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

A high-temperature alloy and heating furnace technology, which is applied in the field of high-temperature alloy materials, can solve the problems that the service life cannot be effectively guaranteed, wear, and affect the service life, so as to improve high-temperature oxidation resistance and high-temperature build-up resistance, and good tissue stability Performance and high temperature compression creep resistance, anti-corrosion or wear effect

Inactive Publication Date: 2017-10-20
中冶京诚(扬州)冶金科技产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Effect test

Embodiment 1

[0023] A kind of heat-resistant pad for steel rolling heating furnace, according to the chemical composition of the superalloy used in the heat-resistant pad designed by the present invention, it includes the following components in weight percentage: C 0.05%, Si 0.5%, Mn 0.5%, Cr 26%, Ni 13%, W 1.5%, Mo 1%, Nb 0.5%, Ce 0.02%, Zr 0.02%, Fe 0.01%, the rest is Co and unavoidable impurities. The alloy material with the above ratio is melted in a vacuum induction furnace, wherein Zr and Ce are added during the second alloying treatment, then poured into an ingot mold, and cooled to obtain a master alloy ingot. Then the master alloy ingot was put into a vacuum induction furnace for rapid remelting, poured into the mold shell, and finally the vacuum was broken to take out the mold to obtain the 1# test piece.

Embodiment 2

[0025] A kind of heat-resistant spacer for steel rolling heating furnace, according to the chemical composition of the superalloy used in the heat-resistant spacer designed by the present invention, it includes the following components in weight percentage: C 0.12%, Si 0.9%, Mn 0.6%, Cr 28.5%, Ni 14.5%, W 1.9%, Mo 1.3%, Nb 0.8%, Ce 0.08%, Zr 0.06%, Fe 4%, the rest is Co and unavoidable impurities. The alloy material with the above ratio is melted in a vacuum induction furnace, wherein Zr and Ce are added during the second alloying treatment, then poured into an ingot mold, and cooled to obtain a master alloy ingot. Then the master alloy ingot was put into a vacuum induction furnace for rapid remelting, poured into the mold shell, and finally the vacuum was broken to take out the mold to obtain the 2# test piece.

Embodiment 3

[0027]A kind of heat-resistant spacer for steel rolling heating furnace, according to the chemical composition of the superalloy for heat-resistant spacer designed in the present invention, it comprises following composition by weight percentage: C 0.16%, Si 1.2%, Mn 0.9%, Cr 29.5%, Ni 15%, W 2.4%, Mo 1.5%, Nb 1.1%, Ce 0.12%, Zr 0.04%, Fe 2%, the rest is Co and unavoidable impurities. The alloy material with the above ratio is melted in a vacuum induction furnace, wherein Zr and Ce are added during the second alloying treatment, then poured into an ingot mold, and cooled to obtain a master alloy ingot. Then the master alloy ingot was put into a vacuum induction furnace for rapid remelting, poured into the mold shell, and finally the vacuum was broken to take out the mold to obtain the 3# test piece.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/07C21D9/70
CPCC22C19/07C21D9/70
Inventor 侯煜董杰蒋乃富周劲松江华
Owner 中冶京诚(扬州)冶金科技产业有限公司
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