JPH0673696B2 - Method for producing stainless steel sheet with excellent surface quality - Google Patents
Method for producing stainless steel sheet with excellent surface qualityInfo
- Publication number
- JPH0673696B2 JPH0673696B2 JP1159734A JP15973489A JPH0673696B2 JP H0673696 B2 JPH0673696 B2 JP H0673696B2 JP 1159734 A JP1159734 A JP 1159734A JP 15973489 A JP15973489 A JP 15973489A JP H0673696 B2 JPH0673696 B2 JP H0673696B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- steel sheet
- producing
- surface quality
- continuous casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 16
- 239000010935 stainless steel Substances 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000009749 continuous casting Methods 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 5
- 239000006061 abrasive grain Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 18
- 238000005096 rolling process Methods 0.000 description 8
- 238000005554 pickling Methods 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000012733 comparative method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は表面品質に優れたステンレス薄板の製造方法に
係り、特に鋳片と鋳型内壁面の間に相対速度差のない、
いわゆる同期式連続鋳造プロセスによって鋳造した製品
厚さに近い厚さの鋳片を冷間圧延して、ステンレス鋼薄
板を製造する方法に関するものである。The present invention relates to a method for producing a stainless steel sheet having excellent surface quality, and in particular, there is no relative speed difference between a slab and a mold inner wall surface.
The present invention relates to a method for producing a stainless steel sheet by cold rolling a slab having a thickness close to the product thickness cast by a so-called synchronous continuous casting process.
連続鋳造法を用いてステンレス鋼薄板を製造する従来の
方法は、鋳型を鋳造方向に振動させながら厚さ100mm以
上の鋳片に鋳造し、得られた鋳片の表面手入れを行い、
加熱炉において1100℃以上に加熱した後、粗圧延機およ
び仕上圧延機列からなるホットストリップミルにより熱
間圧延を施して厚さ数mmのホットストリップとし、さら
に必要に応じて焼鈍した後、デスケーリングし冷間圧延
して最終焼鈍を行うものであった。A conventional method for producing a stainless steel thin plate using a continuous casting method is to cast a cast piece having a thickness of 100 mm or more while vibrating the mold in the casting direction, and perform surface maintenance of the obtained cast piece,
After heating to 1100 ° C or higher in a heating furnace, hot rolling is performed by a hot strip mill consisting of a rough rolling mill and a finishing rolling mill row to form a hot strip having a thickness of several mm, and further, if necessary, annealed, The final annealing was performed by scaling and cold rolling.
このように従来のプロセスにおいては、厚さ100mm以上
の鋳片を熱間圧延するために、長大なホットストリップ
ミルを必要とし、鋳片の加熱と圧延のために多大なエネ
ルギーを使用するという問題があった。Thus, in the conventional process, in order to hot-roll a slab with a thickness of 100 mm or more, a long hot strip mill is required, and a problem of using a large amount of energy for heating and rolling the slab was there.
この問題に対して、ホットストリップと同等かあるいは
それに近い厚さの鋳片を連続鋳造によって製造するプロ
セスの研究が進められている。たとえば、「鉄と鋼」′
85−A197〜'85−A256に特集された論文に紹介されてい
るような、双ロール法、双ベルト法等、鋳片と鋳型内壁
面間に相対速度差のない同期式連続鋳造プロセスであ
る。また、特開昭62−21443号公報には双ロール法を用
いた薄板連続鋳造装置が開示されている。For this problem, research on a process for producing a slab having a thickness equal to or close to that of a hot strip by continuous casting is under way. For example, "iron and steel"
Synchronous continuous casting process with no relative velocity difference between the slab and the mold inner wall surface, such as twin roll method, twin belt method, etc., as introduced in the paper featured in 85-A197 to '85 -A256. . Further, JP-A-62-21443 discloses a thin plate continuous casting apparatus using a twin roll method.
しかし、これら同期式連続鋳造プロセスを経てステンレ
ス鋼薄板製品を製造するには、未解決の課題が残されて
いた。However, there have been unsolved problems in producing stainless steel sheet products through these synchronous continuous casting processes.
