High-temperature alloy for heat-resisting cushion block and heat-resisting cushion block for steel rolling heating furnace

Abstract

The invention discloses a high-temperature alloy for a heat-resisting cushion block and the heat-resisting cushion block for a steel rolling heating furnace in the field of high-temperature alloy materials. The high-temperature alloy comprises, by weight percent, 0.05%-0.30% of C, 0.5%-1.5% of Si, 0.5%-1.5% of Mn, 26%-31% of Cr, 13%-18% of Ni, 1.5%-3.5% of W, 1%-2% of Mo, 0.5%-1.5% of Nb, 0.02%-0.2% of Ce, 0.02%-0.1% of Zr, 0.01%-10% of Fe and the balance Co and inevitable impurities. The heat-resisting cushion block made from the high-temperature alloy can be used at the steel rolling heating furnace temperature ranging from 1,300 DEG C to 1,350 DEG C and is arranged on an evaporation cooling water cooling beam to support a steel billet; good high-temperature compression creep resistance and high-temperature oxidation resistance are achieved; the problems of corrosion, wear and accumulated bumps can be avoided; and the service life of the heat-resisting cushion block can be prolonged.

Description

technical field [0001] The invention belongs to the field of high-temperature alloy materials, and in particular relates to a high-temperature alloy used for manufacturing a heat-resistant cushion block and a heat-resistant cushion block for a steel rolling heating furnace made of the alloy. Background technique [0002] The steel billet must be heated by a continuous steel rolling heating furnace before rolling, so that the steel billet undergoes three processes of preheating, heating, and soaking (isothermal) in sequence, and the steel billet is heated to a specific process temperature, and the internal and external temperatures of the steel billet are required to be consistent . The continuous steel rolling heating furnace includes a walking heating furnace and a pushing steel heating furnace. The continuous steel rolling heating furnace is equipped with water-cooled beams. During the heating process of the billet, heat-resistant pads are arranged on the water-cooled beam...

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Problems solved by technology

[0004] With the further research on cobalt alloy materials, material workers have found that cobalt alloys still have some shortcomings at high temperatures: when UMCo-50 is used for a long time at 600-900°C, harmful σ phases will be precipitated, and at temperatures above 1000°C When used for a long time, (Cr, Fe) 2N flake phase will be precipitated, resulting in a large loss of heat-resistant pads, prone to serious deformation, and affecting the service life

[0005] In recent years, the high-efficiency and energy-saving vaporization cooling technology has been widely used in the walking-type large slab heating furnace for steel rolling, and the operating temperature of the heat-resistant pad has also increased. The working temperature of the upper surface of the heat-resistant pad is 100% higher than that of the water-cooled beam. ℃~150℃, and generally work at 1300℃~1350℃. When UMCo-50 and KHR40CM alloys work under such harsh working conditions for a long time, they are prone to corrosion, oxidation, compression, wear and build-up problems, and the service life cannot be reached. be effectively guaranteed

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