JPS60245727A - Manufacture of aluminized steel sheet - Google Patents
Manufacture of aluminized steel sheetInfo
- Publication number
- JPS60245727A JPS60245727A JP59101455A JP10145584A JPS60245727A JP S60245727 A JPS60245727 A JP S60245727A JP 59101455 A JP59101455 A JP 59101455A JP 10145584 A JP10145584 A JP 10145584A JP S60245727 A JPS60245727 A JP S60245727A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- steel
- corrosion resistance
- plating
- less
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 229910000680 Aluminized steel Inorganic materials 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 28
- 238000005260 corrosion Methods 0.000 abstract description 28
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 239000010960 cold rolled steel Substances 0.000 abstract 2
- 238000005269 aluminizing Methods 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 27
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 2
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910018663 Mn O Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、耐食性と耐熱性のすぐれた溶融アルミニウム
メッキ鋼板の製造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 a hot-dip aluminum plated steel sheet with excellent corrosion resistance and heat resistance.
従来の技術
アルミニウムメンキ鋼板は耐食性と耐熱性にすぐれてい
ることから、高価なステンレス鋼板に代わって家庭用熱
器具、自動車用排気系材料などに多く使用されて来てい
る。これらのアルミニウムメッキ鋼板は一般に、冷間圧
延された冷延板を、無酸化性または弱酸化性雰囲気中で
加熱して圧延油などを燃焼除去し、続いて還元性雰囲気
中で加熱し表面を活性化する焼鈍過程を経て、溶融アル
ミニウム浴中に浸漬する方法で製造されている。BACKGROUND OF THE INVENTION Aluminum-coated steel sheets have excellent corrosion resistance and heat resistance, and are now widely used in household heating appliances, automobile exhaust systems, etc. in place of expensive stainless steel sheets. These aluminum-plated steel sheets are generally produced by heating a cold-rolled sheet in a non-oxidizing or slightly oxidizing atmosphere to burn off rolling oil and the like, and then heating it in a reducing atmosphere to improve the surface. It is manufactured by immersion in a molten aluminum bath after an activating annealing process.
従来、公表されている耐熱性溶融アルミニウムメンキ鋼
板としては、たとえば、特公昭５２−３３５７９号公報
には「アルミニウムメッキ浴に少量の８１を添加した従
来型メッキ鋼板」、及びこれを改良した「鋼中にＯｒ
５〜１５％未満とＳｉ ２．０％以下を存在させ、表面
のＡｉの有効濃度が低下することを阻止して、耐熱寿命
を延長させると同時に、表面に生成する酸化膜がＦａ−
Ｃｒ−３ｉ酸化物、またはＦｅ−Ｃｒ酸化物となって、
緻密な保護皮膜を形成して高温度における耐酸化性を向
上したメッキ鋼板」の例が開示されている。又、特開昭
５８−１０２５５８号公報には「鋼中にＣｒ Ｏ，０１
〜５％、Ｔｉ Ｏ，２〜Ｏ，［ｉ％を存在させ、かつＴ
ｉ／Ｃ＋Ｎ比が２０倍以北の鋼板に溶融アルミニウムメ
ッキを施したメンキ鋼板」の例が開示されているなど、
多くの種類の鋼板が提案されている。Conventional heat-resistant molten aluminum coated steel sheets that have been published include, for example, ``Conventional plated steel sheet with a small amount of 81 added to the aluminum plating bath'' and an improved version of this, ``Conventional plated steel sheet with a small amount of 81 added to the aluminum plating bath'' in Japanese Patent Publication No. 52-33579. Or in steel
The presence of less than 5% to 15% Si and less than 2.0% Si prevents the effective concentration of Ai on the surface from decreasing and extends the heat-resistant life. At the same time, the oxide film formed on the surface is
Becomes Cr-3i oxide or Fe-Cr oxide,
An example of "plated steel sheet with improved oxidation resistance at high temperatures by forming a dense protective film" is disclosed. In addition, Japanese Patent Application Laid-open No. 102558/1983 states that ``CrO,01
~5%, TiO,2~O,[i% present and T
Examples of ``coated steel sheets with hot-dip aluminum plating on steel sheets with an i/C+N ratio of 20 times or more'' are disclosed.