上記双ロール法、双ベルト法等の連続鋳造によってステ
ンレス鋼薄板を製造する場合従来の鋳造から製品迄の工
程が大幅に省略、短縮されるためステンレス薄板の表面
品質に以下に述べる如く問題が生じた。In the case of producing a stainless steel thin plate by continuous casting such as the twin roll method, twin belt method, etc., the steps from the conventional casting to the product are largely omitted and shortened, so that the surface quality of the stainless thin sheet has a problem as described below. It was
すなわち本発明者らは、代表的なオーステナイト系ステ
ンレス鋼であるSUS304の溶鋼を、内部水冷方式の双オー
ル連続鋳造機により鋳造して板厚１〜5mmの薄帯状鋳片
とし、これを冷間圧延（圧下率約50〜80％）した後、一
部は焼鈍および酸洗して2B製品とし、一部は光輝焼鈍し
てBA製品とした。また、厚さ100mm以上の連続鋳造スラ
ブを熱間圧延した後、冷間圧延して2B製品およびBA製品
を製造した。これらの製品の表面品質性状を詳細に比較
した結果、双ロール連続鋳造機を用いたときの製品に
は、光沢むらが認められた。That is, the present inventors cast a molten steel of SUS304, which is a typical austenitic stainless steel, into a thin strip-shaped slab with a plate thickness of 1 to 5 mm by casting with a twin-all continuous casting machine of an internal water cooling system, and cold casting this. After rolling (reduction of about 50 to 80%), some were annealed and pickled to give 2B products, and some were bright annealed to BA products. Further, a continuously cast slab having a thickness of 100 mm or more was hot-rolled and then cold-rolled to manufacture 2B products and BA products. As a result of a detailed comparison of the surface quality properties of these products, uneven gloss was observed in the products when the twin roll continuous casting machine was used.
この光沢むらは冷間圧延前の酸洗で材料表面に粒界腐食
溝が発生し、しかも冷間圧延前の材料表面の結晶粒の大
きさが不均一に分布していることに起因して生じている
ことがわかった。This uneven gloss is due to the occurrence of intergranular corrosion grooves on the material surface during pickling before cold rolling, and the uneven distribution of crystal grain sizes on the material surface before cold rolling. It turned out that it was happening.
本発明は、ステンレス薄板表面の表面欠陥である上記光
沢むらを軽減あるいは防止するステンレス薄板の製造方
法を提供することを目的とする。An object of the present invention is to provide a method for producing a stainless steel thin plate, which reduces or prevents the above-mentioned uneven glossiness which is a surface defect on the surface of the stainless steel thin plate.
上記課題は本発明によればステンレス鋼を鋳型壁面が鋳
片に同期して移動する連続鋳造機により薄帯状鋳片に鋳
造し、該薄帯状鋳片を酸洗によるデスケーリングし、冷
間圧延し更に大気焼鈍・酸洗あるいは単に光輝焼鈍を行
う工程を含むステンレス薄板の製造方法において、 前記冷間圧延工程の前処理として前記酸洗によるデスケ
ーリングの代わりに研摩砥粒研掃によるデスケーリング
を行うことを特徴とする表面品質に優れたステンレス薄
板の製造方法によって解決される。According to the present invention, according to the present invention, stainless steel is cast into a strip-shaped slab by a continuous casting machine in which the mold wall surface moves in synchronization with the slab, and the strip-shaped slab is descaled by pickling and cold-rolled. In a method for producing a stainless steel thin plate including a step of further performing atmospheric annealing / pickling or simply bright annealing, descaling by polishing abrasive grain polishing instead of descaling by pickling is performed as a pretreatment for the cold rolling step. This is solved by a method for producing a stainless thin plate having excellent surface quality, which is characterized by carrying out.
本発明によれば冷間圧延工程の前処理として酸洗による
デスケーリングを行わず、研摩砥粒研掃によるデスケー
リングを行うため、従来光沢むらとなっていたCr炭化物
析出に起因する粒界腐食溝が発生せずしかも、スケール
除去強化により鋳片表面の凹凸がより均一化され表面性
状の良化に寄与する。According to the present invention, descaling by pickling is not performed as a pretreatment for the cold rolling process, and descaling is performed by polishing with abrasive grains. Grooves do not occur, and the scale removal enhancement strengthens the unevenness of the surface of the slab more uniformly, contributing to the improvement of the surface quality.
本発明法はオーステナイト系ステンレス鋼のほか、クロ
ム系ステンレス鋼にも有効である。また本発明で用いる
連続鋳造法としては双ロール法が最も好ましいが、双ベ
ルト法、内部リング法等にも用いられる。The method of the present invention is effective not only for austenitic stainless steel but also for chromium stainless steel. The twin-roll method is most preferable as the continuous casting method used in the present invention, but it is also used for the twin-belt method, the inner ring method and the like.
本発明に係る研摩砥粒研掃によるデスケーリング方法と
しては液体ホーニング、ベルト研削、グリット投射、砥
粒入りブラシ、ベルト研削等が用いられる。この研掃で
は約10〜30μｍの深さで研掃されるのが好ましい。Liquid honing, belt grinding, grit projection, brush with abrasive particles, belt grinding and the like are used as the descaling method by polishing abrasive grain cleaning according to the present invention. In this scouring, the scouring is preferably performed to a depth of about 10 to 30 μm.
SUS304及びSUS430の各ステンレス鋼を内部水冷方式の垂
直型双ロール連続鋳造機により薄帯状鋳片に鋳造した。
鋳片厚さ、デリケーリング方法、研掃深さ（μｍ）、粒
界腐食状況、冷間圧延後の板厚（mm）、最終焼鈍法を変
化させて製造したステンレス薄板製品の表面光沢を第１
表に示した。Stainless steels of SUS304 and SUS430 were cast into thin strips by an internal water-cooled vertical twin roll continuous casting machine.
