Support roll with high abrasion resistant performance and manufacturing method thereof

Abstract

The invention discloses a support roll with a high abrasion resistant performance, which comprises the following chemical constituents by weight percent: 0.38 to 0.85 percent of C, 6.1 to 10.0 percent of Cr, 0.4 to 1.5 percent of Mo, 0.15 to 0.8 percent of V, as well as one or more of 0.35 to 1.20 percent of Si, 0.35 to 1.00 percent of Mn, 0.4 to 0.8 percent of Ni, 0.4 to 0.8 percent of Co, and Fe and unavoidable impurities in balancing amount. The invention further discloses a manufacturing method of the support roll; and the rigidity and the abrasion resistance of the support roll produced according to the manufacturing method are greatly improved.

Description

technical field [0001] The invention relates to the field of metallurgical roll manufacturing, in particular to a backup roll and a manufacturing method thereof. Background technique [0002] Large-scale strip mills are the key process equipment of modern metallurgical enterprises, and the back-up rolls are the key core components in the rolling mills, which are used to support the work rolls or intermediate rolls, enhance their rigidity, and prevent excessive deflection deformation of the work rolls during rolling. affect the shape quality. The performance of the backup roll directly determines the stability of the rolling mill, the smooth running of the production line, production consumption and product quality. [0003] At present, the high-grade backup rolls of the cold and hot rolling production lines of major steel mills mainly use 5% Cr forged steel series, the C content is between 0.4-0.6wt.%, the Cr content is 2.0-5.0wt.%. A small amount of alloying elements such...

AI Technical Summary

Problems solved by technology

5% Cr forged steel backup rolls can meet the production needs of ordinary plates, but when producing high-value-added plates such as hot-rolled high-strength steel, high-strength automobile plates, high-grade non-oriented silicon steel, and oriented silicon steel, the lack of wear resistance is exposed The problem is that the roll surface has a concave or convex wear profile, which affects the contact state with the work roll (or intermediate roll), thereby affecting the surface quality and product qualification rate of the plate

Therefore, higher requirements are put forward for the performance of the matching backup rolls. Under the above background, the 5% Cr series forged steel backup rolls can no longer meet the higher requirements of low roll consumption and long rolling cycle.

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