JPH0561031B2 - - Google Patents
Info
- Publication number
- JPH0561031B2 JPH0561031B2 JP997089A JP997089A JPH0561031B2 JP H0561031 B2 JPH0561031 B2 JP H0561031B2 JP 997089 A JP997089 A JP 997089A JP 997089 A JP997089 A JP 997089A JP H0561031 B2 JPH0561031 B2 JP H0561031B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- ferritic stainless
- coil
- plate
- laminate
- 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.)
- Expired - Lifetime
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910019589 Cr—Fe Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 6
- 239000011888 foil Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高アルミ含有フエライト系ステンレ
ス鋼とオーステナイト系ステンレス鋼とのクラツ
ド材を工業的レベルで量産できる新規な製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a new manufacturing method that allows mass production of a clad material of high aluminum content ferritic stainless steel and austenitic stainless steel on an industrial level.
（従来技術とその問題点）
高アルミ含有フエライト系ステンレス鋼は高温
での耐酸化性に優れるという大きな特徴を持つて
いる。得に高温でしかも酸化に対し厳しい環境で
はAlを増やすことが効果的である。しかしなが
ら、フエライト系ステンレス鋼は高温強度が弱
く、高温での使用においてこの点が問題とされる
ことがある外、Alを含有するフエライト系ステ
ンレス鋼はAlを含有しないタイプあるいはオー
ステナイト系ステンレス鋼に比べ加工性に劣るた
め、加工が難しい場合がある。これらの欠点を克
服する方法として、高アルミ含有フエライト系ス
テンレス鋼と高温強度と加工性とに優れるオース
テナイト系ステンレス鋼とのクラツドを用いるこ
とが有効と考えられる。しかし従来はこのような
材料を製造する適当な方法がなかつた。(Prior art and its problems) High aluminum content ferritic stainless steel has a major feature of excellent oxidation resistance at high temperatures. Increasing the Al content is particularly effective in high-temperature environments that are harsh on oxidation. However, ferritic stainless steel has low high-temperature strength, which can be a problem when used at high temperatures, and ferritic stainless steel containing Al is better than non-Al or austenitic stainless steel. Processing may be difficult due to poor workability. As a method for overcoming these drawbacks, it is thought to be effective to use a cladding of a high-aluminum-containing ferritic stainless steel and an austenitic stainless steel that has excellent high-temperature strength and workability. However, heretofore, there has been no suitable method for manufacturing such materials.
（発明の目的）
本発明は従来技術の上記問題点を改善するもの
で、本発明の目的は、高アルミ含有フエライト系
ステンレス鋼とオーステナイト系ステンレス鋼と
のクラツド材を、特別な設備を必要としないで量
産できる方法を提供するにある。(Object of the Invention) The present invention is to improve the above-mentioned problems of the prior art, and the purpose of the present invention is to produce a clad material of high aluminum content ferritic stainless steel and austenitic stainless steel without requiring special equipment. The goal is to provide a method that allows mass production without having to do so.
（発明の構成）
本発明者らは、鋭意検討の結果、剥離材、アル
ミ箔、フエライト系ステンレス鋼、オーステナイ
ト系ステンレス鋼、剥離材の順に重ねたものを高
真空中で軽く圧力をかけながら加熱すると、温度
と板厚にもよるが、１〜数時間の加熱でフエライ
ト系ステンレス鋼とオーステナイト系ステンレス
鋼は拡散接合してクラツドとなり、Alはフエラ
イト系ステンレス鋼にほぼ均一に拡散侵入する
が、オーステナイト系ステンレス鋼中への侵入は
ごく僅かであること、および剥離材としては一般
にアルミナなどの酸化物、その他のセラミツクス
などが一般的であるが、高価であつたり脆いなど
の理由で工業用としは実用的でなく、あらかじめ
酸化皮膜を形成させた２〜５％Al−Cr−Fe鋼薄
板をこの用途に使用できることが好ましいことを
見出し、本発明を完成したものである。即ち、本
発明のクラツド材の製法は、フエライト系ステン
レス鋼の薄板の片面に、板厚が上記ステンレス鋼
の５〜110％のAlの薄板を、反対面にはオーステ
ナイト系ステンレス鋼の薄板を積層した後、該積
層体をコイルに巻き込み、次いで真空中で900℃
〜1200℃に加熱することを特徴とする。(Structure of the Invention) As a result of intensive studies, the present inventors discovered that a release material, aluminum foil, ferritic stainless steel, austenitic stainless steel, and release material were stacked in this order and heated in a high vacuum while applying light pressure. Then, depending on the temperature and plate thickness, the ferritic stainless steel and austenitic stainless steel are diffusion bonded to form a cladding after heating for one to several hours, and Al diffuses almost uniformly into the ferritic stainless steel, but Penetration into austenitic stainless steel is minimal, and oxides such as alumina and other ceramics are generally used as release materials, but they are not suitable for industrial use because they are expensive and brittle. The present invention was completed based on the discovery that this is not practical and that it is preferable to use a 2 to 5% Al-Cr-Fe steel sheet on which an oxide film has been formed in advance for this purpose. That is, the manufacturing method of the clad material of the present invention is to laminate a thin plate of Al having a thickness of 5 to 110% of the stainless steel on one side of a thin plate of ferritic stainless steel, and a thin plate of austenitic stainless steel on the other side. After that, the laminate was wound into a coil and then heated at 900°C in vacuum.
