JPH0572465B2 - - Google Patents
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- Publication number
- JPH0572465B2 JPH0572465B2 JP63314922A JP31492288A JPH0572465B2 JP H0572465 B2 JPH0572465 B2 JP H0572465B2 JP 63314922 A JP63314922 A JP 63314922A JP 31492288 A JP31492288 A JP 31492288A JP H0572465 B2 JPH0572465 B2 JP H0572465B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- aluminized
- temperature
- steel sheet
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 238000005260 corrosion Methods 0.000 claims description 16
- 230000007797 corrosion Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000010960 cold rolled steel Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011651 chromium Substances 0.000 description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000007747 plating Methods 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 238000005269 aluminizing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910000680 Aluminized steel Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 235000002639 sodium chloride Nutrition 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- GVEHJMMRQRRJPM-UHFFFAOYSA-N chromium(2+);methanidylidynechromium Chemical compound [Cr+2].[Cr]#[C-].[Cr]#[C-] GVEHJMMRQRRJPM-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Description
産業上の利用分野
本発明は、不メツキのない高耐食性アルミメツ
キCr含有鋼板の製造法に関するものである。
従来の技術
鋼板にアルミメツキしたアルミメツキ鋼板は、
高温域で耐熱性・耐酸化性に優れ、常温で耐食性
に優れていることから、防火壁建築材料、エキゾ
ーストパイプやマフラー等の排気系自動車用部品
材料、ストーブやパン焼き器等の家庭用器具耐熱
部品材料等巾広い分野に亘つて使用されている。
加工用冷延鋼板にアルミメツキを施したアルミ
メツキ冷延鋼板が従来から使用されていたが、さ
らに高い500℃以上の温度で高温強度と共に耐熱
性と耐酸化性に優れ、北米等諸国で使用されてい
る凍結防止用岩塩散布に対する塩害耐食性にも優
れたアルミメツキCr含有鋼板が開発されている。
例えば特開昭60−262950号公報のように、「鋼
板の加工性を付与するために、Tiと耐食性の向
上を図るCrを含有する鋼板の、Cr酸化物の生成
を防止してメツキ濡れ性を向上するNiメツキを
施した溶融アルミメツキ鋼板」、また特開昭61−
147865号公報や特開昭61−147866号公報のよう
に、「Cr含有鋼板にSi−Ni−Al系溶融メツキを施
した耐高温酸化性、耐高温ガス腐食性及び耐塩害
腐食性に優れた溶融アルミメツキ鋼板」等、多く
の種類のアルミメツキCr含有鋼板が開発され、
その鋼板の諸特性は優れたものである。
ところが最近、自動車用排気系材料は、車体防
錆のの表面錆５年−穴明10年の対応に呼応して、
より長寿命化が要求され、また家電材料や建築材
料の高機能化材料への要求と共に長期間耐食性を
保証したアルミメツキ鋼板の供給が要求されてい
る。
しかしながら、このような要求に対して未だ満
足すべき溶融メツキCr含有鋼板が提供されてい
ない。この問題は溶融アルミメツキの不メツキに
あつた。これまでの溶融アルミメツキ法は、特公
昭56−11310号公報に「冷間圧延鋼の焼鈍に際し
ては、酸化炉及び還元炉にて再結晶温度以上に加
熱した後、均熱帯で均熱を行なうと共に、表面の
ガスクリーニングを行ない、しかる後に該鋼帯を
溶融アルミ浴に導く」とあり、あるいは、特開昭
60−13057号公報の実施例１に「冷延工程を経て、
1.0mm厚の冷延板とし、その後に焼鈍してから素
材表面の酸化スケールの除去を行なつた後、脱脂
後、通常のメツキ工程に従つて素材を溶融Al浴
に浸漬する。」とあるように、鋼板の表面に付着
した酸化膜を除去してアルミメツキする方法であ
るため、Cr含有冷延板をアルミメツキする場合、
鋼中のCrが酸化されてしまうと、難還元性酸化
物（CrO3等）が生成される。
この酸化物が生成すると還元炉は還元不可能
で、その部分の反応性が著しく低下し不メツキが
発生する為、長期間安定したCr含有アルミメツ
キ鋼板を得ることが困難であつた。この為、無酸
化炉の板温を低くして鋼中Crの酸化防止を図つ
ていたが、この方法では、鋼中Crの酸化防止は
不十分であり、不メツキのないメツキ鋼板の製造
