JP2849274B2 - Method for removing oxide film from cold-rolled steel sheet - Google Patents
Method for removing oxide film from cold-rolled steel sheetInfo
- Publication number
- JP2849274B2 JP2849274B2 JP4126056A JP12605692A JP2849274B2 JP 2849274 B2 JP2849274 B2 JP 2849274B2 JP 4126056 A JP4126056 A JP 4126056A JP 12605692 A JP12605692 A JP 12605692A JP 2849274 B2 JP2849274 B2 JP 2849274B2
- Authority
- JP
- Japan
- Prior art keywords
- oxide film
- steel sheet
- rolled steel
- cold
- removing oxide
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning In General (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、連続焼鈍された高張力
冷延鋼板の酸化膜除去方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of removing an oxide film from a continuously annealed high-tensile cold-rolled steel sheet.
【0002】[0002]
【従来の技術】従来、連続焼鈍では炉内を不活性ガスと
することで鋼帯の酸化を防止している。また、特開昭5
4−29821号公報のように大気雰囲気中にて過時効
処理を施す場合は、鋼帯表面に生成した酸化膜を、酸洗
もしくはショットブラスト等の機械的方法で除去する方
法が知られている。2. Description of the Related Art Conventionally, in continuous annealing, oxidation of a steel strip is prevented by using an inert gas in a furnace. In addition, Japanese Unexamined Patent Publication No.
In the case of performing overaging treatment in an air atmosphere as in Japanese Patent Application Laid-Open No. 4-29821, a method of removing an oxide film formed on the surface of a steel strip by a mechanical method such as pickling or shot blast is known. .
【0003】[0003]
【発明が解決しようとする課題】しかし、近年、地球環
境問題により、自動車の低公害、高燃費化が叫ばれてお
り、自動車の軽量化は大きなテーマとなっている。この
ような状況の中で高張力鋼板のニーズが高まっており、
自動車用鋼板の主流になりつつある。ところがこの高張
力鋼板は、Siを0.2重量%以上含有させた場合は炉
内を不活性ガスにしてもSiが微量の0と結合し酸化膜
を形成してしまい、この場合の酸化膜は非常に強固で通
常の酸洗又は機械的方法のみでは除去しきれないという
問題があった。However, in recent years, due to global environmental problems, low pollution and high fuel efficiency of automobiles have been called for, and reduction of automobile weight has become a major theme. Under these circumstances, the need for high-strength steel sheets is increasing,
Automotive steel sheets are becoming mainstream. However, in the high-strength steel sheet, when Si is contained in an amount of 0.2% by weight or more, even if the inside of the furnace is an inert gas, Si is combined with a small amount of 0 to form an oxide film. Has a problem that it is very strong and cannot be completely removed only by ordinary pickling or a mechanical method.
【0004】[0004]
【課題を解決するための手段】本発明は前記課題を解決
するために 不活性ガス雰囲気中にて連続焼鈍され、S
iを0.2重量%以上含有する高張力冷延鋼板に対し
て、第1段階としてブラシ研削を行い、続いて第2段階
として塩酸酸洗を行い、表層の酸化膜を除去することを
特徴とする冷延鋼板の酸化膜除去方法を提供するもので
ある。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides continuous annealing in an inert gas atmosphere.
A high-strength cold-rolled steel sheet containing 0.2% by weight or more of i is subjected to brush grinding as a first step, followed by hydrochloric acid pickling as a second step to remove a surface oxide film. And a method for removing an oxide film from a cold-rolled steel sheet.
【0005】[0005]
【作用】図1は本発明における酸化膜の除去機構を示す
鋼板の厚さ方向断面説明図である。図1において、
(a)は酸化膜の生成状態を示す説明図、(b)は第1
段階のブラシ研削を行った状態を示す説明図、(c)は
第2段階の塩酸酸洗を行った状態を示す説明図で、1は
連続焼鈍された高張力冷延鋼板、2は連続焼鈍により生
成した酸化膜、3は塩酸である。FIG. 1 is an explanatory cross-sectional view of a steel sheet in a thickness direction showing an oxide film removing mechanism according to the present invention. In FIG.
