JP5709845B2 - Ferritic stainless steel sheet with excellent surface gloss and weather resistance and method for producing the same - Google Patents

Description

  The present invention relates to an alloy-saving ferritic stainless steel sheet excellent in surface gloss and weather resistance and a method for producing the same.

  Ferritic stainless steel sheets are widely used in fields that require weather resistance and surface quality in indoor environments such as home appliances and kitchen equipment. Examples of these ferritic stainless steel plates include SUS430LX and SUS430J1L in JIS standards. Non-Patent Document 1 describes typical examples of SUS430LX and SUS430J1L, which have excellent weather resistance. These ferritic stainless steels reduce C and N, Cr: 16 to 20%, Nb: 0.3 to 0.6%, and further by adding Ti, trace amounts of Cu and Mo in combination to cause pitting and cracking Deterioration of surface properties is prevented.

  For a long time, ferritic stainless steel sheets to which the above-described Nb, Ti, and the like are added are Nos. Defined in JIS G4305 and G4307. 2D finish or No. The 2B finished product has a defect that the surface gloss is inferior compared with other ferritic stainless steels (SUS430). Patent Document 1 discloses a method for producing a cold-rolled steel strip excellent in surface gloss by controlling the amount of oxide scale generated during annealing in ferritic stainless steel to which Ti, Nb, etc. are added. Patent Document 2 discloses a method for descaling a cold-rolled steel strip, a method for producing a stainless cold-rolled steel strip excellent in gloss and corrosion resistance that defines a neutral salt electrolysis-nitric acid electrolysis process, and Patent Document 3 describes a cold A method for producing a high-gloss stainless steel strip in which the roughness and lubrication conditions of a rolling work roll are controlled is disclosed.

  The above-mentioned ferritic stainless steel sheet is more economical than the austenitic stainless steel sheet containing a large amount of Ni, which has recently experienced a marked increase in price. However, it is difficult to say that SUS430LX and SUS430J1L have sufficient economic efficiency in the future against the backdrop of price fluctuations of Cr, which is a constituent element of stainless steel, and soaring Nb, which is a rare element.

  As a means for solving the above problems, a method of improving the corrosion resistance using a trace element can be considered. Patent Documents 4 and 5 disclose ferritic stainless steels that are positively added with P to improve weather resistance, weather resistance, and crevice corrosion resistance. Patent Document 4 is a high Cr, P-added ferritic stainless steel with Cr: more than 20% to 40% and P: more than 0.06% to 0.2% or less. Patent Document 5 is a P-added ferritic stainless steel having Cr: 11% to less than 20% and P: more than 0.04% to 0.2% or less. However, P is a factor that impedes manufacturability, workability, and weldability.

  So far, the present inventors have also disclosed a ferritic stainless steel having improved weather resistance using trace elements, regardless of alloying of Cr and Mo, from the viewpoint of economy. In Patent Document 6, Cr: 13 to 22%, Sn: 0.001 to 1%, C, N, Si, Mn, and P are reduced, and Ti is added as a stabilizing element 0.08 to 0.35%. Ferritic stainless steel. However, these documents do not discuss the influence on the surface gloss as described above.

Japanese Patent Laid-Open No. 61-288021 JP-A-4-232297 JP-A-8-243603 JP-A-6-172935 JP-A-7-34205 JP 2009-174036 A

Stainless Steel Handbook, 3rd Edition, P532

As described above, SUS430LX and SUS430J1L containing 16% or more of Cr and added with a stabilizing element such as Nb have a problem in economical efficiency in the future. On the other hand, ferritic stainless steel with improved weather resistance using trace elements has problems from the viewpoint of manufacturability and surface gloss. In recent years, there is an increasing demand for improving the surface gloss of stainless steel plates used for home appliances, kitchen appliances, and the like.
Therefore, the present invention has an object to achieve a dramatic improvement in surface gloss in an alloy-saving ferritic stainless steel sheet that has a Cr content of less than 16% and is comparable to SUS430LX and SUS430J1L, and achieves this. An object of the present invention is to provide an alloy-saving ferritic stainless steel sheet and a method for producing the same.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that in ferritic stainless steel with a Cr content of less than 16%, in addition to the effect of improving the weather resistance by adding Sn, The following new knowledge about the relationship between the addition of Ti and the surface gloss was obtained and the present invention was achieved.

