JPH049288A - Production of aluminum clad steel plate having excellent shearing strength - Google Patents
Production of aluminum clad steel plate having excellent shearing strengthInfo
- Publication number
- JPH049288A JPH049288A JP11097390A JP11097390A JPH049288A JP H049288 A JPH049288 A JP H049288A JP 11097390 A JP11097390 A JP 11097390A JP 11097390 A JP11097390 A JP 11097390A JP H049288 A JPH049288 A JP H049288A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- steel plate
- rolling
- steel
- film
- 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 38
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000010008 shearing Methods 0.000 title 1
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 12
- 239000010452 phosphate Substances 0.000 claims abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000002648 laminated material Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 241001481828 Glyptocephalus cynoglossus Species 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 238000003475 lamination Methods 0.000 claims 1
- 239000010953 base metal Substances 0.000 abstract description 10
- 238000005304 joining Methods 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 238000005253 cladding Methods 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000002788 crimping Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101150110330 CRAT gene Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
（産業上の利用分野）
本発明は、圧延接合法により、アルミクラッド鋼板を製
造する方法に関するものである。
（従来の技術及び解決しようとする課題）鋼板（母材）
にアルミニウム又はアルミニウム合金板（合わせ材）を
クラッドした。いわゆるアルミクラッド鋼板は、機械的
性質、耐蝕性、電気的特性等々の複合機能を有する金属
材料として、各種方面に利用されつつあり、従来より、
爆薬の爆発エネルギーを利用して接着する爆発圧着法、
或いは圧延により圧着接合する圧延接合法等により製造
されている。
しかしながら、爆発圧着法は、製造コストが高く、低廉
にアルミクラッド鋼板を製造するには不適当である。一
方、圧延接合法は、低廉なりラッド鋼板の製造に適して
いる。
圧延接合法には、合わせ材と鋼板を重ね合わせて加熱し
熱間圧延する方法と、加熱せずに冷間圧延する方法があ
る。
一般に、板厚８ｍｍ以上のアルミクラッド鋼板を圧延接
合により製造する際には、熱間圧延による方法が採用さ
れているが、この場合、母材接合予定面に酸化物が生成
し、母材と合わせ材の接合性を劣化させてしまう。
このため、酸化物の生成を防止する手段として、特開昭
６４−５６８３号のように合わせ材を高温に加熱する方
法や、母材面に溶射を施す方法などが提案されている。
しかしながら、前者の場合、合わせ材のみを加熱するの
で、加熱炉から抽出後に合わせ材の温度低下が懸念され
るほか、圧延直前に母材と合わせ材を組み合わせる必要
があり、作業性が非常に悪いという問題がある。
また、後者の場合は、圧延前の事前処理が加わり、製造
工程が増えることになるばかりか、製造コストが非常に
高いという問題がある。その上、接合性に関しても、比
較的良好ではあるものの、充分に満足できるとは言い難
かった。
本発明は、上記従来技術における問題点を解決するため
になされたものであって、せん断強度の優れたアルミク
ラッド鋼板を工業的に安価に製造できる方法を提供する
ことを目的とするものである。
（課題を解決するための手段）
前述目的を達成するため、本発明者等は、低廉で簡便な
処理方法で鋼板の酸化防止効果が高く。
