Roller repair layer and roller repair method

A technology for repairing layers and rolls, which is applied in the direction of keeping roll equipment in an effective state, coating, metal rolling, etc., can solve the problems that are not widely used, and the coating is easy to detach, and achieve excellent matrix bonding strength, equipment and The process is simple and the effect of preventing thermal stress mismatch

Inactive Publication Date: 2015-03-25
SHAOXING SPRAY MICRONANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of realizing the present invention, the inventor found that thermal spraying technology has not been widely use

Method used

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  • Roller repair layer and roller repair method

Examples

Experimental program
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Effect test

Example Embodiment

[0046] Example 1

[0047] In this embodiment, a scrap roll is used as the substrate, and a repair layer is prepared on the surface of the substrate. The repair layer is composed of NiAl coating, NiAl-Cr 2 O 3 Composite coating and Cr 2 O 3 Coating composition. In this embodiment, the thickness of the NiAl coating is 100 μm, and the NiAl-Cr 2 O 3 The thickness of the composite coating is 800μm, Cr 2 O 3 The coating thickness is 200 μm.

[0048] NiAl coating is prepared by thermal spraying method from commercially available NiAl powder of 15~45μm, Cr 2 O 3 The coating is made of commercially available 20~60μm Cr 2 O 3 The powder is prepared by thermal spraying method, NiAl-Cr 2 O 3 The composite coating is a combination of the above-mentioned NiAl and Cr 2 O 3 The powder is mixed according to the mass ratio of 15:85 and prepared by thermal spraying method.

[0049] The specific preparation method of the repair layer is as follows:

[0050] Before spraying, the substrate is cleaned, oil...

Example Embodiment

[0059] Example 2

[0060] In this embodiment, a scrapped roll is used as the substrate, and a repair layer is prepared on the surface of the substrate. The repair layer is sequentially coated from the surface of the substrate with NiCrBSiFe, NiCrBSiFe-Cr 2 O 3 Composite coating and Cr 2 O 3 Coating composition. In this embodiment, the thickness of the NiCrBSiFe coating is 90 μm, and the NiCrBSiFe-Cr 2 O 3 The thickness of the composite coating is 850μm, Cr 2 O 3 The coating thickness is 200 μm.

[0061] NiCrBSiFe coating is prepared by thermal spraying method from commercially available NiCrBSiFe powder of 15~45μm, Cr 2 O 3 The coating is made of commercially available 20~60μm Cr 2 O 3 The powder is prepared by thermal spraying method, NiCrBSiFe-Cr 2 O 3 The composite coating is a combination of the above NiCrBSiFe and Cr 2 O 3 The powder is mixed according to the mass ratio of 20:80 and prepared by thermal spraying method.

[0062] The specific preparation method of the above-menti...

Example Embodiment

[0067] Example 3

[0068] In this embodiment, a scrap roll is used as the substrate, and a repair layer is prepared on the surface of the substrate. The repair layer is composed of NiAl coating, NiAl-Cr 3 C 2 Composite coating and Cr 3 C 2 Coating composition. NiAl coating thickness is 110μm, NiAl-Cr 3 C 2 The thickness of the composite coating is 850μm, Cr 3 C 2 The coating thickness is 250 μm.

[0069] NiAl coating is prepared by thermal spraying method from commercially available NiAl powder of 15~45μm, Cr 3 C 2 The coating is made of commercially available 15~45μm Cr 3 C 2 The powder is prepared by thermal spraying method, NiAl-Cr 3 C 2 The composite coating is a combination of the above-mentioned NiAl and Cr 3 C 2 The powder is mixed according to the mass ratio of 20:80 and prepared by thermal spraying method.

[0070] The specific preparation method of the above-mentioned repair layer is the same as that in Example 1, except that the powders are NiAl and Cr respectively. 3 C 2...

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Abstract

The invention discloses a roller repair layer and a roller repair method. According to the roller repair layer, a metal layer, a metal-ceramic composite layer and a ceramic layer are thermally sprayed on a base body in sequence from the surface of the base body to the outside. The roller repair method comprises the steps that cleaning, oil removal, rust removal and surface roughening are conducted on the base body, the metal layer, the metal-ceramic composite layer and the ceramic layer are thermally sprayed on the surface of the base body in sequence, and the repair layer is ground until meeting the roller precision. The roller repair layer used for repairing the roller has the advantages of being low in comprehensive cost, easy to manufacture, remarkable in effect, and suitable for large-scale production. The roller repair method can replace a bead weld technology which is widely used at present, and the service life of the roller is remarkably prolonged. Meanwhile, the roller repair method is a green manufacturing technology meeting the national strategy of circular economy and sustainable development, and has wide application prospects and economic benefits.

Description

technical field [0001] The invention relates to the technical field of roll surface treatment, in particular to the roll repair technology. Background technique [0002] my country is a big country in steel production and consumption, among which rolled products account for about 85%-90%. A roll is a tool for plastically deforming (rolled) metals. It is an important part of the rolling mill in a rolling mill. Usually, a pair or a set of rolls are used to roll the pressure to roll the steel. It is mainly subjected to dynamic and static loads, wear and temperature changes during rolling. The roll is an indispensable part of the rolling mill, and it is also an important factor affecting the cost and efficiency of rolling steel production. The quality of the roll directly affects the consumption and production cost of the roll. As the roll is put into use, wear is inevitable. The wear changes the initial roll shape of the work roll, deteriorates the quality of the roll surfac...

Claims

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Application Information

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IPC IPC(8): B21B28/02C23C4/04C23C4/12C23C4/06C23C4/073C23C4/08C23C4/10C23C4/11C23C4/126C23C4/129C23C4/134
Inventor 袁建辉李华黄伟东
Owner SHAOXING SPRAY MICRONANO TECH
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