(A) is an explanatory view showing a state of formation of an oxide film, and (b) is a first view.
Explanatory drawing showing a state in which brush grinding is performed in a second stage, (c) is an explanatory diagram showing a state in which hydrochloric acid pickling is performed in a second stage, and 1 is a continuously annealed high-tensile cold-rolled steel sheet and 2 is a continuous annealing. The oxide film 3 formed by the above is hydrochloric acid.
【0006】本発明によれば、図1に示すようにSiの
酸化膜をまず第1段階としてブラシ研削し、Siの酸化
膜の1部を削り落としてFe層を露出させ(図1
(b))、続いて第2段階として塩酸酸洗することによ
り、酸化膜は塩酸に溶解し難いが、露出したFe層から
酸化膜とFe層との界面のFe層を溶解させることがで
きるので、酸洗を進行させることで効率よくSiの酸化
膜をFe層より剥離して除去できる(図1(c))。According to the present invention, as shown in FIG. 1, the Si oxide film is firstly brush-ground as a first step, and a part of the Si oxide film is removed to expose the Fe layer (FIG. 1).
(B)) Subsequently, by performing hydrochloric acid pickling as the second step, the oxide film is hardly dissolved in hydrochloric acid, but the Fe layer at the interface between the oxide film and the Fe layer can be dissolved from the exposed Fe layer. Therefore, by proceeding the pickling, the Si oxide film can be efficiently peeled off and removed from the Fe layer (FIG. 1C).
【0007】酸洗用の酸として塩酸を用いると、例えば
硫酸を用いる場合に比し、迅速に酸化膜を除去すること
ができ、酸洗用塩酸としては、濃度5〜10重量%、温
度50〜70℃のものが好適に用いられる。第1段階に
用いられるブラシとしては、砥粒入りナイロンブラシが
好適に用いられる。When hydrochloric acid is used as an acid for pickling, an oxide film can be removed more quickly than when, for example, sulfuric acid is used. The concentration of hydrochloric acid for pickling is 5 to 10% by weight and the temperature is 50%. Those having a temperature of -70 ° C are preferably used. As the brush used in the first step, a nylon brush containing abrasive grains is preferably used.
【0008】なお、本発明は、過時効処理の有無に係ら
ず実施することができる。[0008] The present invention can be implemented with or without overaging.
【0009】[0009]
【実施例】図2は、本発明の一実施例における装置の配
列を示す概要図である。焼鈍されたSi含有量0.2重
量%以上の高張力冷延鋼板1を、不活性ガスを雰囲気と
する焼鈍炉5を出たのちロール4により搬送し、まず第
1段階としてブラシ研削装置6に入れ研削ブラシ7で表
層の酸化膜の一部を削り落した。続いて第2段階として
酸洗装置8に入れ、濃度10g/リットル、温度60℃
の塩酸により10秒酸洗した。いずれの鋼板においても
酸化膜を迅速かつ安全に除去することができた。FIG. 2 is a schematic diagram showing an arrangement of the apparatus according to an embodiment of the present invention. The annealed high-strength cold-rolled steel sheet 1 having a Si content of 0.2% by weight or more is conveyed by a roll 4 after leaving an annealing furnace 5 in an atmosphere of an inert gas. Then, a part of the surface oxide film was cut off with a grinding brush 7. Subsequently, as a second step, the solution was put into the pickling apparatus 8, and the concentration was 10 g / liter and the temperature was 60 ° C.
Was pickled with hydrochloric acid for 10 seconds. The oxide film could be quickly and safely removed from any of the steel sheets.
【0010】[0010]
【発明の効果】本発明により、連続焼鈍高張力冷延鋼板
のSiによる酸化膜を効率よく除去できるようになっ
た。また、酸洗効率の向上により、塗装性、化学処理性
が向上しただけでなく、生産効率も向上し、コスト的に
も安価である。According to the present invention, it has become possible to efficiently remove an oxide film due to Si of a continuous-annealed high-tensile cold-rolled steel sheet. Further, the improvement of the pickling efficiency not only improves the coating property and the chemical treatment property, but also improves the production efficiency and is inexpensive.
