JPH01259153A - Manufacture of hot dipped steel sheet - Google Patents
Manufacture of hot dipped steel sheetInfo
- Publication number
- JPH01259153A JPH01259153A JP8538688A JP8538688A JPH01259153A JP H01259153 A JPH01259153 A JP H01259153A JP 8538688 A JP8538688 A JP 8538688A JP 8538688 A JP8538688 A JP 8538688A JP H01259153 A JPH01259153 A JP H01259153A
- Authority
- JP
- Japan
- Prior art keywords
- hot
- hot dipping
- steel sheet
- metal
- plating
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000012298 atmosphere Substances 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 3
- 230000001590 oxidative effect Effects 0.000 claims description 19
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 abstract description 30
- 238000007598 dipping method Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- 238000004381 surface treatment Methods 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002803 maceration Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、耐食性・ＩＩＩＦＩ熱性の優れた溶融金属・
溶融合金めっき鋼板の製造法に関するもので、？５通２
１１、あるいは特にステンレス鋼板、高張力鋼板、等の
勤溶融めっき性鋼板を下地鋼板に用いる場合に有用な溶
融めっき鋼板の製造法に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a molten metal with excellent corrosion resistance and IIIF heat resistance.
Is it related to the manufacturing method of hot-melt alloy plated steel sheets? 5 letters 2
11, or particularly relates to a method for producing a hot-dip plated steel plate useful when a hot-dip plateable steel plate such as a stainless steel plate or a high-strength steel plate is used as a base steel plate.
［従来の技術］
以下、本発明をステンレス鋼板、高張力鋼板、等の難め
、つき性鋼板（こ適用する場合を主にして説明する。[Prior Art] The present invention will be described below with reference to the case where it is applied to difficult-to-stick steel plates such as stainless steel plates and high-strength steel plates.
鋼板の連続的な溶融金属めっきは、現在その多くかセン
シマ一方式の連続溶融めっき設備て行なわれている。こ
の方法は、溶融めっきの前処理として無酸化炉での加熱
と還元炉による加熱を行い鋼板の焼銃と鋼板表面の７３
１化・活性化処理を同時に行うものてあり、低コス１へ
て生産性か非常に高いのか特徴である。しかし・なから
、この方ン人によりＡＱ、ＣＩ・、Ｓｉ、Ｍｎなとの易
醇化性元素を多量に僑有する鋼板を溶融めっきしようと
した場合、加熱前処理の初期の段階で鋼板表面に−に記
元素の酸化被膜か生成する。この醇化被膜は、センシマ
一方式のめっき設イイ１１では、引き続く口元炉による
加熱処理過程では除くことかできないため、鋼板は表１
ｎｊに醇化被膜を残したまま溶融金属浴Ｃ：ｌ ＃’ｉ
漬される。これが原因となって、不めフき、密着不良な
どの問題を生じやすいことはよく知られている。Continuous hot-dip metal plating of steel sheets is currently carried out mostly by Sensima type continuous hot-dip plating equipment. This method involves heating in a non-oxidizing furnace and heating in a reducing furnace as pretreatment for hot-dip plating.
It is a device that performs unification and activation processing at the same time, and is characterized by its low cost and extremely high productivity. However, for some reason, when this person attempts to hot-dip a steel plate containing a large amount of easily meltifying elements such as AQ, CI, Si, and Mn, - An oxide film of the listed elements is formed. This maceration film cannot be removed by the subsequent heat treatment process using a mouth furnace in Sensima's one-way plating system II.
Molten metal bath C: l #'i with the liquefied film left on nj
Pickled. It is well known that this tends to cause problems such as smearing and poor adhesion.
そのため、ＡＭ、Ｃｒ、Ｓｉ、Ｍｎなどの易酸化性元素
を多量に含有する鋼板を溶融金属めっきする場合の前処
理法として、溶融めっきの前にあらがしめ鉄を電気めっ
きして溶融めっきを容易に行う方法が特開昭５７−７０
２６８に開示されている。Therefore, as a pretreatment method when hot-dip metal plating is applied to steel sheets containing large amounts of easily oxidizable elements such as AM, Cr, Si, and Mn, hot-dip plating is performed by electroplating roughened iron before hot-dip plating. An easy method is disclosed in Japanese Patent Application Laid-Open No. 57-70.