有害な脆化層が形成されない保護被膜を探索し、加えて
接合強度の高い製造条件を見い呂す入く鋭意研究を重ね
た結果、高位に安定しだせん断強度を有するアルミクラ
ッド鋼板の製造方法を見い出したものである。
すなわち、本発明は、アルミニウム又はアルミニウム合
金を合わせ材とし、鋼板を母材としたアルミクラッド鋼
板をオープンサイドイッチ法により製造するに当たり、
研磨を施したｒ相接合予定面にりん酸又はりん酸塩水溶
液を塗布乾燥して被膜を形成し、この被膜上に、清浄に
した合わせ材を積層し、合わせ材と母材を固定した後、
加熱・圧延することを特徴とするせん断強度の優れたア
ルミクラット鋼板の製造方法を要旨とするものであり、
特に好ましい加熱・圧延条件として、加熱温度が２５０
℃以上、アルミニウムの溶融温度未満であり、少なくと
も１パスはアルミニウムの圧下率が１０％以上とするこ
とを特徴とするものである。
以下に本発明を更に詳細に説明する。
（作用）
まず、本発明においては、アルミクラット鋼板素材とし
て、表面にりん酸塩被膜を形成させた鋼板を使用するこ
とを特徴とするものであり、この被膜側にアルミニウム
板を重ねて２層構造のコンポジットにすることが重要で
ある。これにより。
鋼の新生面をりん酸塩被膜で保護するので、アルミニウ
ムと鋼が圧着するまでの間、鋼板表面の酸化が防止され
、圧延時、この被膜とアルミニウム板表面の酸化被膜は
塑性変形により破壊され、両者の新生面が接合すること
になるので、圧着が容易になるのである。
りん酸塩被膜の形成条件は特に制限されず、りん陛又は
りん酸塩水溶液を塗布乾燥して適宜厚さに形成される。
なお、母材の鋼板は、アルミクラッド鋼板に対する所望
の複合機能に応じ、適宜の材質、厚さのものを用いるこ
とができる。
また、合わせ材のアルミニウム板は、所望の複合機能に
応じ、純アルミニウム又は適宜成分組成のアルミニウム
合金、厚さのものを用いることができる。
研磨を施した鋼板接合予定面に上記りん酸塩被膜を形成
した後、清浄にした合わせ材を積層し、合わせ材と母材
を固定した後、加熱・圧延を行なう。
その際、圧延の際の加熱温度は、アルミニウムの溶融温
度未満にすることは当然であり、その温度範囲で適切な
加熱温度を選択する。この場合。
２５０℃未満では、アルミ−鋼の圧着に大きな圧下量が
必要となるため、圧延機の能力を超えることになるばか
りでなく、アルミニウム板に亀裂が生じる場合があり、
好ましくない。したがって、適切な加熱温度は２５０℃
以上、アルミニウムの溶融温度未満の範囲である。
また、圧下率は、本発明において特に重要な条件であり
、少なくとも１パスはアルミニウムの圧下率が１０％以
上にする必要がある。これは、アルミニウムの塑性流動
を利用し、アルミニウムと鋼の接合面に生じている薄い
酸化被膜を完全に崩壊せしめ、その直後に圧着させるた
めに必要不可欠な要素であるからである。圧下率が１０
％未満では接合強度が極端に低下するので避けるべきで
ある。
次に本発明の実施例を示す。
（実施例）
以下に示す明細の鋼板及びアルミニウム板を準備し、２
層構造のコンポジットを組み立て、加熱圧延を行い、ア
ルミタララド鋼板を製造した９びアルミニウム の
鋼板の材質：５Ｓ４１
鋼板のサイズ（鳳ｍ） ： ２０ｔ Ｘ３００ｗ Ｘ１
００ＯＱアルミニウム板の材質：工業用純アルミニウム
板（Ａ１０５０Ｐ）
得られた材料について、ＵＳＴ接合性とせん断強度を調
査した。
なお、ＵＳＴ接合性が全面接合で、且つせん断強度が６
、 Ｏｋｇｆ／ ａｍ”以上のものを合格、それ以外
のものを不合格とした。
以上の調査結果を第１表に併記する。
本発明例＆１〜４は、ＵＳＴ接合性は全面接合で、せん
断強度が６ 、 Ｏｋｇｆ／ ａｍ”以上の非常に優れ
た接合強度を有している。
一方、比較例＆５は、母材接合予定面の表面性状が研磨
ままの例−であり、ＵＳＴ接合性は全面接合であるが、
せん断強度は低い。
比較例＆６は、母材接合予定面の表面性状及び圧下率は
本発明範囲内であるが、加熱温度が２５０℃未満であり
、結果として全面非接合となった。
比較例ＮＱ７は、母材接合予定面の表面性状及び加熱温
度が本発明範囲内であるが、圧下率が１０％未満であり
、結果として全面接合せず、せん断強度も低い。
〃 のサイズ（ＩＩＩｍ） ： ５ｔ Ｘ３００ｗ
Ｘ７００Ｑ(Industrial Application Field) The present invention relates to a method of manufacturing an aluminum clad steel plate by a rolling joining method. (Conventional technology and issues to be solved) Steel plate (base material)
clad with aluminum or aluminum alloy plate (laminated material). So-called aluminum clad steel sheets are being used in various fields as metal materials with complex functions such as mechanical properties, corrosion resistance, and electrical properties.
