JPS6362855A - Production of differential thickness alloyed hot dip zinc coated steel sheet - Google Patents
Production of differential thickness alloyed hot dip zinc coated steel sheetInfo
- Publication number
- JPS6362855A JPS6362855A JP20699186A JP20699186A JPS6362855A JP S6362855 A JPS6362855 A JP S6362855A JP 20699186 A JP20699186 A JP 20699186A JP 20699186 A JP20699186 A JP 20699186A JP S6362855 A JPS6362855 A JP S6362855A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- hot dip
- alloyed
- plating
- contg
- 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 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title description 4
- 239000011701 zinc Substances 0.000 title description 4
- 229910052725 zinc Inorganic materials 0.000 title description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 238000005275 alloying Methods 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 238000005246 galvanizing Methods 0.000 claims description 10
- 238000007747 plating Methods 0.000 abstract description 31
- 239000010410 layer Substances 0.000 abstract description 22
- 238000000576 coating method Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 7
- 239000010960 cold rolled steel Substances 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000000137 annealing Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract description 2
- 238000012935 Averaging Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 32
- 229910052742 iron Inorganic materials 0.000 description 16
- 229910001335 Galvanized steel Inorganic materials 0.000 description 11
- 239000008397 galvanized steel Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 4
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 4
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 101100165177 Caenorhabditis elegans bath-15 gene Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 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〕
本発明は差厚合金化溶融亜鉛めっき鋼板の製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing differential thickness alloyed hot-dip galvanized steel sheets.
亜鉛めっき鋼板は各Ｍ構造材例えば自動車用防錆鋼板な
どとして多量に使用されており、溶融亜鉛めっき鋼板の
合金化処理は鋼板地鉄の鉄分の拡散を利用するものであ
る。しかして従来は鋼板を溶融亜鉛めっき浴中に浸漬す
る方法が用いられており、例えば表裏両面のめっき厚さ
の異なる溶融亜鉛めっき鋼板例えば片面に５０ｆ／ｒ”
の亜鉛めっきを施し、反対側の面ｉｃ６０ ｒ／Ｖの亜
鉛めっさを施した溶融亜鉛めっき銅板は通常、鋼板に対
して溶融亜鉛をめっきした後気体絞シ（ワイピング）の
技術を適用し、条件をコントロールすることＫよって容
易に製造できる。Galvanized steel sheets are used in large quantities as various M structural materials, such as rust-proof steel sheets for automobiles, and the alloying treatment of hot-dip galvanized steel sheets utilizes the diffusion of iron in the base steel. Conventionally, however, a method has been used in which a steel plate is immersed in a hot-dip galvanizing bath.
Hot-dip galvanized copper sheets are galvanized with galvanization and the opposite side is galvanized with IC60R/V.Usually, the steel sheet is coated with hot-dip zinc and then gas wiping technology is applied. can be easily manufactured by controlling the conditions.
しかしながら、従来法では鋼板の表裏両面のめっき厚さ
が異なれば各々の合金化熱処理後のめつき層中の鉄分濃
度（鉄分量／めっき量＝合金化率）が異なシ、表裏両面
のめっき層中の鉄分濃度を同一とした合金化溶融亜鉛を
得ることはできなかった。However, in the conventional method, if the plating thickness on both the front and back sides of a steel sheet is different, the iron concentration (iron content / plating amount = alloying ratio) in the plating layer after each alloying heat treatment will be different. It was not possible to obtain alloyed molten zinc with the same iron concentration.
本発明は上記従来技術における問題点′ｆｆ：ｍ決する
ためのものでロシ、その目的とするところはめっき層の
厚さが異なる表裏両面のめっき層中の鉄分濃度を同一と
し、耐食性、プレス性能、溶接性等の緒特性を向上させ
製品の品質？高めることができる差厚合金化溶融亜鉛め
っき鋼板の製造方法を提供することに６る。The present invention is intended to solve the above-mentioned problems in the prior art, and its purpose is to make the iron concentration in the plating layer the same on both the front and back surfaces, which have different thicknesses, to improve corrosion resistance and press performance. , product quality by improving properties such as weldability? It is an object of the present invention to provide a method for manufacturing an alloyed hot-dip galvanized steel sheet with a differential thickness that can be increased.
すなわち本発明の差厚合金化溶融亜鉛めっき鋼板の製造
方法は、鋼板の表裏両面に片面づつ順にアルミニウム添
加蓋の異なる溶融亜鉛めっき液を用いてめっき層を形成
し、しかる後前記表裏両面金同時に合金化熱処理するこ
とを特徴とする。In other words, the method for producing a differential thickness alloyed hot-dip galvanized steel sheet of the present invention involves forming a plating layer on both the front and back sides of a steel sheet using a hot-dip galvanizing solution with a different aluminum addition cap on one side at a time, and then coating both the front and back surfaces at the same time. It is characterized by alloying heat treatment.
