JPH0433783A - Manufacture of aluminum clad steel plate excellent in shear strength - Google Patents

Manufacture of aluminum clad steel plate excellent in shear strength

Info

Publication number
JPH0433783A
JPH0433783A JP13766490A JP13766490A JPH0433783A JP H0433783 A JPH0433783 A JP H0433783A JP 13766490 A JP13766490 A JP 13766490A JP 13766490 A JP13766490 A JP 13766490A JP H0433783 A JPH0433783 A JP H0433783A
Authority
JP
Japan
Prior art keywords
rolling
shear strength
heating
aluminum
steel plate
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
Application number
JP13766490A
Other languages
Japanese (ja)
Inventor
Shoji Tone
登根 正二
Toshiaki Suga
菅 俊明
Atsushi Miyawaki
淳 宮脇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP13766490A priority Critical patent/JPH0433783A/en
Publication of JPH0433783A publication Critical patent/JPH0433783A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To manufacture the aluminum clad steel plate excellent in shear strength by laminating cladding material on the base metal joining predetermined surface and performing rolling thereon under specified conditions of the heating temperature, heating time and rolling pressure. CONSTITUTION:The heating temperature upper limit is made to 350 deg.C to suppress the scale formation on the joining surface to the utmost. The heating temperature lower limit is made to 150 deg.C to suppress rolling load low and besides, obtain the stable and high shear strength. The heating time upper limit is made to 7.09(t)min ((t) denotes the total thickness mm of base metal and cladding material) to limit scales on the joining surface and the heating time lower limit is made to 1.18(t)min to prevent immature heat heating. Further, the rolling pressure (rolling load/contact arc length x rolling width) is made to >= 30kg/mm<2> and thin scales generated in small quantities on the base metal surface are collapsed by rolling.

Description

【発明の詳細な説明】[Detailed description of the invention]