Many types of steel plates have been proposed.
発明か解決しようとする問題点
しかしながら、これらメンキ鋼板の耐食性と耐熱性に対
する改善要望は大きく、又、不メツキ部分やピンホーノ
ドの出現によって、耐食性と１耐熱性が局部的に損なわ
れることがあること、又、比較的温度の高い酸化性ガス
使用環境においては、酸化増量が大きく耐熱寿命か短い
こと、などに対する改善要望が大きかった。Problems to be Solved by the Invention However, there is a strong desire to improve the corrosion resistance and heat resistance of these thin steel sheets, and the corrosion resistance and heat resistance may be locally impaired due to the appearance of unmetallic parts or pinholes. In addition, in environments where oxidizing gases are used at relatively high temperatures, there has been a strong desire to improve the oxidation weight increase and short heat-resistant life.
問題点を解決するだめの手段
本発明者らは、すぐれた耐食性と耐熱性が安定して得ら
れる溶融アルミニウムメッキ鋼板の製造法を開発するこ
とを目的に鋼成分より検討した結果、鋼中に含有される
Ｓｌの少量化を図り、かつＣｒ、Ｔｉを添加した鋼板を
溶融アルミニウムメッキすることによって、すぐれた耐
食性と耐熱性が安定して得られるメッキ鋼板が製造され
ることを知見した。Alternative Means to Solve the Problems The inventors of the present invention have investigated the composition of steel with the aim of developing a manufacturing method for hot-dip aluminum plated steel sheets that can stably obtain excellent corrosion resistance and heat resistance. It has been found that by reducing the amount of Sl contained and applying hot-dip aluminum plating to a steel plate to which Cr and Ti are added, a plated steel plate that stably provides excellent corrosion resistance and heat resistance can be produced.
本発明は、この知見から完成されたもので、Ｃ０９０１
％以下、Ｓｉ ０．１％以下、Ｍｎ Ｏ，１−１，５％
、Ｃｒ３〜１２％、Ｔｉ ０．０３〜Ｏ，ＩＥｔ％、Ａ
Ｑ Ｏ，０８％以下、Ｎ Ｏ，００４％以下を含有して
、残部か鉄および不可避的不純物からなる冷延板を焼鈍
し、しかる後溶融アルミニウムメッキする耐食性と耐熱
性のすぐれたメンキ鋼板の製造法である。The present invention was completed based on this knowledge, and C0901
% or less, Si 0.1% or less, Mn O, 1-1,5%
, Cr3-12%, Ti 0.03-O, IEt%, A
A cold-rolled sheet containing up to 8% of Q O and up to 4% of N O, with the balance consisting of iron and unavoidable impurities, is annealed and then plated with hot-dip aluminum to produce a steel sheet with excellent corrosion resistance and heat resistance. It is a manufacturing method.
作用
以下１本発明について図面を参照しながら詳細に説明す
る。Function: The present invention will be explained in detail below with reference to the drawings.
本発明においては、転炉、電気炉など通常の溶解炉で溶
製された溶鋼を、造塊−分塊法あるいは連続鋳造法を経
て銅片とし、これを熱間圧延し、酸洗し、冷間圧延する
薄鋼板の一般製造工程で冷延板を製造し、これを焼鈍す
る。この場合、前記した冷延板の鋼成分は、溶融アルミ
ニウムメッキ後の鋼板の諸性質に及よぼす作用効果から
足めたものである。In the present invention, molten steel melted in a normal melting furnace such as a converter or an electric furnace is made into copper pieces through an ingot-blowing method or a continuous casting method, which is then hot-rolled, pickled, A cold-rolled sheet is produced in a general manufacturing process for cold-rolled thin steel sheets, and then annealed. In this case, the above-mentioned steel components of the cold-rolled sheet are determined based on the effect they have on the properties of the steel sheet after hot-dip aluminum plating.
