JPS63149091A - Production of clad steel plate - Google Patents
Production of clad steel plateInfo
- Publication number
- JPS63149091A JPS63149091A JP29422386A JP29422386A JPS63149091A JP S63149091 A JPS63149091 A JP S63149091A JP 29422386 A JP29422386 A JP 29422386A JP 29422386 A JP29422386 A JP 29422386A JP S63149091 A JPS63149091 A JP S63149091A
- Authority
- JP
- Japan
- Prior art keywords
- cladding
- composite
- weight
- base material
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005253 cladding Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 53
- 230000013011 mating Effects 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 16
- 239000002648 laminated material Substances 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 abstract description 10
- 229910052710 silicon Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000010953 base metal Substances 0.000 abstract description 4
- 238000005304 joining Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、クラッド鋼板の製造法に関し、特に合せ面の
清浄化工程を省略できにようにしたクラッド鋼板の製造
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a clad steel plate, and particularly to a method for producing a clad steel plate in which a cleaning step of mating surfaces can be omitted.
従来、圧延クラッド鋼板の製造に当たっては、母材およ
び合せ材のお互いの合せ面を清浄にすることが必要であ
った。Conventionally, in manufacturing rolled clad steel plates, it has been necessary to clean the mating surfaces of the base material and the cladding material.
例えば特開昭５５−１２８３９０号公報に示される従来
の極厚クラッド鋼板の製造方法では、炭素鋼又は低合金
鋼母材と、ステンレス鋼あるいは工具鋼等の高合金鋼の
合せ材とからなる極厚クラ７ドＥｔｆｆｌを製造するに
当たって、母材及び合せ材の合せ面を清浄にして重ね合
わせ、その合せ面の周囲を軟鋼若しくは母材と同材質の
接合板によって密封溶接し、この接合板によって包囲さ
れた母材と合せ材との間の接着面を含む密閉空間内の空
気を不活性ガスによって置換した後、加熱１圧延するよ
うにしていた。For example, in the conventional manufacturing method for extra-thick clad steel sheets disclosed in Japanese Patent Application Laid-Open No. 55-128390, a plate consisting of a base material of carbon steel or low alloy steel and a laminate of high alloy steel such as stainless steel or tool steel is used. In manufacturing thick cladding Etffl, the mating surfaces of the base material and the cladding material are cleaned and overlapped, the periphery of the mating surface is hermetically welded with a joining plate made of mild steel or the same material as the base material, and this joining plate is used. After the air in the sealed space including the bonding surface between the surrounded base material and the laminate was replaced with an inert gas, heating and rolling was performed.
しかし、従来の製造方法では、合せ面を清浄化するには
表面の酸化皮膜（スケール）を研磨、研削、ショットプ
ラスティング。酸洗等の機械的又は化学的手段、又はそ
の両方の手段で除去することが必要であり、そのため製
作するクラフト鋼板の面積が大きくなるにつれて、合せ
面を清浄にするための費用は多大なものとなり、且つ生
産性も低下してくる。However, in conventional manufacturing methods, cleaning the mating surfaces requires polishing, grinding, and shot-plasting to remove the oxide film (scale) on the surface. It is necessary to remove it by mechanical or chemical means such as pickling, or both, and therefore, as the area of the craft steel plate to be manufactured increases, the cost of cleaning the mating surfaces increases. As a result, productivity also decreases.
本発明は上記した従来の問題点を解決し、高い生産性を
得ることを可能とする新しいクラフト日板の製造法を提
案することを目的としたものである。The object of the present invention is to solve the above-mentioned conventional problems and to propose a new method for producing craft date boards that makes it possible to obtain high productivity.
そして本発明者はこの目的を達成すべく鋭意検討を重ね
た結果、母材および合せ材の合せ面の清浄化、即ち酸化
皮膜の除去は、圧延時の母材および合せ材を重ね合せ、
その四周の合せ面を接合・密閉した材料（以下、コンポ
ジットと記す。）の加熱条件を通常の加熱条件より高温
、長時間とすることにより可能であること見出し、本発
明を完成させた。As a result of extensive studies to achieve this objective, the inventor of the present invention found that the cleaning of the mating surfaces of the base material and the laminate, that is, the removal of the oxide film, is achieved by overlapping the base material and the laminate during rolling.
