JPS63213658A - Aluminum-plated steel sheet excellent in heat resistance - Google Patents
Aluminum-plated steel sheet excellent in heat resistanceInfo
- Publication number
- JPS63213658A JPS63213658A JP4706687A JP4706687A JPS63213658A JP S63213658 A JPS63213658 A JP S63213658A JP 4706687 A JP4706687 A JP 4706687A JP 4706687 A JP4706687 A JP 4706687A JP S63213658 A JPS63213658 A JP S63213658A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- steel
- heat resistance
- aluminum
- plated steel
- 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 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 238000007747 plating Methods 0.000 claims description 9
- 229910000680 Aluminized steel Inorganic materials 0.000 claims description 5
- 238000001771 vacuum deposition Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 238000000576 coating method Methods 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 abstract 2
- 238000007598 dipping method Methods 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 238000007740 vapor deposition Methods 0.000 abstract 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 19
- 230000003647 oxidation Effects 0.000 description 16
- 238000007254 oxidation reaction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
【発明の詳細な説明】
Ｃ産業上の利用分野〕
本発明は耐食性と耐熱性にすぐれたアルミニウムメッキ
鋼板に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an aluminum plated steel sheet with excellent corrosion resistance and heat resistance.
アルミニウムメッ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、自動車排気系材料などに多用されている。Aluminum-plated steel sheets have excellent corrosion resistance and heat resistance, so they are often used in household heating appliances, automobile exhaust systems, etc. in place of expensive stainless steel sheets.
特に最近では、特公昭５１−３５５３２号公報に示され
た「鋼中にＣｒ５〜１５％とＳｉ２．０％以下を共存さ
せ、表面のＡｌ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Ｆｅ−Ｃｒ−５ｉ酸化物またはＦｅ −Ｃｒ酸化物と
なって、高温度における耐酸化性を向上したメッキ鋼板
」や特開昭６１−２３１１５２号公報に示された「鋼中
にＣｒ１〜１２％、Ｔｉ０．０３〜０．１６％、Ｂ Ｏ
，０００５〜０．００３％を含有することによって鋼板
に加工性を与え、また、メッキ鋼板が加熱を受けた場合
に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、耐熱性を向上させた鋼板」等が提案されてい
る。Particularly recently, as shown in Japanese Patent Publication No. 51-35532, ``5 to 15% Cr and 2.0% or less Si are allowed to coexist in the steel to prevent the effective concentration of Al on the surface from decreasing.
``Plated steel sheet that has extended heat-resistant life and at the same time the oxide film that forms on the surface becomes Fe-Cr-5i oxide or Fe-Cr oxide, improving oxidation resistance at high temperatures'' and JP-A-61- No. 231152, “1 to 12% of Cr, 0.03 to 0.16% of Ti, BO
,0005 to 0.003% gives the steel sheet workability, and when the plated steel sheet is heated, the plating layer diffuses into the base steel to form a film with excellent oxidation resistance. , a steel plate with improved heat resistance, etc. have been proposed.
しかしながら、Ｃｒ添加鋼をアルミメッキ原板に用いる
場合、Ｃｒが高価であること、及びＣｒ添加量が多くな
ると、鋼材が硬質化し、成形加工性が損われ、また、自
硬性があるために溶接が困難になる等の欠点がある。However, when using Cr-added steel as an aluminized base plate, Cr is expensive, and if the amount of Cr added increases, the steel becomes hard, impairing formability, and self-hardening makes welding difficult. There are drawbacks such as difficulty.
そこで本発明は上記欠点のない鋼板、すなわち、少量の
ＣｒとＡＩ！を添加した鋼材を用いた、廉価で、耐酸化
性にすぐれ、しかも成形加工、溶接性にすぐれたアルミ
メッキ鋼板の提供を目的とするものである。Therefore, the present invention provides a steel plate that does not have the above-mentioned drawbacks, that is, a small amount of Cr and AI! The object of the present invention is to provide an inexpensive aluminized steel sheet that is made of a steel material with added oxidation and has excellent oxidation resistance, as well as excellent formability and weldability.