The surface gloss of stainless steel sheet products manufactured by changing the thickness of slab, delicate method, polishing depth (μm), intergranular corrosion condition, plate thickness after cold rolling (mm), and final annealing method 1
Shown in the table.
本実施例では凝固開始から1200℃迄の冷却速度は鋳片が
双ロールを出た直後、ロール冷却や水スプレー冷却によ
り300〜1000゜／秒の冷却速度で行なった。In this embodiment, the cooling rate from the start of solidification to 1200 ° C. was 300 to 1000 ° / sec by the roll cooling or the water spray cooling immediately after the slab left the twin rolls.
第１表によれば本発明法により得られたNo.1〜No.4のSU
S304及びNo.5のSUS430共全て表面光沢が良好で光沢むら
が認められなかった。According to Table 1, No. 1 to No. 4 SUs obtained by the method of the present invention
Both S304 and No. 5 SUS430 had good surface gloss and no uneven gloss was observed.
これに対して比較法（従来法）のNo.6SUS304、No.7SUS4
30では酸洗により粒界腐食溝が発生して光沢むらが発生
した。なお光沢むらは肉眼で観察したものである。On the other hand, comparative method (conventional method) No.6SUS304, No.7SUS4
In No. 30, pickling resulted in intergranular corrosion grooves and uneven gloss. The gloss unevenness was observed with the naked eye.
〔発明の効果〕 以上説明した様に本発明によれば冷間圧延前のデスケー
リングを粒界腐食溝の発生しない方法で行なっているた
め冷間圧延後に光沢むらの発生がなく良好な表面品質の
ステンレス薄板を得ることが出来た。 [Effect of the Invention] As described above, according to the present invention, descaling before cold rolling is carried out by a method that does not cause intergranular corrosion grooves, so that uneven gloss does not occur after cold rolling and good surface quality is obtained. It was possible to obtain the stainless thin plate of.
Claims (1)
移動する連続鋳造機により薄帯状鋳片に鋳造し、該薄帯
状鋳片を冷間圧延し更に大気焼鈍・酸洗あるいは単に光
揮焼鈍を行う工程を含むステンレス薄板の製造方法にお
いて、 前記冷間圧延工程の前処理として研摩砥粒研掃によるデ
スケーリングを行うことを特徴とする表面品質に優れた
ステンレス薄板の製造方法。Claims: 1. Stainless steel is cast into a strip-shaped cast piece by a continuous casting machine in which the wall surface of the mold moves in synchronization with the cast piece, and the strip-shaped cast piece is cold-rolled and further annealed in air, pickled or simply exposed to light. A method for producing a stainless steel sheet having excellent surface quality, which comprises performing descaling by polishing abrasive grain polishing as a pretreatment of the cold rolling step in the method for producing a stainless steel sheet including a step of performing a volatilization annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159734A JPH0673696B2 (en) | 1989-06-23 | 1989-06-23 | Method for producing stainless steel sheet with excellent surface quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159734A JPH0673696B2 (en) | 1989-06-23 | 1989-06-23 | Method for producing stainless steel sheet with excellent surface quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327811A JPH0327811A (en) | 1991-02-06 |
| JPH0673696B2 true JPH0673696B2 (en) | 1994-09-21 |
Family
ID=15700107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1159734A Expired - Fee Related JPH0673696B2 (en) | 1989-06-23 | 1989-06-23 | Method for producing stainless steel sheet with excellent surface quality |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0673696B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4423664A1 (en) * | 1994-07-07 | 1996-05-15 | Bwg Bergwerk Walzwerk | Process for producing cold-rolled steel strips from stainless steel and metal strips, in particular from titanium alloys |
| FI954819A (en) * | 1994-10-14 | 1996-04-15 | Mannesmann Ag | Process and apparatus for producing high-grade cold-rolled strip iron of hot-rolled coarse strip iron |
| WO1997011798A1 (en) * | 1995-09-26 | 1997-04-03 | Hermetik Hydraulik Ab | Process for cold descaling |
| JP3748349B2 (en) | 1999-08-26 | 2006-02-22 | 富士写真フイルム株式会社 | Master for lithographic printing plate |
| KR100812065B1 (en) * | 2006-11-23 | 2008-03-07 | 주식회사 포스코 | Improvement method of surface roughness of hot rolled stainless steel coils |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61219448A (en) * | 1985-03-26 | 1986-09-29 | Mitsubishi Heavy Ind Ltd | Continuous casting device for thin sheet |
| JPS62176649A (en) * | 1986-01-28 | 1987-08-03 | Nippon Yakin Kogyo Co Ltd | Production for ferite stainless steel thin hoop having no roping |
-
1989
- 1989-06-23 JP JP1159734A patent/JPH0673696B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0327811A (en) | 1991-02-06 |
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