The inventors discovered that it is possible to heat a material (hereinafter referred to as a composite) in which the mating surfaces of the four circumferences are joined and sealed (hereinafter referred to as a composite) at a higher temperature and for a longer period of time than normal heating conditions, and have completed the present invention.
即ち、従来の圧延クラッド法では、母材および合せ材の
合せ面に付着しているスケールはクラッド圧延に際して
は表面の活性化を阻害し、母材および合せ材の接着性を
劣化させるので、この合せ面のスケールを機械的又は化
学的手段で、又はその両方の手段で除去し、合せ面を清
浄化してコンポジットを作成していた。In other words, in the conventional rolling cladding method, scale adhering to the mating surfaces of the base material and cladding material inhibits surface activation during cladding rolling and deteriorates the adhesion between the base material and cladding material. The scale on the mating surfaces was removed by mechanical or chemical means, or both, and the mating surfaces were cleaned to create a composite.
これに対し、本発明者はこの合せ面の表面の清浄化につ
いて注目し、各種の方法について実験を行い、その結果
下記の新しい知見を得た。外気との交流を遮断され、か
つ大気の混入している又は真空に引かれている密閉空間
において、鋼の表面の酸化皮１１９！（スケール）は圧
延前のコンポジットの加熱により還元除去することが可
能である。On the other hand, the present inventor paid attention to cleaning the surface of this mating surface, conducted experiments on various methods, and obtained the following new knowledge as a result. Oxidized skin on the surface of steel 119! (Scale) can be reduced and removed by heating the composite before rolling.
炭素鋼での例を取り上げて、コンボシフ）内の密閉空間
における酸化皮膜の消失の機構については次のように考
える。Taking the example of carbon steel, the mechanism of the disappearance of the oxide film in the closed space inside a combo box is considered as follows.
（１１ｍの母材および合せ材の両者の合せ面はスケール
が付着したままであり、その四周は接合されており、従
って合せ面は密閉空間となっている。(Scale remains attached to the mating surfaces of both the 11 m base material and the mating material, and the four circumferences are joined, so the mating surfaces are a sealed space.
（２） クランド圧延に際し、加熱炉で加熱されると
母材および合せ材には次の反応が生じる。(2) During crund rolling, the following reactions occur in the base material and the laminate when heated in a heating furnace.
■ 通常の加熱温度以上の温度域でコンポジットを所定
以上の任意の時間保持することにより、オーステナイト
化した母材および合せ材と、その材料に付着しているス
ケールとの界面反応が生じる。■ By holding the composite at a temperature higher than the normal heating temperature for a predetermined period of time, an interfacial reaction occurs between the austenitized base material and composite material and the scale attached to the materials.
母材および合せ材より、その各々に付着しているスケー
ルの界面に向かって母材および合せ材のオーステナイト
＆１ＩＶ６中をＣ，Ｓｉ 、Ｍｎの原子が拡散移動する
。その結果、スケールを形成しているＦｅｔＯｘ及びＦ
ｅ５Ｏｓ は母材および合せ材より拡散して来たＳｉ及
びＭｎにより、母材および合せ材と接している界面側よ
り逐次、下記の反応によって還元され、ｉ終的にはスケ
ールが消失すると考えられる。Atoms of C, Si, and Mn diffuse through the austenite &1IV6 of the base material and the composite material toward the interface of the scales attached to each of them. As a result, FetOx and F which form the scale
It is thought that e5Os is reduced by the Si and Mn that have diffused from the base material and the composite material from the interface side where it is in contact with the base material and the composite material through the following reaction, and eventually the scale disappears. .
