Accident-resistant forged steel supporting roll

Abstract

The invention discloses an accident-resistant forged steel supporting roll, and relates to the technical field of ferrous metallurgy processes, a working layer of the supporting roll is a tempered troostite structure, and the surface hardness of the working layer is larger than or equal to 60 HSD. The method comprises the following process steps: preparing steel raw materials according to chemical components and weight percentage contents in a newly designed material, and preparing a steel ingot according to a smelting process production process; manufacturing the steel ingot into a roller blank according to a forging process production process; the whole roller enters a box type furnace to be preheated, then a roller body of the roller is put into induction quenching equipment to be subjected to induction heating, after heating is conducted till sufficient austenitizing is achieved, water spraying is conducted for rapid cooling, and finally tempering treatment is conducted; and according to the drawing requirements of a finished product, the tempered roller blank is machined, the dimensional tolerance and the form and location tolerance of all parts are guaranteed, and the accident-resistant forged steel supporting roller is obtained. The wear resistance and accident resistance of the large forged steel supporting roller are improved, the precision and rolling efficiency of rolled metal are improved, and the hot rolling line process is optimized.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to an accident-resistant forged steel backup roll. Background technique [0002] With the rapid development of the steel industry, the grades and properties of hot-rolled plates are also continuously improved, and the proportion of high-grade or high-strength plates is constantly increasing, which puts forward new requirements for the performance of rolls; on the other hand, the upgrade of modern rolling mills also Higher requirements are put forward for the performance of the rolls. The advanced ESP continuous hot rolling line realizes automatic and full continuous hot rolling of steel plates, and the production efficiency is greatly improved. Subsequently, higher requirements are put forward for the comprehensive performance of the rolls. The rolling conditions of the ESP rolling line are more severe, the rolling pressure is higher, the rolling speed is faster, a...

AI Technical Summary

Problems solved by technology

For the increasingly harsh rolling environment, conventional back-up rolls have shown some inapplicability. In the process of use, there are often abnormalities such as the roll surface falling off and uneven wear of the roll surface, which lead to the roll off the machine.

For the existing rolls produced by induction hardening, anatomy found that the subsurface had abnormal hardness, coarse tissue, and poor mechanical properties, which reduced the anti-accident ability of the rolls.

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