は不可能であつた。
またNiプレメツキにより、鋼中Crの酸化防止
を図つた場合、ストリツプ表面全体をNiで被覆
する為には、Ni付着量は片面５ｇ／m2以上は必
要であり、Ni付着量が多くなると、メツキ性及
び耐食性に悪影響を及ぼすことが概念される。こ
の為、Niプレメツキ量は片面１ｇ／m2以下とし
ているが、この量ではストリツプを完全に被覆で
きないので、この方法だけでは、不メツキ完全防
止には不十分であつた。
この含Cr鋼のアルミメツキのポイントは、鋼
中のCrの酸化をどのようにして防止するかとい
う点であると本発明者らは推察している。
発明が解決しようとする課題
本発明はこのような推論から、メツキされる鋼
板の界面を改質して、不メツキ部分のない長期間
耐食性の優れたアルミメツキCr含有鋼板を安定
して製造することを目的とする。
課題を解決するための手段
本発明者は多くの実験を試みた結果Cr含有冷
延鋼板を弱酸化性雰囲気炉で高温に加熱すること
により、ストリツプ中のFeが選択的に酸化され、
易還元性の鉄系酸化物が生成し、Crが酸化され
るのを防止し、この酸化膜を還元炉にて還元する
ことにより、反応性に富んだFe−Crの界面が得
られることを知見した。本発明は、この知見に基
づいて構成したものである。
その要旨はCr：１〜25％を含有する冷間圧延
鋼板を、加熱バーナーの空気比が0.95〜1.5の弱
酸化性雰囲気炉で、温度660℃〜830℃に加熱した
後、還元性雰囲気炉で温度750℃〜900℃に加熱
し、続いて冷却しながら溶融アルミメツキするア
ルミメツキCr鋼板の製造法である。
以下、本発明について詳細に説明する。
転炉、電気炉など通常の溶解炉で溶製された溶
鋼を、造塊または連続鋳造を経て製造された鋼片
を、さらに熱間圧延と冷間圧延を経てCr：１〜
25％を含有するCr含有冷間圧延鋼板を製造する。
Crは鋼中に含有されて鋼板自体の耐食性を向
上させるだけでなく、アルミメツキ後は自動車排
ガス凝縮中では、メツキされたアルミニウムの犠
牲防食作用を発揮させる有効な成分である。しか
しながら１％未満の少ないCr含有量では、その
ような効果を得るには不十分で、また25％を越え
る過剰な含有量は耐熱性、耐食性の効果が過飽和
となり、鋼板の加工性も劣化し、各種の用途の製
品に使用することができない。したがつて本発明
においては、１〜25％のCrを含有する鋼板を使
用する。
さらにTi、Nb、Niなど強化元素、加工性向上
元素の少量を含有させてもよい。
このようにして製造されたCr含有冷延鋼板は、
必要によつては酸洗や脱脂など表面清浄化処理、
あるいはNiプレメツキやFeプレメツキ等鋼板と
メツキ金属の密着性を高める下地処理を施した
後、加熱バーナーの空気比0.95〜1.50の弱酸化性
雰囲気で、板の温度が660℃〜830℃に加熱する。
弱酸化性雰囲気で高温域まで加熱されたCr含有
鋼板は、その表面には、易還元性の鉄系酸化膜が
緻密に生成しており、難還元性のCr系の酸化膜
はほとんど生成していない。
このような効果は所定の空気比と板温により得
られるものであつて、空気比が0.95以下では鉄系
酸化膜を緻密に生成させるには「０」量が不足し
ている為、鉄系酸化膜が緻密に生成する前に鋼中
Crの酸化も起り、Cr系酸化膜を生成する為不メ
ツキが発生しやすくなる。反対に空気比が1.5を
越えると、生成する酸化膜が著しく厚くなり、還
元炉では還元困難である。
また、その板温が660℃未満の低い温度では、
難還元性のCr系酸化膜を生成し、アルミメツキ
金属との濡れ性を劣化して、アルミメツキ金属の
不メツキ部を多く発生し易くする。その反面830
℃を越える温度では生成する酸化膜が厚くなり、
還元が困難になるだけではなく、再結晶温度域に
入つてくるので、材質劣化が概念される。
すなわち上記のような空気比と加熱板温とが調
和のとれた範囲で加熱することによつて、易還元
性の鉄系酸化膜を緻密に生成し、Crの酸化を極
力抑制した界面になつている。
この後、還元雰囲気炉で、750℃〜900℃に昇温
して結晶化組織を呈する軟化焼純を施し、同時に
鋼板表面に生成した鉄系酸化膜を還元し、表面を
活性化する。この場合、板温が750℃未満の低い
温度では未再結晶組織を呈して、各種の形状に加
工する際に割れを生じる。また反対に900℃を越
える高い温度では鋼の結晶粒が粗大化して各種の
複雑な形状に加工する際、割れを発生し、また耐
食性を劣化する傾向にある。
しかして上記の熱処理を受けたCr含有鋼板は、
直ちに冷却を開始しながら溶融アルミメツキ浴を
通過して所定のメツキ付着量に調整されて製品化
される。この場合の冷却速度は冷却中に生成する
クロムカーバイトの析出による耐食性の劣化を防
止するために速い程好ましく、またアルミメツキ
浴についても、アルミ、アルミ−シリコン合金な
ど各種のアルミ系メツキ浴が使用される。
しかして製造されたアルミメツキCr含有鋼板
は、不メツキのない耐食性の優れた鋼板となる。
次に本発明の実施例について説明する。
第１表は各種成分含有量の異なるCr含有冷延
板を、温度、空気比を変化させて、溶融アルミメ
ツキしたときのメツキ外観を示したものである。
発明の効果
その結果、本発明法でアルミメツキしたCr含
有鋼板は、不メツキの発生がほとんどない良好な
外観であり、本発明から逸脱した比較材は不メツ
キの多い外観であつた。
INDUSTRIAL APPLICATION FIELD The present invention relates to a method for producing a highly corrosion-resistant aluminized Cr-containing steel plate without any defects. Conventional technology Aluminized steel sheets, which are aluminized steel sheets, are
