JPS59215418A - Production of stainless steel strip finished by polishing and having excellent resistance to staining - Google Patents

Abstract

PURPOSE:To produce a stainless steel strip having excellent resistance to staining by polishing the cold-rolled stainless steel strip by means of endless belts deposited with abrasive grains of specific grain sizes then polishing the same with cork belts deposited with abrasive grains of small grain sizes. CONSTITUTION:A steel strip 5 from a coil 6 is passed through a leveler 8 and a welding machine 9 and is fed at 10-50m/min traveling speed to belt polishing machines 10a-10d. Endless belts 11a-11d deposited with #240-#320 abrasive grains are respectively attached to the machines 10a-10d and are rotated at 900-2,100m/min circumferential speed to polish the strip 5. The strip 5 is then polished in scorers 12a, 12b attached with cork belts 13a, 13b deposited with #320-#400 abrasive grains by the belts 13a, 13b fed at 0.02-0.2m/min feed speed. The polished steel strip is taken up on a tension reel 20. The strip 5 completed of the polishing is further subjected to annealing, pickling and temper rolling.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a stainless steel strip with excellent stain resistance.

Polished stainless steel strip Doshihashiya 3, A4, Ya7
Although there are various types of polishing methods available in the past, those with a fine and uniform polished surface are considered to be good in terms of appearance.

However, when such a polished stainless steel strip is used for a material that requires cleanliness, such as a sink top material, it is difficult to remove any food that may be attached to it, in addition to its appearance. In addition, it is necessary that the stains remain inconspicuous after removal.

However, when used for sink top materials with conventional A3 or Ya4 finishes, the surface roughness is large, so if you wipe it with a cloth or detergent, the deposits will remain in the polishing mouth and become dirty. It could not be removed. To solve this problem, it would be best to use a material with a small surface roughness, such as one with an A7 finish, but
On the other hand, finished kimonos have a rough surface, so if even a small amount of kimono remains, there is a problem that the stains will be noticeable and the kimono will not be visible.

In view of the fact that conventional polished stainless steel copper strips have had such problems as soil resistance, the present invention provides a method for manufacturing polished stainless steel copper strips that does not have such problems.

In the manufacturing method of the present invention, cold rolling is followed by polishing, followed by annealing, pickling, and temper rolling.

With the present invention, the reason why polishing is performed after cold rolling is that when polishing is performed after annealing and pickling, the material is softened and the polishing becomes rough, so it is better to perform polishing after cold rolling. The surface may be work-hardened and hardened (fine polishing may not be possible).The reason for annealing and pickling after polishing is to soften the polishing grains since it is carried out using a polishing tool. The skorte is polished by pressing it against the steel strip of the new abrasive belt surface, so the abrasive material is sharp.For this reason, annealing and pickling are performed to make the polishing surface soft (
do. If you wish to keep the polished surface as it has been polished by skote, you can perform bright annealing instead of annealing and pickling. The reason why the awn is subjected to temper rolling after annealing and pickling is to crush large convex parts for polishing which are good for smoothing by annealing and pickling, and to smoothen the entire polished surface.

In the polishing process of the present invention, 4 steel strips are applied to a polishing line equipped with a plurality of Beltori F ordinal stones and scolan, and as a first step, belt sanders 2 to 4 are equipped with an endless belt with 240 to 320 abrasive grains. The surface is adjusted by polishing on a table, and then, in the second step, polishing is performed on 22 or more Sufu machines equipped with a cork belt with #320 to 400 abrasive grains to form polishing marks. Here, the skote is a device that polishes the steel strip by pressing it against a spring-loaded cork pelton copper strip from one side in the threading direction, and then winding it up on the other side after seven steps. It is sharp as if it had been polished. As shown in the cross section of FIG. 1, a cork belt has cork grains 3 adhered to a belt base material 1 with an adhesive 2, and abrasive grains are attached to the adhesive 22 and the cork grains 3 on top of the belt base material 1. 4 is the glued awn.

When polishing according to the present invention, in the first step as described above, 2
When using an endless belt with an abrasive grain size of 40 to 320, it is necessary to use a cork belt with an abrasive grain coarser than 240. This is because coarse polishing particles remain, and if a belt with a finer than 320 is used, a large number of belt polishers are required to remove all the bare surface of the copper strip surface. Even if the above-mentioned grain summer endless belt roller is used, it is impossible to remove all of the skin with one belt grinder, and two or more are required. However, if there are 4 units, even if there are surface scratches, it can be removed, so the maximum is 4 units.
A stand is sufficient.

On the other hand, in the second stage, a cork belt with an abrasive grain of 320 to 400 is used.If the abrasive grain is coarser than #320, (d) the abrasion becomes coarse and it is difficult to remove many kimonos. If you use something thinner than 400mm, the gloss will be high (and the traces of the removal of the kimono will be noticeable).

Polishing with 22 or more ZutaSuf machines is because it is not possible to obtain a soft surface for polishing with one machine. Normally you get it for soft polishing! -T2 machines are sufficient, and if three machines are used, good polishing performance can be obtained, but the cost is high.

The plate passing speed during polishing in the first and second stages is preferably 10 to 50 m/min.

