JP2717164B2 - Clad metal plate - Google Patents
Clad metal plateInfo
- Publication number
- JP2717164B2 JP2717164B2 JP2210702A JP21070290A JP2717164B2 JP 2717164 B2 JP2717164 B2 JP 2717164B2 JP 2210702 A JP2210702 A JP 2210702A JP 21070290 A JP21070290 A JP 21070290A JP 2717164 B2 JP2717164 B2 JP 2717164B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- base metal
- clad
- opening
- base
- 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
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、母材金属板の表面に、該母材金属板より耐
磨耗性の高い金属層を合せ材として肉盛りにより被覆し
た耐磨耗性の片面肉盛りクラッド金属板に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a base metal plate having a metal layer having higher wear resistance than that of the base metal plate as a bonding material, and being coated by overlaying. The present invention relates to an abradable clad metal plate on one side.
軟鋼等の安価な低級鋼材からなる母材金属板の片方の
表面に高級合金からなる金属層を合せ材として被覆した
片面クラッド金属板は、経済性と耐食性、耐熱性、耐磨
耗性等とを兼備する合理的な金属材料として既に多くの
分野で使用されている。A single-sided clad metal plate in which one surface of a base metal plate made of inexpensive low-grade steel such as mild steel is coated with a metal layer made of a high-grade alloy as a bonding material is economical, corrosion resistant, heat resistant, abrasion resistant, etc. It has already been used in many fields as a rational metal material having both.
片面クラッド金属板に耐磨耗性を兼備させる場合の合
せ材としては、高マンガンクロムオーステナイト系鋼、
高炭素高クロム合金（2.7％Ｃ、27％Cr）、マルテンサ
イト系13％クロム鋼等がある。When combining abrasion resistance with a single-sided clad metal plate, high manganese chromium austenitic steel,
There are high carbon high chromium alloys (2.7% C, 27% Cr), martensitic 13% chromium steel, and the like.
耐磨耗性片面クラッド金属板の製造は多くの方法で行
われており、溶接肉盛りや溶射肉盛りもその一つであ
る。特に、本出願人は、溶接肉盛りクラッドについての
研究を続けており、その成果を特許として既に取得して
いる（特許第1256535号、同第1374073号）。The production of abrasion-resistant single-sided clad metal sheets has been carried out by a number of methods, including weld overlaying and thermal spray overlaying. In particular, the present applicant has continued research on weld overlay cladding and obtained the results as patents (Patent Nos. 1256535 and 137073).
溶接肉盛りや溶射肉盛りでは、溶着によって母材金属
板の表面に合せ材金属層が被覆される。In the welding overlay or the thermal spray overlay, the surface of the base metal plate is coated with a matching metal layer by welding.
ところが、従来の耐磨耗性片面肉盛りクラッド金属板
においては、母材金属板が合せ材金属層に対する著しい
拘束部材として作用するという問題があった。However, in the conventional wear-resistant single-sided clad metal plate, there is a problem that the base metal plate acts as a remarkable restraining member for the metal layer of the composite material.
そのため、母材金属板の表面に全く線膨張係数の異な
る合せ材金属層を溶接肉盛りにより溶着した場合、例え
ば軟鋼に前記の耐磨耗性に優れた高マンガンクロムオー
ステナイト系鋼、高炭素高クロム合金、マルテンサイト
系13％クロム鋼等を溶接肉盛りした場合、これらの合せ
材は硬くて伸びが少なく割れ易いので、溶着後の凝固過
程において線膨張係数の差異による内部応力により、合
せ材金属層にしばしば割れが生じる。Therefore, when a combination metal layer having a completely different linear expansion coefficient is welded to the surface of the base metal plate by welding overlaying, for example, a high manganese chrome austenitic steel excellent in wear resistance and a high carbon When chromium alloy, martensitic 13% chromium steel, etc. are weld overlayed, these composites are hard, have low elongation and are easy to crack. Cracks often occur in the metal layer.