It has excellent heat resistance and oxidation resistance at high temperatures, and excellent corrosion resistance at room temperature, so it can be used as firewall construction materials, exhaust system automobile parts materials such as exhaust pipes and mufflers, and heat resistant household appliances such as stoves and bread makers. It is used in a wide range of fields including parts and materials. Aluminum-plated cold-rolled steel sheets, which are aluminized cold-rolled steel sheets for processing, have been used for a long time, but they have superior heat resistance and oxidation resistance as well as high-temperature strength at temperatures above 500℃, and are now used in North America and other countries. An aluminium-plated Cr-containing steel sheet has been developed that has excellent salt damage corrosion resistance when sprayed with antifreeze rock salt. For example, as in Japanese Patent Application Laid-Open No. 60-262950, ``In order to improve workability of steel sheets, it is possible to improve plating wettability by preventing the formation of Cr oxides in steel sheets containing Ti and Cr, which improves corrosion resistance.'' ``Hot-dipped aluminized steel sheet with Ni plating to improve
No. 147865 and Japanese Patent Application Laid-open No. 147866/1986, ``Si-Ni-Al hot-dipped plated steel sheet with excellent high-temperature oxidation resistance, high-temperature gas corrosion resistance, and salt corrosion resistance Many types of aluminized Cr-containing steel sheets have been developed, such as ``molten aluminized steel sheets.''
The properties of the steel plate are excellent. However, recently, automobile exhaust system materials have been developed in response to the need for surface rust prevention for car bodies, which takes 5 years to 10 years.
There is a demand for longer service life, and along with a demand for highly functional materials for home appliances and building materials, there is a demand for the supply of aluminized steel sheets that guarantee long-term corrosion resistance. However, a hot-dip galvanized Cr-containing steel sheet that satisfies these demands has not yet been provided. The problem involved poor plating of molten aluminium. The conventional molten aluminizing method is described in Japanese Patent Publication No. 11310/1983, which states, ``When annealing cold rolled steel, it is heated to above the recrystallization temperature in an oxidation furnace and a reduction furnace, and then soaked in a soaking zone. , gas cleaning the surface, and then introducing the steel strip into a molten aluminum bath.''
