JPH08267105A - Manufacture of high-gloss stainless steel strip - Google Patents

Abstract

PURPOSE: To roll a high-gloss steel strip without meandering by making the angle of each of ground grooves formed between its extension direction and the circumferential direction of a work roll within a prescribed range and assem bling upper and lower work rolls so that the extension directions of their ground grooves are crossed with each other on the side of a material to be rolled. CONSTITUTION: Grinding for grooves is executed so that the angle Φformed between the extension direction of the surface roughness of the work roll and the circumferential direction of the work roll 2 is made within the range of tan<-1> (λa/L) to 5 deg., where the average pitch of surface roughness in the width direction of the steel strip 1 on the inlet side is expressed by λa and the contact arc length of roll bite of the work roll at the time of rolling by L. By assembling the work rolls so that the extension directions of respective surface roughness of the work rolls are crossed with each other on the side of the material to be rolled to execute rolling, the material to be rolled having excellent surface gloss is rolled without meandering. The recessed parts in a certain position on the surface of the steel strip 1 are successively squeezed with different projecting parts of the work roll 2 and rolling oil is not sealed in the recessed parts on the surface of the steel strip 1, so that the surface gloss is improved.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a stainless cold-rolled steel strip having an excellent surface gloss.

[0002]

2. Description of the Related Art Conventionally, cold-rolled stainless steel strip is produced by annealing pickled hot-rolled steel strip and then cold-rolling it with a Sendzimir mill using a work roll with a diameter of 150 mm or less. Bright annealing is performed and the rolling reduction is 1.2.
It was manufactured by subjecting it to finish temper rolling of not more than%.

The stainless cold-rolled steel strip manufactured through these steps is often used as it is on the surface immediately after finish temper rolling in the case of a ferrite system represented by SUS430, for example. Excellent surface gloss is required for these products. Further, in the case of an austenitic type typified by SUS304, buffing is often performed after finish temper rolling, and it is required to exhibit excellent surface gloss after this buffing.

Therefore, conventionally, in cold rolling using a small-diameter work roll such as a Sendzimir mill, for example, Japanese Unexamined Patent Publication No.
The method of devising the roll roughness shown in -13362 has been adopted. However, even with this method, a significantly large roughness of the surface of the steel strip annealed and pickled after hot rolling before cold rolling remains until after cold rolling, so that a satisfactory surface gloss cannot be obtained.

On the other hand, as a method for producing a stainless cold-rolled steel strip with high efficiency by significantly shortening the rolling time, the diameter 1
A method of rolling with a large diameter work roll of 50 mmφ or more is adopted. However, the surface roughness of steel strip cold-rolled with a large-diameter work roll is also extremely large on the surface of annealed and pickled hot-rolled steel strip, which remains until after cold-rolling. Even larger than when cold rolled using rolls. Therefore, the product was not suitable for applications requiring surface gloss.

Then, as a method for further improving the surface gloss of stainless steel products, for example, JP-A-5-57304 and JP-A-5-57304.
A method of intersecting work rolls such as 123704 during rolling is disclosed. When these methods are adopted, there is a problem that a large and complicated equipment for intersecting the work rolls is required and the equipment cost is extremely high. In addition, JP-A-5-25
The 3604 has a knurled groove 5 ~
A method of applying to the roll surface at an angle of 60 degrees is disclosed. In this method, since the angle was too large, the groove remained on the surface of the steel strip after rolling and the gloss was lowered.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the surface gloss of a stainless steel strip when it is rolled in a cold tandem mill.

[0008]

The present invention as set forth in claim 1, wherein the hot-rolled stainless steel strip is annealed and pickled, and then unlubricated,
Alternatively, apply a liquid lubricant to the work roll surface with a thickness of 1 μm or less, perform pretreatment rolling, and then use a cold tandem mill consisting of multiple stands to polish the work roll surface at an angle to the circumferential direction. Grooves are provided, the average pitch of the surface roughness in the width direction of the entry side steel strip is λa, the average pitch of the roughness in the width direction of the work roll surface is λr, the average surface roughness in the width direction of the entry side steel strip. The average pitch λar of the composite roughness defined by the pitch λa and the average pitch λr of the roughness of the work roll surface in the width direction is expressed as {(λa ² + λr ² ) /
2} ^1/2 , where L is the contact arc length of the roll bite of the work roll at the time of rolling, the angle of the extending direction of the polishing groove portion of the work roll surface with respect to the circumferential direction of the work roll is
tan ^-1 (λa / L) or more, or tan ^-1 (λr / L) or more, or tan ^-1 (λar / L) or more and 5 ° or less, the upper and lower work rolls extend in the polishing groove portion. The material is rolled so that the directions thereof cross each other on the rolled material side.