(A) A Cr amount of 12% or more is required to exhibit the effect of improving weather resistance by adding a small amount of Sn. In addition, it is effective to reduce the C, N, Si, Mn, P, and S and to add a stabilizing element such as Nb or Ti to maintain the soundness of the passive film composed of Cr and a small amount of Sn. It is.

(B) Nb is an effective stabilizing element that exhibits an effect of improving surface gloss in addition to weather resistance. In a small amount of Sn-added steel, the effect appears from 0.05%. However, when 0.3% or more is added, the surface gloss due to the oxide scale is lowered due to the increase in the hot rolling heating temperature and the annealing temperature of the steel material.

(C) In addition to the action as a stabilizing element that fixes C and N, Ti generates Ti-based carbon sulfide (for example, Ti ₄ C ₂ S ₂ ) during hot rolling and becomes a starting point. Suppresses the generation of MnS and CaS. In a small amount of Sn-added steel, the action starts from 0.03%. However, if added in an amount of 0.15% or more, the surface gloss is lowered due to the haze caused by inclusions and the concentration of Ti in the oxide film.

(D) It has been found that the effects of Nb and Ti in the above-described small amount of Sn-added steel are manifested when they are added together in the range of 1 ≦ Nb / Ti ≦ 3.5. In other words, in order to improve the weather resistance and surface gloss of a small amount of Sn-added steel, Nb, which has a large effect of improving the surface gloss, is mainly added to suppress the starting point and maintain the soundness of the passive film. It has been found that the combined addition with Ti is effective.

(E) Although there are still many unclear points about the surface gloss improvement effect due to the addition of Nb, the internal oxidation and grain boundary oxidation during hot rolling and annealing, which are the causes of the reduction in surface gloss, are in addition to solid solution Sn. It is further suppressed by the presence of Nb. Therefore, it is speculated that the gloss improvement effect due to the addition of Nb is manifested by superposition with solute Sn.

(F) The extraction temperature after hot-rolling heating ensures the amount of scale generation for removing inclusions on the slab surface layer that induces glazing from the viewpoint of improving surface gloss, and Ti-based carbon sulfide (for example, Ti ₄ C ₂ S ₂ ) is generated, and the temperature is set to suppress the generation of MnS and CaS as starting points. In the case of a small amount of Sn-added steel with a Cr content of less than 16%, it is effective to set the temperature to 1800 to 1190 ° C.

(G) From the viewpoint of improving surface gloss, the winding after hot rolling is performed at a temperature that suppresses surface wrinkling during winding and suppresses internal oxides and grain boundary oxidation that cause a decrease in gloss. In a small amount of Sn-added steel with a Cr content of less than 16%, it is effective to set the temperature to 500 to 700 ° C. Moreover, it is effective that the annealing temperature is 980 ° C. or less from the viewpoint of ensuring gloss.

  The gist of the present invention based on the findings (a) to (g) is as follows.

(1) In mass%,
C: 0.001 to 0.03%,
Si: 0.01 to 1.0%,
Mn: 0.01 to 1.5%,
P: 0.005 to 0.05%,
S: 0.0001 to 0.01%,
Cr: 12-16%,
N: 0.001 to 0.03%,
Nb: 0.05-0.3%
Ti: 0.03-0.15%,
Al: 0.005 to 0.5%,
Sn: 0.01-1.0%,
The balance consists of Fe and inevitable impurities,
A ferritic stainless steel sheet excellent in surface gloss and weather resistance, characterized by satisfying a relationship of 1 ≦ Nb / Ti ≦ 3.5.

(2) The stainless steel plate is further in mass%,
Ni: 0.01 to 0.5%,
Cu: 0.01 to 0.5%,
Mo: 0.01 to 0.5%,
V: 0.01-0.5%
Zr: 0.01 to 0.5%,
Co: 0.01 to 0.5%
Mg: 0.0001 to 0.005%,
B: 0.0003 to 0.005%,
Ca: 0.0003 to 0.005%
The ferritic stainless steel sheet having excellent surface gloss and weather resistance according to (1), characterized in that one or more of the above are contained.

  (3) The stainless steel slab having the steel component described in the above (1) or (2) is heated, extracted from a heating furnace at an extraction temperature of 1,800 to 1,190 ° C., and then hot-rolled, and the coiling temperature is set to 500. A method for producing a ferritic stainless steel sheet excellent in surface gloss and weather resistance, characterized by winding at ~ 700 ° C.

  (4) Ferrite excellent in surface gloss and weather resistance according to (3), wherein after hot rolling is wound, cold rolling is performed, and then finish annealing is performed at 850 to 980 ° C. Of manufacturing stainless steel sheet.