268.
また、首通鋼の溶融めっきにおいても鋼板にあらかじめ
Ｎｉ、Ｆｅ、Ｇｏなどの微量めっきをして鋼板表面の活
性を高めることにより、溶融めっきを容易にし、かつ耐
食性、めっき密着性などを高める方法が特開昭５７−１
４０８６４ 、５６−３３４６３などに開示されている
。In addition, in the hot-dip plating of Shutsu Steel, the steel plate is pre-plated with a small amount of Ni, Fe, Go, etc. to increase the activity of the steel plate surface, which makes hot-dip plating easier and improves corrosion resistance, plating adhesion, etc. is JP-A-57-1
40864, 56-33463, etc.
従来は以上に述べたような、いわゆる「プレめっき」処
理によって鋼板の溶融めっき性を高めようとする事か提
案されている。しがしながら、この「プレめっき」処理
は溶融めっき鋼板製造のコストアップをまねくことは言
うまでもない。また、Ｃｒ、 ＡＱなどを多く含む鋼板
、すなわち溶融めっきか困難な鋼板はど電気めっきをす
ることもまた困難てあり、通常軟鋼と同じ工程て電気め
っきした場合、めっき密着不良なとの問題か生じやすい
こともまたよく知られている通りである。これを解決す
るには、ストライクめっきといわれる特殊な前処理が必
要であるか、これは通常の連続電気めっき設備ては行な
われていないものである。従ってこのようなめっき設備
を設けることはさらにコストアップをまねくことになる
。Conventionally, it has been proposed to improve the hot-dip coating properties of steel sheets by the so-called "pre-plating" treatment as described above. However, it goes without saying that this "pre-plating" treatment increases the cost of producing hot-dip galvanized steel sheets. In addition, it is difficult to electroplate steel sheets that contain a lot of Cr, AQ, etc., that is, steel sheets that are difficult to hot-dip, and if they are electroplated using the same process as normal mild steel, there may be problems with poor plating adhesion. It is also well known that this phenomenon is easy to occur. To solve this problem, a special pretreatment called strike plating is required, or this is not carried out in ordinary continuous electroplating equipment. Therefore, providing such plating equipment will further increase costs.
不錆鋼板を基板として溶融金属めっきした場合、耐食性
・耐熱性などにずくれた、非常に商品価値の高い製品が
Ｉｊ）られることか期待されるが、これまては、以上の
ような理由からあまり行なわれていなかった。When hot-dip metal plating is applied to a rust-free steel plate as a substrate, it is expected that a product with excellent corrosion resistance, heat resistance, etc. and extremely high commercial value will be produced. It hasn't been done much since then.
［発明が解決しようとする課題］
本発明は、従来のセンシマ一方式のようなＮ２還元とい
う化学的な表面活性化ではめっき密着性向上に限界があ
る事から鋼板全般に適用でき、特に難めつき牲の鋼板に
有用な新規な溶融めっき鋼板の製造法を提供することを
目的としている。[Problems to be Solved by the Invention] The present invention can be applied to steel sheets in general, since there is a limit to improving plating adhesion with chemical surface activation such as N2 reduction, as in the conventional Sensima one-way method, and is particularly applicable to steel sheets that are difficult to solve. The purpose of the present invention is to provide a method for manufacturing a new hot-dip galvanized steel sheet that is useful for sacrificial steel sheets.
