JPS613611A - Descaling method of stainless steel plate - Google Patents
Descaling method of stainless steel plateInfo
- Publication number
- JPS613611A JPS613611A JP12185084A JP12185084A JPS613611A JP S613611 A JPS613611 A JP S613611A JP 12185084 A JP12185084 A JP 12185084A JP 12185084 A JP12185084 A JP 12185084A JP S613611 A JPS613611 A JP S613611A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- stainless steel
- scale
- descaling
- projection
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 29
- 239000010935 stainless steel Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 16
- 238000005554 pickling Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 description 24
- 239000010959 steel Substances 0.000 description 24
- 239000003082 abrasive agent Substances 0.000 description 13
- 238000005507 spraying Methods 0.000 description 8
- 238000011282 treatment Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 241000430525 Aurinia saxatilis Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000007124 Brassica oleracea Species 0.000 description 1
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
- 235000012905 Brassica oleracea var viridis Nutrition 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 ore Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（〆業」二の利用分野）
本発明は、平滑な表面を得るステンレス鋼板のデスケー
リング方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Use in Finishing Industry) The present invention relates to a method for descaling a stainless steel plate to obtain a smooth surface.
（従来技術９
ステンレス鋼の熱間圧延や熱処理によって生成し７．：
酸化スケールは、一般に酸洗のみては除去することかで
きない。このため、酸洗前処理として、機械的あるいは
化学的な処理が行われる。機械的処理としては、通常シ
ョツトブラスト処理が行われ、すぐれたデスケーリング
効果が得られている。(Conventional technology 9 Produced by hot rolling or heat treatment of stainless steel 7.:
Oxidized scale generally cannot be removed only by pickling. For this reason, mechanical or chemical treatment is performed as a pre-pickling treatment. Shot blasting is usually used as a mechanical treatment, and an excellent descaling effect has been obtained.
しかし、ショツトブラストによってステンレス鋼表面（
こ凹凸が生じ、これを冷間圧延すると、冷延製品ｆこゴ
ールドタスト疵が発生し問題となる。ここで、ゴールド
ダスト疵とは、製品を加工したとき、あるいは製品に施
した塗膜や貼付膜等を剥離しｋとき、製品表面の微小部
分がめくれて生じる欠陥である。したがって、ショツト
ブラスト処理したステンレス鋼を冷間圧延する場合は、
ベルトグラインダー等により表面の凹凸を除去する必要
があった。また、機械的処理として曲げ加工を行うこと
も公知であるが、ステンレス鋼が加工硬化するので好１
しくない。化学的処理としては、アルカリ溶融塩に浸漬
するか、あるいは高温状態のステンレス鋼船こアルカリ
水溶液を噴射するいわゆるソルト処理が行われている。However, by shot blasting the stainless steel surface (
If these unevenness are produced and cold rolled, gold dust defects will occur in the cold rolled product, which poses a problem. Here, the gold dust flaw is a defect that occurs when a minute portion of the surface of a product is turned over when the product is processed or when a coating film, adhesive film, etc. applied to the product is peeled off. Therefore, when cold rolling shot blasted stainless steel,
It was necessary to remove surface irregularities using a belt grinder or the like. It is also known to perform bending as a mechanical treatment, but this is not preferred because stainless steel is work hardened.
It's not right. Chemical treatments include immersion in molten alkali salt, or so-called salt treatment, which involves spraying an alkaline aqueous solution onto a stainless steel vessel at a high temperature.
しかし、ソルト処理は、熱間圧延で生じたスクールある
いは熱間圧延後さらに熱処理を行って生じｆこスケール
のようにＦｅ酸化物を主体とするスケールの場合にはほ
とんど効果がない。However, the salt treatment has little effect on scales mainly composed of Fe oxides, such as schools produced during hot rolling or scales produced by further heat treatment after hot rolling.