  (5) The surface gloss according to (3), wherein after the hot rolling is wound, cold rolling is performed twice or more with intermediate annealing, followed by finish annealing at 850 to 980 ° C. And ferritic stainless steel sheet with excellent weather resistance.

  (6) The hot-rolled sheet annealing is performed at an annealing temperature of a recrystallization temperature or higher and 1050 ° C. or lower after the hot rolling and before cold rolling, as described in (4) or (5) Of ferritic stainless steel sheet with excellent surface gloss and weather resistance.

  According to the present invention, the surface gloss and the weather resistance are excellent, which is excellent in economic efficiency without causing an increase in alloy costs and manufacturing costs, has a weather resistance comparable to SUS430LX and SUS430J1L, and has dramatically improved the surface gloss. It is possible to obtain a remarkable effect that an alloy-saving ferritic stainless steel sheet having excellent resistance can be obtained.

Relationship between Nb / Ti amount and surface gloss Ga45 ° (0 °) Relationship between Nb / Ti amount and surface gloss Ga45 ° (90 °)

  Hereinafter, each requirement of the present invention will be described in detail. In addition, "%" display of the content of each element means "mass%".

The reason for limiting the component [I] will be described below.
C degrades weather resistance, so the upper limit of its content is 0.03%. From the viewpoint of weather resistance, the lower the content, the better. The upper limit is preferably 0.02%, more preferably 0.01%, and even more preferably 0.005%. Moreover, since excessive reduction leads to the increase in refining cost, the minimum of the content shall be 0.001%. In consideration of weather resistance and production cost, the lower limit is preferably 0.002%.

  Si may be added as a deoxidizing element. However, Si is a solid solution strengthening element, and the upper limit is set to 1.0% in order to suppress a decrease in workability. From the viewpoint of workability, the lower the content, the better. The upper limit is preferably 0.6%, more preferably 0.3%, and even more preferably 0.2%. Moreover, since excessive reduction leads to the increase in refining cost, the minimum of Si content shall be 0.01%. In consideration of workability and manufacturing cost, the lower limit is preferably 0.05%.

  Since Mn is an element that generates MnS as a starting point of wrinkling and inhibits weathering resistance, the smaller the content, the better. The upper limit of the content is set to 1.5% from the suppression of deterioration of weather resistance. From the viewpoint of weather resistance, the lower the content, the better. The upper limit is preferably 1.0%, more preferably 0.3%, and even more preferably 0.2%. Moreover, since excessive reduction leads to the increase in refining cost, the minimum of content of Mn shall be 0.01%. Preferably, considering weather resistance and manufacturing cost, the lower limit may be 0.05%.

  Since P is an element that impairs manufacturability and weldability, the smaller the content, the better. The upper limit of the content is set to 0.05% in order to suppress the decrease in manufacturability and weldability. From the viewpoint of manufacturability and weldability, the smaller the content, the better. The upper limit is preferably 0.04%, more preferably 0.03%. Moreover, since excessive reduction leads to the increase in refining cost, the lower limit of the P content is set to 0.005%. More preferably, it is good to set it as 0.01% in consideration of manufacturing cost.

  S is an impurity element and hinders weather resistance and hot workability, so the smaller the content, the better. In order to ensure weather resistance and hot workability, the upper limit of the S content is 0.01%. The content is preferably as small as possible from the viewpoint of weather resistance and hot workability, and the upper limit is preferably 0.005%, more preferably 0.003%, and even more preferably 0.002%. Moreover, since excessive reduction leads to the increase in refining cost, Preferably the minimum of the content shall be 0.0001%. More preferably, the content is 0.0002% in consideration of weather resistance and manufacturing cost.

  Cr is a constituent element of ferritic stainless steel and an essential element for ensuring weather resistance. In order to ensure the weather resistance of the present invention, the lower limit is 12%. The upper limit is 16% from the viewpoint of economy compared with SUS430LX. Considering weather resistance and Sn addition amount, it is preferably 13 to 15%.

  N, like C, deteriorates weather resistance, so the lower the content, the better. Therefore, the upper limit is made 0.03%. From the viewpoint of weather resistance, the lower the content, the better. The upper limit is preferably 0.02%, more preferably 0.012%. Moreover, since excessive reduction leads to the increase in refining cost, Preferably a minimum is made into 0.001%. More preferably, the content is 0.005% in consideration of weather resistance and manufacturing cost.