［課題を解決するだめの手段］
本発明は前記の目的を達成するために、熱間圧延後の鋼
板を非酸化性雰囲気中に導入して、表面を研削した後、
非酸化性雰囲気中で熱間圧延を行い、圧延て生した新生
面を空気に触れさせることなく溶融金属中に浸漬してめ
っきを行う方法と、冷間圧延後の鋼板を非酸化性雰囲気
中に導入して、表面を研削した後、非酸化性雰囲気中て
表面調質圧延を行い、表面研削て生した新生面を空気に
触れさせることなく溶融金属中に浸漬してめっきを行う
方法に特徴がある。[Means for Solving the Problems] In order to achieve the above object, the present invention introduces a hot rolled steel plate into a non-oxidizing atmosphere, grinds the surface, and then
There is a method of hot rolling in a non-oxidizing atmosphere and plating by immersing the newly rolled surface in molten metal without exposing it to air, and a method of plating the steel plate after cold rolling in a non-oxidizing atmosphere. The unique feature of this method is that after the surface is ground, surface temper rolling is performed in a non-oxidizing atmosphere, and the new surface created by surface grinding is immersed in molten metal and plated without exposing it to air. be.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明において熱延鋼板に溶融めっきする場合、熱間圧
延後の鋼板をそのまま用いても良いか、好ましくは熱延
板の表面の醇化被膜を除いた鋼板をめっき原板としても
ちいる。鋼板は、非酸化性、または弱酸化性雰囲気中に
導入して加熱した後、あるいは常温のままてＮ２カス、
Ｎ２＋Ｈ２なとの非酸化性雰囲気中て表面の酸化膜を研
削除去し、その後、非酸化性雰囲気下て熱間圧延に必要
な所定の温度、例えは１１００〜１２００°Ｃまて加熱
される。加熱された鋼板は、つきにＮ２、またはＮ２−
←Ｎ、などの非酸化性雰囲気下て目標とする厚さに熱間
圧延され、これによって活性の高い新生面か鋼板表面に
生成する。熱間圧延終了後の鋼板は溶融めっきするのに
適した温度に調整され、そのまま空気に触れることなく
溶融めっきされる。このように、非酸化性雰囲気中で鋼
板を研削、熱間圧延することにより、容易に活性な表面
か得られるため密着性のすくれためっき鋼板を製造する
ことかてきる。When hot-dipping a hot-rolled steel sheet in the present invention, the hot-rolled steel sheet may be used as it is, or preferably, the steel sheet from which the maceration film on the surface of the hot-rolled sheet has been removed is used as the original plate. After the steel plate is introduced into a non-oxidizing or slightly oxidizing atmosphere and heated, or left at room temperature, N2 scum,
The oxide film on the surface is polished off in a non-oxidizing atmosphere such as N2 + H2, and then heated to a predetermined temperature required for hot rolling, for example 1100 to 1200°C, in a non-oxidizing atmosphere. The heated steel plate is heated with N2 or N2-
It is hot rolled to a target thickness in a non-oxidizing atmosphere such as ←N, and as a result, a highly active new surface is generated on the surface of the steel sheet. After hot rolling, the steel plate is adjusted to a temperature suitable for hot-dipping, and then hot-dipped without being exposed to air. As described above, by grinding and hot rolling a steel plate in a non-oxidizing atmosphere, an active surface can be easily obtained, making it possible to produce an adhesively-plated steel plate.
また本発明において冷間圧延後の鋼板に溶融めっきする
場合には、鋼板を非酸化性雰囲気に導入して常温、ある
いは加熱した後にＮ２カス。In addition, in the present invention, when hot-dipping a steel plate after cold rolling, the steel plate is introduced into a non-oxidizing atmosphere at room temperature, or after being heated, N2 scum is applied.
Ｎ２＋Ｈ２なとの非酸化性雰囲気中て表面を研削して鋼
板表面に新生面を生成させ、次いで非酸化性雰囲気中て
常温、あるいは熱間て軽度の調質圧延を行い前記の研削
による鋼板表面の荒れを調質する。表面調質後の鋼板は
溶融めっきに適した温度に調整され、そのまま空気に触
れることなく溶融めっきされる。The surface is ground in a non-oxidizing atmosphere such as N2 + H2 to generate a new surface on the steel plate surface, and then mild temper rolling is performed at room temperature or hot in a non-oxidizing atmosphere to improve the surface of the steel plate due to the grinding. Improve roughness. After surface conditioning, the steel plate is adjusted to a temperature suitable for hot-dip plating, and then hot-dipped without being exposed to air.
本発明て重要なことは、鋼板表面の醇化を防止するため
に研削、熱間圧延、調質圧延９等を行う間の炉内の雰囲
気の酸素濃度及び露点を低く保つことである。What is important in the present invention is to keep the oxygen concentration and dew point of the atmosphere in the furnace low during grinding, hot rolling, temper rolling 9, etc., in order to prevent the surface of the steel sheet from becoming thickened.