また、合せ材金属層に割れが生じない場合にも、第４
図に示すように、クラッド金属板10には、母材金属板11
と合せ材金属層12との収縮率の相異に起因する縦曲り
（同図（ａ）に図示）や角変形と呼ばれる幅方向の反り
（同図（ｂ）に図示）が生じるのを避け得ない。Also, in the case where cracks do not occur in the composite material metal layer,
As shown in the figure, a cladding metal plate 10 has a base metal plate 11
Longitudinal bending (shown in FIG. 7A) and warpage in the width direction called angular deformation (shown in FIG. 7B) caused by the difference in the shrinkage ratio between the metal layer 12 and the metal layer 12 are avoided. I can't get it.
溶着後、大きく変形したクラッド金属板は、ロールや
プレスによる矯正をを受けるが、変形が大きいと矯正時
の加工度が大になり、合せ材が前述した高マンガンクロ
ムオーステナイト系鋼、高炭素高クロム合金、マルテン
サイト系13％クロム鋼の場合は、その矯正加工により結
局は合せ材表面に多くの割れが生じてしまう。After welding, the deformed clad metal sheet undergoes straightening by rolls and presses. However, if the deformation is large, the degree of work during straightening increases, and the composite material is made of the high manganese chromium austenitic steel, high carbon high In the case of a chromium alloy or a martensitic 13% chromium steel, many cracks eventually occur on the surface of the composite material due to the straightening.
同様の理由から、このような耐磨耗性片面肉盛りクラ
ッド金属板が例えば500〜900℃の高温で使用されると、
母材金属板と合せ材金属層との境界が剥離したり、合せ
材金属層に割れを生じる危険性が高い。高温使用におい
て、クラッド金属板に剥離や割れが生じることは、高温
装置類の安全が保証されないこと意味し、事故に至らな
いまでも操業の一時中断等を余儀なくされ、大きな問題
であった。For the same reason, when such abrasion-resistant single-sided clad metal plate is used at a high temperature of, for example, 500 to 900 ° C.,
There is a high risk that the boundary between the base metal plate and the composite metal layer will peel off, or that the composite metal layer will crack. The occurrence of peeling or cracking of the clad metal plate during high-temperature use means that the safety of high-temperature equipment is not guaranteed, and the operation has to be temporarily suspended even before an accident occurs, which is a serious problem.
更に、軟鋼に高マンガンクロムオーステナイト系鋼、
高炭素高クロム系合金、マルテンサイト系13％クロム鋼
等をクラッドしたものは、母材と合せ材との硬度差も大
きく異なるので、冷間圧延時に板中央部で引き裂き割れ
が生じたり、圧延ロールに巻き付くような変形が生じ
る。この問題は他のクラッド金属板にも生じ、一般にク
ラッド金属板は冷間圧延が困難だとされている。In addition, high manganese chromium austenitic steel is used for mild steel,
High-carbon high-chromium alloys, martensitic 13% chromium steel clad steel, etc. have a large difference in hardness between the base metal and the composite material. Deformation that winds around the roll occurs. This problem also occurs in other clad metal sheets, and it is generally considered that the clad metal sheet is difficult to cold-roll.
更にまた、一般のクラッド金属板は、合せ材が被覆さ
れている分、総じて重く、加工も容易でない。Furthermore, a general clad metal plate is generally heavy and difficult to process because it is covered with a bonding material.
本発明の目的は、クラッド時や高温使用時、冷間圧延
時に割れ及び変形が生じ難く、且つ軽量で加工が容易な
耐磨耗性片面肉盛りクラッド金属板を提供することにあ
る。An object of the present invention is to provide an abrasion-resistant single-sided clad metal plate which is hardly cracked and deformed during cladding, high-temperature use, and cold rolling, and is lightweight and easy to process.
請求項１に記載の本発明のクラッド金属板は、母材金
属板の片方の表面に、該母材金属板より耐磨耗性の高い
金属層を合せ材として肉盛りにより被覆した耐磨耗性の
肉盛りクラッド金属板であって、前記母材金属板が、そ
の両表面間を貫通する多数の開口部を有する多孔金属板
であり、且つ母材金属板の厚みが2.4〜16mmであり、母
材金属板の表面における開口部の面積専有率が20〜60％
であり、開口部の個々の面積が0.8〜28mm2であることを
特徴としてなる。The clad metal sheet of the present invention according to claim 1, wherein one of the surfaces of the base metal plate is covered by overlaying a metal layer having higher wear resistance than the base metal plate as a bonding material. A cladding metal plate, the base metal plate is a perforated metal plate having a large number of openings penetrating between both surfaces thereof, and the thickness of the base metal plate is 2.4 to 16 mm. The area occupancy rate of the opening on the surface of the base metal plate is 20-60%
Wherein the individual area of the opening is 0.8 to 28 mm 2 .