  Nb is an essential element for improving surface gloss in addition to improving weather resistance in the trace amount Sn-added steel of the present invention. The above effect is manifested from 0.05% or more. However, excessive addition raises the recrystallization temperature of the steel and conversely causes a reduction in surface gloss. Therefore, the upper limit is made 0.3%. Preferably, considering the weather resistance, surface gloss and manufacturability, the content is made 0.1 to 0.2%.

  Ti is an essential element for improving weather resistance in addition to the action as a stabilizing element for fixing C and N. The above effect is manifested from 0.03%. However, excessive addition leads to a decrease in surface gloss due to the haze caused by inclusions and Ti concentration in the oxide film. Therefore, the upper limit is made 0.15%. Preferably, considering the weather resistance, surface gloss and manufacturability, the content is made 0.05 to 0.1%.

  Since Al is an element effective as a deoxidizing element, the lower limit of its content was set to 0.005%. However, excessive addition causes deterioration of workability, toughness and weldability, so the upper limit of the Al content is set to 0.5%. From the viewpoint of workability, toughness and weldability, the lower the content, the better. The upper limit is preferably 0.1%, more preferably 0.05%, and even more preferably 0.03%. In consideration of the refining cost, the lower limit of the content is more preferably 0.01%.

  Sn is an indispensable element for ensuring the target weather resistance of the present invention without resorting to alloying of Cr and Mo and addition of rare elements such as Ni and Co. In order to obtain the target weather resistance of the present invention, the lower limit of the Sn content was set to 0.01%. In order to further ensure weather resistance, it is preferably 0.05% or more, more preferably 0.1% or more. However, excessive addition leads to a decrease in surface gloss and manufacturability, and the effect of improving weather resistance is saturated. Therefore, the upper limit was made 1.0%. In consideration of weather resistance and surface gloss, the upper limit of the content is 0.5% or less, more preferably 0.3%, and still more preferably 0.2%.

  Nb and Ti are added in the above-described ranges, and the addition amount satisfies 1 ≦ Nb / Ti ≦ 3.5 in order to obtain the target weather resistance and surface gloss of the present invention. In the case of Nb / Ti <1, the surface gloss due to Ti inclusions and Ti oxides is reduced. On the other hand, in the case of 3.5 <Nb / Ti, the surface gloss is reduced due to internal oxidation or grain boundary oxidation due to an increase in hot rolling heating temperature and annealing temperature. A more preferable range is 1.5 ≦ Nb / Ti ≦ 3 in consideration of the target weather resistance and surface gloss of the present invention.

  Ni, Cu, Mo, V, Zr, and Co are elements that improve weather resistance due to a synergistic effect with Sn, and may be added as necessary. When added, the effect is 0.01% or more, preferably 0.02% or more. More preferably, it is made 0.05% or more at which the effect expression becomes remarkable. However, if it exceeds 0.5%, the material cost increases and the surface gloss decreases, so the upper limit of each content is set to 0.5%. Since these elements are rare, when added, the preferable range of Ni and Cu is 0.1 to 0.4%, and the preferable range of Mo is 0.1 to 0.3%. A preferable range of V, Zr, and Co is 0.02 to 0.3%.

  Mg forms Mg oxide with Al in molten steel and acts as a deoxidizer, and also acts as a crystallization nucleus of TiN. TiN becomes a solidification nucleus of the ferrite phase in the solidification process, and by facilitating crystallization of TiN, the ferrite phase can be finely formed during solidification. By refining the solidified structure, surface defects caused by coarse solidified structure such as ridging and roping of the product can be prevented, and it may be added as necessary to improve workability. When added, the content is made 0.0001% or more to express these effects. However, if it exceeds 0.005%, manufacturability deteriorates, so the upper limit is made 0.005%. Preferably, considering the manufacturability, the content is made 0.0003 to 0.002%.

  B is an element that improves hot workability and secondary workability. Since addition to ferritic stainless steel is effective, B may be added as necessary. When adding, it is made 0.0003% or more to express these effects. However, excessive addition causes a decrease in elongation, so the upper limit is made 0.005%. Preferably, considering the material cost and workability, the content is made 0.0005 to 0.002%.

  Ca is an element that improves hot workability and steel cleanliness, and may be added as necessary. When adding, it is made 0.0003% or more to express these effects. However, excessive addition leads to a decrease in manufacturability and a decrease in corrosion resistance due to water-soluble inclusions such as CaS, so the upper limit is made 0.005%. Preferably, considering the manufacturability and weather resistance, the content is made 0.0003 to 0.0015%.