なお、本発明は／ｌ、Ｃｒ、Ｓｉ、Ｍｎなとの易酸化性
元素を多量に含有する鋼板にかきらず、通常の軟鋼を溶
融金属めっきする場合にも適用゛Ｃきることは言うまて
もない。It goes without saying that the present invention can be applied not only to steel plates containing large amounts of easily oxidizable elements such as /l, Cr, Si, and Mn, but also to the case of molten metal plating of ordinary mild steel. Nor.
［実施例］ 以下に、本発明法て溶融めっきを行った実施例を示す。[Example] Examples in which hot-dip plating was performed using the method of the present invention are shown below.
（実施例１）
めっき原板としては、１８％（：ｒ−８″％Ｎｉ不ｔ＾
鋼板の２．６ｎｖ厚の熱延鋼板を酸洗して用いた。鋼板
は７５ＺＨ２−Ｎ２雰囲気下て８０００Ｃ前後まてラジ
アン）−チューフ加熱し、おなしく７５％８２Ｎ ２雰
囲気下てスチールヨー１−ブラシで表面研削を行い、次
いてＮ２雰囲気下て加熱して板温］ ０５０〜９５０°
Ｃて圧延され６５０°Ｃに冷却後、１（）％Ｓ１−仔浴
（［ｉ５０°Ｃ）て溶融めっきした。比較材としては、
１１１％［：ｒ−８％Ｎ１不錆鋼板の１ｍｍ厚、１．５
１ｎｍ厚の冷延鋼板を通常のセンシマ一方式の連続溶融
めっきラインで溶融ＡＱ、めっきしたものを示した。表
１に示す通り、本発明の方法て製造された溶融めっき鋼
板は、全圧下率か５０％以上てあれは、外観・密着性と
もに良好てあった。(Example 1) As a plating original plate, 18% (:r-8″% Ni-free)
A hot rolled steel plate having a thickness of 2.6 nv was pickled and used. The steel plate was heated to around 8000C (radian) in a 75ZH2-N2 atmosphere, then surface ground with a steel yaw brush in a 75% 82N2 atmosphere, and then heated in a N2 atmosphere to form the plate. Temperature] 050~950°
After cooling to 650°C, hot-dip plating was carried out in a 1% S1 bath ([i50°C)]. As a comparison material,
111%[:r-8%N1 rust-free steel plate, 1mm thickness, 1.5
The figure shows a cold-rolled steel sheet with a thickness of 1 nm that was hot-dip AQ-plated using a conventional Sensima one-type continuous hot-dip plating line. As shown in Table 1, the hot-dip plated steel sheets produced by the method of the present invention had good appearance and adhesion when the total rolling reduction was 50% or more.
（実施例２）
めっき原板トシテハ、［］、Ｉ％Ｃ−］、０％ Ｓｉ
−１，５％Ｍｎを含む高張力鋼板の２．６ｍｍ厚の熱延
鋼板を酸洗して用いた。鋼板は弱酸化性雰囲気下て８０
０°Ｃまて予備加熱し、７５％Ｈ２〜Ｎ２雰囲気下てス
チールコートフラジて表面研削を行い、Ｎ２ｇ囲気下て
板温］０２０〜９］０°Ｃて圧延され、４５０°Ｃに冷
却後、［Ｌ２％ ＡＱ −Ｚｎ浴（４５０℃）て溶融め
っきした。(Example 2) Plating original plate Toshiteha, [], I%C-], 0% Si
A 2.6 mm thick hot-rolled high-strength steel plate containing -1.5% Mn was pickled and used. The steel plate was heated to 80% in a mildly oxidizing atmosphere.
Preheated to 0°C, surface ground with a steel coat flange under a 75% H2 to N2 atmosphere, rolled under a N2g atmosphere at a temperature of 020 to 9]0°C, and cooled to 450°C. , [Hot-dip plating was carried out in a L2% AQ-Zn bath (450°C).