鋼板を溶融亜鉛めっき浴槽中に浸漬すると通常鋼板表面
とめっき層との界面は鉄の拡散が生じ、鉄−亜鉛合金層
が生成する。この状態を第２図に示す。図中、１は鋼板
、２及び３は亜鉛めっき層、４及び５は鉄−亜鉛合金層
を示す。When a steel plate is immersed in a hot-dip galvanizing bath, iron usually diffuses at the interface between the steel plate surface and the plating layer, forming an iron-zinc alloy layer. This state is shown in FIG. In the figure, 1 is a steel plate, 2 and 3 are galvanized layers, and 4 and 5 are iron-zinc alloy layers.
鉄の拡散全抑制する元素としてはアルミニウムが良く知
られている。亜鉛めっき浴慴のアルミニウム添加量とめ
っき鋼板における亜鉛めっき層中への鉄拡敬量との関係
全第３図に示す。Aluminum is well known as an element that completely inhibits iron diffusion. The relationship between the amount of aluminum added to the galvanizing bath and the amount of iron introduced into the galvanized layer of the galvanized steel sheet is shown in Figure 3.
そこでこれを利用し、アルミニウム添加量の異なる溶融
亜鉛めっき液を保持した２つの浴槽を使い、この浴槽中
の前記めっき成金鋼板の表裏両面に片面づつ順に塗布（
又は浸５Ｉ）する。Therefore, we took advantage of this by using two baths holding hot-dip galvanizing solutions containing different amounts of aluminum, and sequentially coating both the front and back sides of the galvanized steel sheet in these baths (one side at a time).
Or soak 5I).
そして、その塗布手段としてはロールコート法や電磁ポ
ンプ法等の慣用手段を用いることができる。このように
して予め表裏両面に鉄拡散レベルの異なるめっきｉＭヲ
持つめっき鋼板を作る。As the application means, conventional means such as a roll coating method and an electromagnetic pump method can be used. In this way, a plated steel sheet having plating iM with different levels of iron diffusion on both the front and back surfaces is prepared in advance.
なお、この場合、表裏両面のめっき層の厚さを変えるた
めには前記各めっき浴槽の後にニアブロアー等の厚さ調
節手段を設けて厚さを所定の厚さに調節する。In this case, in order to change the thickness of the plating layer on both the front and back surfaces, a thickness adjusting means such as a near blower is provided after each of the plating baths to adjust the thickness to a predetermined thickness.
合金化熱処理は加熱炉などの通常の手段を用いて所定条
件下で鋼板の表裏両面に同時に行う。The alloying heat treatment is performed simultaneously on both the front and back sides of the steel plate under predetermined conditions using a conventional means such as a heating furnace.
これＫより、表裏両面のめつき厚さは異なるが鉄−亜鉛
組成の等しい差厚合金化溶融亜鉛めっき鋼板を得ること
ができる。By using K, it is possible to obtain a differential thickness alloyed hot-dip galvanized steel sheet in which the front and back surfaces have different plating thicknesses but have the same iron-zinc composition.
以下の実施例に２いて本発明を更に詳細に説明する。な
お、本発明は下記実力ゐ例に限定されるものではない。The present invention will be explained in further detail in Example 2 below. It should be noted that the present invention is not limited to the following performance examples.
第１図に本発明の方法に用＾るめっき装置の一例の概略
構成図を示す。冷延鋼板６はコイル７よシ巻戻されて連
ｉ／ｃ焼鈍炉８によりて加熱され、ガイドローラ９に案
内されてめっき浴１０内のアルミニウム＠ｇ ［Ｌｌ
２重ｔチのめっき液１１（４（１０〜５００℃）がロー
ラ１２及び１３によって塗布され、次いでニアブロア１
４でめっき層の厚さが調節されて片面に６０？／♂の割
合で亜鉛めりき層が形成される。次すで前記片面と反対
側の面にめっき浴１５内のアルミニウム濃度１１５重量
％のめっキ液１６（４００〜５００℃）がロー２１７及
び１８によりて塗布され、次いでニアブロア１９でめっ
き層の厚さが調節されて片面に５０２／−の割合で亜鉛
めっき層が形成される。更に、両面に亜鉛めっき層の形
成された冷延鋼板６は合金化熱処理炉２０内に搬送され
、合金化熱処理炉２０内で５０Ｑ℃で１０秒間熱処理さ
れる。冷延鋼板６は更に過時効炉２１を通過してコイル
２２に巻き取られる。この場合、６０９７ｍ″亜鉛めっ
含亜鉛た側は４９／ｃｄの鉄拡散が、又、５０２／−亜
鉛めっきされた側は１２／ｄの鉄拡散が亜鉛めっき層中
に生じている。FIG. 1 shows a schematic configuration diagram of an example of a plating apparatus used in the method of the present invention. The cold-rolled steel sheet 6 is unwound by a coil 7, heated in a continuous I/C annealing furnace 8, and guided by guide rollers 9 to aluminum in a plating bath 10.