Ｃ問題点を解決するための手段〕
上記問題点を解決し、本発明の目的を達成するための手
段は、ＣＯ，ＯＯｌ 〜０．１％、Ｍｎ０．１〜１．５
％、Ｃｒ２〜９％、ＡＩｏ、３〜３％を含有し、残部が
Ｆｅおよび不可避的に混入する不純物からなる鋼板に、
アルミニウムまたは１０％以下のＳｉを含有するアルミ
ニウムを、真空蒸着法あるいは溶融メッキ法により被覆
したことを特徴とするものである。Means for Solving Problem C] Means for solving the above problems and achieving the object of the present invention are CO, OOl ~0.1%, Mn 0.1-1.5
%, Cr2-9%, AIo, 3-3%, and the balance is Fe and impurities inevitably mixed into the steel plate.
It is characterized by being coated with aluminum or aluminum containing 10% or less of Si by vacuum evaporation or hot-dip plating.
本発明においては、鋼板中のＣ，Ｍｎ、 Ｃｒ、 Ａｒ
の含有量を所定範囲内に押えることにより耐酸化性、耐
食性、成形加工性、溶接性など諸性質の向上を図るもの
であるが、作用効果上、本発明の主眼となる点は、鋼材
中のＣｒのうち少量をＡ２で置換させている点である。In the present invention, C, Mn, Cr, Ar in the steel plate
The purpose of this invention is to improve various properties such as oxidation resistance, corrosion resistance, formability, and weldability by suppressing the content of The point is that a small amount of Cr is replaced with A2.
すなわち、綱材中に少量のＣｒと八！を共存させること
により、鋼材自身の耐酸化性を向上させ、鋼材とアルミ
皮膜の界面での選択酸化を押えている。また、綱材中へ
のＡｌの拡散を容易にし、拡散によって鋼材中のＡ ｅ
ｆ１度が上昇することでさらに耐酸化性を増す。さら
に、Ｃｒの含有量を減らすことにより、鋼材自身の自硬
性を軽減し、加工性を高め、また、溶接による鋼材の硬
化を防いでいる。In other words, a small amount of Cr and 8! By making these coexist, the oxidation resistance of the steel material itself is improved and selective oxidation at the interface between the steel material and the aluminum film is suppressed. It also facilitates the diffusion of Al into the steel material, and the diffusion causes A e in the steel material.
An increase in f1 degree further increases oxidation resistance. Furthermore, by reducing the Cr content, the self-hardening of the steel material itself is reduced, workability is improved, and hardening of the steel material due to welding is prevented.
以下本発明をさらに具体的に説明する。 The present invention will be explained in more detail below.
本発明の対象となる鋼材、例えば鋼板は、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鋼片とし、これを熱間圧延し、
酸洗し、冷間圧延した後、焼鈍することにより製造され
る。Steel materials, such as steel plates, which are the object of the present invention, are produced by melting molten steel in a normal melting furnace such as a converter or electric furnace and turning it into steel billets through an ingot-making/blowing method or a continuous casting method. Rolled,
Manufactured by pickling, cold rolling, and annealing.
そしてこの銅板に対し、真空蒸着法あるいは溶融メッキ
法、等によりアルミニウムを被覆してアルミメッキ鋼板
が得られる。Then, this copper plate is coated with aluminum by a vacuum evaporation method, a hot-dip plating method, or the like to obtain an aluminized steel plate.
本発明に係るアルミメッキ鋼板の鋼成分は、アルミニウ
ムメッキ後の鋼板に及ぼす作用効果を検討した結果、定
めたものである。以下に各化学成分の効果及び含有する
範囲について説明する。The steel components of the aluminized steel sheet according to the present invention were determined as a result of studying the effects on the steel sheet after aluminum plating. The effect of each chemical component and the range in which it is contained will be explained below.