Also, the endless belt circumferential speed of the belt sander is 900~2
It is preferable that the cork belt feeding speed of the skate is 0.02 to 0.2 m/min at a circumferential speed of 100 m/min. If the sheet threading speed, belt circumferential speed, or feeding speed is faster than these, the long awn of the polishing pattern will become too short and the appearance will not be good.On the other hand, if it is slow, the length for polishing will be too long.
If too much is used, the appearance will not be good, productivity will also decrease, and costs will increase.

Figure 2 shows an embodiment of the polishing method on the polishing line, in which a copper strip 5 is set on a coil 6 and a payoff reel 7, from which the III 5 is sent out.

Hey, t 71J - After correcting the shape of the steel strip 5 sent from Lua with a repeller 8, it is connected to the preceding copper strip at a welding spot 9.
Thread the belt to M Iso.

For polishing, there are 4 belt polishers IQa on the entry side.

10b, 10cs and 10d are arranged, and each of these belt sanders 10a to 10dK 240 to 320 abrasive grains N@:r-:/doL//C belt 11a, 1 lb, 1
Attach the leg and 11d Kaorishichi grooves and polish them while rotating. Next, belt polishing ff110a~10d
After that, two scolas 12a and 12by are placed, and a spring is applied to each of these scolas 12a3 and 12b from one side in the sheet threading direction of cork pels 13a and 13b'& Kotei 5. It is attached so that it is pressed against the band 5 and then wound up on the other side, and is polished while being sent out. In Figure 8, 14f'i is a breaker roll, 15 is a billy roll that makes the copper band 5 cappend, 16s and 17 are endless belts, respectively.
Contact roll 2 and idle roll 18 are Nonotsuku Anzorol, which are stretched and rotated at 11 dv.

After being pressed and polished as described above, the steel strip 5 is wound onto a tension reel 20 while inserting a slip sheet 19 to prevent slippage between the layers, and the welded portion is cut with a shear 21.

Conventional known conditions are sufficient for the annealing and pickling after polishing, and conventional known conditions for temper rolling after the annealing and pickling, i.e., a rolling ratio of 0.5 to L5%, are sufficient.

The production of steel sheets for use in sinks, etc. is carried out by passing the steel strips through shearing equipment after temper rolling.

Table 1 shows SO8304 hot-rolled steel sheets that have been cold-rolled using a conventional method and then passed through a polishing line, with an abrasiveness of 320 and a belt sander equipped with an endless belt. After polishing with a four-way wheel to adjust the height and surface, then polish with a #400 abrasive cork belt and a SFU-22 machine for polishing, and then annealing and pickling and rolling reduction using the usual method. Perform temper rolling at LO%,
Next, the material of the present invention and the conventional material (including improved products, both of which are 5LIS304) were subjected to shearing and were subjected to shearing as shown in Figure 2.
``''Let the substance adhere to it and leave it for 24 hours, then wash it with soapy water, once with tap water, twice with ethyl alcohol, and twice with acetone to remove the dirt. This is the result of visual observation of the traces and judgment based on the criteria in Table 3.

(Note 1) Modifications 1 to 3 of A7 are all coarser than the reference point 7 (and the roughness of the Senma eyes is larger in the order of 1 (3):2.

(Note 2) The defi of HL is rougher than that of standard IN.

fe 2 Table 3 As is clear from Table 1, the products produced according to the present invention have excellent stain resistance.

The surface roughness of each finishing material of Shishi's present invention, Nagoya 7 (commercially available material 1), and A4 was approximately as follows.

Finishing material Rnrax (μ,) Rz
(μ) Present invention 0.8 0.6A
7 (Commercially available material 1) 0.51 0.
2 mm 4 1.2 L 1 or more (2 mm) The polished stainless steel strip manufactured according to the present invention can easily remove deposits, and the marks on other kimonos will not be noticeable.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a cork belt attached to a skorte. FIG. 2 shows an embodiment of the polishing method according to the second manufacturing method of the present invention. 1... Belt x material, 2... Adhesive material, 3... Cork grains, 4... Abrasive grains, 5... Copper band, 6... Coil, 7...
...Payoff reel, 8...Repee 2-19...Welding machine, 10a-10d...## Belt polisher, 11a-11d...240-320
Endless belt with hundreds of grains, 12a, 12b... Skote, iaa, 13b = 320-400 abrasive o
p Cork belt, 14... Breaker roll, 15...
・Billy roll, 16...Contact roll, 17・
・・Idle roll, 1B・・Tanku Asoso' roll, 19・Paper, 20・Tension reel, 2
1...Shar patent applicant Nissin fJ! ,′! Copper Co., Ltd. Agent Susumu rJ! - Nao

Claims (1)

[Claims] (11ii!1 Imperial intermittent cold rolling multiple belt polishing e
Then, the plate was passed through a polishing line installed with a scolan. # First, as a first step, use a belt sander with an abrasiveness of 240 to 820 and an endless belt chipping capacity of 2 to 4 mm.
abrasive, and then as a second step, abrasive grains of 820# to 400 were attached to a cork belt.
Polished at z-level or above, and after completion of these polishing steps, annealing and pickling 3 and temper rolling are performed sequentially.It has excellent stain resistance.
Method of manufacturing polished stainless steel strip. (2) The polishing line is run at a speed of 7 rlO to 50 m7, and the circumference of the endless belt is Z90 (1 to 210 m).
0m/min, cork belt feeding speed 0.02~Q, 2
1. A method for producing a polished stainless steel strip having excellent stain resistance as claimed in claim 1, wherein the polishing is performed for 7 minutes.