ＦｅｚＯｘ又はＦｅｘＯａ−ＦｅＯ→Ｆｅまた、還元に
より生じた酸素、０はＭｎおよびＳｉ と結合して、Ｍ
ｎおよびＳｔ との酸化物を形成し、オーステナイト中
に微細な介在物として存在する（第２図ｆａｔ参照）。FezOx or FexOa-FeO→FeAlso, oxygen generated by reduction, 0, combines with Mn and Si to form M
It forms an oxide with n and St, and exists as fine inclusions in austenite (see fat in Figure 2).
■ 従来、高温加熱により鋼の母材および合せ材よりＳ
ｉ、Ｍｎ原子がスケールの界面に向かって拡散・移動し
、かつスケールを還元するという報告はなく、これは本
発明者が実験を通して得た新しい知見である０本発明は
この新しい知見に基づいているものである。■ Conventionally, high-temperature heating was used to reduce S from steel base materials and laminated materials.
There is no report that Mn atoms diffuse and move toward the scale interface and reduce the scale, and this is a new finding that the inventor obtained through experiments.The present invention is based on this new finding. It is something that exists.
そこでこの発明に係るクラッド鋼板の製造法は、Ｃ：５
１．０重量％、Ｓｔ ：０．０５〜１．０重量％、Ｍｎ
：０．３０〜２．５重量％、Ｎｉ 十Ｃｒ ： ≦１
Ｏ１０重四％を含み、さらにＣｕ ：５２．０重量％、
ＭＯ：≦１．０重量％、Ｎｂ：５０．１重量％、■：≦
Ｏ３１重量％の１種又は２種以上を含み、残部鉄および
不可避的不純物よりなる鋼の母材及び合せ材からなるク
ラッド鋼板反を製造するに当たって、母材および合せ材
の相互の合せ面を圧延のまま、又は熱処理のまま、即ち
酸化皮膜付着のままで重ね合せ、その合せ面の全周縁を
接合密閉し、１１５０℃以上の温度で、式Ｔ −０，０
４ｔ （但し、Ｔは保持時間で、かつＴ≧１時間であ
り、ｔはコンポジット（クラッド材）の厚さくａｍ）で
ある、）で表される時間以上に加熱保持し、しかる後圧
延接合するようにしたものである。Therefore, the method for manufacturing a clad steel plate according to the present invention is as follows: C:5
1.0% by weight, St: 0.05-1.0% by weight, Mn
: 0.30 to 2.5% by weight, Ni + Cr: ≦1
Contains 10% by weight of O, and further includes Cu: 52.0% by weight,
MO:≦1.0% by weight, Nb: 50.1% by weight, ■:≦
In manufacturing a clad steel plate consisting of a steel base material and a cladding material containing one or more types of O31% by weight, the balance being iron and unavoidable impurities, the mutual mating surfaces of the base material and cladding material are rolled. They are stacked as they are or as they are heat treated, that is, with the oxide film still attached, and the entire periphery of the mating surfaces is bonded and sealed, and at a temperature of 1150°C or higher, the formula T -0,0
4t (where T is the holding time, T≧1 hour, and t is the thickness of the composite (cladding material), am)), and then rolled and bonded. This is how it was done.
ここでコンポジット内の密閉空間における母材および合
せ材のスケール除去のための条件は、母材および合せ材
の成分、加熱温度及び１保持時間によって決定されるの
で、以下、成分、加熱温度。Here, the conditions for removing scale from the base material and cladding materials in the closed space within the composite are determined by the components of the base material and cladding materials, heating temperature, and one holding time.
保持時間の限定理由について述べる。The reasons for limiting the retention time will be explained.
ＣＴＣは基本的には鋼の強化元素として含有されており
、又本発明の方法ではＣ： １．０％まではスケールが
除去され、かつ圧延で接合されるので、Ｃの上限は１．
０％とする。なおＣの下限については母材および合せ材
の組合せにより、上記の１．０％以下であれば、いかな
るＣＭでも接合可能であるので、特に下限は規定しない
。CTC is basically contained as a reinforcing element in steel, and in the method of the present invention, scale is removed up to 1.0% C and joined by rolling, so the upper limit of C is 1.0%.