Example 1 of Publication No. 60-13057 states, “Through the cold rolling process,
A cold-rolled sheet with a thickness of 1.0 mm is made, then annealed, the oxidized scale on the surface of the material is removed, and after degreasing, the material is immersed in a molten Al bath according to the usual plating process. '', this method removes the oxide film attached to the surface of the steel sheet before aluminizing it, so when aluminizing a cold-rolled sheet containing Cr,
When Cr in steel is oxidized, refractory oxides (CrO 3 , etc.) are generated. When this oxide is generated, the reduction furnace cannot reduce the oxide, and the reactivity of the area is significantly reduced and unplatedness occurs, making it difficult to obtain a Cr-containing aluminized steel sheet that is stable for a long period of time. For this reason, attempts have been made to prevent the oxidation of Cr in the steel by lowering the plate temperature in the non-oxidizing furnace, but this method is insufficient to prevent the oxidation of Cr in the steel, and produces plated steel sheets with no defects. was impossible. In addition, when pre-plating with Ni is used to prevent oxidation of Cr in steel, in order to cover the entire strip surface with Ni, the amount of Ni deposited on one side must be 5 g/m2 or more, and as the amount of Ni deposited increases, It is believed that this has an adverse effect on plating properties and corrosion resistance. For this reason, the amount of Ni pre-plating is limited to 1 g/m 2 or less on one side, but since this amount does not completely cover the strip, this method alone was insufficient to completely prevent unplatedness. The present inventors conjecture that the point of aluminizing this Cr-containing steel is how to prevent oxidation of Cr in the steel. Problems to be Solved by the Invention Based on this reasoning, the present invention aims to stably produce an aluminized Cr-containing steel plate with no unplated parts and excellent long-term corrosion resistance by modifying the interface of the plated steel plate. With the goal. Means for Solving the Problems The present inventor has conducted many experiments and found that by heating a Cr-containing cold-rolled steel sheet to a high temperature in a mildly oxidizing atmosphere furnace, Fe in the strip is selectively oxidized.
It has been shown that a highly reactive Fe-Cr interface can be obtained by generating easily reducible iron-based oxides, preventing Cr from being oxidized, and reducing this oxide film in a reduction furnace. I found out. The present invention is constructed based on this knowledge. The gist is that a cold-rolled steel sheet containing 1 to 25% Cr is heated to a temperature of 660°C to 830°C in a mildly oxidizing atmosphere furnace with a heating burner air ratio of 0.95 to 1.5, and then heated in a reducing atmosphere furnace. This is a manufacturing method for aluminized Cr steel sheets, in which the steel is heated to a temperature of 750°C to 900°C and then molten aluminized while cooling. The present invention will be explained in detail below. Molten steel melted in a normal melting furnace such as a converter or electric furnace is processed through ingot making or continuous casting, and then hot-rolled and cold-rolled to produce Cr: 1~
A cold rolled steel sheet containing 25% Cr is produced. Cr is contained in steel and not only improves the corrosion resistance of the steel sheet itself, but also is an effective component that exerts a sacrificial anti-corrosion effect on plated aluminum during condensation of automobile exhaust gas after aluminizing. However, a low Cr content of less than 1% is insufficient to obtain such an effect, and an excessive content of more than 25% will oversaturate the effects of heat resistance and corrosion resistance, and the workability of the steel sheet will also deteriorate. , cannot be used in products for various purposes. Therefore, in the present invention, a steel plate containing 1 to 25% Cr is used. Furthermore, a small amount of a reinforcing element such as Ti, Nb, or Ni or a workability improving element may be included. The Cr-containing cold-rolled steel sheet manufactured in this way is
If necessary, surface cleaning treatments such as pickling and degreasing,
Alternatively, after applying a surface treatment such as Ni pre-plating or Fe pre-plating to increase the adhesion between the steel plate and the plated metal, the plate is heated to a temperature of 660°C to 830°C in a slightly oxidizing atmosphere with an air ratio of 0.95 to 1.50 using a heating burner. .
A Cr-containing steel sheet heated to a high temperature in a weakly oxidizing atmosphere has a dense, easily reducible iron-based oxide film formed on its surface, and almost no reducible Cr-based oxide film. Not yet. Such an effect is obtained by a predetermined air ratio and plate temperature, and if the air ratio is less than 0.95, the amount of "0" is insufficient to form a dense iron-based oxide film. in the steel before a dense oxide film forms.