普通鋼の熱間圧延ストリップのデスケーリング方法とし
て、研掃材を混入した高圧水流をストリップ面（こ吹き
つけてスクールを除去する方法が、特開昭５０−２０９
６７号公報等によって知られている。この公知の方法は
、研掃材を吹付けることをこよってスケールを研削し除
去するものであり、酸洗が不要であるが、スケールを完
全に除去するためには、地鉄も研削されることをさける
ことができない。この−１こ−めζ地側の受−ける研削
の程度が一様でなく、デスケーリング後のストリップの
表面光沢のむらの原因となる。ステンレス鋼板のように
表面品質の要求が厳しい場合には、このような従来の研
掃材投射によるデスケーリングでは、良好な表面品質の
製品を得ることが困難である。As a descaling method for hot-rolled strips of ordinary steel, a method of removing school by spraying a high-pressure water jet mixed with an abrasive onto the strip surface was proposed in Japanese Patent Laid-Open No. 50-209.
It is known from Publication No. 67 and the like. This known method grinds and removes scale by spraying an abrasive, and does not require pickling, but in order to completely remove scale, the base metal is also ground. I can't avoid it. The degree of grinding received on the ground side of the -1 thread is not uniform, which causes unevenness in the surface gloss of the strip after descaling. In cases where surface quality requirements are strict, such as with stainless steel plates, it is difficult to obtain products with good surface quality by descaling using conventional abrasive projection.
ｆ、た、ホーニング処理を行い、ホーニング液吹付け（
これも研掃材を混入した高圧水流であるっ時の機械的衝
撃力と研削力をこまってスケールをブレーキングした後
酸洗を行う方法が特開昭５１−１４４３３９号公報によ
って知られている。しかし、この公知の方法も、研掃材
によって地鉄表面を研削するので、ステンレス鋼板に適
石した場合には、デスケーリング後の表面光沢のむらの
ため良好な表面品質の製品を得ることが困難である。f. Perform honing treatment and spray honing liquid (
JP-A No. 51-144339 discloses a method in which scale is braked using a high-pressure water stream mixed with an abrasive material, which is subjected to mechanical impact and grinding force, and then pickled. . However, this known method also uses an abrasive to grind the surface of the base metal, so if it is applied to a stainless steel plate, it is difficult to obtain a product with good surface quality due to uneven surface gloss after descaling. It is.
（発明の目的〕
本発明は、ステンレス鋼板のデスケーリングに際し、平
滑てかつ、むらのない美麗な表面を得ることを目的とす
る。(Objective of the Invention) The object of the present invention is to obtain a smooth, uniform and beautiful surface when descaling a stainless steel plate.
（発明の構成・作用〕
本発明は、研掃材を混入しｆこ高王水流をステンレス鋼
板表面に投射角６００〜９００で投射し、ついで該ステ
ンレス鋼板を酸洗することを特徴とする。本発明の好葦
しり態様では、研掃材を混入した高圧水流を、多層配列
した７ラントスブレーノズルによってステンレス鋼板表
面に前記投射角で投射し、ついで酸洗することを特徴と
する。(Structure and operation of the invention) The present invention is characterized in that a stream of high aqua regia mixed with an abrasive is projected onto the surface of a stainless steel plate at a projection angle of 600 to 900, and then the stainless steel plate is pickled. A preferred embodiment of the present invention is characterized in that a high-pressure water stream mixed with an abrasive material is projected onto the surface of a stainless steel plate at the above-mentioned projection angle using a multi-layer array of 7-lant sob nozzles, and then pickling is carried out.
本発明において、鋼板とは、帯板（ストリップ）および
切板を含む。ぼた、研掃材とは、砂鉄、鉱石、エメリー
等の適宜粒度をもつ粒子をいい、粒度は５０１１ｍ〜１
５０１ｆｎ程度を主体とするものが好ましい。葦た、投
射角とは、投射方向とステンレス鋼板表面とのなす角を
いう。投射後の酸洗は、従来ステンレス鋼用として用い
られている公知の方法を用いることがてきる。たとえば
、硝酸とぶつ化水素酸の混酸（以下硝ぶつ酸という）ｌ
こ浸漬するか又はこれをスプレーする処理、方法、ある
いは、硫酸て処理したのち前記硝ぶつ酸処理する方法な
どである。In the present invention, the steel plate includes a strip and a cut plate. "Bots" and "abrasives" refer to particles of appropriate particle size such as iron sand, ore, emery, etc., and the particle size is 5011 m to 1.