Set to 0%. Regarding the lower limit of C, there is no particular lower limit specified because any CM can be joined as long as it is 1.0% or less depending on the combination of the base material and the bonding material.
Ｓｉ：Ｓｉ は上述の反応機構で具体的に示されている
様に、鋼板表面のスケールの還元に当たっては重要な役
割を果たしている。従ってＳｉｌが少ないと、高温加熱
中にオーステナイト中での量的な面でのＳｉの充分な拡
散・移動が行われず、そのため充分な還元反応が生じな
いことなる。この理由によりＳｉの下限は０．０５％と
し、上限は島状スケール等の特殊スケールの生成しない
範囲という観点より１．０％とする。この値を越えると
特殊スケールが充分に除去されず、クラッド圧延で接合
しない。Si: As specifically shown in the reaction mechanism described above, Si plays an important role in reducing scale on the surface of the steel sheet. Therefore, if the amount of Sil is small, sufficient quantitative diffusion and movement of Si in austenite will not occur during high-temperature heating, and therefore a sufficient reduction reaction will not occur. For this reason, the lower limit of Si is set to 0.05%, and the upper limit is set to 1.0% from the viewpoint of preventing the formation of special scales such as island scales. If this value is exceeded, the special scale will not be removed sufficiently and will not be joined by clad rolling.
Ｍｎ：ＭｎはＳｉ と同様に鋼板の表面のスケールを還
元する元素である。しかしＳｉ と比較するとその還元
能力は小さい、従ってＭｎ１ｉの下限は０．３０％とし
、上限は母材および合せ材となる鋼材の強度・靭性の確
保およびスケールの除去性という点より２４５％とする
。この値以上ではスケールが充分に除去されず、クラフ
ト圧延で接合しない。Mn: Like Si, Mn is an element that reduces scale on the surface of a steel sheet. However, compared to Si, its reducing ability is small. Therefore, the lower limit of Mn1i is set at 0.30%, and the upper limit is set at 245% from the viewpoint of ensuring the strength and toughness of the steel materials used as the base material and bonding material, and the ability to remove scale. . If the value exceeds this value, scale will not be removed sufficiently and bonding will not be possible by craft rolling.
Ｎｉ、Ｃｒ ： Ｎｉ＋Ｃｒについては、これらの元
素を多量に含有する鋼は表面にＮｉ、Ｃｒを含む特殊な
酸化皮膜を形成するので、本発明による反応機構では、
Ｎｉ ＋Ｃｒの合計量が１０％を越えると、スケールの
還元が非常に困難となり、圧延で接合しなくなる。従っ
てＮｉ＋Ｃｒの量の上限を１０％とした。ＮｉとＣｒと
が複合して含有されていなければ特に問題はないので、
下限はとくに設定しない。Ni, Cr: Regarding Ni+Cr, since steel containing large amounts of these elements forms a special oxide film containing Ni and Cr on the surface, the reaction mechanism according to the present invention
If the total amount of Ni + Cr exceeds 10%, it will be very difficult to reduce the scale, and it will not be possible to join by rolling. Therefore, the upper limit of the amount of Ni+Cr was set at 10%. There is no particular problem as long as Ni and Cr are not contained in combination.
No particular lower limit is set.
Ｃｕ＋ Ｍａｔ Ｎｂ、 Ｖ ： Ｃｕ＋ Ｍｏ、 Ｎ
ｂ、 Ｖについては母材および合せ材の強度および靭性
の向上環を狙って１種又は０１以上が含有されているが
、以下の理由で各々の添加元素の上限を規定した。即ち
、Ｃｕを多量に添加すると綱の表面疵が発生する点を、
Ｍｏは多量に添加しても靭性が飽和する点を、Ｎｂは綱
材の強化、結晶の細粒化に有効であるが、添加量が０．
１％を越えるとその効果は飽和するという点を、又Ｖに
ついては強化効果はあるが、添加量が０．１％を越える
と靭性が劣化するという点をそれぞれ考慮したものであ
る。Cu+ Mat Nb, V: Cu+ Mo, N
Regarding b and V, one type or 01 or more is contained with the aim of improving the strength and toughness of the base material and composite material, but the upper limit of each additive element was specified for the following reason. In other words, adding a large amount of Cu causes surface flaws in the steel.