Double plating solution 11 (4 (10-500°C) is applied by rollers 12 and 13, and then near blower 1
The thickness of the plating layer is adjusted in step 4 to 60mm on one side. A galvanized layer is formed at a ratio of /♂. Next, a plating solution 16 (400 to 500° C.) with an aluminum concentration of 115% by weight in a plating bath 15 is applied to the surface opposite to the one surface using rows 217 and 18, and then a near blower 19 is used to coat the plating solution 16 to reduce the thickness of the plating layer. is adjusted to form a galvanized layer on one side at a ratio of 502/-. Furthermore, the cold-rolled steel sheet 6 with galvanized layers formed on both sides is transported into the alloying heat treatment furnace 20 and heat treated at 50Q° C. for 10 seconds in the alloying heat treatment furnace 20. The cold rolled steel sheet 6 further passes through an overaging furnace 21 and is wound into a coil 22. In this case, the 6097 m'' galvanized side has an iron diffusion of 49/cd, and the 502/-m galvanized side has an iron diffusion of 12/d in the galvanized layer.
く比較試験〉
亜鉛めっき層中への鉄の拡散量が各々３Ｆ／−及び６１
／−となるようにアルミニウム濃度を変えた２つのめつ
き浴Ａ及びＢを使用して本発明の方法と従来の方法とを
比較した。下記表に結果を示す。表中、Ａ及びＢは各々
めっき浴Ａ及びめりき浴Ｂｉ示し、又、数値はめりき層
中の鉄濃度を重量％で示す。Comparative test> The amount of iron diffusion into the galvanized layer was 3F/- and 61%, respectively.
The method of the present invention and the conventional method were compared using two plating baths A and B in which the aluminum concentration was changed so that the aluminum concentration was /-. The results are shown in the table below. In the table, A and B represent plating bath A and plating bath Bi, respectively, and the numerical values represent the iron concentration in the plating layer in weight %.
表 本発明の方法と従来の方法との比較前よシ明らかな
ように、本発明の方法はアルミニウム添加量の異なる溶
融亜鉛めっき浴を順に使用するため、従来の浸漬法と異
なり、めっき証が異なる場合であってもめつき層中の鉄
濃度を等しくすることができる。Table Comparison between the method of the present invention and the conventional method As is clear, the method of the present invention sequentially uses hot-dip galvanizing baths with different amounts of aluminum added, so unlike the conventional immersion method, there is no plating proof. Even in different cases, the iron concentration in the plating layer can be made equal.
〔発明の効果〕
上述のように本発明の差厚合金化溶融亜鉛めりき鋼板の
製造方法は、鋼板の表裏両面に、片面づつ順にアルミニ
ウム添加量の異なる溶融亜鉛めっき液を用いてめっき層
全形成し、しかる後前記表裏両面を同時に合金化熱処理
する方法であるため、従来の方法では差厚めつき鋼板に
於て表裏両面の亜鉛−鉄組成を同一にすることは不可能
であったものが本発明の方法を用いることＫよって可能
となシ、差厚めつき層中の鉄分濃度が同一となシ、得ら
れた製品の耐食性、プレス性能及び溶接性能等の緒特性
が向上した。[Effects of the Invention] As described above, the method for producing a differentially-thickness alloyed hot-dip galvanized steel sheet of the present invention applies a hot-dip galvanizing solution containing different amounts of aluminum to both the front and back surfaces of the steel sheet, so that the entire coating layer is coated on both sides of the steel sheet. Since this is a method in which both the front and back surfaces are alloyed and heat-treated at the same time, it is impossible to make the zinc-iron composition on both the front and back sides of a differentially plated steel sheet the same using conventional methods. By using the method of the present invention, it is possible to maintain the same iron concentration in the differentially thick plating layers, and the resulting products have improved properties such as corrosion resistance, press performance, and welding performance.