まず、Ｃは、その含有量が増加すると鋼材が硬くなるの
で加工性が低下し、また綱のメッキ濡れ性を劣化せしめ
、不メツキあるいはピンホール発生の原因となるので、
少ない方が望ましい。本発明では、通常の転炉、および
真空脱ガス設備を利用した軽処理を含む脱炭法で容易に
低下させうる上限、下限値を範囲とした。First of all, as C content increases, the steel becomes harder, reducing workability, and also deteriorating the plating wettability of the steel, causing defects or pinholes.
Less is better. In the present invention, the upper and lower limit values are set as ranges that can be easily lowered by a decarburization method including light treatment using a normal converter and vacuum degassing equipment.
Ｍｎはアルミニウムメッキ浴における鋼板の濡れ性を改
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に寄与しうるが、加工性の点からは
少ないことが好ましい。そこで加工性の向上のためＭｎ
は極力少なくするとしても、通常の製鋼法ではＭｎが０
．１％未満の鋼を得ることは困難であり、またＭｎが１
．５％を越えると加工性を害するので本発明範囲とした
。Mn improves the wettability of the steel sheet in an aluminum plating bath, prevents the occurrence of microscopic unmet parts, and can contribute to the corrosion resistance and heat resistance of the plated steel sheet, but from the viewpoint of workability, it is preferable to have a small amount. . Therefore, in order to improve workability, Mn
Even if Mn is reduced as much as possible, in normal steelmaking methods, Mn is 0.
．． It is difficult to obtain steel with less than 1% Mn, and
．． If it exceeds 5%, processability will be impaired, so it is included in the range of the present invention.
Ｃｒは、鋼材の耐酸化性を向上させ、Ａｊｌ’被膜と鋼
材の界面での鋼材の選択酸化を防ぐと同時に、高温加熱
時のＡｌ被膜から鋼材へのへβ拡散を容易化し、鋼のＡ
ｅ ：ａ度を増加させることによって、耐酸化性をよ
り向上させる作用がある。かかる効果はＣｒが２％以上
で現れる。Ｃｒ９度が高くなりすぎると、材質の硬化を
招くので、９％を上限とする。すなわち本発明における
Ｃｒの範囲は２〜９％とした。Cr improves the oxidation resistance of steel, prevents selective oxidation of the steel at the interface between the Ajl' film and the steel, and at the same time facilitates β diffusion from the Al film to the steel during high-temperature heating, increasing the A of the steel.
e: Increasing the a degree has the effect of further improving oxidation resistance. Such an effect appears when Cr is 2% or more. If the Cr9 degree becomes too high, the material will harden, so the upper limit is set at 9%. That is, the range of Cr in the present invention was set to 2 to 9%.
Ａｌは、Ｃｒ含有鋼の自硬性を軽減し、加工性および溶
接性を向上させる。また、鋼材の耐酸化性を向上させ、
Ａｌ被膜と鋼材の界面での綱材の選択酸化を防ぐもので
ある。そのためには八ｌが０．３％以上必要であるが、
他方、Ａｌ濃度が３％を越えると鋼材の靭性の低下をも
たらすので好ましくない。Al reduces the self-hardening of Cr-containing steel and improves workability and weldability. It also improves the oxidation resistance of steel,
This prevents selective oxidation of the steel material at the interface between the Al coating and the steel material. For this purpose, 8l is required at 0.3% or more,
On the other hand, if the Al concentration exceeds 3%, the toughness of the steel material will decrease, which is not preferable.
本発明では、上記組成の鋼板上にＡｊ２被膜を形成させ
るがその被覆法としては、通常用いられる溶融アルミニ
ウムメッキ法、及び真空蒸着法を採用できる。In the present invention, an Aj2 film is formed on a steel plate having the above composition, and the coating method may be a commonly used hot-dip aluminum plating method or a vacuum evaporation method.