Oxidation of Cr also occurs, producing a Cr-based oxide film, which makes unplating more likely. On the other hand, if the air ratio exceeds 1.5, the resulting oxide film becomes extremely thick, making it difficult to reduce it in a reduction furnace. In addition, when the plate temperature is lower than 660℃,
It generates a Cr-based oxide film that is difficult to reduce, deteriorates wettability with aluminized metal, and makes it easier to have many unplated areas in aluminized metal. On the other hand, 830
At temperatures exceeding ℃, the oxide film that forms becomes thicker,
Not only does reduction become difficult, but it also enters the recrystallization temperature range, so material deterioration is considered. In other words, by heating in a range where the air ratio and heating plate temperature are in harmony as described above, an easily reducible iron-based oxide film is formed densely, resulting in an interface that suppresses Cr oxidation as much as possible. ing. Thereafter, in a reducing atmosphere furnace, the temperature is raised to 750° C. to 900° C. to perform softening annealing to create a crystallized structure, and at the same time, the iron-based oxide film formed on the surface of the steel sheet is reduced and the surface is activated. In this case, when the plate temperature is low, below 750°C, it exhibits an unrecrystallized structure, which causes cracks when processed into various shapes. On the other hand, at high temperatures exceeding 900°C, the crystal grains of steel tend to become coarser, causing cracks to occur when processed into various complex shapes, and to deteriorate corrosion resistance. However, the Cr-containing steel sheet subjected to the above heat treatment,
Immediately, the product is passed through a molten aluminizing bath while cooling is started, and the amount of plating is adjusted to a predetermined amount, and the product is manufactured. In this case, the faster the cooling rate is, the better in order to prevent deterioration of corrosion resistance due to the precipitation of chromium carbide generated during cooling.As for the aluminizing bath, various aluminum-based plating baths such as aluminum and aluminum-silicon alloys are used. be done. The aluminized Cr-containing steel sheet thus produced is a steel sheet with no defects and excellent corrosion resistance. Next, examples of the present invention will be described. Table 1 shows the plating appearance when Cr-containing cold-rolled sheets having different contents of various components were molten aluminized at varying temperatures and air ratios. Effects of the Invention As a result, the Cr-containing steel plate aluminized using the method of the present invention had a good appearance with almost no occurrence of defects, while the comparative material deviating from the present invention had an appearance with many defects.
【表】【table】
Claims (1)
加熱バーナーの空気比0.95超〜1.5の弱酸化性雰
囲気炉で温度600℃〜830℃に加熱した後、還元性
雰囲気炉で温度750℃〜900℃に加熱し、続いて冷
却しながら溶融アルミメツキすることを特徴とす
る不メツキのない高耐食性アルミメツキCr鋼板
の製造法。1 Cold rolled steel plate containing 1 to 25% Cr,
After heating to a temperature of 600℃ to 830℃ in a mildly oxidizing atmosphere furnace with a heating burner air ratio of over 0.95 to 1.5, heating to a temperature of 750℃ to 900℃ in a reducing atmosphere furnace, followed by molten aluminization while cooling. A method for manufacturing a highly corrosion-resistant aluminized Cr steel plate without defects, characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31492288A JPH02163357A (en) | 1988-12-15 | 1988-12-15 | Production of completely aluminized cr-containing steel sheet having high corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31492288A JPH02163357A (en) | 1988-12-15 | 1988-12-15 | Production of completely aluminized cr-containing steel sheet having high corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02163357A JPH02163357A (en) | 1990-06-22 |
| JPH0572465B2 true JPH0572465B2 (en) | 1993-10-12 |
Family
ID=18059260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31492288A Granted JPH02163357A (en) | 1988-12-15 | 1988-12-15 | Production of completely aluminized cr-containing steel sheet having high corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02163357A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2664617B1 (en) * | 1990-07-16 | 1993-08-06 | Lorraine Laminage | PROCESS FOR COATING ALUMINUM BY HOT TEMPERING OF A STEEL STRIP AND STEEL STRIP OBTAINED BY THIS PROCESS. |
| US5175026A (en) * | 1991-07-16 | 1992-12-29 | Wheeling-Nisshin, Inc. | Method for hot-dip coating chromium-bearing steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649989A (en) * | 1979-09-29 | 1981-05-06 | Hitachi Ltd | Nuclear reactor operation method |
-
1988
- 1988-12-15 JP JP31492288A patent/JPH02163357A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649989A (en) * | 1979-09-29 | 1981-05-06 | Hitachi Ltd | Nuclear reactor operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02163357A (en) | 1990-06-22 |
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