JPH02307688A - Production of clad steel of high joining strength - Google Patents
Production of clad steel of high joining strengthInfo
- Publication number
- JPH02307688A JPH02307688A JP12928389A JP12928389A JPH02307688A JP H02307688 A JPH02307688 A JP H02307688A JP 12928389 A JP12928389 A JP 12928389A JP 12928389 A JP12928389 A JP 12928389A JP H02307688 A JPH02307688 A JP H02307688A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- laminated
- clad steel
- layer
- spraying
- 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 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000002648 laminated material Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000011261 inert gas Substances 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000010030 laminating Methods 0.000 claims abstract 2
- 238000005507 spraying Methods 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 19
- 229910000765 intermetallic Inorganic materials 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000007751 thermal spraying Methods 0.000 abstract description 10
- 230000003064 anti-oxidating effect Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 38
- 239000010949 copper Substances 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- 239000002356 single layer Substances 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000012733 comparative method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、大気中、淡水中、海水中あるいは化学プラン
ト等が遭遇するあらゆる腐蝕環境で、優れた耐食性を発
揮する接合強度の高いクラッド鋼の製造方法に関するも
のである。Detailed Description of the Invention (Field of Industrial Application) The present invention provides a clad steel with high joint strength that exhibits excellent corrosion resistance in the atmosphere, freshwater, seawater, and any corrosive environment encountered in chemical plants. The present invention relates to a manufacturing method.
（従来の技術）
母材鋼と合わせ材（あるいは二枚の合わせ利）の中間に
媒接材を介在させ、圧延してクラッド鋼を得る技術は広
く行なわれている。たとえば特開昭６３−１４４８８１
号公報では媒接材に銅を、特公昭６３−５０１１２号公
報では合わせ祠側にニオブ、タンタル等を用い、母材鋼
側に銅、ニッケル等を用いている。(Prior Art) A technique for obtaining clad steel by interposing a medium joint material between a base steel and a composite material (or two composite materials) and rolling them is widely used. For example, JP-A-63-144881
In Japanese Patent Publication No. 63-50112, niobium, tantalum, etc. are used for the mating chamfer side, and copper, nickel, etc. are used for the base steel side.
しかし、これらの媒接材は箔であるため、合わせ材と母
材鋼の中間にはさむ組み立て作業が複雑となり人手と時
間がかかる欠点かある。またそれぞれの接合界面への異
物の飛び込み等も懸念される。However, since these intermediate materials are foils, the assembly work of sandwiching them between the laminated material and the base steel is complicated and requires a lot of labor and time. There is also a concern that foreign matter may enter the respective bonding interfaces.
さらに特開昭６３−２１５３８９号公報には、これら箔
の媒接材を用いる欠点をカバーする方法として、媒接材
に溶射層を用いる方法が開示されている。Furthermore, Japanese Patent Application Laid-open No. 63-215389 discloses a method of using a thermally sprayed layer as a foil junction material as a method of overcoming the drawbacks of using a foil junction material.
しかしながら、この方法には溶射層自身が持つ欠陥の配
慮がなされていない。However, this method does not take into account defects in the sprayed layer itself.
すなわち通常の溶射では、溶融金属は被溶射体に至る間
に大気と接するために酸化し、溶射層には必然的に酸化
物が多く含まれ、これがクラッド鋼の接合性に悪影響を
及はずことである。In other words, in normal thermal spraying, the molten metal oxidizes as it comes into contact with the atmosphere while reaching the object to be sprayed, and the sprayed layer inevitably contains a large amount of oxides, which should not have a negative effect on the bondability of the clad steel. It is.
また特開昭６３−２１５３８９号公報が指向するプラズ
マ溶射は、アーク溶射やガス溶射に比較してその操作コ
ストが数倍以上かかる難点もある。Furthermore, plasma spraying, which is disclosed in Japanese Patent Application Laid-Open No. 63-215389, has the disadvantage that the operating cost is several times higher than that of arc spraying or gas spraying.
（発明が解決しようとする課題）
本発明は上記のような問題点にかんがみ、組み立てが容
易であることはもちろん、低コストでかつ酸化物を殆ん
ど含有しない清浄な溶射層を中間媒接材を施して、接合
強度の高いクラッド鋼の製造方法を提供せんとするもの
である。(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention is not only easy to assemble, but also uses a clean thermal sprayed layer that is low in cost and contains almost no oxides as an intermediate bond. The present invention aims to provide a method for manufacturing clad steel with high bonding strength.