請求項２に記載の本発明のクラッド金属板は、その合
せ材が母材金属板の開口部にも充填されたものである。The clad metal plate of the present invention according to claim 2 is such that the joining material is also filled in the opening of the base metal plate.
請求項１に記載の本発明のクラッド金属板において
は、母材金属板が多孔金属板とされているので、その表
面に被覆された合せ材金属層に対する拘束力が弱い。In the clad metal plate according to the first aspect of the present invention, since the base metal plate is a perforated metal plate, the binding force of the cladding metal layer coated on its surface is weak.
即ち、クラッド時や高温使用時、冷間圧延時に合せ材
金属層が応力を受けても、その応力が母材金属板の板面
に平行な方向の変形で吸収される。従って、クラッド金
属板の変形や合せ材金属層の割れが著しく抑制される。That is, even if stress is applied to the composite metal layer during cladding, high temperature use, or cold rolling, the stress is absorbed by deformation in a direction parallel to the surface of the base metal plate. Therefore, deformation of the clad metal plate and cracking of the composite metal layer are significantly suppressed.
ちなみに、クラッド時の割れおよび変形は、母材金属
板の片面に合せ材金属層が溶着される片面肉盛りクラッ
ドで著しい。Incidentally, cracking and deformation during cladding are remarkable in a single-side clad clad in which a matching metal layer is welded to one surface of a base metal plate.
また、請求項２に記載の本発明のクラッド金属板にお
いては、肉盛りクラッドの際に、溶融した合せ材が母材
金属板の各開口部に流入することにより、板厚方向の温
度勾配が非常に小さくなり、且つクラッド金属板の板厚
方向全域に一体の合せ材金属部が形成される。板厚方向
全域に同じ線膨張係数をもつ合せ材金属部が形成され
て、しかも板厚方向の温度勾配が小さければ、肉盛りク
ラッド時等における変形や割れは一層抑制される。ま
た、冷却圧延においても割れや変形が著しく抑制され
る。Further, in the clad metal sheet of the present invention described in claim 2, the temperature gradient in the sheet thickness direction is reduced by flowing the melted composite material into each opening of the base metal sheet during cladding. It becomes very small, and an integral metal part is formed over the entire area in the thickness direction of the clad metal plate. If the metal layer having the same coefficient of linear expansion is formed in the entire area in the thickness direction and the temperature gradient in the thickness direction is small, deformation and cracking during cladding and the like are further suppressed. Also, cracking and deformation are significantly suppressed in cold rolling.
以下に本発明を実施例をまじえて詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to examples.
第１図（ａ）（ｂ）は本発明のクラッド金属板の構造
を模式的に示す断面図である。1 (a) and 1 (b) are cross-sectional views schematically showing the structure of the clad metal plate of the present invention.
第１図（ａ）のクラッド金属板は、多数の開口部11a
を有する母材金属板11の片方の表面に、溶接肉盛りによ
って合せ材金属層12を被覆したものである。合せ材は、
母材より耐磨耗性の高い金属からなり、母材金属板11の
各開口部11aにも流入充填されている。The clad metal plate of FIG. 1 (a) has a large number of openings 11a.
Is formed by coating one surface of a base metal plate 11 having a bonding metal layer 12 by welding. The composite material is
It is made of a metal having higher wear resistance than the base material, and is also filled into each opening 11a of the base metal plate 11.
第１図（ｂ）のクラッド金属板は、母材金属板11の表
面にのみ合せ材金属層12を被覆し、母材金属板11の各開
口部11aには合せ材を充填させない構造になっている。
このような構造のクラッド金属板は、溶接肉盛りによる
場合は、例えばその肉盛り施工の際に各開口部11aをア
ルミナ等の耐火物で閉塞しておくことにより容易に製造
される。The clad metal plate of FIG. 1 (b) has a structure in which only the surface of the base metal plate 11 is coated with the bonding material metal layer 12, and each opening 11a of the base metal plate 11 is not filled with the bonding material. ing.