Explosive crimping method uses the explosive energy of explosives to bond
Alternatively, they are manufactured by a rolling joining method, etc., in which pressure joining is performed by rolling. However, the explosive crimping method has a high manufacturing cost and is not suitable for manufacturing aluminum clad steel sheets at low cost. On the other hand, the rolling joining method is inexpensive and suitable for manufacturing rad steel plates. Roll joining methods include a method in which a laminated material and a steel plate are superimposed and heated and hot rolled, and a method in which they are cold rolled without heating. Generally, when manufacturing aluminum clad steel plates with a thickness of 8 mm or more by rolling joining, hot rolling is used, but in this case, oxides are generated on the surface where the base metal is to be joined, and the base metal This will deteriorate the bonding properties of the laminated materials. Therefore, as means for preventing the formation of oxides, a method of heating the laminated material to a high temperature as in JP-A No. 64-5683, a method of thermal spraying the surface of the base material, etc. have been proposed. However, in the former case, only the laminated material is heated, so there is a concern that the temperature of the laminated material may drop after extraction from the heating furnace, and it is necessary to combine the base material and the laminated material immediately before rolling, resulting in very poor workability. There is a problem. Moreover, in the latter case, there is a problem that not only the number of manufacturing steps is increased due to the addition of pre-treatment before rolling, but also that the manufacturing cost is extremely high. Furthermore, although the bondability was relatively good, it was difficult to say that it was fully satisfactory. The present invention has been made in order to solve the problems in the above-mentioned prior art, and aims to provide a method for industrially manufacturing aluminum clad steel sheets with excellent shear strength at low cost. . (Means for Solving the Problems) In order to achieve the above-mentioned object, the present inventors have provided a treatment method that is inexpensive and simple and has a high oxidation prevention effect on steel sheets. As a result of searching for a protective coating that does not form a harmful embrittlement layer, and conducting extensive research into manufacturing conditions that provide high bonding strength, we were able to manufacture aluminum-clad steel sheets with highly stable shear strength. We have found a way. That is, in manufacturing an aluminum clad steel plate using aluminum or an aluminum alloy as a laminated material and a steel plate as a base material by an open side switch method, the present invention provides the following steps:
Phosphoric acid or phosphate aqueous solution is applied to the polished surface to be joined in the r-phase and dried to form a film, and the cleaned laminated material is laminated on top of this film, and the laminated material and base material are fixed. ,
The gist is a method for manufacturing aluminum crat steel sheets with excellent shear strength, which is characterized by heating and rolling.
Particularly preferable heating and rolling conditions include a heating temperature of 250°C.
℃ or higher and lower than the melting temperature of aluminum, and the reduction rate of aluminum is 10% or higher in at least one pass. The present invention will be explained in more detail below. (Function) First, the present invention is characterized in that a steel plate with a phosphate coating formed on the surface is used as the aluminum-crat steel plate material, and an aluminum plate is stacked on the coating side to form two layers. It is important to have a composite structure. Due to this. Since the new surface of the steel is protected with a phosphate film, oxidation of the steel plate surface is prevented until the aluminum and steel are crimped together. During rolling, this film and the oxide film on the aluminum plate surface are destroyed by plastic deformation. Since the newly formed surfaces of the two are joined together, crimping becomes easier. The conditions for forming the phosphate film are not particularly limited, and phosphorus or a phosphate aqueous solution is coated and dried to form an appropriate thickness. Note that the base material steel plate may be made of an appropriate material and have an appropriate thickness depending on the desired composite function of the aluminum clad steel plate. Further, as the aluminum plate of the laminated material, pure aluminum or an aluminum alloy having an appropriate composition and thickness can be used depending on the desired composite function. After forming the phosphate film on the polished surface of the steel plates to be joined, the cleaned laminated material is laminated, the laminated material and the base material are fixed, and then heated and rolled. At that time, it is natural that the heating temperature during rolling should be lower than the melting temperature of aluminum, and an appropriate heating temperature is selected within that temperature range. in this case. If the temperature is less than 250°C, a large rolling reduction is required for aluminum-steel crimping, which not only exceeds the capacity of the rolling mill, but also may cause cracks in the aluminum plate.