Characterized by heating to ~1200℃.
以下、本発明の特徴を、その作用と共に具体的
に説明する。 Hereinafter, the features of the present invention will be specifically explained along with its effects.
（作用）
本発明では、積層対のAl面およびオーステナ
イト系ステンレス鋼面に、剥離材としてあらかじ
め加熱により酸化皮膜を形成させた２〜５％Al
−Cr−Fe鋼の薄板を使用すれば、加熱処理後の
剥離が容易になる。得に、剥離材を積層体と共に
コイル形状に巻込み、冷却後に剥離材を分離する
長尺薄コイルの製造には、有効であり、目的薄コ
イルの表面を綺麗に仕上げることができる。ま
た、剥離材を使用すれば、１組の積層体の上に他
の積層体を重ねた状態で加熱処理することができ
る。(Function) In the present invention, 2 to 5% Al is used as a release material to form an oxide film by heating on the Al surface and the austenitic stainless steel surface of the laminated pair.
- If a thin plate of Cr-Fe steel is used, peeling after heat treatment becomes easy. This method is particularly effective for manufacturing long thin coils in which the release material is wound together with the laminate into a coil shape and the release material is separated after cooling, and the surface of the intended thin coil can be finished neatly. Furthermore, if a release material is used, heat treatment can be performed with one set of laminates stacked on top of another laminate.
フエライト系ステンレス鋼の薄板、アルミの薄
板、オーステナイト系ステンレス鋼の薄板、剥離
材などは、あらかじめ一定の長さに切断したもの
を使用してもよいが、工業的に量産する点から
は、角素材のコイルからそれぞれ連続して引き出
して供給するのが好ましい。 Ferritic stainless steel thin plates, aluminum thin plates, austenitic stainless steel thin plates, release materials, etc. may be cut to a certain length in advance, but from the point of view of industrial mass production, corner It is preferable that each material is drawn and supplied successively from a coil of material.
真空中での加熱温度を900〜1200℃に限定した
理由は、拡散温度が低すぎると、拡散熱処理時間
がかかりすぎ実用的でないので、下限を900℃と
した。また、1200℃を超える高温では熱処理費用
が掛ることと、剥離材の高価が薄れてくるので、
上限を1200℃とした。 The reason why the heating temperature in vacuum was limited to 900 to 1200°C is that if the diffusion temperature is too low, the diffusion heat treatment takes too long to be practical, so the lower limit was set at 900°C. In addition, at high temperatures exceeding 1200℃, heat treatment costs are incurred, and the release material becomes less expensive.
The upper limit was set at 1200°C.
Alはオーステナイト系ステンレス鋼には固溶
しにくく、また拡散速度も遅いのに対し、フエラ
イト系ステンレス鋼中へは固溶しやすく、拡散も
速い。フエライト系ステンレス鋼中のAl濃度は
アルミ箔とフエライト系ステンレス鋼板の厚さの
比率によりコントロールできる。フエライト系ス
テンレス鋼の板厚が0.2mm程度以下であれば、実
質的にフエライト系ステンレス鋼中のAl濃度は
均一化される。 Al is difficult to form a solid solution in austenitic stainless steel and has a slow diffusion rate, but it easily forms a solid solution in ferritic stainless steel and diffuses quickly. The Al concentration in ferritic stainless steel can be controlled by the ratio of the thickness of aluminum foil and ferritic stainless steel plate. If the plate thickness of the ferritic stainless steel is approximately 0.2 mm or less, the Al concentration in the ferritic stainless steel is substantially uniform.