すなわち、Ｃは、含有量が増加すると鋼のメッキ漏れ性
を劣化せしめて不メツキ部分を誘発し、溶融アルミニウ
ムメッキ後の耐食性と耐熱性を劣化せしめる誘因となる
。したがって本発明において、Ｃは有害成分として０．
０１％以下に抑え、しかも少ない含有量はど好ましい。That is, when the content of C increases, it deteriorates the plating leakage property of steel, induces unplated parts, and causes deterioration of corrosion resistance and heat resistance after hot-dip aluminum plating. Therefore, in the present invention, C is a harmful component of 0.
It is preferable to suppress the content to 0.01% or less, and to keep the content as low as possible.
Ｓｉは鋼中に０．１％を越える過剰な含有量になると、
冷延板の製造時あるいは焼鈍時、鋼板表面に生成したＳ
ｉ酸化物またはＦｅ−３ｉ酸化物によってメッキ漏れ性
を阻害し、不メツキ部分やピンホールを発生して第１図
に示すように耐食性を劣化し、耐熱性も劣化する。した
がってＳｉは、Ｃと同様に、有害成分として含有量を少
なめとする必要がある。When Si content exceeds 0.1% in steel,
S generated on the steel sheet surface during manufacturing or annealing of cold rolled sheets
i oxide or Fe-3i oxide inhibits plating leakage, generates unplated parts and pinholes, and deteriorates corrosion resistance as shown in FIG. 1, as well as heat resistance. Therefore, like C, the content of Si needs to be kept low as it is a harmful component.
Ｋｎは、アルミニウムメッキ浴における鋼板の漏れ性を
改善して、微視的不メツキ部分の発生を防止し、メッキ
鋼板の耐食性と耐熱性を向上する。Kn improves the leakage of the steel sheet in an aluminum plating bath, prevents the occurrence of microscopic unplated parts, and improves the corrosion resistance and heat resistance of the plated steel sheet.
第２図は鋼中Ｍｎ量が耐食性に及よぼす影響を示したも
のである。すなわちＭｎが０．１％未満の少ない含有量
では耐食性が得られず、また１、５％を越える過剰な含
有量ではメッキ密着性を阻害し、各種の形状の加工時に
剥離して、耐食性と耐熱性を著しく劣化する。本発明に
おいて鋼中のＭｎは、上記のような作用効果を考慮して
０．１〜１．５％に限定した。FIG. 2 shows the influence of the amount of Mn in steel on corrosion resistance. In other words, a small Mn content of less than 0.1% will not provide corrosion resistance, and an excessive content of more than 1.5% will inhibit plating adhesion and will peel off during processing into various shapes, resulting in poor corrosion resistance. Heat resistance deteriorates significantly. In the present invention, Mn in the steel is limited to 0.1 to 1.5% in consideration of the above effects.
Ｃｒは、第３図で示すように、鋼中に含有されて、メッ
キ前後の鋼板の耐食性を向」ニさせるために添加するも
のである。Ｃｒ量が３％未満では耐食性向−Ｆ効果が小
さい。したがってＣｒは３％以」二の添加が必要である
。しかしながらＣｒ量が１２％を越える過剰な含有は、
溶融アルミニウムメッキにおいて不メツキやピンホール
を発生し、メッキによる耐食性さらには耐熱性の向」二
が損なわれる。すなわち本発明においてＣｒは３〜１２
％の含有が必要である。As shown in FIG. 3, Cr is contained in steel and is added to improve the corrosion resistance of the steel plate before and after plating. If the Cr content is less than 3%, the corrosion resistance -F effect is small. Therefore, it is necessary to add 3% or more of Cr. However, if the Cr content exceeds 12%,
In hot-dip aluminum plating, defects and pinholes occur, impairing the corrosion resistance and heat resistance of the plating. That is, in the present invention, Cr is 3 to 12
% content is required.