According to a second aspect of the present invention, the work roll according to the first aspect is sequentially incorporated into one or more stands from the first stand or the last stand of the cold tandem mill and rolled.

According to a third aspect of the present invention, after rolling with the cold tandem mill according to the first or second aspect, rolling is performed with a work roll having a diameter of 150 mm or less.

[0011]

In order to improve the surface gloss of the cold rolled stainless steel strip, it is known that reducing the surface roughness of the steel strip after cold rolling, which influences the surface roughness of the product, is effective.

On the other hand, according to the study by the present inventors, a part of the surface roughness of the steel strip before cold rolling remains in the surface roughness of the steel strip after cold rolling. We have found that the surface gloss is significantly impaired, which is explained as follows.

The hot rolled stainless steel strip is annealed after hot rolling and pickled, or annealed after hot rolling, mechanically descaled and pickled to obtain a steel strip before cold rolling. It
The surface roughness of the steel strip before cold rolling is significantly increased to Ra 2 to 4 μm by mechanical descaling such as shot blasting during pickling and / or pickling with sulfuric acid. Then, during cold tandem rolling, a large amount of rolling oil is supplied to the surface of the roll and the steel strip from the inlet side of the rolling mill, so rolling oil of several μm or more adheres to the surface of the work roll and the steel strip. Then, with the rolling oil remaining in the recesses on the surface of the steel strip,
Bites into the roll bite. Here, the rolling oil is supplied for lubrication and cooling, and is used to prevent the occurrence of seizure flaws such as heat streaks and to perform stable rolling. The recesses on the surface of the steel strip where rolling oil accumulates are slightly smaller than before rolling because liquids such as rolling oil are much less likely to be compressed than gases such as air, but most are smooth during rolling. It does not turn into a residue and remains after rolling. Therefore, after cold rolling, finish annealing pickling or finish bright annealing, finish temper rolling, or further buffing is performed to obtain a product having a surface roughness Ra of 0.1 μm or less. The effect remains and the surface gloss of the product is significantly impaired.

From the above, in order to produce a steel strip having a good surface gloss, the recesses on the surface of the steel strip before cold rolling are sufficiently contacted with the projections of the surface roughness of the work roll during cold rolling, The reason is to reduce the recesses on the surface of the belt.

By the way, it has been known that the shallow minute unevenness of about 1/10 μm at the maximum depth can be reduced, but the maximum roughness is tens of μm, which is extremely large and the roughness of the surface of the steel strip before cold rolling is significantly increased. It could not be reduced.

Upon investigating the cause of this, in a normal work roll, the steel strip is pressed down by the work roll in the roll bite, and while moving from the inlet to the outlet of the roll bite, the recess at a certain position on the surface of the steel strip is This is because the work roll surface roughness may only come into contact with the concave portions, so that a portion that is not crushed too much occurs.

Therefore, as a result of diligent study by the present inventors, as shown in FIG. 1, the angle φ in the extending direction of the unevenness of the work roll surface roughness with respect to the circumferential direction of the work roll 2 is
When the average pitch of the surface roughness in the width direction of the entrance side steel strip 1 is λa and the contact arc length of the roll bite of the work roll during rolling is L, tan ^-1 (λa / L) or more, and it is assembled vertically By rolling with, the surface roughness of the steel strip can be reduced and the surface gloss can be improved. In the present invention, the extending direction of the unevenness of the work roll surface roughness is an angle φ with respect to the circumferential direction of the work roll.
Because of the inclination, the steel strip is rolled down by the work roll in the roll bite, and while moving from the inlet to the exit of the roll bite, the recesses at certain positions on the surface of the steel strip are sequentially different convex parts on the surface of the work roll. Will be crushed by. As a result, the roughness of the roll can be brought into sufficient contact with the recesses on the surface of the steel strip, and rolling oil is not enclosed in the recesses on the surface of the steel strip, so that the surface gloss can be improved.