アルミニウム薄板のフエライト系ステンレス鋼
に対する板厚を５〜110％に限定した理由は、こ
の比率で充分拡散がなされた時には、Al濃度が
重量比率で1.6〜27％になり、Al濃度が1.6％未満
では充分な耐酸化性が得られず、27％を越えると
脆くて曲げなどの塑性加工が全くできなくなるた
めである。 The reason why the thickness of the aluminum thin plate is limited to 5 to 110% compared to the ferritic stainless steel is that when sufficient diffusion occurs at this ratio, the Al concentration will be 1.6 to 27% by weight, and the Al concentration will be less than 1.6%. This is because sufficient oxidation resistance cannot be obtained, and if it exceeds 27%, it becomes brittle and cannot be subjected to plastic working such as bending at all.
実施例 １
第１図に示すように、1.5mm厚のSUS310S鋼板
３、0.08mm（80μｍ）厚の22％Crフエライト系ス
テンレス鋼板１、24μｍ厚のアルミ箔２およびテ
ンバーカラーをつけた0.2mm厚の３％Al−Cr−Fe
耐熱鋼薄板４を重ねながら、全体をSUS304製の
外径500mm×幅200mmのパイプ５に幅200mmのコイ
ル状に巻き込んだ。このコイルを1100℃×2hrの
真空焼鈍後冷却した巻き戻したところ、９％Al
−20％Crフエライト系ステンレス鋼とSUS310S
のクラツドコイルが得られた。Example 1 As shown in Figure 1, a 1.5 mm thick SUS310S steel plate 3, a 0.08 mm (80 μm) thick 22% Cr ferritic stainless steel plate 1, a 24 μm thick aluminum foil 2, and a 0.2 mm steel plate with a tenbar collar. 3% Al-Cr-Fe thickness
While stacking the heat-resistant steel thin plates 4, the whole was wound into a 200 mm wide coil in a pipe 5 made of SUS304 with an outer diameter of 500 mm and a width of 200 mm. When this coil was vacuum annealed at 1100℃ x 2 hours, cooled and unwound, 9% Al
-20%Cr ferritic stainless steel and SUS310S
A clad coil was obtained.
クラツド材接合部の金属組織の顕微鏡写真（×
50）を第２図に示す。クラツド材は接合部で完全
に接合しており、Alはフエライト系ステンレス
鋼中に十分拡散侵入している。 Micrograph of the metal structure of the clad material joint (×
50) is shown in Figure 2. The clad material is completely bonded at the joint, and Al has sufficiently diffused into the ferritic stainless steel.
実施例 ２
第１図に示すように、1.5mm厚のSUS310S鋼板
３、0.10mm（100μｍ）厚の22％Crフエライト系ス
テンレス鋼板１、50μｍ厚のアルミ箔２およびテ
ンバーカラーをつけた0.2mm厚の３％Al−Cr−Fe
耐熱鋼薄板４を重ねながら、全体をSUS304製の
外径500mm×幅200mmのパイプ５に幅200mmのコイ
ル状に巻き込んだ。このコイルを1100℃×4hrの
真空焼鈍後冷却した巻き戻したところ、約15％
Al−20％Crフエライト系ステンレス鋼と
SUS310Sのクラツドコイルが得られた。Example 2 As shown in Figure 1, 1.5 mm thick SUS310S steel plate 3, 0.10 mm (100 μm) thick 22% Cr ferritic stainless steel plate 1, 50 μm thick aluminum foil 2, and 0.2 mm with a tenbar collar attached. 3% Al-Cr-Fe thickness
While stacking the heat-resistant steel thin plates 4, the whole was wound into a 200 mm wide coil in a pipe 5 made of SUS304 with an outer diameter of 500 mm and a width of 200 mm. When this coil was cooled and unwound after vacuum annealing at 1100℃ x 4 hours, approximately 15%
Al-20%Cr ferritic stainless steel
A SUS310S clad coil was obtained.