Even if Mo is added in a large amount, the toughness is saturated, and Nb is effective in strengthening the wire and refining the crystal grains, but if the amount added is 0.
This takes into consideration the fact that the effect is saturated when the amount exceeds 1%, and the fact that although V has a strengthening effect, when the amount added exceeds 0.1%, the toughness deteriorates.
また加熱温度は、母材および合せ材の成分系、Ｓｉおよ
びＭｎの拡散条件および圧延条件により決定される。本
発明者が実施した実験結果によると、加熱温度の下限は
１１５０℃とすることが適切であり、この温度未満では
充分なＳｉ、Ｍｎの拡散・移動が行われず、従ってスケ
ールの還元は不充分なものとなり接合も不充分なものと
なる。Further, the heating temperature is determined by the component systems of the base material and the composite material, the diffusion conditions of Si and Mn, and the rolling conditions. According to the experimental results conducted by the present inventor, it is appropriate to set the lower limit of the heating temperature to 1150°C; below this temperature, sufficient diffusion and movement of Si and Mn will not occur, and therefore scale reduction will be insufficient. This results in insufficient bonding.
また加熱時間は、母材および合せ材の合計量、即ちコン
ポジット厚、加熱能力及びＳｉ、Ｍｎの拡散速度により
決定される０本発明者は加熱温度１１５０℃においてコ
ンポジット厚を変えて、その厚さにおけるスケールの還
元に要する加熱保持時間を求めた。実験結果を第１図に
示す、実験によれば、加熱炉内の保持時間は保持温度に
より異なるが、加熱温度が１１５０℃以上であればコン
ポジット厚さ１Ｉｌｌｌについて２．４分以上とするこ
とでより好ましい結果が得られた。但し、加熱保持時間
は最低１時間以上が必要であった。The heating time is determined by the total amount of the base material and the composite material, that is, the composite thickness, the heating capacity, and the diffusion rate of Si and Mn. The heating retention time required for scale reduction was determined. The experimental results are shown in Figure 1.According to the experiment, the holding time in the heating furnace varies depending on the holding temperature, but if the heating temperature is 1150°C or higher, the heating time should be 2.4 minutes or more for a composite thickness of 1Illll. More favorable results were obtained. However, the heating and holding time was required to be at least 1 hour.
この発明においては、岡の母材および合せ材からなるク
ラッド調板を製造するに当たって、母材および合せ材は
酸化皮膜が付着したままの表面として重ね合せ、その四
周を接合密閉し、所定の時間及び温度で加熱するように
したことから、母材および合せ材の成分、特にＳｉ、Ｍ
ｎと酸化皮膜との間で還元反応が起こり、これにより酸
化皮膜が消失する。そしてこの酸化皮膜が消失した後、
クラッド圧延するようにしたことから、表面の清浄化を
行うことなく母材および合せ材が接合され、このように
して清浄化工程を省略でき、クラッド鋼板の生産性を向
上できるものである。In this invention, in manufacturing a clad panel made of a base material and a laminate material, the base material and the laminate material are overlapped with the surface with the oxide film still attached, the four circumferences are bonded and sealed, and a predetermined period of time is applied. Since the heating is performed at a temperature of
A reduction reaction occurs between n and the oxide film, and the oxide film disappears. After this oxide film disappears,
Since clad rolling is used, the base material and the laminate material are joined without cleaning the surface, thus the cleaning step can be omitted, and the productivity of the clad steel sheet can be improved.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１表は本発明に従った供試鋼（第１表のＡ、 ８゜Ｃ
，Ｅ、Ｆ、Ｈ，Ｉ、Ｊ、に、Ｍ、Ｏ）及び比較Ｆｌ（第
１表のり、Ｇ、Ｌ。Table 1 shows the test steel according to the present invention (A in Table 1, 8°C
, E, F, H, I, J, Ni, M, O) and comparison Fl (Table 1 Nori, G, L.