（課題を解決するための手段）
すなわち、本発明の要旨は、二枚の合わせ利のいずれか
一方の表面に、不活性ガス被包中てアトマイズガスに不
活性ガスを使用するアーク溶射法あるいは還元性ガス炎
のガス溶射法で清浄な単層溶射層すなわち難酸化性金属
を形成し、この溶射層を中間媒接材にして他方の合わせ
祠を重ね合わせ、加熱し圧延するクラッド鋼を製造する
方法および上記と同じ溶射方法により、一方の合わせ利
の表面に該合わせ材と脆い金属間化合物を生じない金属
溶射層を形成し、さらにその上に該溶射層および他方の
合わせ利と脆い金属間化合物を生じない金属溶射層を積
層する二層の中間媒接材を形成したのち、他方の合わせ
祠を重ね合わせて加熱し、圧延によってクラッド鋼を製
造する方法である。(Means for Solving the Problems) That is, the gist of the present invention is to apply an arc spraying method or A clean single-layer sprayed layer, that is, a non-oxidizable metal, is formed using a gas spraying method using a reducing gas flame, and this sprayed layer is used as an intermediate bonding material to overlap the other joint, which is then heated and rolled to produce clad steel. By using the same method as above and the same thermal spraying method as above, a metal sprayed layer that does not form a brittle intermetallic compound with the laminated material is formed on the surface of one of the laminated materials, and a metal sprayed layer that does not form a brittle intermetallic compound with the laminated material is further formed on the surface of the laminated material. This is a method of manufacturing clad steel by forming a two-layer intermediate welding material that laminates metal sprayed layers that do not produce interlayer compounds, then stacking the other laminated steel, heating it, and rolling it.
（作 用） 以下本発明について詳細に説明する。(for production) The present invention will be explained in detail below.
機械的あるいは化学的に清浄にした例えば鋼、チタン、
キュプロニッケルなどの合わせ材の一方の表面に、Ａ
ｒ ＋ Ｎ ２などの不活性ガス被包中のアーク溶射
あるいは還元性ガス炎のガス溶射で、酸化物を殆んど含
有しない極めて清浄なＣｕ。mechanically or chemically cleaned e.g. steel, titanium,
A on one surface of the laminated material such as cupronickel.
Extremely clean Cu containing almost no oxides by arc spraying or reducing gas flame gas spraying in an inert gas encapsulation such as r+N2.
Ｎｉ、Ａｇ等の溶射層を形成する。A sprayed layer of Ni, Ag, etc. is formed.
しかるのち、この清浄な溶射層を中間媒接材として、他
方の合わせ材を重ね合わせ、全周溶接を施して単一構造
体に組み立て、加熱し圧延によってクラッド鋼を製造す
る。Then, using this clean sprayed layer as an intermediate welding material, the other bonding material is superimposed, welded all around, assembled into a single structure, heated and rolled to produce clad steel.
本発明では、中間媒接材のＣｕ、Ｎｊ等の溶射層に酸化
物を生成しないように制御する必要がある。すなわち、
通常のアーク溶射ではアトマイズに圧縮空気を用い、さ
らに溶融金属が被溶射体に至る間に大気と接触するため
に、形成された溶射層には多くの酸化物を含有して接合
強度を弱める。In the present invention, it is necessary to control so as not to generate oxides in the sprayed layer of Cu, Nj, etc. of the intermediate welding material. That is,
In normal arc spraying, compressed air is used for atomization, and since the molten metal comes into contact with the atmosphere while reaching the object to be sprayed, the sprayed layer that is formed contains many oxides, weakening the bonding strength.
また通常のガス溶射においても、中性のガス炎と被溶射
体に至る間の大気との接触によって溶融金属の酸化が生
じる。Also in normal gas spraying, oxidation of the molten metal occurs due to contact between the neutral gas flame and the atmosphere leading to the object to be sprayed.
本発明者らは種々の実験を重ねた結果、溶射層に酸化物
が多く存在すると延性と密着性を阻害することを見出し
、クラッド鋼の接合強度を向上させるためには、溶射層
の酸化物を零もしくはこく微量に制御することが必須で
あるという知見を得た。As a result of various experiments, the present inventors found that the presence of a large amount of oxides in the sprayed layer inhibits ductility and adhesion.In order to improve the bonding strength of clad steel, it is necessary to We obtained the knowledge that it is essential to control the amount to zero or a very small amount.