Here, the contact arc length L of the roll bite of the work roll is determined by (d.Δh / 2) ^1/2 from the work roll diameter d and the reduction amount Δh of the plate thickness, and is calculated in the width direction of the entry side steel strip. The average pitch λa of the surface roughness is obtained by the equation (1) from the unevenness interval Sai on the sectional curve of the surface roughness shown in FIG. 4, for example.

[Equation 1]

Assuming that the angle φ in the extending direction of the unevenness of the surface roughness of the work roll is λr, which is the average pitch of the roughness in the width direction of the work roll surface as shown in FIG. 2, tan ^-1 (λr /
L) or more, or as shown in FIG. 3, a composite roughness defined by the average pitch λa of the surface roughness in the width direction of the entry side steel strip and the average pitch λr of the roughness in the width direction of the work roll surface. When the average pitch λar is {(λa ² + λr ² ) / 2} ^1-2 , the same effect is obtained even if tan ^-1 (λar / L) or more.

On the other hand, if the angle φ is larger than 5 °,
Since the frictional resistance during rolling increases, the recesses of the roll roughness remain on the surface of the steel strip and the gloss decreases, so it is set to 5 ° or less. Further, the extending direction of the unevenness of the work roll surface roughness of the upper and lower, if not installed so as to intersect vertically, the force to move in the width direction of the steel strip occurs in the same direction in the upper and lower,
Since the steel strip meanders and rolling becomes unstable, the polishing groove is
Install by crossing vertically. Even if the polishing grooves of the upper and lower work rolls are assembled so as to intersect with each other in the vertical direction, the angle φ is more preferably 1.5 ° or less in order to suppress the meandering when the upper and lower friction coefficients are different. .

The groove extending on the surface of the work roll at the angle φ is not limited to the groove formed by polishing, but may be formed by cutting or the like.

The work roll of the present invention may be applied to all stands, but in consideration of the effect of improving gloss and cost, the stand on the front stage side including the first stand of the tandem rolling mill or the rear stage including the final stand. It may be used as a stand.
When it is used for the stand on the upstream side including the first stand of the tandem rolling mill, large concave portions on the surface of the material before cold rolling can be sufficiently reduced at an early stage, and the surface gloss is improved. Further, when the work roll of the present invention is used in the latter stand including the final stand of the tandem rolling mill, the recesses on the surface of the steel sheet, which could not be reduced to the former stand, can be sufficiently reduced and the surface gloss is remarkably improved.

Further, according to the present invention, before the cold tandem rolling, the recesses on the surface of the steel sheet are made small so that the rolling oil to be enclosed is reduced and the recesses are easily crushed. That is, the steel strip before cold tandem rolling is pre-treated by rolling without fluid lubricant such as rolling oil or by pre-treatment by forming a film of liquid lubricant of 1 μm or less on the surface of the work roll. It is rolled. Pretreatment rolling to make the recesses on the surface of the steel sheet small, the synergistic effect with the effect that the extending direction of the unevenness of the work roll surface roughness of the present invention is inclined with respect to the circumferential direction, the gloss becomes Improved.

If the work roll and the steel strip are not lubricated in the pretreatment rolling, the work roll and the steel strip are seized, the coefficient of friction is significantly increased, the rolling load is increased, and a sufficient reduction ratio is obtained to reduce the irregularities on the surface of the steel strip. Sometimes there is not. In such a case, most of the irregularities on the surface of the steel strip can be eliminated by forming a liquid lubricant film thickness of 1 μm or less on the surface of the work roll and performing pretreatment. The smaller the film thickness of the liquid lubricant, the more the unevenness on the surface of the steel strip can be reduced. still,
The liquid lubricant for pretreatment rolling is suitable for reducing unevenness on the surface of the steel strip by preventing seizure of water, rolling oil, and skin pass oil. If the thickness of the liquid lubricant exceeds 1 μm, a large amount of irregularities on the surface of the steel strip will remain and cannot be erased by cold tandem rolling, so the thickness of the liquid lubricant should be 1 μm or less.

When cold rolling using the work roll of the present invention and further rolling using a work roll having a diameter of 150 mm or less, rolling oil is less likely to be trapped between the work roll and the steel strip, and the steel strip surface Since it is possible to crush the minute defects existing in the steel sheet, the surface gloss of the steel strip can be improved.