When the clad metal plate having such a structure is formed by welding, it is easily manufactured by closing each opening 11a with a refractory material such as alumina at the time of building.
第２図は本発明のクラッド金属板における母材金属板
の代表例を示す斜視図である。FIG. 2 is a perspective view showing a typical example of a base metal plate in the clad metal plate of the present invention.
母材金属板の材質は特に問わず、安価な軟鋼を用いる
他、ステンレス鋼、低合金鋼等を採用することもある。The material of the base metal plate is not particularly limited, and in addition to using inexpensive mild steel, stainless steel, low alloy steel, or the like may be employed.
母材金属板の厚みＴは、2.4〜16mmとする。 The thickness T of the base metal plate is set to 2.4 to 16 mm.
2.4mm未満では、薄さのために合せ材に対する拘束力
が弱く開口部を与える意味が特にない。また、溶接肉盛
りでは非常に大きな変形が生じ、矯正加工が困難にな
る。ただし、溶射肉盛りの場合は、合せ材金属層が通常
0.2〜0.5mmと薄いので、2.4mm未満でも母材金属材が拘
束部材として機能するので、開口部は有効である。特
に、溶射皮膜は素材に殆ど溶着せず、素材表面との機械
的結合にしか過ぎないので、開口部は溶射皮膜に投錨効
果を与え、より厚肉な皮膜の形成を可能にする。If it is less than 2.4 mm, the binding force is weak to the joining material due to the thinness, and there is no particular meaning to provide an opening. In addition, a very large deformation occurs in the weld overlay, which makes straightening difficult. However, in the case of spray coating, the metal layer
Since it is as thin as 0.2 to 0.5 mm, the opening is effective because the base metal material functions as a restraining member even if it is less than 2.4 mm. In particular, since the thermal spray coating hardly adheres to the material and is merely a mechanical bond with the surface of the material, the opening provides an anchoring effect to the thermal spray coating and enables formation of a thicker film.
16mm超では、仮自体の拘束度が大きく、望ましいレベ
ルまで拘束度を低下させようとすると、開口率が極端に
大きくなり、母材金属板が孔ばかりになって溶接肉盛り
等が困難になる。If it exceeds 16mm, the degree of restraint of the temporary itself is large, and if it is attempted to reduce the degree of restraint to a desired level, the aperture ratio becomes extremely large, the base metal plate becomes only holes, and it becomes difficult to build up welding. .
母材金属板における開口部は、打抜きによる丸孔を基
本とするが、三角形、菱形、四角形、楕円形等の打抜き
孔であってもよく、更に、エキスパンションによる開口
部であってもよく、その形状、形成法は問わない。ま
た、開口部の配列はマトリックス状、千鳥状等を問わな
い。溶着時に発生する肉盛り金属の収縮応力に対して
は、丸孔が最も分散性が良好のようである。The opening in the base metal plate is basically a punched round hole, but may be a punched hole such as a triangle, a diamond, a square, an ellipse, etc., and may be an opening by expansion. The shape and the forming method are not limited. Further, the arrangement of the openings may be in a matrix shape, a staggered shape, or the like. The round hole seems to have the best dispersibility with respect to the shrinkage stress of the build-up metal generated during welding.
母材金属板の表面における開口部の面積専有率（以下
これを開口率という）については20〜60％とする。The area occupancy rate of the opening on the surface of the base metal plate (hereinafter referred to as the opening rate) is set to 20 to 60%.
20％未満では、母材金属板の合せ材金属層に対する拘
束度が充分に低下しない。開口率をＯとすれば、拘束度
はＲはＯと母材金属板の厚みＴとの関係式Ｒ＝Ｋ・T/O
で表わされる。Ｋは母材金属板の材質によって決まる定
数である。If it is less than 20%, the degree of constraint of the base metal plate on the composite metal layer does not sufficiently decrease. Assuming that the aperture ratio is O, the degree of constraint R is a relational expression R between O and the thickness T of the base metal plate R = K · T / O
Is represented by K is a constant determined by the material of the base metal plate.