(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。し
たがって、酸化物の生成を防止する手段として、特開昭
64−5683号や母材面に溶射を施す方法が提案され
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、加熱炉から抽出した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、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、接合性に関しては比較的良
好ではあるものの、強度に関しては、せん断強度6 k
g f / am”以上が得られず、たとえせん断強度
6kgf/m112程度が得られたとしても、安定して
せん断強度6 kg f / ram”以上のものが得
られているとは言い離かった。 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、6 kg f / +am”
以上の如く優れたせん断強度が安定して得られるアルミ
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) 前述の目的を達成するため、本発明者等は、加熱、圧延
条件に関して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ツ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、加熱温度=1
50〜350℃、加熱時間:1.18t〜7.09 を
分(但し、t:母材と合わせ材のトータル板厚(+m)
)、圧延圧力(圧延荷重/(接触弧長×圧延幅)):3
0kgf/mm”以上の条件で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を
要旨とするものである。 以下に本発明を更に詳細に説明する。 (作用) 一般に、アルミクラッド鋼板のせん断強度を劣化させる
要因として、加熱工程において生成する母材表面のスケ
ールが挙げられており、その防止策には、前述の特開昭
64−5683号のように鋼板を薄スケールが発生しな
い温度(約165℃)にする方法や、母材表面に溶射を
施し、スケールを抑制する方法がある。 一方、本発明は、加熱温度を制限することにより、スケ
ールの生成を極力抑え、しかも、若干薄スケールが生成
したとしても、圧延条件、特に圧延圧力が所定の範囲内
であれば、高いせん断強度のアルミクラッド鋼板を製造
することが可能であるとの知見に基づくものである。 まず、本発明において加熱温度を350℃以下にしたの
は、加熱前にグラインダ研磨等により清浄にした母材接
合予定面に生成する接合に関して極めて有害なスケール
を抑制するためであり、また、加熱温度を150℃以上
にするのは、この温度を下回ると母材表面のスケールは
十分に抑制することができるが、合わせ材と母材を接合
させるのに必要な圧延荷重が非常に高くなり、また、接
合してもそのせん断強度はバラツキが大きく、安定して
高いせん断強度を得ることができないからである。 また、加熱時間が1.18を分(t:母材と合わせ材の
トータル板厚(mm))未満であると、所定の加熱温度
(150〜350℃)まで昇温することができず、未熟
熱加熱となってしまい、逆に、7゜09を分を超えると
、均熱加熱はできるが、加熱前にグラインダ研磨等によ
り清浄にした母材接合予定面に少量生成した薄スケール
が、圧延条件を制限しても、接合性を劣化させるほど成
長してしまうので良くない。 これらのことから、加熱温度は150℃以上、350℃
以下とし、かつ、加熱時間は1.18を全以上、7.0
9を分以下に制限する必要がある。 なお、加熱時間には、母材と合わせ材のトータル板厚(
1)を考慮する必要があることを実験により確認したも
のである。 しかしながら、加熱温度と加熱時間をこのように制限し
ても、完全には母材面に生成する薄スケールを防止する
ことができず、せん断強度の劣化を引き起こす場合があ
る。その対策として、本発明者等は、更に圧延圧力を制
限することにより、高位安定なせん断強度が得られるこ
とを見い出したのである。そのために行った基礎実験の
結果の一例を以下に示す。 第1図は、母材(材質:5S41、寸法=20ux30
0Wx1000Q(mm))、合わせ材(材質:AQ、
寸法:5tX300WX700Q(m+w))の素材を
2層構造のコンポジットに組み立てて、加熱温度100
〜400℃、加熱時間60分で、圧延圧力を種々変化さ
せ検討した結果を示している。 同図よりわかるように、圧延圧力(すなわち、圧延荷重
/(接触弧長X圧延幅))を30kgf/mm2以上に
すれば、母材面に少量生成した薄スケールも圧延により
崩壊せしめることが可能であり、母材と合わせ材を強固
に接合することが可能である。 この知見に基づき、加熱時間を上記本発明範囲内で変化
させても、同様の結果が得られた。 なお、本発明における圧延条件のうち、圧延温度に関し
ては、所定の加熱温度(150〜350℃)に加熱した
後、速やかに圧延するならば必然的に決まる温度である
ので、特に制限しないが、加熱後直ちには圧延しない場
合を勘案すると、圧延温度は150℃以上となるように
配慮するのが望ましい。 勿論、本発明におけるアルミニウム或いはアルミニウム
合金や鋼の材質、板厚や、母材と合わせ材の固定手段等
々は特に制限されない。 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、第1表に示すとおり
、加熱温度130〜400℃、加熱時間20〜190分
、圧延圧力25〜43kgf/履謄2の条件で圧延を行
い、アルミクラッド鋼板を製造した。 びアルミニウム の口 鋼板の材質:5S41 鋼板のサイズ: 20 t X 300w X 100
0 Q (mm)アルミニウム板の材質:工業用アルミ
ニウム板アルミニウム板のサイズ: 5 t X 300 w X 700 Q (mm)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、かつ、せん断
強度6 kg f / mm2以上のものを合格とし、
それ以外のものを不合格とした。以上の結果を第1表に
示す。 第1表より、以下の如く考察される。 &1〜NcI5は本発明例であり、いずれも、UST接
合性は全面接合で、しかもせん断強度6kgf/1Ii
2以上の非常に優れた接合性を有していることがわかる
。 一方、比較例のうち、Nα6は、加熱温度が低いので全
面接合せず、せん断強度も低い。 h7は加熱温度が本発明範囲の上限を外れた例であり、
母材表面にスケールが生成し、全面接合するものの、せ
ん断強度は3 、5 kgf/++un”と低い。 Nα8は加熱時間が短い例で、熟熱加熱ができておらず
、部分的な接合しか得られていない。 Nα9は、逆に加熱時間が長すぎる例で、全面接合する
ものの、せん断強度は3 、4 kgf / am”と
低い。 No 10は、圧延圧力が30 kgf / +u+”
を下回った例で、全面接合しても、せん断強度は5 、
5 kgf/lI!12とやや低い値で、6kgf/m
va2以上を満足することはできなかった。
(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)
So-called aluminum-clad steel sheets, which are clad with aluminum or aluminum alloy sheets (laminated materials), 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, a method using hot rolling is adopted, but in this case, oxides are generated on the surface where the base metals are to be joined, and This will deteriorate the bonding properties of the mating materials. Therefore, as a means to prevent the formation of oxides, Japanese Patent Laid-Open No. 64-5683 and a method of thermal spraying the base material surface 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 it is extracted from the heating furnace.In addition, it is necessary to combine the base material and the laminated material immediately before rolling, which makes workability extremely difficult. The problem is that it's bad. Moreover, in the latter case, there is a problem that not only does pre-treatment before rolling be added, which increases the number of manufacturing steps, but also that the manufacturing cost is extremely high. Moreover, although the bondability is relatively good, the shear strength is only 6k.
Even if a shear strength of about 6 kgf/m112 was obtained, it was far from possible to stably obtain a shear strength of 6 kg f/ram" or higher. . The present invention was made in order to solve the problems in the above-mentioned prior art.
As described above, the object of the present invention is to provide a method for manufacturing an aluminum clad steel plate that can stably obtain excellent shear strength at an industrial cost. (Means for Solving the Problem) In order to achieve the above-mentioned object, the present inventors have conducted intensive research on heating and rolling conditions, and as a result, have developed a method for producing an aluminum clad steel sheet having high and stable shear strength. He found out. 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 German trench method, the present invention provides the following steps:
After laminating the cleaned laminated material on the polished surface of the base material to be joined and fixing the laminated material and the base material, heating temperature = 1
50 to 350℃, heating time: 1.18t to 7.09 minutes (where t: total thickness of base material and combined material (+m))
), rolling pressure (rolling load/(contact arc length x rolling width)): 3
