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Sink roller shaft sleeve

A technology of sunken roller and bushing, applied in coating, furnace type, hot-dip plating process, etc., can solve the problems of difficulty in popularization and use, high cost of cobalt-based alloys, etc. Liquid corrosion ability, the effect of improving mechanical properties

Inactive Publication Date: 2018-01-26
王茂庭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bushing materials currently used in hot-dip galvanizing units at home and abroad include cobalt-based alloy Stellite 6B, etc. Among them, cobalt-based alloys have excellent properties such as wear resistance, corrosion resistance, high temperature resistance, and high hardness. They are used as sinker roller bushings, and the use effect Best, but cobalt-based alloys are expensive and difficult to promote and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The material of the sinking roller sleeve is melted in a 500 kg medium frequency induction furnace, and the sinking roller is composed of the following components:

[0023] C 0.24%%, Mn 0.60%%, Si 0.80%%, Zr 0.02%, Al 0.035%, Cr2.7%, Ni 0.75%, Y0.02, Mo 0.5%, Nb 0.03%, B 2.5%, N 0.003 , P <0.035, S <0.045, and the rest is Fe; the smelting steps are as follows:

[0024] (1) Use an electric furnace to smelt scrap steel, heat and melt common scrap steel, recarburizer, and mixture, add Ni after the molten steel is melted, and continue to heat up to 1630°C to make the Ni content 0.75%;

[0025] (2) When the content of C is 0.24%-0.45%, tap steel to the ladle;

[0026] (3), during the tapping process of the molten steel in step (2), add a desulfurizer to the ladle for desulfurization, the desulfurizer is calcium fluoride, so that the S in the molten steel is <0.045;

[0027] (4) Add Mn, Si, Zr, Al, Cr, Y, N to the molten steel to control the content of each element in the m...

Embodiment 2

[0034] The material of the sinking roller sleeve is melted in a 500 kg medium frequency induction furnace, and the sinking roller is composed of the following components:

[0035] C 0.32%, Mn 1.2%, Si 0.90%, Zr 0.060%, Al 0.055%, Cr2.9%, Ni 0.95%, Y0.025%, Mo 1.4%, Nb 0.045%, B 2.9%, N 0.006, P <0.025, S <0.025, and the rest is Fe; the sinking roller sleeve is made by the following steps:

[0036] (1) Use an electric furnace to smelt scrap steel, heat and melt common scrap steel, recarburizer, and mixture, add Ni after the molten steel is melted, and continue to heat up to 1640°C to make the Ni content 0.95%;

[0037] (2) When the content of C is between 0.32% and 0.45%, tap steel to the ladle;

[0038] (3), during the tapping process of molten steel in step (2), add desulfurizer lime to the ladle for desulfurization, so that S in the molten steel is <0.025;

[0039] (4) Add Mn, Si, Zr, Al, Cr, Y, N to the molten steel to control the content of each element in the molten ste...

Embodiment 3

[0046] The material of the sinking roller sleeve is melted in a 500 kg medium frequency induction furnace, and the sinking roller is composed of the following components:

[0047]C 0.45%, Mn 2.0%, Si 1.10%, Zr 0.12%, Al 0.080%, Cr3.5%, Ni 1.60%, Y0.03%, Mo 2.5%, Nb 0.55%, B 3.3%, N 0.01, P <0.035, S <0.045, and the rest is Fe; the sinking roller sleeve is made through the following steps:

[0048] (1) Use an electric furnace to smelt scrap steel, heat and melt common scrap steel, recarburizer, and mixture, add Ni after the molten steel is melted, and continue to heat up to 1650°C to make the Ni content 1.60%;

[0049] (2) When the content of C is between 0.40% and 0.45%, tap the steel to the ladle;

[0050] (3), during the tapping process of molten steel in step (2), add a desulfurizing agent magnesium oxide powder to the ladle for desulfurization, so that S in the molten steel is <0.045;

[0051] (4) Add Mn, Si, Zr, Al, Cr, Y, N to the molten steel to control the content of...

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PUM

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Abstract

The invention discloses a sink roller shaft sleeve. The sink roller shaft sleeve comprises 0.24-0.45% of C, 0.60-2.0% of Mn, 0.80-1.10% of Si, 0.02-0.12% of Zr, 0.035-0.080% of Al, 2.7-3.5% of Cr, 0.75-1.60% of Ni, 0.02-0.03% of Y, 0.5-2.5% of Mo, 0.03-0.55% of Nb, 2.5-3.3% of B, 0.003-0.01% of N, less than 0.035% of P, less than 0.045% of S, and the balance Fe. On the basis of arranging the sinkroller shaft sleeve on low-carbon high-speed steel in a sleeving mode, the boron element is added, and under the premise that the high-speed steel has excellent high-temperature red hardness, the sinkroller shaft sleeve has excellent zinc liquid corrosion resistance; and in addition, the appropriate amount of yttrium, magnesium, calcium, titanium, niobium and potassium are added, the functions ofdeoxidation, desulfurization, texture refining and morphology and distribution of inclusions improving are mainly achieved, the mechanical property of the sink roller shaft sleeve is advantageously improved, and especially the properties of strength and toughness of the sink roller shaft sleeve are improved.

Description

technical field [0001] The invention relates to a sinking roller, in particular to a sinking roller sleeve with strong abrasion resistance and high strength. Background technique [0002] During the production of continuous hot-dip galvanizing, the steel strip changes direction by sinking rolls immersed in zinc liquid (temperature 460~480°C), that is, from entering the galvanizing pot to exiting the galvanizing pot, and the galvanized layer is solidified and cooled. The sinking roller that rotates with the movement of the steel belt is supported on the fixed frame by the bushes on both sides, and the bushes act as sliding bearings. The bushing materials currently used in hot-dip galvanizing units at home and abroad include cobalt-based alloy Stellite 6B, etc. Among them, cobalt-based alloys have excellent properties such as wear resistance, corrosion resistance, high temperature resistance, and high hardness. They are used as sinker roller bushings, and the use effect Prefe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/58C22C38/50C22C38/06C22C38/44C22C38/48C22C38/54C22C33/04C21D1/30C21D9/40C23C2/06
CPCY02P10/20
Inventor 王茂庭
Owner 王茂庭
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