本発明はこの溶射層の酸化物生成対策として、上記のよ
うな不活性ガス被包中でアーク溶射のアトマイズガスに
は不活性ガスを使用し、あるいはガス溶射をする場合に
はさらに還元性ガス火炎を使用することにより、清浄な
溶射層の形成に到達したものである。In order to prevent the formation of oxides in the sprayed layer, the present invention uses an inert gas as the atomizing gas for arc spraying in the above-mentioned inert gas encapsulation, or further uses a reducing gas when performing gas spraying. By using flame, it was possible to form a clean sprayed layer.
酸化物極少のＣｕもしくはＮｉ等の単層溶射層を中間媒
接材とした場合でも、合わせ材との間で脆い金属間化合
物を生成して展延性を害することがある。たとえば清浄
なＮｉ溶射層を中間媒接材としても合わせ材がＴｉの場
合にはＮｊ／Ｔｉ界面で、清浄なＣｕ溶射層を中間媒接
材としても、合わせ材がＳ Ｕ Ｓ ３０４の場合には
Ｓ Ｕ Ｓ ３０４／Ｃｕ界面での圧延後の接合性が不
充分になる。Even when a single-layer thermally sprayed layer of Cu or Ni with minimal oxides is used as an intermediate bonding material, brittle intermetallic compounds may be formed with the bonding material, impairing the spreadability. For example, if a clean Ni sprayed layer is used as an intermediate welding material and the bonding material is Ti, then at the Nj/Ti interface, a clean Cu sprayed layer is used as an intermediate bonding material and the bonding material is SUS 304. In this case, the bondability after rolling at the SUS 304/Cu interface becomes insufficient.
このような欠点を排除する為には、一方の合わせ祠側に
接する中間媒接材をそれぞれに相性のよい（脆い金属間
化合物を作らない）ものにする必要かある。すなわち、
まず被溶射体と相性のよい金属を、特定したアーク溶射
あるいはガス溶射で合わせ利の表面に溶射して清浄な溶
射層を形成し、さらにその上に該溶射層および他方の合
わせ祠と相性の良い金属を同一溶射方法で積層溶射する
。In order to eliminate such drawbacks, it is necessary to make the intermediate bonding materials that are in contact with one of the mating holes compatible with each other (do not form brittle intermetallic compounds). That is,
First, a metal that is compatible with the object to be thermally sprayed is sprayed onto the surface of the joint using specified arc spraying or gas spraying to form a clean sprayed layer, and then a metal that is compatible with the sprayed layer and the other joint is applied on top of that. Laminated thermal spraying of good metals using the same thermal spraying method.
しかるのち二層からなる溶射層を中間媒接材として、他
方の合わせ材を重ね合わせ、全周を溶接して、加熱し、
圧延してクラッド鋼を製造する。Then, using the two-layer thermal sprayed layer as an intermediate welding material, the other laminated material is overlapped, the entire circumference is welded, and heated.
It is rolled to produce clad steel.
かかる方法で製造したクラッド鋼は、一方の合わせ材／
中間媒接材、中間媒接材／他方の合わせ材のそれぞれの
界面の冶金結合が強化されて、接合強度の高いものが得
られる。The clad steel manufactured by this method is one of the laminated materials/
The metallurgical bond at the interface between the intermediate welding material and the intermediary welding material/the other bonding material is strengthened, resulting in a high bonding strength.
（実 施 例） 表１−１．１−２に実施例を示す。(Example) Examples are shown in Table 1-1.1-2.
表１−１記号Ａは中間媒接材が単層の場合の、比較法で
製造したものであるが、通常のアーク溶射で溶射層を形
成したために、溶射層に酸化物を多く含有している。こ
のため圧延後の接合力が低く、その剪断強さはＪＩＳ規
格の１４ｋｇ ｆ ／−以下である。Table 1-1 Symbol A is manufactured using a comparative method when the intermediate welding material is a single layer, but because the sprayed layer was formed by normal arc spraying, the sprayed layer contained a large amount of oxides. There is. Therefore, the bonding force after rolling is low, and the shear strength is less than 14 kg f /- of the JIS standard.
記号Ｂ、Ｃも同じく単層の場合の比較法で製造したもの
で、記号Ｂはアーク溶射のときアトマイズガスにのみＡ
ｒを用いたもの、記号ＣはアトマイズガスはＡｉｒでＡ
ｒシールドのみ実施したものであるが、いずれも溶射層
の酸化物の軽減が不充分のために、剪断強さは規格下限
以下となる。Symbols B and C are also manufactured using the comparative method for single layer, and symbol B is manufactured by A only for atomized gas during arc spraying.
