A method of producing a backup roll steel

By employing a method of two-stage vacuum casting and alloy composition adjustment, the problems of high production cost and core defects in Cr4 and Cr5 series support roll steel ingots were solved, achieving cost reduction and performance improvement.

CN119609095BActive Publication Date: 2026-06-19TIANJIN HEAVY EQUIP ENG RES +1
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN HEAVY EQUIP ENG RES
Filing Date
2023-09-13
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The existing Cr4 and Cr5 series support roll steel ingots have high production costs and serious problems such as core shrinkage and porosity.

Method used

The method of two-stage vacuum casting is adopted. By smelting, deoxidizing, desulfurizing and refining the raw materials of the support roll steel ingot and adjusting the alloy composition, two parts of support roll molten steel are obtained separately and cast under vacuum conditions. Argon gas and heat preservation agent are used to control the temperature of molten steel and solidification process, reduce the riser ratio and increase the ingot body ratio.

Benefits of technology

It reduces the production cost of support roll steel, improves the shrinkage cavity and porosity in the core, ensures the strength and toughness of the support roll, and improves its fracture resistance.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119609095B_ABST
    Figure CN119609095B_ABST
Patent Text Reader

Abstract

This invention relates to a method for producing support roll steel, belonging to the field of metallurgical industry, and solves the problems of high cost and severe shrinkage porosity in existing support roll steel. The method for producing support roll steel includes: smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a first portion of support roll steel molten steel, tapping the steel, vacuum casting, and solidifying to obtain a solidified billet shell and liquid steel inside the billet shell; smelting, deoxidizing, desulfurizing, and refining the support roll steel ingot raw material, adjusting the alloy composition to obtain a second portion of support roll steel molten steel, tapping the steel, mixing the second portion of support roll steel molten steel with the liquid steel inside the billet shell within the solidified billet shell of the first portion of support roll steel, vacuum casting, solidifying to obtain a complete support roll steel ingot, demolding, removing the sprue, forging, removing the riser, heat treating, and machining to obtain the support roll steel; the composition of the first portion of support roll steel and the second portion of support roll steel molten steel differs.
Need to check novelty before this filing date? Find Prior Art