Preferably, the material is mainly composed of about 501fn. The projection angle refers to the angle between the projection direction and the surface of the stainless steel plate. For pickling after blasting, a known method conventionally used for stainless steel can be used. For example, a mixed acid of nitric acid and hydrobutyric acid (hereinafter referred to as nitric acid)
The method includes immersion in or spraying with this, or a method of treating with sulfuric acid and then treating with nitric acid.
スケール付きの５ＵＳ４３０ステンレス鋼熱延板に、研
掃材として粒度１ＯｏＩＩｒｎ程度の砂鉄を混入した高
圧水を、各種投射角で投射した後のスケール研削量、メ
タル研削量および鋼板への衝撃力を第１図に示す。第１
図（ａ）に示すように、スケール研削量は、投射角θ−
４５°のとき最大であった。しかし、θ−４５°あるい
はそれに近い投射角で投射すると、デスケーリングはさ
れるが、デスケーリングされた鋼板表面にむらが発生し
た。After spraying high-pressure water mixed with iron sand with a grain size of about 1OoIIrn as an abrasive onto a hot-rolled 5US430 stainless steel plate with scales at various projection angles, the amount of scale grinding, the amount of metal grinding, and the impact force on the steel plate were measured. Shown in Figure 1. 1st
As shown in figure (a), the amount of scale grinding is determined by the projection angle θ−
It was maximum at 45°. However, when projecting at a projection angle of θ-45° or close to it, descaling was achieved, but unevenness occurred on the surface of the descaled steel plate.
このむらは、スケールが局部的に残存しているのではな
く、全面デスケーリングされた後の鋼板表面の凹凸が局
部的にわずか（こ異なっているために生じるむらである
。このようなわずかなむらが存在してもステンレス鋼板
の商品価値を損う。また、このようなむらの存在するス
テンレス鋼板を冷間圧延して冷延薄板製品を製造しても
むらは消滅せず、顕著な光沢むらとなって、薄板の商品
価値を損う。This unevenness is not caused by scale remaining locally, but by local slight differences in unevenness on the surface of the steel plate after the entire surface has been descaled. Even if unevenness exists, it will damage the commercial value of the stainless steel sheet.Furthermore, even if stainless steel sheets with such unevenness are cold-rolled to produce cold-rolled thin sheet products, the unevenness will not disappear and the remarkable luster will be lost. It becomes uneven and damages the commercial value of the thin plate.
板状体に研掃材を投射する場合、１個のノズルから投射
された研掃材の投射領域をこけ限界があるため、通常第
２図あるいは第３図に示すよう（こ、ノズル２，４を鋼
板１の全幅（こわたって多数配置し、鋼板１を長さ方向
（矢印方向）ｌこ定速で移動させつつ投射を行う。各ノ
ズルの配置は、隣接するノズルからの投射領域が、鋼板
を移動させたときに互（こ−都電なり合うようになされ
る。第２図は、研掃材を含む高圧水が円錐状（こ拡がっ
て投射される円錐スプレーノズル２の例を示し、第３図
は、該高圧水が平面状に拡がって投射されるフラットス
プレーノズル４の例を示す。いずれ（７） ／ Ｘ ル
ｆ用いた場合でも、１個のノズルからの投射領域３゜５
内の位置によってスケール研削量が均一でなく、また隣
接ノズルからの投射領域との重なりによってもスケール
研削量に差が生じ、さら１こ、スケミルが研削除去され
た後メタルが研削され、該メタルの研削量の差によって
鋼板表面（こわずかな凹凸の差が生じ、これがむらとな
って現われる。When projecting abrasive material onto a plate-shaped object, there is a limit to the projection area of the abrasive material projected from one nozzle. 4 are arranged across the entire width of the steel plate 1, and the projection is performed while moving the steel plate 1 at a constant speed in the length direction (direction of the arrow).The arrangement of each nozzle is such that the projection area from the adjacent nozzle is When the steel plates are moved, they are arranged so that they overlap each other. Figure 2 shows an example of a conical spray nozzle 2 in which high-pressure water containing abrasive material is projected in a conical shape. Fig. 3 shows an example of a flat spray nozzle 4 in which the high-pressure water is spread and projected in a planar manner.