[II] The reason for limitation regarding the manufacturing method will be described below.
An example of a production method having the components shown in the above item [I] and necessary for obtaining a weather resistance comparable to that of SUS430LX or SUS430J1L and a surface gloss surpassing that.

A steel slab having the component shown in [I] above is inserted into a hot rolling furnace and heated. The extraction temperature of the slab from the hot-rolling furnace is set to 1080 ° C. or more in order to secure a scale generation amount for removing inclusions on the surface of the slab that induces scabs. The scale generation amount may be 0.2 mm or more in terms of scale thickness. In addition, the upper limit of the extraction temperature is set to 1190 ° C. in order to stabilize the Ti-based carbon sulfide (for example, Ti ₄ C ₂ S ₂ ) by suppressing the generation of MnS and CaS as starting points. In consideration of ensuring the weather resistance and surface gloss as the object of the present invention, the extraction temperature is preferably 1140 to 1180 ° C.

  The reason for setting the winding temperature after hot rolling to 500 ° C. or more is to suppress surface flaws during winding. When the coiling temperature is less than 500 ° C., the hot-rolled steel strip causes poor shape of the hot-rolled steel strip, and induces surface flaws when the coil is unfolded or passed. The reason why the coiling temperature is set to 700 ° C. or lower is to suppress the growth of internal oxides and grain boundary oxidation that cause a reduction in gloss. If the temperature exceeds 700 ° C., precipitates containing Ti and P are likely to precipitate, which may lead to a decrease in weather resistance. In consideration of securing the surface gloss and weather resistance which are the objects of the present invention, the winding temperature is preferably 550 to 650 ° C.

After winding by hot rolling, cold rolling is performed. At this time, hot-rolled sheet annealing may be performed before cold rolling. Further, the cold rolling may be performed once or twice or more. However, when performing cold rolling twice or more, intermediate annealing is performed between each cold rolling.
When hot-rolled sheet annealing is performed, the annealing temperature is preferably set to 1050 ° C. or lower in order to suppress the growth of internal oxides and grain boundary oxidation that cause a decrease in gloss. The lower limit of the annealing temperature is preferably the steel recrystallization temperature (about 850 ° C.). Here, the recrystallization temperature is a temperature at which new crystal grains having no distortion are formed from a rolled processed structure.
The same temperature range is preferable when performing the intermediate annealing at the time of cold rolling.

  The conditions for cold rolling are not particularly limited. The finish annealing after cold rolling is preferably 980 ° C. or lower in consideration of surface gloss. As described above, the lower the annealing temperature, the more the internal oxidation and grain boundary oxidation are suppressed, which is advantageous for improving the surface gloss. For this reason, the lower limit is preferably set to 850 ° C. which is the recrystallization temperature. The pickling method is not particularly specified, and there is no problem even if it is carried out by a method commonly used in industry. For example, there are alkaline salt bath immersion + electrolytic pickling + nitric hydrofluoric acid immersion, alkaline salt bath immersion + electrolytic pickling, and the electrolytic pickling may be performed by neutral salt electrolysis or nitric acid electrolysis.

  Examples of the present invention will be described below.

The ferritic stainless steel having components shown in Table 1 were melted, subjected to hot rolling at extraction temperature 1 0 50-1220 ° C., hot rolled sheet thickness 4.0~6.0mm at coiling temperature four hundred eighty to seven hundred and fifty ° C. A steel plate was used. The hot-rolled steel sheet was subjected to hot-rolled sheet annealing or omitted, and cold-rolled steel sheet having a thickness of 0.4 to 1.0 mm was manufactured by performing cold rolling twice or twice with intermediate annealing. Each of the obtained cold-rolled steel sheets is subjected to finish annealing at a temperature of 870 to 1020 ° C. at which recrystallization is completed, and subjected to regular pickling treatment, and the surface specification is No. stipulated in JIS G 4307. It was set as 2B goods. The common pickling treatment may be, for example, a neutral salt electrolysis (50 ° C., Na ₂ SO ₄ ) treatment after immersion in an alkali salt bath (430 ° C.).
The components of the steel were also carried out in the range specified in the present invention and other cases. The manufacturing conditions were the same as those defined in the present invention and other conditions. SUS430LX (17% Cr-0.3% Ti) was used as a comparative steel.