The one using r, the symbol C is the atomizing gas is Air and A
Only the r-shield was implemented, but in both cases the shear strength was below the lower limit of the specification because the reduction of oxides in the sprayed layer was insufficient.
一方、記号Ｄ−Ｇは本発明法で製造した中間媒接材が単
層の場合であるが、溶射条件を特定して、アトマイズガ
スにＡｒまたはＮ２を用い、かつ同一ガスで溶融金属の
周囲をシールドして溶射層を形成しているため素地との
密着力も大で、酸化物も殆ど生成しないことから、製品
の剪断強さはＪ工Ｓ規格を大幅に上回り、その接合強度
は極めて優れている。On the other hand, symbols D-G indicate the case where the intermediate welding material produced by the method of the present invention is a single layer, but by specifying the thermal spraying conditions, Ar or N2 is used as the atomizing gas, and the same gas is used to surround the molten metal. Since the sprayed layer is formed by shielding the material, it has great adhesion to the base material, and almost no oxides are generated, so the shear strength of the product greatly exceeds the J Engineering S standard, and its bonding strength is extremely excellent. ing.
また記号Ｈは溶射方法を特定したにもかかわらず、合わ
せ材のＴｉと中間媒接材Ｎ１の相性か悪い（脆い金属間
化合物を生成する）ために剪断強さが低い、同じく記号
■は母材鋼Ｓ Ｕ Ｓ ３０４と中間媒接材Ｃｕとの相
性が悪いために剪断強さが低下した例である。In addition, despite the specified thermal spraying method, the symbol H has low shear strength due to poor compatibility between the bonding material Ti and the intermediate welding material N1 (creating brittle intermetallic compounds); This is an example in which the shear strength decreased due to poor compatibility between the steel SUS 304 and the intermediate welding material Cu.
これに対して記号Ｊは母材鋼Ｓ Ｕ Ｓ ３０４の表面
に特定したアーク溶射て第一層媒接材のＮｉ溶射層を形
成し、さらにその上に合わせ材のＴｉ と接する第二層
媒接材のＣｕ溶射層を積層ビで、重ね合わせ、組み立て
、加熱し圧延したものである。On the other hand, with symbol J, a Ni thermally sprayed layer of the first layer welding material is formed by arc spraying on the surface of the base steel SUS 304, and then a second layer welding material in contact with Ti of the laminated material is applied on top of the Ni thermally sprayed layer. The copper sprayed layer of the contact material is laminated using vinyl lamination, assembled, heated, and rolled.
この場合には母材Ｉｆｊ４／ Ｎ １ ％ Ｎ ｌ ／
Ｃｕ ｓＣｕ／Ｔｉ間で脆い金属間化合物を生成しな
いために、製品の剪断強さが大幅に向上してＪＩＳ規格
を充分に上回る。In this case, the base material Ifj4/ N 1 % N l /
Since brittle intermetallic compounds are not generated between Cu sCu/Ti, the shear strength of the product is significantly improved and fully exceeds the JIS standard.
表１−２記号ａは通常のガス溶射てＣｕ単層の中間媒接
材を形成し、組み立て、加熱し圧延したものであるが、
溶射層の酸化物が起因の剪断強さの低下が生じている。Symbol a in Table 1-2 is one in which a Cu single-layer intermediate welding material is formed by ordinary gas spraying, assembled, heated, and rolled.
The shear strength is reduced due to oxides in the sprayed layer.
また記号すはガス炎を還元性に保持した場合、記号Ｃは
ガス炎は中性で溶融金属をＡｒでシールした場合の結果
であるが、やはり酸化物の軽減が不充分のため接合強度
が低く、剪断強さはいずれもＪＩＳ規格下限以下である
。Also, symbol 2 is the result when the gas flame is kept reducing, and symbol C is the result when the gas flame is neutral and the molten metal is sealed with Ar, but the joint strength is still low due to insufficient reduction of oxides. Both shear strengths are below the lower limit of JIS standards.
これに対して記号ｄ−ｇは本発明で製造したもので、ガ
ス溶射条件を特定して酸化物を殆ど含まない清浄な溶射
層を中間媒接材としているために、−つ −
その剪断強さは大幅に向上してＪＩＳ規格を充分上回る
。On the other hand, symbols d-g are manufactured according to the present invention, and because the gas spraying conditions are specified and a clean sprayed layer containing almost no oxides is used as the intermediate bonding material, - The quality has been significantly improved and fully exceeds the JIS standard.