The amount of scale grinding is not uniform depending on the position within the nozzle, and there is also a difference in the amount of scale grinding due to overlap with the projection area from the adjacent nozzle. Due to the difference in the amount of grinding, slight differences in unevenness occur on the steel plate surface, and this appears as unevenness.
メタル研削量も第１図（ｂ） ｆこ示すよう（こ投射角
θの低いところで多く、θ＝３０°近くで最大となった
。前述のよう（こ、スケールが研削除去されるとメタル
表面が現われ、スケールの場合と同様（こ各ノズルの投
射領域および隣接ノズルの投射領域との重なり（こよっ
て研削量に差が生じるため、投射処理後の鋼板表面およ
びこれを冷延した薄板表面にむらが生じたつ
研掃材の混入した高圧水を投射角θ中４５°て投射し、
スケールを研削し、スケールが未だ鋼板」−に残存して
いる状態で酸洗し、酸洗（こよって完全にデスケ−リン
クした場合（こもむらが生じた。As shown in Fig. 1(b), the amount of metal grinding was large at low projection angles θ, and reached its maximum near θ = 30°. appears, and as in the case of scale (this overlaps the projection area of each nozzle and the projection area of the adjacent nozzle (this causes a difference in the amount of grinding), Projecting uneven high-pressure water mixed with abrasive material at a projection angle of θ of 45°,
When the scale is ground and the scale still remains on the steel plate, it is pickled and the steel plate is completely descaled.
これは、前述のように投射時（こおける研削量が鋼板の
位置によって異なるだめ、これを酸洗したとき、残存ス
ケールの有無、程度によってメタルの溶解程度が異なる
ためである。なお、このような条件で投射してスケール
を研削した場合に残存したスケールは、酸洗て除去し難
いものであった。This is because, as mentioned above, the amount of grinding during projecting varies depending on the position of the steel plate, and when pickling this, the degree of metal dissolution varies depending on the presence and extent of residual scale. When the scale was ground by blasting under these conditions, the remaining scale was difficult to remove by pickling.
投射時をこおける鋼板への衝撃力は、第１図（す（こ示
すよう船こ、投射角θ−９０°のとき、すなわち鋼板Ｏ
こ対して垂直に投射したとき最大であり、この場合投射
のみではデスケ−リンクされなかったが、引き続いて行
った酸洗（こよって容易にデスケ−リンクされ、平滑て
むらのない均一な表面の鋼板が得られた。このような平
滑でむらのない均一な表面は、第１図（ａＬ （１）
）、（すに示すよう（こ、鋼板への衝撃力が高く、スケ
ール研削量およびメタル研削量の少ない条件すなわち投
射角θ−６０°〜９０°のとき（こ得られた。また、こ
のような条件で投射し、酸洗してデスケ−リンクされた
鋼板を冷延して得られた薄板製品の表面も、光沢むらの
ない均一なものてあった。The impact force on the steel plate during projection is shown in Figure 1 (as shown in Figure 1).
On the other hand, it was greatest when the projection was performed perpendicularly; in this case, the projection alone did not result in descaling, but subsequent pickling (thus easily descaling, resulting in a smooth, even and uniform surface). A steel plate was obtained. Such a smooth, even and uniform surface is shown in Figure 1 (aL (1)
), (As shown in (this), when the impact force on the steel plate is high and the amount of scale grinding and metal grinding is small, that is, the projection angle θ is -60° to 90° (this was obtained. The surface of the thin sheet product obtained by cold rolling the steel sheet that had been blasted under the same conditions, pickled, and descale-linked was also uniform with no uneven gloss.
ステンレス鋼の熱間圧延や熱処理によって生成した表面
酸化スケールは、Ｃｒ酸化物主体のち密なスケールを含
んでいるため、酸に溶解し難く、まだ、酸洗時に酸がス
ケール層を透過し難いので、酸洗のみてデスケ−リンク
することは困難である。The surface oxide scale generated by hot rolling or heat treatment of stainless steel contains a dense scale mainly composed of Cr oxides, so it is difficult to dissolve in acid, and it is still difficult for acid to penetrate the scale layer during pickling. However, it is difficult to descale only by pickling.