  The surface glossiness was determined by measuring the glossiness 45 ° Gloss value (Gs45 °) defined in JIS Z 8741 in the rolling direction (0 °) and the perpendicular direction (90 °) of the steel sheet. The weather resistance is No. Steel sheet samples (plate thickness x 100 mm square) on the 2B surface and # 600 polished surface were prepared and immersed in a 168 hr in a 0.5% NaCl aqueous solution at 80 ° C. and a salt spray test in accordance with JIS Z 2371 (168 hr continuous spray test) It was evaluated by. Compared with SUS430LX, the degree of rusting is “◎” when it is good without stains or spots, “◯” when it is comparable and inferior, ". Table 2 summarizes the test results.

  From Table 2, test numbers 1 to 21 are ferritic stainless steels that satisfy all of the components defined in the present invention. These steel sheets have a higher surface glossiness (Glossiness at Ga45 ° (0 °) of SUS430LX = 610 or more, Glossiness at Ga45 ° (90 °) = 520 or more) than SUS430LX, and resistance to SUS430LX. It can also be seen that the fertility is good enough to exceed or exceed that of SUS430LX.

Test Nos. 8, 9, 15, and 16 have components specified by the present invention, but deviate from the production method (extraction temperature, winding temperature , finish annealing temperature ) according to the present invention. These steel sheets satisfied the target weather resistance and glossiness according to the present invention, but the glossiness was slightly inferior to those of the other examples of the present invention.

  Although test numbers 22-29 are implementing the manufacturing method prescribed | regulated by this invention, it remove | deviates from the component of this invention. These steel sheets could not have both the surface gloss and weather resistance targeted by the present invention.

  1 and 2 show the relationship between the Nb / Ti amount and the surface glossiness in the examples. In order to obtain 610 or more at Gs45 ° (0 °) equivalent to SUS430LX, which is the target surface gloss of the present invention, and 520 or more at Gs45 ° (90 °), the component range specified in the present invention is 1 ≦ Nb It is important that /Ti≦3.5.

  According to the present invention, the surface gloss and the weather resistance are excellent, which is excellent in economic efficiency without causing an increase in alloy costs and manufacturing costs, has a weather resistance comparable to SUS430LX and SUS430J1L, and has dramatically improved the surface gloss. It is possible to obtain an alloy-saving ferritic stainless steel with excellent resistance.

Claims (6)

In mass%
C: 0.001 to 0.03%,
Si: 0.01 to 1.0%,
Mn: 0.01 to 1.5%,
P: 0.005 to 0.05%,
S: 0.0001 to 0.01%,
Cr: 12-16%,
N: 0.001 to 0.03%,
Nb: 0.05 to less than 0.3%,
Ti: 0.03 to less than 0.15%,
Al: 0.005 to 0.5%,
Sn: 0.01-1.0%,
The balance consists of Fe and inevitable impurities,
A ferritic stainless steel sheet excellent in surface gloss and weather resistance, characterized by satisfying a relationship of 1.5 ≦ Nb / Ti ≦ 3 . The stainless steel plate is further in mass%,
Ni: 0.01 to 0.5%,
Cu: 0.01 to 0.5%,
Mo: 0.01 to 0.5%,
V: 0.01-0.5%
Zr: 0.01 to 0.5%,
Co: 0.01 to 0.5%
Mg: 0.0001 to 0.005%,
B: 0.0003 to 0.005%,
Ca: 0.0003 to 0.005%
The ferritic stainless steel sheet having excellent surface gloss and weather resistance according to claim 1, wherein the ferritic stainless steel sheet is excellent in surface gloss and weather resistance.   A slab of stainless steel having the steel component according to claim 1 or 2 is heated, extracted from a heating furnace at an extraction temperature of 1080 to 1190 ° C, hot-rolled, and wound at a winding temperature of 500 to 700 ° C. A method for producing a ferritic stainless steel sheet having excellent surface gloss and weather resistance.   The ferritic stainless steel sheet having excellent surface gloss and weather resistance according to claim 3, wherein after the hot rolling is wound, cold rolling is performed, and then finish annealing is performed at 850 to 980 ° C. Manufacturing method.   4. The surface gloss and weather resistance according to claim 3, wherein after the hot rolling is wound, cold rolling is performed twice or more with intermediate annealing, and then finish annealing is performed at 850 to 980 ° C. 5. Of ferritic stainless steel sheet with excellent properties.   6. The surface gloss and resistance to heat resistance according to claim 4, wherein the hot-rolled sheet annealing is performed at a recrystallization temperature of 1050 ° C. or less after the hot rolling and before cold rolling. A method for producing ferritic stainless steel sheets with excellent inertia.

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