method used

The composite cold rolling roll is prepared through arc furnace and LF refining furnace smelting, vacuum degassing, electroslag remelting, fine crystal treatment and forging, etc., to form a bimetal composite structure to improve the structural uniformity and wear resistance of the material.

Benefits of technology

It improves the hardness retention and structural uniformity of the composite cold rolling roll, enhances the wear resistance and toughness of the working layer, improves the production efficiency of steel rolling, and reduces the consumption of outer layer materials.

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Abstract

The invention discloses a preparation method and an outer-layer material of a composite cold roll, and belongs to the technical field of rolls, and the preparation method comprises the following steps: S1, preparing steel raw materials according to chemical components and weight percentage contents in the outer-layer material of the composite cold roll, and preparing an outer-layer steel ingot according to a smelting procedure production process; s2, the outer-layer steel ingot is manufactured into an outer-layer roller blank according to the forging procedure production technology, and a mandrel roller blank is manufactured according to the mandrel steel ingot according to the forging procedure production technology; s3, the outer-layer roller blank and the mandrel roller blank of the composite cold roller are combined, and a composite cold roller blank is obtained; and S4, the roller blank is machined, and the composite cold roller is obtained. The composite cold roll has good hardness retentivity, structure uniformity and manufacturability, meanwhile, the abrasion resistance, obdurability and structure uniformity of the working layer of the composite cold roll are improved, the comprehensive use effect of the composite cold roll in the whole service period is improved, the steel rolling production efficiency is improved, and the production cost is reduced. And the consumption of the outer layer of the composite cold roll is reduced.
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