Ｔｉは、鋼中のＣ，Ｎを固定して鋼板の加工性を付与す
ると共に、耐食性向上成分として添加したＣｒの炭・窒
化を防止して、第４図に示すように耐食性を維持し、メ
ッキ鋼板を耐熱材料として使用し、高温度の加熱を受け
た場合、メッキ層が地鉄に拡散して耐酸化性のすぐれた
皮膜を形成し、第５図に示すように耐熱性を向上する。Ti fixes C and N in the steel and imparts workability to the steel sheet, and also prevents carbonization and nitridation of Cr added as a corrosion resistance improving component to maintain corrosion resistance as shown in Figure 4. When a plated steel plate is used as a heat-resistant material and subjected to high-temperature heating, the plating layer diffuses into the base steel to form a film with excellent oxidation resistance, improving heat resistance as shown in Figure 5. .
これらの効果を得るために、Ｔｉは０．０３％以上の含
有か必要である。また鋼中Ｔｉ含有量が多くなる程、高
温度の加熱を受けた時メー７羊層の拡散が速やかに生じ
、耐熱性の点から有利であるが、０．１６％を越えると
溶鋼時Ｔ１が還元剤として働き、スラグ、耐火物材料な
どから８１が混入して不メッキ、ピンホールを発生して
、メッキ後の耐食性と耐熱性の低下を招き易い。したが
って本発明においてＴｉは、耐食性が阻害されることな
く耐熱性が著しく向上せしめられる範囲として、０．０
３〜０．Ｌ６％に限定した。In order to obtain these effects, it is necessary to contain Ti in an amount of 0.03% or more. In addition, the higher the Ti content in the steel, the more rapidly the diffusion of the Mei7 layer occurs when the steel is heated to a high temperature, which is advantageous in terms of heat resistance, but if it exceeds 0.16%, the T1 acts as a reducing agent, and 81 is mixed in from slag, refractory materials, etc., resulting in non-plating and pinholes, which tends to cause a decrease in corrosion resistance and heat resistance after plating. Therefore, in the present invention, Ti should be added in a range of 0.0
3-0. L was limited to 6%.
ＡＱは、ＣｒおよびＴ１の添加歩留を向上させる予備脱
酸剤として使用するものであるが、鋼中に残存する多量
の酸可溶Ａ９はメッキ性を低下して不メツキ発生の原因
となるので、その上限を０．０８％に限定した。AQ is used as a preliminary deoxidizing agent to improve the addition yield of Cr and T1, but a large amount of acid-soluble A9 remaining in the steel reduces plating properties and causes unplating. Therefore, the upper limit was limited to 0.08%.
Ｎの含有量の増加はＴｉ窒化物を形成して必要量具」−
のＴｉを添加せしめ、鋼板のメッキ漏れ性を低下せしめ
る有害成分として０．００４％以下に抑制する必要があ
る。Increasing the N content forms Ti nitrides and increases the required amount.
It is necessary to add Ti to 0.004% or less as a harmful component that reduces the plating leakage of steel sheets.
また鋼製造上不可避的不純物として混入されるＰ、Ｓな
どは、加工性やメッキ諸特性を低下せしめる成分として
出来るだけ少ないことが好ましく、Ｐは０．０３％以下
、Ｓは０．０２％以下がよい。In addition, it is preferable that P, S, etc., which are unavoidable impurities mixed in during steel manufacturing, be as small as possible as they are components that reduce workability and various plating properties, with P being 0.03% or less and S being 0.02% or less. Good.
本発明はこのような成分組成の冷延板を再結晶温度以上
で焼鈍する。その焼鈍は連続焼鈍、箱焼鈍いずれでもよ
い。In the present invention, a cold-rolled sheet having such a composition is annealed at a temperature equal to or higher than the recrystallization temperature. The annealing may be either continuous annealing or box annealing.
このようにして焼鈍を終えたメッキ原板は、温度７００
℃前後の溶融アルミニウムメッキ浴中に浸漬してアルミ
ニウムメッキ処理し、次いで浴温ないし６００°Ｃの温
度から直ちにあるいは過時効処理を経て、常温まで任意
の速度で冷却される。The plated original plate that has been annealed in this way is heated to a temperature of 700
It is immersed in a molten aluminum plating bath at around 0.degree. C. for aluminum plating, and then cooled from the bath temperature to 600.degree. C. immediately or after an overaging treatment to room temperature at an arbitrary rate.