本発明法のように、研掃材を混入した高圧水流を投射角
６０°〜９０°て投射した後酸洗を行うと、投射による
衝撃力【こよってスケール層に割れ等多数の欠陥が生じ
、酸洗時に、酸がこの欠陥を通ってメタル表面【こ達し
、メタル表面層が溶解してスケールが剥離する。メタル
表面【こは、Ｃｒ酸化物主体のスクール生成に伴うＣｒ
欠乏層が存在しているので、この肖欠乏層が酸で溶解し
てスケールが剥離する。When pickling is performed after projecting a high-pressure water stream mixed with an abrasive at a projection angle of 60° to 90°, as in the method of the present invention, the impact force caused by the projection [thus causes many defects such as cracks in the scale layer]. During pickling, acid passes through these defects and reaches the metal surface, dissolving the metal surface layer and peeling off the scale. Metal surface [This is Cr due to the formation of schools mainly composed of Cr oxide.
Since a deficient layer exists, this deficient layer is dissolved by acid and the scale is peeled off.
研掃拐を混入した高圧水流の投射角θが６０゜より小さ
いと、第１図（、Ｃ）に示すように、鋼板への衝撃力が
低Ｆするため、引き続き行う酸洗時ｔこ、ｔｔｐがスケ
ール層を透過し難くなってデスケ−リンク？４１−が劣
化する。ここて、θが６０°より／」・さいと、第１図
（３月こ示ずよう（こスケール研削量は増力１しｌ−る
が、残イｆしたスケール（こ充分な衝撃力が加見られて
いないためデスケーリング性が悪く、捷だ、残存スケー
ルがないよう（こ充分に研削したとしてもむらが生しる
。If the projection angle θ of the high-pressure water stream containing abrasive particles is smaller than 60°, the impact force on the steel plate will be low, as shown in Fig. 1 (, C), so that during subsequent pickling, Is it difficult for ttp to pass through the scale layer and cause a death link? 41- deteriorates. At this point, θ is greater than 60°, as shown in Figure 1 (see Figure 1). Since it is not ground, the descaling properties are poor, and there is no residual scale (even if it is sufficiently ground, there will be unevenness).
本発明において、研掃材を混入した高圧水流をステンレ
ス鋼に投射するには、第４図に示す円錐スプレーノズル
、第５図【こ示すフラットスプレーノズル等公知のノズ
ルを用いることがてきる。第４図は円錐スプレーノズル
（こよる投射例を示すものである。図示ノズルは、焦点
型ノズルともいわれるもので、研掃材出口６から放出さ
れた研掃材が、該出Ｉコロの周囲【こ６個設けられた高
圧水ノズル先端７からの高圧水ビームの焦点丁て加速さ
れ、その後円錐状〔こ拡がって鋼板上に投射される。第
５図は、フラットスプレーノズル（こよる投射例を示す
ものである。研掃材出口９から放出された研掃材は、高
圧水ノズル先端８からのフラットスプレー水流によって
加速され、扇形【こ拡がって鋼板上に投射される。これ
ら公知のノズルのうち、本発明においてはフラットスプ
レーノズルを用い、第３図に示すようにこれを多層配列
するのが最良である。多層配列するとは、第３図に示す
よう（こ、各ノズル４から投射された扇形のスプレーパ
ターンが平行で、かつ、鋼板を移動させたとき鋼板上の
投射領域５が、隣接間て互に一都電なり合うよう（こ配
列することをいう・
このように、多層配列したフラットスプレーノズルによ
って、ステンレス鋼表面（こ投射角６０゜〜９０°で投
射すると、子ケール１こ全面ｔこ均一な衝撃力を十分に
与えるととができ、その結果酸洗により均一【こデスケ
−リンクされ、むらのない均一な鋼板が得られる。In the present invention, in order to project the high-pressure water stream mixed with the abrasive material onto the stainless steel, known nozzles such as the conical spray nozzle shown in FIG. 4 and the flat spray nozzle shown in FIG. 5 can be used. FIG. 4 shows an example of projection using a conical spray nozzle. The illustrated nozzle is also called a focal nozzle, and the abrasive material discharged from the abrasive material outlet 6 is sprayed around the exit roller. [The high-pressure water beams from the six high-pressure water nozzle tips 7 are focused and accelerated, and then spread out into a conical shape and projected onto the steel plate. For example, the abrasive material discharged from the abrasive material outlet 9 is accelerated by a flat spray water stream from the high-pressure water nozzle tip 8, spreads out in a fan shape, and is projected onto the steel plate. Among the nozzles, it is best to use flat spray nozzles in the present invention and arrange them in multiple layers as shown in Figure 3. The projected fan-shaped spray pattern is parallel, and when the steel plate is moved, the projected areas 5 on the steel plate are arranged in such a way that they overlap each other (this is called arranging). By using the arranged flat spray nozzles, it is possible to apply a sufficiently uniform impact force to the entire surface of the child kale (by spraying at a projection angle of 60° to 90°) on the stainless steel surface. This scale link results in a uniform steel plate with no unevenness.