Ｎ、Ｐ）の化学成分を示す、ここで比較ｆｆＤは加熱温
度が本発明より低く、また比較ＥＣ，Ｌ、 Ｎ、 Ｐ
はそれぞれＳｉ、Ｍｎ、Ｎｉ ＋Ｃｒ、Ｃｕの含有量が
本発明範囲にない場合の例である。そしてこれらの供試
鋼及び比較鋼によって１２０ｍ＋ｍ（母材１０〇−１、
合せ材２０１）の厚さのコンポジットを作成し、これを
第２表に示す条件で加熱した後、圧延によって厚さ２５
１のクラッド鋼板に仕上げ、各々の接合率を調べた。接
合率は圧延後クラッド日板の合せ材側より表面を１００
％走査した結果であり、それを第２表右端欄に示す。N, P), where comparative ffD has a lower heating temperature than the present invention, and comparative EC, L, N, P).
are examples in which the contents of Si, Mn, Ni + Cr, and Cu are not within the range of the present invention. Using these test steels and comparative steels, the distance of 120m+m (base material 100-1,
A composite with a thickness of 201) was prepared, heated under the conditions shown in Table 2, and then rolled to a thickness of 25.
No. 1 clad steel plate was finished, and the bonding rate of each was examined. The bonding rate is 100% on the surface from the laminate side of the clad plate after rolling.
% scanning results, which are shown in the rightmost column of Table 2.
上記第１．第２表から明らかなように、比較鋼では４５
％以下の接合率しか得られていないのに対し、供試鋼で
はほぼ１００％の接合率が得られている。即ち、本発明
の方法によってクラッド鋼板製造工程における母材およ
び合せ材の表面清浄化工程を省略できることが分かる。Above 1. As is clear from Table 2, the comparative steel has 45
% or less, whereas in the sample steel, a bonding rate of almost 100% was obtained. That is, it can be seen that the method of the present invention makes it possible to omit the surface cleaning step of the base material and the laminated material in the clad steel sheet manufacturing process.
従って本発明方法によれば、この表面清浄化工程を省略
できた分だけクラッド鋼板の生産性が向上することとな
る。Therefore, according to the method of the present invention, the productivity of clad steel plates is improved by the omission of this surface cleaning step.
また第２図（ａｌ （ｂｌは各々上述の供試ＥＡ及び比
較ＥＧを用いたクランド鋼板における接合部近傍の金属
＆ｌｌ５ａを示す８微鏡写真である。第２図（ａｌから
明らかなように、供試鋼においては、スケールは消失し
ており、スケール部には母材および合せ材より拡散移動
してきたＳｉ、Ｍｎと還元によって生じた０との酸化物
が微細な介在物として存在している。これに対して第２
図山）から明らかなように、比較鋼においては、スケー
ル部にはＳｔ、Ｍｎの微細酸化物の他に、はぼ中央に粗
大なスケールが残存している。このことから本発明の方
法によって、従来の表面清浄化を行うことなくスケール
をほぼ完全に除去できることが理解される。In addition, FIG. 2 (al) is a microscopic photograph showing the metal &ll5a near the joint in the clamped steel plates using the above-mentioned sample EA and comparative EG, respectively. In the sample steel, the scale has disappeared, and oxides of Si and Mn, which have diffused from the base metal and composite material, and 0, which was generated by reduction, exist as fine inclusions in the scale part. .On the other hand, the second
As is clear from Fig. 2), in the comparative steel, in addition to fine oxides of St and Mn in the scale portion, coarse scale remains at the center of the warp. From this, it is understood that the method of the present invention can almost completely remove scale without performing conventional surface cleaning.
