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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 used in the field of roll repair and manufacture at home and abroad. Problems such as easy detachment of the coating during the process

Method used

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  • Roller repair layer and roller repair method

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Effect test

Embodiment 1

[0047] In this embodiment, a repair layer is prepared on the surface of the substrate with the scrapped roll as 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 example, the NiAl coating thickness is 100 μm, NiAl-Cr 2 o 3 Composite coating thickness is 800μm, Cr 2 o 3 The coating thickness is 200 μm.

[0048] The NiAl coating is prepared by thermal spraying of commercially available 15-45μm NiAl powder, Cr 2 o 3 The coating is made of commercially available 20~60μm Cr 2 o 3 Powder prepared by thermal spraying method, NiAl-Cr 2 o 3 Composite coating is the above 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, clean the substrate, remove oil and rust, and use 20-mesh alloy sand for surface blasting pretreatment ...

Embodiment 2

[0060] In this embodiment, a repair layer is prepared on the surface of the substrate with the scrapped roll as the substrate. The repair layer is composed of NiCrBSiFe coating, NiCrBSiFe-Cr coating from the substrate surface to the outside. 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 Composite coating thickness is 850μm, Cr 2 o 3 The coating thickness is 200 μm.

[0061] The NiCrBSiFe coating is prepared by thermal spraying method of commercially available NiCrBSiFe powder of 15~45μm, Cr 2 o 3 The coating is made of commercially available 20~60μm Cr 2 o 3 Powder prepared by thermal spraying method, NiCrBSiFe-Cr 2 o 3 Composite coating is 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 repair layer is the same as the pr...

Embodiment 3

[0068] In this embodiment, a repair layer is prepared on the surface of the substrate with the scrapped roll as 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 Composite coating thickness is 850μm, Cr 3 C 2 The coating thickness is 250 μm.

[0069] The NiAl coating is prepared by thermal spraying of commercially available 15-45μm NiAl powder, Cr 3 C 2 The coating is made of commercially available 15~45μm Cr 3 C 2 Powder prepared by thermal spraying method, NiAl-Cr 3 C 2 Composite coating is the above 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 the preparation method in Example 1, the difference is that the powders are respectively NiAl and Cr 3 C 2 powder to obtain a repair l...

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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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