JPH0327807A - Roll for preventing foreign matter from adhering to surface - Google Patents

Abstract

PURPOSE:To form a smooth dull texture and to prevent a foreign matter from adhering by atomizing and fixing a resin onto a sprayed cover of a roll having a dull texture in which sprayed deposit of a composite material or ceramics is performed to the surface. CONSTITUTION:After grinding, a composite material or ceramics 3 is brought to sprayed deposit to the surface of a roll base material 1 to which dull working is executed. Subsequently, by using a device covered with the composite material or the ceramics 3, a resin 5 is sprayed in an atomized state. In such a way, minute and sharp ruggedness of the composite material or the ceramics 3 are filled up with the resin 5 and a dull texture on which the surface is smooth is formed, and adhesion of a foreign matter can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a roll that prevents foreign matter from adhering to the surface of the roll having a dull texture.

[Prior Art] As shown in a partially enlarged view in FIG. 3, the roughness profile of a rounded roll in which the roll surface base material l is coated with composite material or ceramics 3 is that in addition to large irregularities 6. ,
There are many fine and sharp unevennesses 7. These fine and sharp irregularities 7 are unavoidable due to the principle of thermal spray coating.

Since these irregularities have a mechanical anchor effect, foreign matter 8 easily adheres to the roll and is difficult to peel off when the roll is in use.

As a result, the attached foreign matter becomes convex and transfers to the product on the roll, or the attached foreign matter fills up the dots on the roll surface and loses the function of the dots. On the other hand, the roughness profile obtained by plating with Cr or the like tends to be smoother and has fewer fine and sharp irregularities than that obtained by thermal spraying.

JP-A-62-01-6808 discloses a technique for improving the roughness profile by applying Cr plating 2 on a thermally sprayed coating of composite materials or ceramics 3, as shown in FIG.

Problems to be Solved by the Invention 1 Looking at the roll manufacturing process of this disclosure, after coating the roll surface base material 1 with a composite material or ceramics 3 (WC-co, etc.). It is to be covered with Cr plating 2.
By the way, in order to apply Cr plating 2, the roll is immersed in a plating solution, and as shown in FIG.
is open, and it reaches up to 4 materials 1. Therefore,
The plating water penetrates into the base material and corrodes the base material l on the roll surface. This causes peeling between the roll surface base material 1 and the composite material or ceramic 3.

Furthermore, since the composite material or ceramics 3 has poor electrical conductivity, the strength of the Cr plating film decreases and it easily peels off. For the above two reasons, JP-A-62-01
There is still room for improvement in Publication No. 6808.

Therefore, an object of the present invention is to solve the above-mentioned problems and provide a method for preventing adhesion of foreign matter.

[Means to solve the problem]

The present invention prevents foreign matter from adhering to the roll surface by spraying resin onto the thermal spray coating material and fixing it on the roll, which is made of composite material or ceramic (spray coating material) and has a dull mesh. This is a roll that was prevented.

[Effect] FIG. 1 shows a conceptual diagram of the present invention.

After polishing, a certain composite material 1EJ or ceramics 3 is thermally sprayed onto the roll base material 1 that has undergone glue processing, and then a resin 5 (Si-based or Teflon system, etc.) in the form of a spray. This allows composite materials or ceramics3
The fine and sharp irregularities of the profile can be filled with the resin 5 to form smooth dowels on the surface.

Coating the resin 5 onto the composite material or ceramics 3 using this spraying method is extremely easy. Furthermore, the type of resin can be selected depending on the usage environment. Furthermore, many types of composite materials can be selected.

[Effects of the Invention j] The roll manufactured by the method according to the present invention was applied to the roll on the entry side of the cleaning tank of a continuous annealing line.

As a result, in the past, quality defects occurred due to the transfer of foreign matter to the stubs and strips, and the rolls had to be replaced after about two months, but by using the roll of the present invention, these problems can be avoided. The roll life can be extended several times.

In addition, as a result of applying the roll of the present invention to the priddle roll on the tandem mill outlet side of a continuous cold rolling line, the roll was previously forced to be replaced after about a month due to the above-mentioned reasons. This made it possible to prevent these occurrences and extend the life of the roll several times.

[Brief explanation of drawings]

FIG. 1 is a conceptual profile of roughness illustrating the present invention;
The figure shows the surface roughness profile of a roll coated with Cr plating, Figure 3 shows the surface roughness profile of a roll coated with ivtm composite material, and Figure 4 shows the cross-sectional structure of the composite material. l...Roll surface wood 2...Cr plating 3...Composite material 4...Composite material holes 5...Resin application Kawasaki Steel Corporation

Claims (1)

[Claims] 1. A roll whose surface is thermally sprayed with a composite material or ceramics and has a dull pattern, which prevents foreign matter from adhering to the surface, which is characterized by spraying and fixing a resin onto the thermally sprayed coating.