【図1】本発明における酸化膜の除去機構を示す鋼板の
厚さ方向断面説明図である。FIG. 1 is an explanatory cross-sectional view of a steel sheet in a thickness direction showing an oxide film removing mechanism according to the present invention.
【図2】本発明の一実施例における装置の配列を示す概
要図である。FIG. 2 is a schematic diagram showing an arrangement of devices according to an embodiment of the present invention.
1 鋼板 2 酸化膜 3 塩酸 4 ロール 5 焼鈍炉 6 ブラシ研削
装置 7 研削ブラシ 8 酸洗装置DESCRIPTION OF SYMBOLS 1 Steel plate 2 Oxide film 3 Hydrochloric acid 4 Roll 5 Annealing furnace 6 Brush grinding device 7 Grinding brush 8 Pickling device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黒川 重男 千葉市中央区川崎町1番地 川崎製鉄株 式会社 千葉製鉄所内 (72)発明者 谷口 茂樹 千葉市中央区川崎町1番地 川崎製鉄株 式会社 千葉製鉄所内 (58)調査した分野(Int.Cl.6,DB名) B21B 45/06 B08B 7/04 C22C 38/00 C23G 1/08──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Kurokawa 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Works Co., Ltd. (72) Inventor Shigeki Taniguchi 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Corporation Inside Chiba Works (58) Field surveyed (Int. Cl. 6 , DB name) B21B 45/06 B08B 7/04 C22C 38/00 C23G 1/08
Claims (1)
Siを0.2重量%以上含有する高張力冷延鋼板に対し
て、第1段階としてブラシ研削を行い、続いて第2段階
として塩酸酸洗を行い、表層の酸化膜を除去することを
特徴とする冷延鋼板の酸化膜除去方法。(1) continuous annealing in an inert gas atmosphere;
A high-strength cold-rolled steel sheet containing 0.2% by weight or more of Si is subjected to brush grinding as a first step, followed by hydrochloric acid pickling as a second step to remove a surface oxide film. Method for removing oxide film from cold rolled steel sheet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4126056A JP2849274B2 (en) | 1992-05-19 | 1992-05-19 | Method for removing oxide film from cold-rolled steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4126056A JP2849274B2 (en) | 1992-05-19 | 1992-05-19 | Method for removing oxide film from cold-rolled steel sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05317949A JPH05317949A (en) | 1993-12-03 |
JP2849274B2 true JP2849274B2 (en) | 1999-01-20 |
Family
ID=14925547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4126056A Expired - Fee Related JP2849274B2 (en) | 1992-05-19 | 1992-05-19 | Method for removing oxide film from cold-rolled steel sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2849274B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200048249A (en) * | 2018-10-29 | 2020-05-08 | 주식회사 포스코 | Pickling apparatus of advanced high strength steel |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5510118B2 (en) * | 2010-06-28 | 2014-06-04 | Jfeスチール株式会社 | Method for producing high-tensile steel plate excellent in chemical conversion treatment and production apparatus therefor |
JP5835547B2 (en) * | 2011-03-10 | 2015-12-24 | Jfeスチール株式会社 | Method for producing Si-containing cold-rolled steel sheet |
JP5919920B2 (en) * | 2011-03-28 | 2016-05-18 | Jfeスチール株式会社 | Method and apparatus for producing Si-containing cold-rolled steel sheet |
CN104053820B (en) * | 2012-01-18 | 2016-03-02 | 杰富意钢铁株式会社 | Prevent the method for the xanthochromia of the surface of steel plate after pickling |
JP5821874B2 (en) * | 2013-02-28 | 2015-11-24 | Jfeスチール株式会社 | Manufacturing method of high-Si cold-rolled steel sheet |
-
1992
- 1992-05-19 JP JP4126056A patent/JP2849274B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200048249A (en) * | 2018-10-29 | 2020-05-08 | 주식회사 포스코 | Pickling apparatus of advanced high strength steel |
Also Published As
Publication number | Publication date |
---|---|
JPH05317949A (en) | 1993-12-03 |
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