[0026]

EXAMPLES A work roll in cold tandem rolling according to the present invention will be described below in which the extending direction of the groove and the convex portion of the surface roughness is such that the surface roughness in the width direction of the entry side steel strip with respect to the circumferential direction. When the average pitch of the length is λa and the contact arc length of the roll bite of the work roll during rolling is L, the work roll is ground to a range of tan ^-1 (λa / L) or more and 5 ° or less, Were rolled up and down so as to intersect each other on the side of the material to be rolled in the extending direction.

(Example 1) Ferritic stainless steel strip SUS430 which was annealed and pickled after hot rolling was used as Examples 1-1 and 1-2 of the present invention without lubrication or with a fluid lubricant having a thickness of 0.7 on a work roll surface. μm coating and pre-treatment rolling, and then, on the surface of the work rolls of the three stands in the front stage of the five-stand cold tandem mill, that is, the work rolls of the first stand to the third stand, grinding groove portions having angles satisfying the range of the present invention are provided. The work rolls were made to extend, and the work rolls were incorporated vertically and rolled so that the extending directions intersect each other on the side of the material to be rolled.

Comparative Example 1-1 is a case where the pretreatment rolling is not performed on the above Example, and Comparative Example 1-2 is a case where the polishing groove portions of the upper and lower work rolls are extended as compared with Example 1-1. This is a case where the rolling direction is parallel to the rolled material, and Comparative Example 1
-3, compared with Example 1-1, on the surface of the work rolls of the first stand to the third stand of the cold tandem mill,
In the case where the polishing groove portion having an angle outside the scope of the present invention is extended, Comparative Example 1-4 applies a fluid lubricant to the surface of the work roll in a thickness of 1.2 μm, pre-treatment-rolls it, and cools the cold tandem mill. This is a case where polishing groove portions having angles deviating from the scope of the present invention are extended on the surfaces of the work rolls of the first stand to the third stand.

The conventional example is a case where the work rolls which are normally polished are incorporated into the work rolls of all the stands without performing the pretreatment rolling.

In the cold tandem mill, rolling was performed while supplying a large amount of rolling oil, and normally ground work rolls were used for the fourth stand and the fifth stand. Then finish annealing
After pickling and temper rolling, the surface gloss of the steel strip was examined.

The surface gloss of the steel strip is measured according to JIS Z8741 Gloss Measurement Method 5 (Gs 20 °). In order of good gloss, a gloss of 950 or more is special A, a gloss of 800 to 9500 is A, and a gloss of 600.
.About.800 was designated as B, glossiness of 400 to 600 was designated as C, and glossiness of 400 or less was designated as D.

From the results shown in Table 1, it was found that the method of the present invention did not cause the meandering to make rolling impossible, and the surface gloss of the steel strip was remarkably good as compared with the comparative example and the conventional example.

[Table 1]

(Example 2) Ferrite stainless steel strip SUS430 which was annealed and pickled after hot rolling was pretreated and rolled without lubrication as Example 2 of the present invention, and each of all stands of a 5-stand cold tandem mill. To the work roll of
Polishing groove portions having an angle satisfying the range of the present invention were extended, and the work rolls were vertically assembled so that the extending directions intersect with each other on the rolled material side and rolled.

Comparative Example 1-2 is a case where the pretreatment rolling is not performed for Example 2, and Comparative Examples 2-2 and 2-3 are the same as Example 2 for all the stands. This is a case where a polishing groove portion having an angle outside the scope of the present invention is extended in the work roll.

The conventional example is a case in which the work rolls of all the stands are incorporated into the work rolls which are normally polished without performing the pretreatment rolling.

In the tandem mill, rolling was performed while supplying a large amount of rolling oil, followed by finish annealing / pickling and temper rolling, and then the surface gloss of the steel strip was examined.

The method for measuring gloss was the same as in Example 1.
From the results in Table 2, the surface gloss of the steel strip manufactured by the method of the present invention was remarkably good as compared with the comparative example and the conventional example.

[Table 2]

(Example 3) Ferrite stainless steel strip SUS430 which was annealed and pickled after hot rolling was used as Examples 3-1 and 3-2 of the present invention without lubrication or with a fluid lubricant having a thickness of 0.9 on the work roll surface. After 3 μm coating and pre-treatment rolling, 3 stands of 5 stands cold tandem mill,
That is, from the third stand to the work roll of the fifth stand,
Polishing groove portions having an angle satisfying the range of the present invention were extended, and the work rolls were vertically assembled so that the extending directions intersect with each other on the rolled material side and rolled.