なお、皮膜をＡｌ又は１０％Ｓｔを含有するＡｆ金合金
する理由は以下の通りである。即ち、ＡＡ −Ｓｉ合金
はＡｌに比較して耐食性が若干低下するが、溶融メッキ
法においてはＳｉを１０％まで加える事によって融点が
下がる事によるコスト低減効果がある。The reason why the film is made of Al or an Af gold alloy containing 10% St is as follows. That is, although the corrosion resistance of the AA-Si alloy is slightly lower than that of Al, in the hot-dip plating method, by adding up to 10% Si, the melting point is lowered, resulting in a cost reduction effect.
次に実施例を示す。 Next, examples will be shown.
後述する各実施例で使用した試験材は、いずれも熱間圧
延、酸洗、冷間圧延処理をした後、６００〜７００℃で
焼鈍して得られる鋼板上に、真空蒸着法によって３０μ
の厚さのアルミ被覆を施したものを用いた。この試験材
及び比較のための材料に対し、耐食、耐酸化性、ならび
に加工性の目安として伸びおよび被メッキ材の硬度を測
定した。The test materials used in each of the examples described below were coated onto steel plates obtained by hot rolling, pickling, and cold rolling, and then annealing at 600 to 700°C.
An aluminum coating with a thickness of . For this test material and materials for comparison, the corrosion resistance, oxidation resistance, and elongation and hardness of the plated material were measured as indicators of workability.
試験条件は、浸漬試験（耐食性試験）では、ＮａＣ１４
０ｇ／ ｌ 、 ＭｇＣＲｄｏｇ／ Ｉｔの組成の水溶
液中に上記各試験材を３０日間浸漬したときの重量減を
、また、耐酸化性試験では、試験材を７００℃で１０時
間、大気中で加熱したときの表面状態を観察し２．さび
発生を調べた。The test conditions are NaC14 in the immersion test (corrosion resistance test).
The weight loss when each of the above test materials was immersed for 30 days in an aqueous solution with a composition of 0g/l, MgCRdog/It, and in the oxidation resistance test, the test materials were heated at 700°C for 10 hours in the air. Observe the surface condition when 2. The occurrence of rust was investigated.
その評価は、○はさびが見られないもの、×はさびが見
られるものとする。総合評価としては、浸漬Ｍｆｆｉ１
５ｇ／ｍ２以下、耐酸化性良好（○）で、伸びが２５％
以上、硬度２００以下のものを良好（○）、それ以外を
不良（Ｘ）とした。For the evaluation, ○ indicates that no rust is observed, and × indicates that rust is observed. As a comprehensive evaluation, immersion Mffi1
5g/m2 or less, good oxidation resistance (○), elongation 25%
In the above, those with hardness of 200 or less were evaluated as good (○), and the others were evaluated as poor (X).
結果を第１表に示す。The results are shown in Table 1.
第１表において、実施例の化学成分量はいずれも本発明
範囲に入っており、総合評価は良好（○）であるのに対
し、比較例５ではＣｒ、Ａｌが、同６ではＣ，Ｃｒが、
同７ではＭｎ、Ａｊ！が、同８ではり。In Table 1, the chemical component amounts of Examples are all within the range of the present invention, and the overall evaluation is good (○), whereas Comparative Example 5 contains Cr and Al, and Comparative Example 6 contains C and Cr. but,
In the same 7th, Mn, Aj! However, it was 8 years ago.
Ｃｒ、Ａｌがそれぞれ本発明範囲から逸脱しており、従
って総合評価はいずれも不良（×）である。Cr and Al each deviate from the scope of the present invention, so the overall evaluation is poor (x).
さらに、耐熱性におよぼずＣｒとＡｌの温度の影響を調
べた。ここで耐熱性は、室温〜７００℃の熱サイクルを
１０回繰り返したときの被覆の剥離率で表示すると、第
１図のようになった。Furthermore, the influence of temperature on Cr and Al on heat resistance was investigated. Here, the heat resistance is expressed as the peeling rate of the coating when thermal cycles from room temperature to 700° C. are repeated 10 times, as shown in FIG. 1.
