High-speed steel roll ring and its production

Abstract

A high-speed steel roller ring for rolling wire or rod material contains C, W, Mo, V, Cr, Al, Ni, Co, Nb, Ti, Ce, Na, Mg, Si, Mn, S, P and Fe proportionally. It is prepared through smelting in electric furnace, centrifugal casting, and annealing, high-temp quenching and tempering twice. Its advantages are high hardness, tension strength and toughness for breaking, smooth surface and high size stability.

Description

1. Technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a roll ring for various wire rod mills and bar mills and a manufacturing method thereof, in particular to a high-speed steel roll ring and a manufacturing method thereof. 2. Background technology [0002] Hot rolling is an important process in the iron and steel industry. Hot rolling rolls are the key tools for hot rolling production and must be able to withstand quite strong force and heat. In addition to good fracture resistance, the surface should also have good wear resistance and heat resistance. This is not only because the roll is closely related to the cost of the product, but also directly determines the quality of the hot-rolled product and the operating rate of the hot-rolling mill. Due to the rolling stoppage caused by the surface wear of the roll, it often causes great economic losses. Therefore, the research on improving the wear resistance of the hot roll su...

AI Technical Summary

Problems solved by technology

At present, the roll rings of wire mills and bar mills mainly use alloy cast iron roll rings and hard alloy roll rings. Alloy cast iron roll rings have high strength and good toughness, but low hardness, poor red hardness and low wear resistance.

Tungsten carbide roller rings have the advantages of high hardness and good wear resistance, but are brittle and prone to peeling and brittle cracks during use

Chinese patent document CN1174764 provides a cermet roll ring with good wear resistance, but this roll ring must be formed by hot pressing and sintering, the production process is complicated, and adding non-metallic ceramics to the roll ring will damage the roll ring. Toughness, resulting in brittle cracks in the roll ring during use