（実施例〕
板厚３誦、板幅１ｍの５ＵＳ４３０およびＳＵＳ：３０
４ステンレス鋼熱延帯板をそれぞれ８ｍ／／ｌ＋と１６
”＄て通板させつつ、表１の条件で投射した後、硝ぶ
つ酸をスプレーしてデスケーリングした。(Example) 5US430 and SUS:30 with a plate thickness of 3 and a plate width of 1m
4 stainless steel hot rolled strips 8m//l+ and 16m respectively
After projecting under the conditions shown in Table 1 while passing the plate through the plate, descaling was performed by spraying nitric acid.
結果は、同表に示すように本発明例はいずれも均一（こ
デスケ−リンクされ、デスケーリング後の表面あらさが
小さくかつむらの発生がなかった。ま／ｃ１デスケーリ
ンクした後冷延を行っても光沢むらの発生がなく、特に
フラットスプレーノズルを多層配列した１６１ 、−
／Ｆｆｉ １０ではきわめて良好な薄板製品が得られた
。熱延板をデスケ−リンクした状態での表゛面あらさ曲
線を扁１（本発明例つおよび＆９（従来例）【こついて
第６図に示す。従来例はショツトブラストによる凹部が
生じるため最大高さくＲｍ＞が２５μ と粗い表面（こ
なっているが、本発明例ではこのような凹部が微小て平
滑な表面が得られている。As shown in the same table, all the examples of the present invention were uniform (descaled), and the surface roughness after descaling was small and no unevenness occurred. There is no uneven gloss even when spraying, especially when flat spray nozzles are arranged in multiple layers.
/Ffi 10, a very good thin plate product was obtained. The surface roughness curves of the hot-rolled sheets in a desca-linked state are shown in Figure 6 for examples of the present invention and &9 (conventional example). Although the surface has a rough surface (height Rm>25μ), in the example of the present invention, such recesses are minute and a smooth surface is obtained.
（発明の効果〕
本発明法によれば、ステンレス鋼板が均一（こデスケ−
リンクされ、平滑てむらのない均一な表面が得られる。(Effects of the Invention) According to the method of the present invention, the stainless steel plate is uniform (desk scaled).
A smooth, even, and uniform surface is obtained.
デスケ−リンクされたステンレス鋼板ヲ冷間圧延する場
合、ベルトクラインター符によって表面の凹凸を除去す
ることなく、光沢むらのない均一な光沢の美麗な％延製
品が得られ、ゴールドダスト疵は発生しない。When desca-linked stainless steel sheets are cold-rolled, a beautiful rolled product with a uniform gloss and no uneven gloss can be obtained without removing surface irregularities using a belt clinter, and no gold dust defects will occur. do not.
／／−＝’−’−//-='-'-
第１図は投射角度の影響を示す図で縦軸はそれぞれの最
高値ｒ、１．０とする比で示したもの、第２図および第
３図は鋼板の全幅方向を投射する例を示したもの、第４
図は円錐スプレーノズルの例、第５図はフラットスプレ
ーノズルの例、第６図はデスケ−リンク後の表面あらさ
曲線を示したものである。
１・・・鋼板、２・・円錐スプレーノズル、３，５・・
・投射領域、４・・・フラントスプレーノズル、６，９
・・・研掃材出口、７，８・・・高圧水ノズル先端。Figure 1 is a diagram showing the influence of the projection angle, and the vertical axis shows the maximum value r of each, expressed as a ratio of 1.0. Figures 2 and 3 show examples of projection in the full width direction of the steel plate. 4th thing
The figure shows an example of a conical spray nozzle, FIG. 5 shows an example of a flat spray nozzle, and FIG. 6 shows a surface roughness curve after descaling. 1... Steel plate, 2... Conical spray nozzle, 3, 5...