Undesirable. Therefore, the appropriate heating temperature is 250℃
The above range is below the melting temperature of aluminum. Further, the rolling reduction ratio is a particularly important condition in the present invention, and it is necessary that the rolling reduction ratio of aluminum be 10% or more in at least one pass. This is because it is an indispensable element for completely collapsing the thin oxide film that has formed on the joint surface of aluminum and steel by utilizing the plastic flow of aluminum, and immediately crimping the aluminum and steel. Rolling ratio is 10
If it is less than %, the bonding strength will be extremely reduced and should be avoided. Next, examples of the present invention will be shown. (Example) Prepare steel plates and aluminum plates with the details shown below, and
Aluminium steel plate material: 5S41 Steel plate size (mm): 20t X300w X1
Material of 00OQ aluminum plate: Industrial pure aluminum plate (A1050P) The obtained material was investigated for UST bondability and shear strength. In addition, the UST bondability is full-surface bonding, and the shear strength is 6.
, Okgf/am” or higher, the test results were passed, and the other test results were rejected. It has an extremely excellent bonding strength of 6.0 kgf/am” or higher. On the other hand, Comparative Example &5 is an example in which the surface quality of the surface to be joined to the base metal is as polished, and the UST bondability is full-surface bonding.
Shear strength is low. In Comparative Example &6, the surface quality and rolling reduction of the surface to be joined to the base metals were within the range of the present invention, but the heating temperature was less than 250°C, resulting in non-joining on the entire surface. In Comparative Example NQ7, the surface properties and heating temperature of the surface to be joined to the base metals are within the range of the present invention, but the reduction ratio is less than 10%, and as a result, the entire surface is not joined and the shear strength is low. 〃 Size (IIIm): 5t x 300w
X700Q
（発明の効果）
以上詳述したように、本発明によれば、母材接合予定面
にりん酸塩被膜を形成し、適正な加熱及び圧延条件にて
アルミクラッド鋼板を製造するので、加熱圧延時に接合
面に酸化膜が生成されるのを防止して良好な接合ができ
、高位で安定した優れだせん断強度を有するアルミクラ
ッド鋼板が安価に得られる。
特許出願人 株式会社神戸製鋼所
代理人弁理士 中 村 尚(Effects of the Invention) As detailed above, according to the present invention, a phosphate film is formed on the surface to be joined to the base metal, and an aluminum clad steel sheet is manufactured under appropriate heating and rolling conditions. This method prevents the formation of an oxide film on the bonding surface and allows for good bonding, and provides an inexpensive aluminum-clad steel sheet with high, stable, and excellent shear strength. Patent applicant Hisashi Nakamura, patent attorney representing Kobe Steel, Ltd.
Claims (2)
し、鋼板を母材としたアルミクラッド鋼板をオープンサ
イドイッチ法により製造するに当たり、研磨を施した母
材接合予定面にりん酸又はりん酸塩水溶液を塗布乾燥し
て被膜を形成し、この被膜上に、清浄にした合わせ材を
積層し、合わせ材と母材を固定した後、加熱・圧延する
ことを特徴とするせん断強度の優れたアルミクラッド鋼
板の製造方法。(1) When manufacturing an aluminum clad steel plate using aluminum or aluminum alloy as a lamination material and a steel plate as a base material by the open side witch method, apply phosphoric acid or a phosphate aqueous solution to the polished surface of the base material to be joined. An aluminum clad steel sheet with excellent shear strength characterized by drying to form a film, laminating a cleaned laminated material on this film, fixing the laminated material and base material, and then heating and rolling. Production method.
融温度未満であり、少なくとも１パスはアルミニウムの
圧下率が１０％以上となる条件で圧延する請求項１に記
載の方法。(2) The method according to claim 1, wherein the heating temperature is 250° C. or higher and lower than the melting temperature of aluminum, and rolling is performed under conditions such that the rolling reduction of aluminum is 10% or higher in at least one pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097390A JPH049288A (en) | 1990-04-26 | 1990-04-26 | Production of aluminum clad steel plate having excellent shearing strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11097390A JPH049288A (en) | 1990-04-26 | 1990-04-26 | Production of aluminum clad steel plate having excellent shearing strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH049288A true JPH049288A (en) | 1992-01-14 |
Family
ID=14549189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11097390A Pending JPH049288A (en) | 1990-04-26 | 1990-04-26 | Production of aluminum clad steel plate having excellent shearing strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049288A (en) |
-
1990
- 1990-04-26 JP JP11097390A patent/JPH049288A/en active Pending
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