開口率が60％超では、母材金属板が前述したような孔
ばかりの板となる。特に望ましい開口率は、母材金属板
が厚いほど大きくなる傾向を示す。If the aperture ratio exceeds 60%, the base metal plate becomes a plate having only holes as described above. A particularly desirable aperture ratio tends to increase as the base metal plate becomes thicker.
第３図は母材金属板の厚みＴと開口率Ｏとの関係につ
いての調査結果を示す図表である。FIG. 3 is a table showing the results of an investigation on the relationship between the thickness T of the base metal plate and the aperture ratio O.
調査は第１図（ａ）のクラッド金属板について行い、
×は開口部を通して肉盛り金属が抜け落ちたことを示
し、△は肉盛り施工により角変形が生じたことを示して
おり、○が抜け落ちも角変形も生じなかった特に良好な
クラッド金属板である。母材金属板の厚みＴが2.4mmの
場合の特に好ましい開口率は20〜30％であるのに対し、
16mmの場合のそれは、30〜50％となる。ただし、△にあ
っても開口率が０％の場合に比較すれば角変形は小さ
い。The survey was conducted on the clad metal plate shown in FIG.
× indicates that the build-up metal dropped out through the opening, Δ indicates that angular deformation occurred due to the build-up work, and ○ indicates a particularly good clad metal plate in which no drop-out or angular deformation occurred. . A particularly preferable aperture ratio when the thickness T of the base metal plate is 2.4 mm is 20 to 30%,
At 16 mm, that would be 30-50%. However, even in the case of Δ, the angular deformation is small as compared with the case where the aperture ratio is 0%.
開口部の個々の開口面積については、0.8〜28mm2とす
る。この範囲は、開口部が丸孔の場合、直径的1mm〜6mm
に相当する。前記開口率は開口部の個々の開口面積と、
単位面積における開口部の数、すなわち密度とによって
支配される。従って、同一開口率でも開口面積は様々に
選択できる。しかし、開口率が適正でも開口面積が極端
に小さい場合は、その加工が難しく、逆にこれが過大の
場合は、反りが生じやすく、肉盛り金属の抜け落ち等も
生じやすい。そのため、開口面積は0.8〜28mm2とし、板
厚が薄いほど小面積とするのがよい。例えば、丸孔の直
径に換算して、板厚が2.4mmの場合は１〜2mmが特に望ま
しく、16mmの場合は４〜6mmが特に望ましい。The area of each opening is 0.8 to 28 mm 2 . This range is 1 mm to 6 mm in diameter if the opening is a round hole
Is equivalent to The aperture ratio is an individual opening area of the opening,
It is governed by the number of openings in a unit area, that is, the density. Therefore, even with the same aperture ratio, the aperture area can be variously selected. However, even if the opening ratio is appropriate, if the opening area is extremely small, the processing is difficult. Conversely, if the opening area is excessively large, warpage is likely to occur, and the build-up metal is likely to fall off. Therefore, the opening area is preferably set to 0.8 to 28 mm 2, and the smaller the plate thickness, the smaller the area. For example, in terms of the diameter of a round hole, 1-2 mm is particularly desirable when the plate thickness is 2.4 mm, and 4-6 mm is particularly desirable when the plate thickness is 16 mm.
母材金属板の片方の表面に被覆される合せ材金属層の
材質は、その表面に耐磨耗性を付与するために、母材金
属板より耐磨耗性の高い金属とする。具体的には、母材
金属板が軟鋼の場合は、高マンガンクロムオーステナイ
ト系鋼、高炭素高クロム合金（2.7％Ｃ、27％Cr）、マ
ルテンサイト系13％クロム鋼等を挙げることができる。The material of the composite metal layer coated on one surface of the base metal plate is a metal having higher wear resistance than the base metal plate in order to impart wear resistance to the surface. Specifically, when the base metal plate is mild steel, high manganese chromium austenitic steel, high carbon high chromium alloy (2.7% C, 27% Cr), martensitic 13% chromium steel, etc. can be mentioned. .
