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Heat-resistant steel material for water cooled rolls of normalizing furnace

A technology of heat-resistant steel and water-cooled rolls, applied in the field of heat-resistant steel materials, can solve the problems of diffusion, affecting the quality of steel plates, and failure to produce adhesion layers, etc., achieve high red hardness, and solve the effects of nodules

Active Publication Date: 2012-11-14
无锡晶瑜智能机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nodules will become thicker and thicker over time, causing pits and pits to form on the surface when the steel plate passes through the nodulated rollers, seriously affecting the quality of the steel plate
At present, the roller surface has been covered with a ceramic layer (zirconia, alumina) to separate the oxidized particles on the surface of the steel plate from the roller surface, so that it cannot spread to the roller surface and cannot produce a firm adhesion layer.
After using this method, the surface quality of the steel plate has been significantly improved, and the indentation and pitting basically no longer appear, but the service life of the covering ceramic layer is very short, generally only a few months

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare the heat-resistant steel material according to the following parts by weight:

[0025] C 0.33 Cr 24

[0026] Ni 31 Al 3.3

[0027] Si 0.5 Y 0.02

[0028] Mn≤1.2;

[0029] The balance is Fe and unavoidable impurities P and S.

[0030] Among them, impurities S≤0.01, P≤0.02.

[0031] After five months of use, no or little nodulation occurred.

Embodiment 2

[0033] Prepare the heat-resistant steel material according to the following parts by weight:

[0034] C 0.35 Cr 25

[0035] Ni 33 Al 3.5

[0036] Si 0.6 Y 0.03

[0037] Mn≤1.2;

[0038] The balance is Fe and unavoidable impurities P and S.

[0039] Among them, impurity S≤0.02, P≤0.01.

[0040] After five months of use, no or little nodulation occurred.

Embodiment 3

[0042] C 0.38 Cr 26

[0043] Ni 32.5 Al 3.87

[0044] Si 0.8 Y 0.04

[0045] Mn≤1.2;

[0046] The balance is Fe and unavoidable impurities P and S.

[0047] The impurities are S≤0.02, P≤0.02.

[0048] After five months of use, no or little nodulation occurred.

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PUM

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Abstract

The invention relates to a heat-resistant steel material for water cooled rolls of a normalizing furnace, which belongs to the technical field of heat-resistant steel materials. The heat-resistant steel material for the water cooled rolls of the normalizing furnace is named as ZG3Cr25Ni31Al3.5Y. S and P are controlled when the heat-resistant steel material is smelted, and simultaneously aluminum is added to make up the disadvantage of wide and large crystal boundary during overfiring so as to generate aluminum micro-particles which are embedded on the crystal boundary and have ultrahigh read hardness, wherein the micro-particles are difficult to be combined with oxidized micro metal oxides of steel plates and have similar mechanism action with a ceramic layer (aluminum oxide), so the problem of salamander can be solved thoroughly.

Description

technical field [0001] The invention relates to a heat-resistant steel material used for a water-cooled roll of a normalizing furnace, and belongs to the technical field of heat-resistant steel materials. Background technique [0002] Normalizing furnace water-cooled rolls are mainly used in heat treatment furnaces for stainless steel medium and thick plates. The furnace rollers are made of high-nickel and chromium heat-resistant steel materials, and are kept at high temperature (above 1200°C) for a long time to transport medium-thick stainless steel plates. Due to the harsh working conditions, the thermal strength requirements are high. The roll body is easy to form nodules and other defects, resulting in failure of the roll. Therefore, the furnace roller usually needs to be replaced after 3 to 6 months to remove nodules. Especially the nodulation of the furnace rolls in the high-temperature section is particularly prominent, and only new rolls can only be replaced in se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/40
Inventor 赵军
Owner 无锡晶瑜智能机械有限公司
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