（発明の効果）
本発明によれば、高い耐高温酸化性を有し、し
かも高温強度が高く、加工性に優れる複合金属板
を容易に製造することができる。すなわち、アル
ミニウムの容射のような高価な設備あるいは大き
な圧延設備、拡散接合設備を使用しなくても、真
空焼鈍により、高アルミ含有フエライト系ステン
レス鋼と耐熱鋼とのクラツドの製造が可能とな
り、安価に広幅製品が製造できるので、その効果
は顕著である。(Effects of the Invention) According to the present invention, it is possible to easily produce a composite metal plate that has high high temperature oxidation resistance, high high temperature strength, and excellent workability. In other words, vacuum annealing makes it possible to manufacture a cladding of high-aluminum-containing ferritic stainless steel and heat-resistant steel without using expensive equipment such as aluminum blasting, large rolling equipment, or diffusion bonding equipment. The effect is remarkable because wide products can be manufactured at low cost.
第１図は、本発明の実施例を示す説明図。第２
図は、実施例１で得られたクラツド材の金属組織
の顕微鏡写真である。
１……フエライト系ステンレス鋼板……２……
アルミ箔……３……オーステナイト系ステンレス
鋼板……４……２〜５％Al−Cr−Fe鋼板……５
……金属製パイプ。
FIG. 1 is an explanatory diagram showing an embodiment of the present invention. Second
The figure is a micrograph of the metal structure of the clad material obtained in Example 1. 1... Ferritic stainless steel plate... 2...
Aluminum foil...3...Austenitic stainless steel plate...4...2~5% Al-Cr-Fe steel plate...5
...Metal pipe.
Claims (1)
板厚が上記ステンレス鋼の５〜110％のAlの薄板
を、反対面にはオーステナイト系ステンレス鋼の
薄板を積層した後、該積層体をコイルに巻き込
み、次いで真空中で900℃〜1200℃に加熱するこ
とを特徴とする高アルミ含有フエライト系ステン
レス鋼とオーステナイト系ステンレス鋼とのクラ
ツド材の製造方法。 ２ 積層体の剥離材として、あらかじめ酸化皮膜
を形成させた２〜５％Al−Cr−Fe鋼の薄板を使
用する請求項１記載の方法。 ３ 積層体をコイルに巻込み、該コイルを加熱処
理し、冷却後、剥離材を分離する請求項２記載の
方法。[Claims] 1. On one side of a thin plate of ferritic stainless steel,
After laminating a thin Al plate with a thickness of 5 to 110% of the above stainless steel and an austenitic stainless steel thin plate on the other side, the laminate is wound into a coil, and then heated to 900°C to 1200°C in a vacuum. A method for producing a clad material of high-aluminum-containing ferritic stainless steel and austenitic stainless steel, which is characterized by heating. 2. The method according to claim 1, wherein a thin plate of 2 to 5% Al-Cr-Fe steel on which an oxide film has been formed is used as the release material for the laminate. 3. The method according to claim 2, wherein the laminate is wound into a coil, the coil is heat treated, and after cooling, the release material is separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP997089A JPH02192882A (en) | 1989-01-20 | 1989-01-20 | Manufacture of clad material of ferritic stainless steel containing high aluminum and austenitic stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP997089A JPH02192882A (en) | 1989-01-20 | 1989-01-20 | Manufacture of clad material of ferritic stainless steel containing high aluminum and austenitic stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02192882A JPH02192882A (en) | 1990-07-30 |
| JPH0561031B2 true JPH0561031B2 (en) | 1993-09-03 |
Family
ID=11734780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP997089A Granted JPH02192882A (en) | 1989-01-20 | 1989-01-20 | Manufacture of clad material of ferritic stainless steel containing high aluminum and austenitic stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02192882A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4892685B2 (en) * | 2007-01-30 | 2012-03-07 | 国立大学法人 新潟大学 | Diffusion bonding method |
| JP5007951B2 (en) * | 2008-01-28 | 2012-08-22 | 国立大学法人 新潟大学 | Diffusion bonding method |
| JP6246478B2 (en) * | 2013-03-28 | 2017-12-13 | 日新製鋼株式会社 | Stainless steel heat exchanger component and method of manufacturing the same |
-
1989
- 1989-01-20 JP JP997089A patent/JPH02192882A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02192882A (en) | 1990-07-30 |
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