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Annealing furnace roller surface peening coating and method for making same

A technology of surface strengthening and annealing furnace, which is applied in the direction of coating, metal material coating process, furnace, etc., can solve the problems of inability to achieve high temperature wear resistance and nodulation resistance, and decrease in bonding performance, so as to reduce the use and repair Cost, improve binding performance, good anti-oxidation effect

Inactive Publication Date: 2008-01-30
常州杰耐机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount added is large, it is beneficial to high temperature wear resistance and nodulation resistance, but it will lead to a decrease in bonding performance; if added less, the opposite is true
The existing technology of surface strengthening coating on the roller base cannot meet the technical requirements of good high temperature wear resistance and nodulation resistance, and good bonding performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Below by embodiment the present invention will be further described:

[0034] Embodiment 1-3 is the annealing furnace roller surface strengthening coating of three-layer structure, wherein the first layer (inner layer) is a bond coat, the second layer (middle layer) is a transition coating, and the third layer (outer layer) layer) is the working coating.

[0035] (1) Pretreatment of the surface of the roll base, including stress relief annealing in a furnace;

[0036] (2) Select the material for preparing the surface strengthening coating, as shown in the following table:

[0037] coating

level one

Second floor

the third floor

Example 1

Co-based alloy

Co-based alloy

+20%Al 2 o 3

+5%Cr 2 o 3

Co-based alloy

+40%Al 2 o 3

+10%Cr 2 o 3

Example 2

Co-based alloy

+8% Al 2 o 3

Co-based alloy

+16%Al 2 o 3

Co-based alloy

...

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PUM

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Abstract

The invention relates to a strengthening coating of the surface of an annealing furnace roller and a preparation method thereof. The preparation of the strengthening coating on the surface of a roller base is performed by a selected hot-spray method. The strengthening coating comprises a bonded coating, a working coating and a transition coating between the bonded coating and the working coating. The proportion of alloy and ceramic in every coating is changed according to gradient, which means that the proportion of alloy is decreased gradually from inner to outer in every coating; while the proportion of ceramic is increased gradually and at last a gradient coating is formed. The invention not only ensures the working coating to have good antioxidation, abrasion resisting and anti- nodulation performances, but also improves the binding performance of strengthening coating and the roller base and improves the cohesion binding performance of the coating inner. Under the function of the strengthening coating of the annealing furnace roller surface made by the method of the invention, the service life of the furnace roller can be prolonged and the using cost and repairing cost can be decreased.

Description

technical field [0001] The invention relates to an annealing furnace roll surface strengthening coating and a preparation method thereof, which is especially suitable for cold rolling, cold rolling galvanizing and silicon steel annealing furnace rolls, and can also be used for the surface of metal or alloy parts under other similar working conditions Reinforced coating and method for its preparation. Background technique [0002] The furnace rolls in the continuous annealing furnace on the cold-rolled, cold-rolled galvanized and silicon steel sheet production lines are used to convey the steel sheets, and the annealing furnace rollers are used in high temperature of 600-1200°C and weak oxidizing or reducing atmosphere. The fluctuation of the atmosphere in the furnace and the chemical substances left on the surface of the steel strip in the previous process lead to the existence of a small amount of oxygen. The mismatch between the speed of the steel strip and the rotation sp...

Claims

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Application Information

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IPC IPC(8): C21D9/54C21D1/26C23C4/00C23C4/12
Inventor 邓昊
Owner 常州杰耐机械有限公司
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