実施例 次に本発明の実施例について説明する。Example Next, examples of the present invention will be described.
転炉で溶製し、連続鋳造法で鋼片となし、熱間圧延、酸
洗を経て板厚０．８ｍｍに冷間圧延（圧Ｆ率６８％）さ
れた第１表に示した各種成分の冷延板を、予熱炉、均熱
炉、冷却炉、溶融メッキ装置などからなるゼンジマー型
連続溶融アルミニウムメッキ装置（メッキ浴温度＝７３
０℃）で連続溶融アルミニウムメッキを行い、目付量が
８０ｇ／ｒｒｌ’のメッキ鋼板を製造した。得られた各
メンキ鋼板の耐食性、メッキ密着性、耐熱性を第１表に
示す。The various components shown in Table 1 were melted in a converter, made into steel slabs by continuous casting, hot rolled, pickled, and then cold rolled to a thickness of 0.8 mm (rolling ratio: 68%). The cold-rolled sheets are processed in a Sendzimer-type continuous hot-dip aluminum plating system (plating bath temperature = 73
Continuous hot-dip aluminum plating was performed at 0° C.) to produce a plated steel sheet with a basis weight of 80 g/rrl'. Table 1 shows the corrosion resistance, plating adhesion, and heat resistance of each of the obtained steel sheets.
この結果から 本発明メッキ鋼板は、比較材（従来材）
のメンキ銅板に比し、腐食減量か少く、外観も良好で耐
食性がすぐれ、又、高温度の加熱後の表面状態も良好で
耐熱性もすぐれていることがわかる。From this result, the plated steel sheet of the present invention is compared to the comparative material (conventional material).
It can be seen that compared to the Menki copper plate, the corrosion loss is small, the appearance is good and the corrosion resistance is excellent, and the surface condition after heating at high temperatures is also good and the heat resistance is also excellent.
なお、前記Ｓ１〜５図及び第１表における性能試験は次
の方法で行った。The performance tests shown in Figures S1 to S5 and Table 1 were conducted in the following manner.
（１）耐蝕性
（ＮＨ４） ２ Ｓ Ｏ４１ｇ／ Ｑ 、 ＮＨ４ＮＯ
３１，５ｇ／ Ｑ、、 ＮＨ４ＣＱＯ，５ｇ／ｉの組成
の温度８０°Ｃの水溶液中に供試材を３０日間浸漬して
、重量減（腐蝕減量）と外観を調べた。外観は
■ 良好 〇 一部腐蝕
△ 腐蝕やや著しい × 全面腐蝕
として表示した。(1) Corrosion resistance (NH4) 2 SO41g/Q, NH4NO
The test material was immersed for 30 days in an aqueous solution having a composition of 31.5 g/Q, NH4CQO, 5 g/i at a temperature of 80°C, and the weight loss (corrosion loss) and appearance were examined. Appearance: ■ Good 〇 Partially corroded △ Slightly significant corrosion × Totally corroded.
（２）メンキ冗着性
リハースヘンドによる試験を行った。■は異常なし、２
は亀裂発生、３は一部剥離、４はメッキ剥離大、５は全
面メッキ剥離を示す。(2) A test was conducted by rehearsing redundancy. ■No abnormality, 2
3 indicates cracking, 3 indicates partial peeling, 4 indicates severe plating peeling, and 5 indicates complete plating peeling.
（３）＃熱性
供試材を６００℃で２０時間加熱して、表面状態を観察
した。■は表面良好、×は点状赤錆多い場合である。(3) #The thermal test material was heated at 600° C. for 20 hours, and the surface condition was observed. ■ indicates that the surface is good, and x indicates that there is a lot of dotted red rust.