比較材としては、同じ熱延鋼板を１ｍｍ厚。As a comparison material, the same hot-rolled steel plate was used with a thickness of 1 mm.
１．５ｍｍ厚に冷間圧延し、通常のセンシマ一方式の連
続溶融めっきラインで溶融Ｚｎめっきしたものを示した
。表１に示す通り、本発明の方法て製造された溶融めっ
き鋼板は、全圧下率か３０％以上てあれは、外観・害着
性ともに良好てあった。The material shown here was cold-rolled to a thickness of 1.5 mm and hot-dip Zn plated on a conventional Sensima one-type continuous hot-dip plating line. As shown in Table 1, the hot-dip plated steel sheets produced by the method of the present invention had good appearance and damage resistance when the total reduction was 30% or more.
Claims (1)
面を研削した後、非酸化性雰囲気中で熱間圧延を行い、
空気に触れさせる事なく溶融金属中に浸漬させることを
特徴とする溶融めっき鋼板の製造法。 ２、冷間圧延後の鋼板を非酸化性雰囲気中に導入して表
面を研削した後、非酸化性雰囲気中で表面調質圧延を行
い、空気に触れさせる事なく溶融金属中に浸漬させるこ
とを特徴とする溶融めっき鋼板の製造法。[Claims] 1. After introducing a hot rolled steel plate into a non-oxidizing atmosphere and grinding the surface, hot rolling is performed in a non-oxidizing atmosphere,
A method for producing hot-dip galvanized steel sheets characterized by immersing them in molten metal without exposing them to air. 2. After introducing the cold-rolled steel plate into a non-oxidizing atmosphere and grinding the surface, surface temper rolling is performed in a non-oxidizing atmosphere, and the steel plate is immersed in molten metal without being exposed to air. A method for producing hot-dipped steel sheets characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8538688A JPH01259153A (en) | 1988-04-08 | 1988-04-08 | Manufacture of hot dipped steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8538688A JPH01259153A (en) | 1988-04-08 | 1988-04-08 | Manufacture of hot dipped steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01259153A true JPH01259153A (en) | 1989-10-16 |
Family
ID=13857306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8538688A Pending JPH01259153A (en) | 1988-04-08 | 1988-04-08 | Manufacture of hot dipped steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01259153A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395702A (en) * | 1992-03-27 | 1995-03-07 | The Louis Berkman Company | Coated metal strip |
| FR2720079A1 (en) * | 1994-05-19 | 1995-11-24 | Lorraine Laminage | Hot dip coating steel with aluminium (alloy) |
| US5480731A (en) * | 1992-03-27 | 1996-01-02 | The Louis Berkman Company | Hot dip terne coated roofing material |
| US5491036A (en) * | 1992-03-27 | 1996-02-13 | The Louis Berkman Company | Coated strip |
| JP2004315965A (en) * | 2003-03-28 | 2004-11-11 | Jfe Steel Kk | Hot dip galvanized steel sheet having excellent spot weldability and slidability on press working, and production method therefor |
-
1988
- 1988-04-08 JP JP8538688A patent/JPH01259153A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395702A (en) * | 1992-03-27 | 1995-03-07 | The Louis Berkman Company | Coated metal strip |
| US5480731A (en) * | 1992-03-27 | 1996-01-02 | The Louis Berkman Company | Hot dip terne coated roofing material |
| US5491036A (en) * | 1992-03-27 | 1996-02-13 | The Louis Berkman Company | Coated strip |
| US5616424A (en) * | 1992-03-27 | 1997-04-01 | The Louis Berkman Company | Corrosion-resistant coated metal strip |
| FR2720079A1 (en) * | 1994-05-19 | 1995-11-24 | Lorraine Laminage | Hot dip coating steel with aluminium (alloy) |
| EP0698671A1 (en) * | 1994-05-19 | 1996-02-28 | Sollac S.A. | Method of hot dip aluminium coating of a steel strip, containing at least 0,1% of manganese, especially stainless and/or alloyed steel |
| JP2004315965A (en) * | 2003-03-28 | 2004-11-11 | Jfe Steel Kk | Hot dip galvanized steel sheet having excellent spot weldability and slidability on press working, and production method therefor |
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