第１図は本発明の差厚合金化溶融亜鉛めっき鋼板の製造
方法に用いるめっき装置の一実施例の概略構成図、
第２図は溶融亜鉛めっき鋼板の一例の断面図、第５図は
亜鉛めっき浴槽中のアルミニウム濃度とめっき鋼板にお
ける亜鉛めっき層中への鉄の拡散量との関係を示すグラ
フである。
図中、
６１１．冷延鋼板 １０．１５・・・めっき浴１
１．１６・・・めっき液 １４．１９・・・ニアブロ
ア２０・・・合金化熱処理炉Fig. 1 is a schematic configuration diagram of an embodiment of a plating apparatus used in the method of manufacturing a differential thickness alloyed hot-dip galvanized steel sheet of the present invention, Fig. 2 is a cross-sectional view of an example of a hot-dip galvanized steel plate, and Fig. 5 is a zinc-coated steel sheet. It is a graph showing the relationship between the aluminum concentration in the plating bath and the amount of iron diffusion into the galvanized layer of the plated steel sheet. In the figure, 611. Cold rolled steel plate 10.15...Plating bath 1
1.16... Plating solution 14.19... Near blower 20... Alloying heat treatment furnace
Claims (1)
異なる溶融亜鉛めっき液を用いてめっき層を形成し、し
かる後前記表裏両面を同時に合金化熱処理することを特
徴とする差厚合金化溶融亜鉛めっき鋼板の製造方法。Differential thickness alloying hot-dip galvanizing, which is characterized in that a galvanizing layer is formed on both the front and back sides of a steel sheet using a hot-dip galvanizing solution with a different amount of aluminum added on each side, and then both the front and back sides are heat-treated for alloying at the same time. Method of manufacturing steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699186A JPS6362855A (en) | 1986-09-03 | 1986-09-03 | Production of differential thickness alloyed hot dip zinc coated steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699186A JPS6362855A (en) | 1986-09-03 | 1986-09-03 | Production of differential thickness alloyed hot dip zinc coated steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6362855A true JPS6362855A (en) | 1988-03-19 |
Family
ID=16532373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20699186A Pending JPS6362855A (en) | 1986-09-03 | 1986-09-03 | Production of differential thickness alloyed hot dip zinc coated steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6362855A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005021822A1 (en) * | 2003-07-29 | 2005-03-10 | Voestalpine Stahl Gmbh | Method for producing a hardened steel part |
-
1986
- 1986-09-03 JP JP20699186A patent/JPS6362855A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005021822A1 (en) * | 2003-07-29 | 2005-03-10 | Voestalpine Stahl Gmbh | Method for producing a hardened steel part |
| US8021497B2 (en) | 2003-07-29 | 2011-09-20 | Voestalpine Stahl Gmbh | Method for producing a hardened steel part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2922926B2 (en) | Manufacturing method of alloyed galvanized steel strip | |
| JPH04147953A (en) | Production of galvannealed steel sheet | |
| JP2587725B2 (en) | Method for producing P-containing high tensile alloyed hot-dip galvanized steel sheet | |
| JPH04202633A (en) | Production of hot-dip galvanized sheet of high tensile strength steel with high si content | |
| JPH0238549A (en) | Manufacture of alloyed hot-dip galvanized steel sheet | |
| JPS6362855A (en) | Production of differential thickness alloyed hot dip zinc coated steel sheet | |
| JPH07126863A (en) | Flexible production equipment for metallic sheet and plated metallic sheet | |
| JPS63312960A (en) | Manufacture of zinc alloy hot dip galvanized steel sheet having superior workability | |
| JP3114609B2 (en) | Method for producing galvannealed steel sheet with excellent surface properties | |
| JP2705386B2 (en) | Hot-dip galvanizing method for Si-containing steel sheet | |
| JPS58189363A (en) | Manufacture of steel plate coated with alloyed zinc by galvanization | |
| JPH08170160A (en) | Production of silicon-containing high tensile strength hot dip galvanized or galvannealed steel sheet | |
| JPH02258962A (en) | Equipment for producing galvanizing steel sheet having excellent weldability | |
| JP2616945B2 (en) | Manufacturing method of hot-dip galvanized steel sheet with differential thickness | |
| JPH05106001A (en) | Hot-dip galvanizing method for silicon-containing steel sheet | |
| JPH0368749A (en) | Production of hot dip galvanized steel sheet | |
| JPH04276055A (en) | Manufacture of differential galvannealed steel | |
| JPS6056790B2 (en) | Method for producing hot-dip galvanized steel sheet alloyed on only one side | |
| JPH07243012A (en) | Production of galvannealed steel sheet excellent in external appearance of surface | |
| JP3376914B2 (en) | Manufacturing method and apparatus for hot-dip galvanized steel sheet | |
| JP3166568B2 (en) | Manufacturing method of hot-dip galvanized steel | |
| JPS6358225B2 (en) | ||
| KR950004778B1 (en) | Method for making a galvannealed steel sheet with an excellant anti-powdering | |
| KR900004853B1 (en) | Making process for steel plate for galvanization | |
| JPH111755A (en) | Galvanized steel sheet and its production |