Comparative example 3-1 is a case where the pretreatment rolling is not performed on the above-mentioned example, and comparative example 3-2 and comparative example 3-3 are cold tandem with respect to example 3-1. This is a case where the work rolls of the third stand to the fifth stand of the mill are made to extend the polishing groove portions at angles deviating from the scope of the present invention.

The conventional example is a case in which the work rolls which are normally polished are incorporated into the work rolls of all the stands without performing the pretreatment rolling.

In the tandem mill, a large amount of rolling oil is supplied for rolling, and the first stand and the second stand use normally polished work rolls. Then, after finish annealing / pickling and temper rolling, the surface gloss of the steel strip was examined.

The gloss measurement method was the same as in Example 1.
From the results of Table 3, the surface gloss of the steel strip manufactured by the method of the present invention was remarkably good as compared with the comparative example and the conventional example.

[Table 3]

(Example 4) Austenitic stainless steel strip SUS430 which was annealed and pickled after hot rolling was used as Examples 4-1 and 4-2 of the present invention without lubrication or with a fluid lubricant having a thickness of 0.3 on the work roll surface. After being coated with μm and subjected to pretreatment rolling, only the work roll of the first stand of the 5-stand cold tandem mill is made to extend the polishing groove portion having an angle satisfying the scope of the present invention, and the work roll is extended in the extending direction. Were rolled up and down so that they cross each other on the side of the material to be rolled. Then, it was rolled by a cluster type rolling mill having a work roll diameter of 90 mm.

Comparative Example 4-1 is a case where the pretreatment rolling was not performed on the above-mentioned Example, and Comparative Example 4-2 was a work roll of the cluster type rolling mill in comparison with Example 4-1. This is the case where the diameter is 180 mm, and Comparative Examples 4-3 and 4
-4 is the first cold tandem mill as compared with Example 4-1.
This is a case where the work roll of the stand is provided with the polishing groove portion having an angle outside the scope of the present invention.

Conventional Example 4 is a case where the pretreatment rolling is not carried out and the work rolls which are normally polished are used for all the stands of the tandem mill.

In the tandem mill, a large amount of rolling oil is supplied for rolling, and normally used work rolls are used for the second to fifth stands. After that, it was rolled by a cluster type rolling mill using a work roll of small diameter, followed by finish annealing, pickling and temper rolling, and after buffing, the surface gloss of the steel strip was examined.

The method for measuring gloss was the same as in Example 1.

From the results shown in Table 4, the surface gloss of the steel strip produced by the method of the present invention was remarkably good as compared with the comparative example and the conventional example.

[Table 4]

(Embodiment 5) As a fifth embodiment of the present invention, an austenitic stainless steel strip SUS304 that has been annealed and pickled after hot rolling was subjected to pretreatment rolling without lubrication, and then was subjected to the fifth stand of the cold tandem mill. Polishing groove portions having an angle satisfying the scope of the present invention were extended to the work roll, and the work rolls were vertically assembled so that the extending directions intersect each other on the rolled side. Then, it was rolled by a cluster type rolling mill with a work roll diameter of 90 mm.

Comparative Example 5-1 is a case in which pretreatment rolling is not performed in comparison with Example 5, and Comparative Examples 5-2 and 5-3.
In contrast to Example 5, the work roll of the fifth stand of the cold tandem mill is provided with the polishing groove portion extending at an angle outside the scope of the present invention.

Conventional Example 5 is a case where the pretreatment rolling is not carried out and the work rolls which are normally polished are used for all stands of the tandem mill.

In the tandem mill, a large amount of rolling oil is supplied for rolling, and normally ground work rolls are used for the first to fourth stands. After that, it was rolled by a cluster type rolling mill, then subjected to finish annealing / pickling and temper rolling, and further subjected to buff polishing, and then the surface gloss of the steel strip was examined.

The method for measuring gloss was the same as in Example 1.
From the results shown in Table 5, the surface gloss of the steel strip produced by the method of the present invention was remarkably good as compared with the comparative example and the conventional example.

[Table 5]

In the above examples, the work rolls in the cold tandem rolling according to the present invention are provided such that the extending direction of the groove portions and the convex portions of the surface roughness is the width direction of the entry side steel strip with respect to the circumferential direction. Tan ^-1 where λa is the average pitch of the surface roughness and L is the contact arc length of the roll bite of the work roll during rolling.
A case was shown in which the work rolls were ground to a range of (λa / L) or more and 5 ° or less, and the work rolls were vertically assembled so that the extending directions intersect each other on the rolled material side.