The gist of this invention is a method for producing an aluminum clad steel sheet with excellent shear strength, which is characterized by rolling under conditions of 0 kgf/mm" or higher. The present invention will be explained in more detail below. (Function) Generally, Scale on the surface of the base material generated during the heating process is cited as a factor that deteriorates the shear strength of aluminum-clad steel sheets.To prevent this, as in the above-mentioned Japanese Patent Laid-Open No. 64-5683, thin scale steel sheets are used. There are two methods: a method of controlling the temperature at which scale does not occur (approximately 165°C), and a method of thermal spraying the surface of the base material to suppress scale.On the other hand, the present invention minimizes scale formation by limiting the heating temperature. Moreover, this is based on the knowledge that even if a slightly thin scale is formed, it is possible to produce aluminum-clad steel sheets with high shear strength as long as the rolling conditions, especially the rolling pressure, are within a specified range. First, in the present invention, the heating temperature is set to 350° C. or less in order to suppress scale that is extremely harmful to the bonding that is generated on the surface to be bonded of the base material that has been cleaned by grinding or the like before heating. The reason for setting the heating temperature to 150°C or higher is that if the temperature is lower than this, scale on the surface of the base material can be sufficiently suppressed, but the rolling load required to join the laminated material and the base material will be extremely high. In addition, even if bonded, the shear strength varies widely, making it impossible to obtain a stable high shear strength. In addition, the heating time is 1.18 minutes (t: the total of the base material and the combined material). If the plate thickness is less than (mm), the temperature cannot be raised to the predetermined heating temperature (150 to 350°C), resulting in premature heating; on the other hand, if it exceeds 7°09 minutes, Soaking heating is possible, but a small amount of thin scale that forms on the surface to be joined of the base metal, which has been cleaned by grinding or other means before heating, will grow to the extent that it will deteriorate the joining performance even if the rolling conditions are limited. No. For these reasons, the heating temperature should be 150°C or higher and 350°C.
The following, and the heating time is 1.18 or more, 7.0
It is necessary to limit 9 to minutes or less. The heating time depends on the total thickness of the base material and the composite material (
It was confirmed through experiments that it is necessary to take 1) into consideration. However, even if the heating temperature and heating time are limited in this way, it is not possible to completely prevent thin scale from forming on the base metal surface, which may cause deterioration of shear strength. As a countermeasure for this, the present inventors have discovered that by further limiting the rolling pressure, a high and stable shear strength can be obtained. An example of the results of basic experiments conducted for this purpose is shown below. Figure 1 shows the base material (material: 5S41, dimensions = 20ux30
0Wx1000Q (mm)), laminated material (material: AQ,
Dimensions: 5t x 300w x 700Q (m+w)) materials are assembled into a two-layer composite and heated to a temperature of 100
It shows the results of various studies at various rolling pressures at a temperature of ~400°C and a heating time of 60 minutes. As can be seen from the figure, if the rolling pressure (i.e., rolling load/(contact arc length x rolling width)) is set to 30 kgf/mm2 or more, it is possible to collapse even a small amount of thin scale formed on the base metal surface by rolling. Therefore, it is possible to firmly join the base material and the laminated material. Based on this knowledge, similar results were obtained even when the heating time was varied within the range of the present invention. Note that among the rolling conditions in the present invention, the rolling temperature is not particularly limited, as it is a temperature that is inevitably determined if rolling is performed immediately after heating to a predetermined heating temperature (150 to 350 ° C.). Considering the case where rolling is not carried out immediately after heating, it is desirable that the rolling temperature be kept at 150° C. or higher. Of course, in the present invention, there are no particular limitations on the material of aluminum, aluminum alloy, or steel, the plate thickness, the means for fixing the base material and the laminated material, etc. Next, examples of the present invention will be shown. (Example) Prepare steel plates and aluminum plates with the details shown below, and
A composite with a layered structure was assembled and rolled under the conditions of a heating temperature of 130 to 400°C, a heating time of 20 to 190 minutes, and a rolling pressure of 25 to 43 kgf/roll 2, as shown in Table 1, to produce an aluminum clad steel plate. . Material of steel plate: 5S41 Size of steel plate: 20t x 300w x 100
0 Q (mm) Material of aluminum plate: Industrial aluminum plate Size of aluminum plate: 5 t x 300 w x 700 Q (mm) The obtained material was investigated for UST bondability and shear strength. In addition, those with UST bondability of full surface bonding and shear strength of 6 kgf/mm2 or higher are considered to be acceptable.
Anything else other than that was rejected. The above results are shown in Table 1. From Table 1, the following considerations can be made. &1 to NcI5 are examples of the present invention, and in all of them, the UST bondability is full-surface bonding, and the shear strength is 6 kgf/1Ii.
It can be seen that it has extremely excellent bonding properties of 2 or more. On the other hand, among the comparative examples, Nα6 has a low heating temperature, so the entire surface is not bonded, and the shear strength is also low. h7 is an example in which the heating temperature is outside the upper limit of the range of the present invention,
Although scale is formed on the surface of the base metal and the entire surface is bonded, the shear strength is as low as 3.5 kgf/++un''. Nα8 is an example of a short heating time, and mature heating is not possible and only partial bonding is possible. On the other hand, Nα9 is an example in which the heating time is too long, and although the entire surface is bonded, the shear strength is as low as 3 or 4 kgf/am. No. 10 has a rolling pressure of 30 kgf/+u+”
In an example where the shear strength is less than 5, even if the entire surface is bonded, the shear strength is 5.
5 kgf/lI! A slightly lower value of 12, 6kgf/m
It was not possible to satisfy VA2 or higher.