・Projection area, 4... Frant spray nozzle, 6, 9
...Abrasive material outlet, 7, 8...High pressure water nozzle tip.
Claims (2)
に投射角６０°〜９０°で投射し、ついで該ステンレス
鋼板を酸洗することを特徴とするステンレス鋼板のデス
ケーリング方法。(1) A method for descaling a stainless steel plate, which comprises projecting a high-pressure water stream mixed with an abrasive onto the surface of a stainless steel plate at a projection angle of 60° to 90°, and then pickling the stainless steel plate.
ットスプレーノズルによってステンレス鋼板表面に投射
することを特徴とする特許請求の範囲第１項記載のステ
ンレス鋼板のデスケーリング方法。(2) A method for descaling a stainless steel plate according to claim 1, characterized in that a high-pressure water stream mixed with an abrasive is projected onto the surface of the stainless steel plate using a multi-layered flat spray nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12185084A JPS613611A (en) | 1984-06-15 | 1984-06-15 | Descaling method of stainless steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12185084A JPS613611A (en) | 1984-06-15 | 1984-06-15 | Descaling method of stainless steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS613611A true JPS613611A (en) | 1986-01-09 |
Family
ID=14821473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12185084A Pending JPS613611A (en) | 1984-06-15 | 1984-06-15 | Descaling method of stainless steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS613611A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62254938A (en) * | 1986-04-26 | 1987-11-06 | Saitou Doramukan Kogyo Kk | Manufacture of steel vessel |
| JPH04104864A (en) * | 1990-08-24 | 1992-04-07 | Sharp Corp | Method for removing thin film |
| JPH05228838A (en) * | 1992-02-24 | 1993-09-07 | Nippon Steel Corp | Processing method for strip metal |
| KR101224016B1 (en) * | 2010-10-08 | 2013-01-21 | 주식회사 포스코 | Nozzle unit and descaler using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52120924A (en) * | 1976-04-06 | 1977-10-11 | Ishikawajima Harima Heavy Ind | Method of and device for treating surface of hot rolled steel band |
| JPS5920480A (en) * | 1982-07-23 | 1984-02-02 | Mitsubishi Heavy Ind Ltd | Descaling method of steel strip |
| JPS5947011A (en) * | 1982-09-09 | 1984-03-16 | Kawasaki Steel Corp | Descaling method of steel strip |
| JPS5944610B2 (en) * | 1975-07-07 | 1984-10-31 | ミノルタ株式会社 | Automatic diaphragm interlocking mechanism in bellows device with rotating mechanism |
-
1984
- 1984-06-15 JP JP12185084A patent/JPS613611A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944610B2 (en) * | 1975-07-07 | 1984-10-31 | ミノルタ株式会社 | Automatic diaphragm interlocking mechanism in bellows device with rotating mechanism |
| JPS52120924A (en) * | 1976-04-06 | 1977-10-11 | Ishikawajima Harima Heavy Ind | Method of and device for treating surface of hot rolled steel band |
| JPS5920480A (en) * | 1982-07-23 | 1984-02-02 | Mitsubishi Heavy Ind Ltd | Descaling method of steel strip |
| JPS5947011A (en) * | 1982-09-09 | 1984-03-16 | Kawasaki Steel Corp | Descaling method of steel strip |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62254938A (en) * | 1986-04-26 | 1987-11-06 | Saitou Doramukan Kogyo Kk | Manufacture of steel vessel |
| JPH04104864A (en) * | 1990-08-24 | 1992-04-07 | Sharp Corp | Method for removing thin film |
| JPH05228838A (en) * | 1992-02-24 | 1993-09-07 | Nippon Steel Corp | Processing method for strip metal |
| KR101224016B1 (en) * | 2010-10-08 | 2013-01-21 | 주식회사 포스코 | Nozzle unit and descaler using the same |
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