(Embodiments 6 to 10) Next, the average pitch λr of the roughness in the width direction of the work roll surface is set to the average pitch λa of the surface roughness in the width direction of the entry side steel strip in the above embodiment. Tables 6 to 10 show the results of rolling with equal work rolls under the same conditions as those shown in Tables 1 to 5, respectively. The same results as those shown in Tables 1 to 5 were obtained.

That is, when the angle in the extending direction of the unevenness of the surface roughness of the work roll is defined as the average pitch of the roughness of the work roll surface in the width direction, tan ^-1 (λr / L) or more, 5
The range may be less than °.

[Table 6]

[0057]

[Table 7]

[0058]

[Table 8]

[0059]

[Table 9]

[0060]

[Table 10]

(Examples 11 to 15) Further, the synthetic roughness defined by the average pitch λa of the surface roughness in the width direction of the entry side steel strip and the average pitch λr of the roughness in the width direction of the work roll surface. Average pitch λar {{λa ² + λr ² ) / 2} ^1/2
Is a work roll in which the average pitch λar of the composite roughness is made equal to the average pitch λa of the surface roughness in the width direction of the entry side steel strip of the above-mentioned embodiment, and shown in Table 1 to Table 5, respectively. The results of rolling under the same conditions as above are shown in Tables 11 to 15, respectively. The same results as those shown in Tables 1 to 5 were obtained.

That is, the angle of the unevenness of the surface roughness of the work roll in the extending direction may be in the range of tan ⁻¹ (λar / L) or more and 5 ° or less.

[Table 11]

[0063]

[Table 12]

[0064]

[Table 13]

[0065]

[Table 14]

[0066]

[Table 15]

[0067]

The stainless cold-rolled steel strip produced according to the present invention has remarkably excellent surface gloss as compared with the steel strip produced by the conventional method, and in particular, a large diameter work roll such as a cold tandem mill. It has an excellent surface gloss equal to or higher than that when using a small-diameter work roll such as a Sendzimir mill, which was impossible to reach in the conventional case. Further, the steel strip can be stably rolled without meandering during rolling.

[Brief description of drawings]

FIG. 1 is a schematic view showing an extending direction of a polishing groove portion of a work roll according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an extending direction of a polishing groove portion of a work roll which is another embodiment of the present invention.

FIG. 3 is a schematic view showing an extending direction of a polishing groove portion of a work roll which is still another embodiment of the present invention.

FIG. 4 is a schematic diagram showing an average pitch of surface roughness.

[Explanation of symbols]

 1 Steel strip 2 Work roll

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kunio Isobe, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture, Technical Research Institute, Kawasaki Steel Co., Ltd. (72) Eisuke Kawasumi, 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba (72) Inventor Kazuhito Okada 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works

Claims (3)

[Claims] 1. A stainless steel hot-rolled steel strip is annealed and pickled, and then a non-lubricated or liquid lubricant is applied to the surface of the work roll.
Applying 1 μm or less, pre-processing and rolling, then using a cold tandem mill consisting of multiple stands, provide grinding grooves that extend at an angle to the circumferential direction on the surface of the work roll. Direction average surface roughness pitch λa, the work roll surface width direction roughness average pitch λr, the width of the inlet steel strip width direction average surface roughness λa and the work roll surface width direction The average pitch λar of the synthetic roughness defined by the average pitch λr of the roughness of {(λa ² + λr ² )
/ 2} ^1/2 , where L is the contact arc length of the roll bite of the work roll at the time of rolling, the angle in the extending direction of the polishing groove portion of the work roll surface with respect to the circumferential direction of the work roll is tan ^-1 (Λa / L) or more, or tan ^-1 (λr / L) or more, or tan ^-1 (λar / L) or more and 5 ° or less, the upper and lower work rolls are covered in the extending direction of the polishing groove portion. A method for producing a high-gloss stainless steel strip, characterized in that the rolled material is assembled so as to intersect with each other and rolled. 2. A method for manufacturing a stainless cold-rolled steel strip, wherein the work roll according to claim 1 is sequentially incorporated into one or more stands from the first stand or the last stand of a cold tandem mill and rolled. 3. A method for producing a stainless steel strip, which comprises rolling with the cold tandem mill according to claim 1 or 2 and rolling with a work roll having a diameter of 150 mm or less.