【以下余白】[Left below]

(発明の効果) 以上詳述したように、本発明によれば、特に加熱温度、
加熱時間及び圧延圧力を制御するので、高位安定した6
 kgf / mm”以上の優れたせん断強度を有する
アルミクラッド鋼板を製造することが可能である。また
、アルミクラッド鋼板を安価に製造できる。
(Effects of the Invention) As detailed above, according to the present invention, in particular, the heating temperature,
Since heating time and rolling pressure are controlled, high-level stable 6
It is possible to produce an aluminum clad steel plate having an excellent shear strength of 1 kgf/mm or more.Also, the aluminum clad steel plate can be produced at low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はせん断強度に及ぼす加熱温度と圧延圧力の影響
を示す図である。 特許出願人  株式会社神戸製鋼所 代理人弁理士 中  村   尚 第1図 8熱↓L (c)
FIG. 1 is a diagram showing the influence of heating temperature and rolling pressure on shear strength. Patent applicant Takashi Nakamura, Patent attorney representing Kobe Steel, Ltd. Figure 1 8 Heat ↓L (c)

Claims (1)

【特許請求の範囲】[Claims] (1)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、研磨を施した母
材接合予定面上に、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、加熱温度:150〜350℃
、加熱時間:1.18t〜7.09t分(但し、t:母
材と合わせ材のトータル板厚(mm))、圧延圧力(圧
延荷重/(接触弧長×圧延幅)):30kgf/mm^
2以上、の条件で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 the laminating material and a steel plate as the base material by the open side witch method, the cleaned laminated material is laminated on the polished surface of the base material to be joined. After fixing the laminated material and base material, heating temperature: 150-350℃
, Heating time: 1.18t to 7.09t min (where t: total plate thickness of base material and combined material (mm)), Rolling pressure (rolling load/(contact arc length x rolling width)): 30 kgf/mm ^
A method for producing an aluminum clad steel sheet with excellent shear strength, characterized by rolling under conditions of 2 or more.
JP13766490A 1990-05-28 1990-05-28 Manufacture of aluminum clad steel plate excellent in shear strength Pending JPH0433783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13766490A JPH0433783A (en) 1990-05-28 1990-05-28 Manufacture of aluminum clad steel plate excellent in shear strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13766490A JPH0433783A (en) 1990-05-28 1990-05-28 Manufacture of aluminum clad steel plate excellent in shear strength

Publications (1)

Publication Number Publication Date
JPH0433783A true JPH0433783A (en) 1992-02-05

Family

ID=15203932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13766490A Pending JPH0433783A (en) 1990-05-28 1990-05-28 Manufacture of aluminum clad steel plate excellent in shear strength

Country Status (1)

Country Link
JP (1) JPH0433783A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170014941A1 (en) * 2014-04-01 2017-01-19 Toyo Kohan Co., Ltd. Method for producing metal laminate material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170014941A1 (en) * 2014-04-01 2017-01-19 Toyo Kohan Co., Ltd. Method for producing metal laminate material
US10259073B2 (en) * 2014-04-01 2019-04-16 Toyo Kohan Co., Ltd. Method for producing metal laminate material

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