同図より、Ｃｒ、Ａｎともにその濃度が増大するに伴っ
て、剥離率が低下することが判る。しかしＣｒ？Ｍ度の
温度の増加は前述したように、自硬性が、高まり、成形
性を害する。From the figure, it can be seen that as the concentrations of both Cr and An increase, the peeling rate decreases. But Cr? As mentioned above, an increase in temperature of M degrees increases self-hardening and impairs moldability.
したがって、その点を考慮するとＣｒ、 Ａｌは本発明
の範囲内が最適であることもまた明らかとなった。Therefore, in consideration of this point, it has also become clear that Cr and Al are optimally within the scope of the present invention.
被覆材としてへβ−５ｔ合金を用いた場合について、第
１表と同様の浸漬試験を行なった結果を第２表に示す、
第２表かられかるように、Ｓｉ量が増大すると耐食性が
劣化するが、１０％Ｓｉまでは実用的に使用可能である
。Table 2 shows the results of the same immersion test as in Table 1 for the case where β-5t alloy was used as the coating material.
As can be seen from Table 2, as the amount of Si increases, the corrosion resistance deteriorates, but up to 10% Si can be used practically.
第２表
〔発明の効果〕
以上の通り、本発明によれば、耐熱性、耐食性が良好で
あることは勿論、加工性、溶接性が向上し、そのアルミ
メッキ鋼板の用途も大幅に拡大させうるちのである。Table 2 [Effects of the Invention] As described above, the present invention not only has good heat resistance and corrosion resistance, but also improves workability and weldability, and greatly expands the applications of the aluminized steel sheet. It's Uruchino.
第１図はＣｒ、＾ｌの濃度と剥離率との関係を示す図で
ある。
第１図
ＡＬ漠皮FIG. 1 is a diagram showing the relationship between the concentration of Cr and ^l and the peeling rate. Figure 1 AL desert skin
Claims (1)
、Ｃｒ２〜９％、Ａｌ０．３〜３％を含有し、残部がＦ
ｅおよび不可避的に混入する不純物からなる鋼板に、ア
ルミニウムまたは１０％以下のＳｉを含有するアルミニ
ウムを、真空蒸着法あるいは溶融メッキ法により被覆し
たことを特徴とする耐熱性に優れたアルミメッキ鋼板。(1) C0.001-0.1%, Mn0.1-1.5%
, contains 2-9% Cr, 0.3-3% Al, and the balance is F.
An aluminized steel sheet with excellent heat resistance, characterized in that a steel sheet consisting of E and impurities inevitably mixed therein is coated with aluminum or aluminum containing 10% or less of Si by a vacuum deposition method or a hot-dip plating method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4706687A JPS63213658A (en) | 1987-03-02 | 1987-03-02 | Aluminum-plated steel sheet excellent in heat resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4706687A JPS63213658A (en) | 1987-03-02 | 1987-03-02 | Aluminum-plated steel sheet excellent in heat resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63213658A true JPS63213658A (en) | 1988-09-06 |
Family
ID=12764783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4706687A Pending JPS63213658A (en) | 1987-03-02 | 1987-03-02 | Aluminum-plated steel sheet excellent in heat resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63213658A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04147965A (en) * | 1990-10-08 | 1992-05-21 | Kobe Steel Ltd | Production of al-plated steel material by vapor deposition |
| JP2001271136A (en) * | 2000-03-27 | 2001-10-02 | Nisshin Steel Co Ltd | Hot dip aluminized steel sheet excellent in high temperature oxidation resistance and its production method |
-
1987
- 1987-03-02 JP JP4706687A patent/JPS63213658A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04147965A (en) * | 1990-10-08 | 1992-05-21 | Kobe Steel Ltd | Production of al-plated steel material by vapor deposition |
| JP2001271136A (en) * | 2000-03-27 | 2001-10-02 | Nisshin Steel Co Ltd | Hot dip aluminized steel sheet excellent in high temperature oxidation resistance and its production method |
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