発明の効果
−に記のように本発明方法によれば耐食性、耐熱性、加
工性の共にすぐれた溶融アルミニウムメンキ銅板が得ら
れる。As described in ``Effects of the Invention'', according to the method of the present invention, a molten aluminum coated copper plate having excellent corrosion resistance, heat resistance, and workability can be obtained.
第１〜４図は各鋼成分が耐食性に及ぼす影響を示したグ
ラフである。又、第５図は耐熱性鋼中Ｔｉ量が耐熱性に
及ぼす影響を示したグラフである。
特許出願人 新日本製鐵株式會針
代理人弁理士井上雅生
第１図
頒中５ｉｔ（％）
第２図
鎖中Ｍｎ量（％）
第３図
赳中Ｃｒ１（杯）
第４図
鎖中Ｔｉ１（％）
第５図
＠中Ｔｉｔ（％）Figures 1 to 4 are graphs showing the influence of each steel component on corrosion resistance. Moreover, FIG. 5 is a graph showing the influence of the amount of Ti in heat-resistant steel on heat resistance. Patent Applicant: Nippon Steel Stock Company Representative Patent Attorney Masao Inoue Fig. 1: 5it (%) Fig. 2: Mn content (%) Fig. 3: Cr1 (cup) Fig. 4: Ti1 during the chain (%) Figure 5 @ Middle Tit (%)
Claims (1)
１，５％、Ｃｒ３〜１２％、Ｔｉ ０．０３〜Ｏ，Ｉｆ
１％、Ａｉ Ｏ，０８％以下、Ｎ Ｏ，００４％以下を
含有して、残部が鉄および不可避的不純物からなる冷延
板を焼鈍し、しかる後溶融アルミニウムメッキすること
を特徴とする溶融アルミニウムメッキ鋼板の製造法。CO, 01% or less, Si 0.1% or less, MnO, l-
1.5%, Cr3-12%, Ti 0.03-O, If
Molten aluminum characterized by annealing a cold-rolled sheet containing 1% or less, AiO, 08% or less, and N2O, 004% or less, with the remainder consisting of iron and inevitable impurities, and then plated with molten aluminum. Manufacturing method for plated steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59101455A JPS60245727A (en) | 1984-05-19 | 1984-05-19 | Manufacture of aluminized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59101455A JPS60245727A (en) | 1984-05-19 | 1984-05-19 | Manufacture of aluminized steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60245727A true JPS60245727A (en) | 1985-12-05 |
| JPH0348260B2 JPH0348260B2 (en) | 1991-07-23 |
Family
ID=14301165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59101455A Granted JPS60245727A (en) | 1984-05-19 | 1984-05-19 | Manufacture of aluminized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60245727A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0246418A2 (en) * | 1986-05-20 | 1987-11-25 | Armco Inc. | Hot dip aluminium coated chromium alloy steel |
| US4729929A (en) * | 1985-01-17 | 1988-03-08 | Nisshin Steel Co., Ltd. | Highly corrosion resistant aluminized steel sheet for the manufacture of parts of exhaust gas system |
| US5066549A (en) * | 1986-05-20 | 1991-11-19 | Armco Inc. | Hot dip aluminum coated chromium alloy steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233579A (en) * | 1975-09-09 | 1977-03-14 | Agency Of Ind Science & Technol | Radiation dose measuring method |
-
1984
- 1984-05-19 JP JP59101455A patent/JPS60245727A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233579A (en) * | 1975-09-09 | 1977-03-14 | Agency Of Ind Science & Technol | Radiation dose measuring method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4729929A (en) * | 1985-01-17 | 1988-03-08 | Nisshin Steel Co., Ltd. | Highly corrosion resistant aluminized steel sheet for the manufacture of parts of exhaust gas system |
| EP0246418A2 (en) * | 1986-05-20 | 1987-11-25 | Armco Inc. | Hot dip aluminium coated chromium alloy steel |
| US5066549A (en) * | 1986-05-20 | 1991-11-19 | Armco Inc. | Hot dip aluminum coated chromium alloy steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0348260B2 (en) | 1991-07-23 |
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