また記号りは本発明法の二層からなる中間媒接材方式で
製造したクラッド鋼であるが、溶射層か清浄であること
に加えて母４．ｌ’ｌｉｌ／ Ｓ ＩＪ Ｓ ３０４、
Ｎｉ ／Ｔｉ 、 Ｔｉ ／合わせ旧のそれぞれの界面
の接合強度を高めているため、その剪断強さはＪＩＳ規
格を充分に上回っている。Also, the symbol is clad steel manufactured by the two-layer intermediate welding method of the present invention, but in addition to the thermal sprayed layer being clean, the base material is 4. l'lil/ S IJ S 304,
Since the bonding strength of the Ni/Ti and Ti/old interfaces is increased, the shear strength sufficiently exceeds the JIS standard.
（発明の効果）
本発明は酸化物を殆ど含有しない清浄な溶着層を積層し
て中間媒接祠とするので、冶金結合が強化されて、接合
強度が高いクラッド鋼が得られる。(Effects of the Invention) In the present invention, a clean weld layer containing almost no oxides is laminated to form an intermediate bond, so that the metallurgical bond is strengthened and a clad steel with high bonding strength can be obtained.
Claims (1)
イズガスに不活性ガスを使用するアーク溶射または還元
性ガス炎のガス溶射によって難酸化性金属の中間媒接材
を積層した後、他方の合わせ材を重ね合わせ、その合わ
せ面を全周溶接し、続いて加熱し圧延することを特徴と
する接合強度の高いクラッド鋼の製造方法。 ２、合わせ材の一方の表面に不活性ガス被包中でアトマ
イズガスに不活性ガスを使用するアーク溶射または還元
性ガス炎のガス溶射によって、該合わせ材と脆い金属間
化合物を生じない金属溶射層、さらにその上に該溶射層
および他方の合わせ材と脆い金属間化合物を生じない金
属溶射層を積層する二層の中間媒接材を形成したのち、
他方の合わせ材（または母材鋼）を重ね合わせ、その合
わせ面を全周溶接し、続いて加熱し圧延することを特徴
とする接合強度の高いクラッド鋼を製造する方法。[Claims] 1. Intermediate welding of oxidizable metal onto one surface of the laminated material by arc spraying using an inert gas as an atomizing gas or gas spraying with a reducing gas flame while encapsulating an inert gas. A method for manufacturing clad steel with high joint strength, which comprises: laminating materials, then overlapping the other laminated material, welding the mating surfaces all around, and then heating and rolling. 2. Metal spraying that does not produce brittle intermetallic compounds with the laminated material by arc spraying or reducing gas flame gas spraying using an inert gas as the atomizing gas in an inert gas encapsulation on one surface of the laminated material. After forming a two-layer intermediate welding material on which a metal sprayed layer that does not form brittle intermetallic compounds with the sprayed layer and the other bonding material is laminated,
A method for manufacturing clad steel with high joint strength, which is characterized by stacking the other laminate (or base steel), welding the mating surfaces all around, and then heating and rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12928389A JPH02307688A (en) | 1989-05-23 | 1989-05-23 | Production of clad steel of high joining strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12928389A JPH02307688A (en) | 1989-05-23 | 1989-05-23 | Production of clad steel of high joining strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02307688A true JPH02307688A (en) | 1990-12-20 |
Family
ID=15005755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12928389A Pending JPH02307688A (en) | 1989-05-23 | 1989-05-23 | Production of clad steel of high joining strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02307688A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5539383A (en) * | 1978-09-14 | 1980-03-19 | Toshiba Corp | Thermal head |
| JPS60244490A (en) * | 1984-05-18 | 1985-12-04 | Nippon Kokan Kk <Nkk> | Production of clad steel plate |
| JPS63160828A (en) * | 1986-12-24 | 1988-07-04 | 住友金属工業株式会社 | Titanium-clad steel material and manufacture thereof |
-
1989
- 1989-05-23 JP JP12928389A patent/JPH02307688A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5539383A (en) * | 1978-09-14 | 1980-03-19 | Toshiba Corp | Thermal head |
| JPS60244490A (en) * | 1984-05-18 | 1985-12-04 | Nippon Kokan Kk <Nkk> | Production of clad steel plate |
| JPS63160828A (en) * | 1986-12-24 | 1988-07-04 | 住友金属工業株式会社 | Titanium-clad steel material and manufacture thereof |
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