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Casting method for sink roll shaft sleeve

A technology of sinking rollers and bushings, which is applied in the field of metallurgical equipment manufacturing, can solve the problems of unsatisfactory performance, lower production efficiency, and high price, and achieve the effects of improved mechanical properties, increased strength, and strong thermal feeding capacity

Inactive Publication Date: 2016-11-23
江苏优泽科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bushing materials used in hot-dip galvanizing units at home and abroad are usually cobalt-based alloys, etc. Although they have excellent properties such as wear resistance, corrosion resistance, high temperature resistance, and high hardness, they are used as sunk roller bushings and have the best effect; but It is expensive and difficult to promote. If you use a general alloy, although the price is low, its performance cannot meet the requirements, and it needs to be replaced frequently, which reduces production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention discloses a casting method of a submerged roller sleeve, which comprises drying and preheating, raw material smelting, casting parameters setting, casting and furnace release; the casting is centrifugal casting with pressure change.

[0023] Specific steps are as follows:

[0024] (1) Remove the paint and oxide layer that may be contained on the surface of the required smelting tool, clean it, dry it and preheat it, apply a layer of protective paint, and dry it again for use;

[0025] (2) Take molybdenum-based alloy as needed, add it to an induction melting furnace, heat up to 1550°C for melting, add additives after it is completely melted, and obtain a molybdenum-based alloy liquid after stirring evenly; the composition of the molybdenum-based alloy and each The mass percentages of the components are: molybdenum: 7.2%, titanium: 5.7%, zirconium: 4.4%, hafnium: 2.2%, niobium: 2.5%, silicon: 2.1%, carbon: 3.0%, phosphorus: 0.01%, sulfur: 0.01%, the rest is...

Embodiment 2

[0030] The invention discloses a casting method of a submerged roller sleeve, which comprises drying and preheating, raw material smelting, casting parameters setting, casting and furnace release; the casting is centrifugal casting with pressure change.

[0031] Specific steps are as follows:

[0032] (1) Remove the paint and oxide layer that may be contained on the surface of the required smelting tool, clean it, dry it and preheat it, apply a layer of protective paint, and dry it again for use;

[0033] (2) Take molybdenum-based alloy as needed, add it to an induction melting furnace, heat up to 1650°C for melting, add additives after it is completely melted, and obtain a molybdenum-based alloy liquid after stirring evenly; the composition of the molybdenum-based alloy and each The mass percentages of the components are: molybdenum: 10.5%, titanium: 3.3%, zirconium: 2.9%, hafnium: 0.8%, niobium: 1.7%, silicon: 1.2%, carbon: 1.4%, phosphorus: 0.01%, sulfur: 0.01%, the rest i...

Embodiment 3

[0038] The invention discloses a casting method of a submerged roller sleeve, which comprises drying and preheating, raw material smelting, casting parameters setting, casting and furnace release; the casting is centrifugal casting with pressure change.

[0039] Specific steps are as follows:

[0040] (1) Remove the paint and oxide layer that may be contained on the surface of the required smelting tool, clean it, dry it and preheat it, apply a layer of protective paint, and dry it again for use;

[0041] (2) Take molybdenum-based alloy as needed, add it to an induction melting furnace, heat up to 1600°C for melting, add additives after it is completely melted, and obtain a molybdenum-based alloy liquid after stirring evenly; the composition of the molybdenum-based alloy and each The mass percentages of the components are: molybdenum: 9.3%, titanium: 4.2%, zirconium: 3.5%, hafnium: 1.4%, niobium: 2.1%, silicon: 1.7%, carbon: 2.1%, phosphorus: 0.005%, sulfur: 0.005%, the rest is...

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PUM

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Abstract

The invention provides a casting method for a sink roll shaft sleeve. The casting method includes the steps of drying and preheating, raw material smelting, casting parameter setting, casting, and discharging from a furnace. Variable-pressure centrifugal casting is adopted. According to the casting method, the sink roll shaft sleeve is manufactured from creative raw material ingredients through the method combining non-equal-pressure casting and centrifugal casting, so that the microstructure of the sink roll shaft sleeve is made more compact, the dynamic properties, such as strength, of the sink roll shaft sleeve are effectively improved, the sink roll shaft sleeve is durable, and long-time stable operation of a sink roll is guaranteed.

Description

technical field [0001] The invention belongs to the field of manufacturing methods of metallurgical equipment, and in particular relates to a casting method of a sunken roller sleeve. Background technique [0002] During the production of continuous hot-dip galvanizing, the steel strip changes its direction through the sinking roll immersed in the zinc liquid, that is, it changes from entering the zinc pot for galvanizing to exiting the zinc 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 sinking roller bushes on both sides, and the sinking roller bushing acts as a sliding bearing. At present, the bushing materials used in hot-dip galvanizing units at home and abroad are usually cobalt-based alloys, etc. Although they have excellent properties such as wear resistance, corrosion resistance, high temperature resistance, and high hardness, they are used as sunk rol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/04B22D13/10C22C38/12C22C38/14C22C38/02C22C37/10
CPCB22D13/04B22D13/101C22C37/10C22C38/002C22C38/02C22C38/12C22C38/14
Inventor 马中亮于兴仁蒋斌
Owner 江苏优泽科技有限公司
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