以上のように、本発明にかかるクラフト鋼板の製造法に
よれば、母材および合せ材を酸化皮膜のままで重ね合せ
て全周を接合密閉し、通常の加熱温度より高い温度で所
定時間加熱し、しかる後圧延によって接合するようにし
たので、特別な処理設備を用いることなく、つまり、合
せ面の清浄化工程を要することなく、圧延に際して不可
欠である加熱工程の条件を設定することのみによって酸
化皮膜を消失させることができ、優れた接合性をもつク
ラッド鋼板を安価に製造できる効果がある。As described above, according to the method for manufacturing a craft steel sheet according to the present invention, the base material and the laminate are overlapped with the oxide film intact, the entire circumference is bonded and sealed, and the material is heated for a predetermined period of time at a temperature higher than the normal heating temperature. However, since the bonding is then carried out by rolling, there is no need to use special processing equipment, that is, there is no need for a cleaning process for the mating surfaces, and only by setting the conditions for the heating process that is essential for rolling. This has the effect of eliminating the oxide film and producing clad steel plates with excellent bonding properties at low cost.
第１図は本発明における問題点を解決するための手段を
説明するためのコンポジット厚と加熱保持時間との関係
を示す図、第２図（ａｌ （ｂｌは各々本発明に従った
供試鋼及び比較鋼を用いたクラッド鋼板の金属＆［ｌ織
を示す顕微鏡写真である。FIG. 1 is a diagram showing the relationship between composite thickness and heating holding time to explain the means for solving the problems in the present invention, and FIG. It is a micrograph showing the metal & [l weave] of the clad steel plate using and comparative steel.
Claims (1)
量％、Ｍｎ：０．３０〜２．５重量％、Ｎｉ＋Ｃｒ：≦
１０．０重量％を含み、さらにＣｕ：≦２．０重量％、
Ｍｏ：≦１．０重量％、Ｎｂ：≦０．１重量％、Ｖ：≦
０．１重量％の１種又は２種以上を含み、残部鉄および
不可避的不純物よりなる鋼の母材及び合せ材を相互に接
合したクラッド鋼板の製造法であって、母材及び合せ材
の相互の合せ面を酸化皮膜付着のままで重ね合わせてそ
の全周縁を接合密閉し、この母材及び合せ材を接合密閉
してなるコンポジットを１１５０℃以上の温度で、下式 Ｔ＝０．０４ｔ Ｔ：保持時間（時間）但し、Ｔ≧１時間 ｔ：コンポジット（母材と合せ材を加えた もの）の厚さ（ｍｍ） で表される保持時間Ｔ以上に加熱保持したあと、圧延接
合することを特徴とするクラッド鋼板の製造法。(1) C:≦1.0% by weight, Si: 0.05-1.0% by weight, Mn: 0.30-2.5% by weight, Ni+Cr:≦
10.0% by weight, further Cu:≦2.0% by weight,
Mo:≦1.0% by weight, Nb:≦0.1% by weight, V:≦
A method for producing a clad steel plate in which a steel base material and a cladding material containing 0.1% by weight of one or more kinds, with the balance consisting of iron and unavoidable impurities, are joined to each other, the method comprising: The mating surfaces are overlapped with the oxide film attached and the entire periphery is bonded and sealed, and the composite made by bonding and sealing the base material and the bonding material is heated to a temperature of 1150°C or higher using the following formula T = 0.04t T: Holding time (hours) However, T≧1 hour t: Thickness of the composite (base material and laminate material) (mm) After heating and holding for a holding time longer than T, rolling bonding is performed. A method for producing a clad steel plate characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29422386A JPS63149091A (en) | 1986-12-10 | 1986-12-10 | Production of clad steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29422386A JPS63149091A (en) | 1986-12-10 | 1986-12-10 | Production of clad steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63149091A true JPS63149091A (en) | 1988-06-21 |
Family
ID=17804929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29422386A Pending JPS63149091A (en) | 1986-12-10 | 1986-12-10 | Production of clad steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63149091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325184A (en) * | 1991-08-20 | 1994-06-28 | Samsung Electronics Co., Ltd. | Method of and apparatus for regulating color in a received video signal |
-
1986
- 1986-12-10 JP JP29422386A patent/JPS63149091A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325184A (en) * | 1991-08-20 | 1994-06-28 | Samsung Electronics Co., Ltd. | Method of and apparatus for regulating color in a received video signal |
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