以上の説明から明らかなように、請求項１に記載の本
発明のクラッド金属板は、母材金属板の片方の表面に、
該母材金属板より耐磨耗性の高い金属層を合せ材として
肉盛り被覆した耐磨耗性の片面肉盛りクラッド金属板で
あるにかかわらず、母材金属板と合せ材金属層との線膨
張係数の差異によって発生する応力を母材金属板が吸収
するので、クラッド時、高温使用時、冷間圧延等の加工
時における変形、割れを抑制し得る。また、変形が生じ
た場合にも、その矯正加工で割れが生じ難い。母材金属
板の開口部を空間のまま残すことにより、軽量化が図ら
れ、かつ加工性が改善される。As is clear from the above description, the clad metal plate of the present invention according to claim 1 is provided on one surface of the base metal plate,
Regardless of the abrasion-resistant single-sided clad metal plate coated with a metal layer having higher wear resistance than the base metal plate as a bonding material, the base metal plate and the bonding material metal layer Since the base metal plate absorbs the stress generated due to the difference in the coefficient of linear expansion, deformation and cracking during processing such as cladding, high-temperature use, and cold rolling can be suppressed. Also, even when deformation occurs, cracks are unlikely to occur in the straightening process. By leaving the opening of the base metal plate as a space, weight reduction is achieved and workability is improved.
請求項２に記載の本発明のクラッド鋼板は、その肉厚
方向全域に合せ材が介在するので、クラッド時や冷間圧
延時の変形、割れに対する抑止効果が特に大きい。The clad steel sheet according to the second aspect of the present invention has a particularly large effect of suppressing deformation and cracking during cladding and cold rolling, since the cladding material is interposed throughout the thickness direction.
第１図（ａ）（ｂ）は本発明のクラッド金属板の構造を
模式的に示す断面図、第２図は本発明のクラッド金属板
における母材金属板の代表例を示す斜視図、第３図は母
材金属板の厚みＴと開口率Ｏとの関係についての調査結
果を示す図表、第４図はクラッド金属板の変形を説明す
るための斜視図である。 10:クラッド金属板、11:母材金属板、11a:開口部、12:
合せ材金属層。1 (a) and 1 (b) are cross-sectional views schematically showing the structure of a clad metal plate of the present invention, FIG. 2 is a perspective view showing a representative example of a base metal plate in the clad metal plate of the present invention, FIG. 3 is a table showing the results of a study on the relationship between the thickness T of the base metal plate and the aperture ratio O, and FIG. 4 is a perspective view for explaining deformation of the clad metal plate. 10: clad metal plate, 11: base metal plate, 11a: opening, 12:
Laminated metal layer.
Claims (2)
より耐磨耗性の高い金属層を合せ材として肉盛りにより
被覆した耐磨耗性の片面肉盛りクラッド金属板であっ
て、前記母材金属板が、その両表面間を貫通する多数の
開口部を有する多孔金属板であり、且つ母材金属板の厚
みが2.4〜16mmであり、母材金属板の表面における開口
部の面積専有率が20〜60％であり、開口部の個々の面積
が0.8〜28mm2であることを特徴とするクラッド金属板。An abrasion-resistant, one-sided clad metal plate in which one surface of a base metal plate is clad with a metal layer having higher wear resistance than the base metal plate as a bonding material. The base metal plate is a perforated metal plate having a large number of openings penetrating between both surfaces thereof, and the thickness of the base metal plate is 2.4 to 16 mm, and the surface of the base metal plate is A clad metal plate wherein the area occupation ratio of the opening is 20 to 60%, and the area of each opening is 0.8 to 28 mm 2 .
されてなる請求項１に記載のクラッド金属板。2. The clad metal plate according to claim 1, wherein said bonding material is filled also in an opening of a base metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2210702A JP2717164B2 (en) | 1990-08-08 | 1990-08-08 | Clad metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2210702A JP2717164B2 (en) | 1990-08-08 | 1990-08-08 | Clad metal plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0493238A JPH0493238A (en) | 1992-03-26 |
| JP2717164B2 true JP2717164B2 (en) | 1998-02-18 |
Family
ID=16593683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2210702A Expired - Lifetime JP2717164B2 (en) | 1990-08-08 | 1990-08-08 | Clad metal plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2717164B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6071247A (en) * | 1983-09-28 | 1985-04-23 | セイコーエプソン株式会社 | Sheathed part for watch |
-
1990
- 1990-08-08 JP JP2210702A patent/JP2717164B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0493238A (en) | 1992-03-26 |
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