JPS636613B2 - - Google Patents
Info
- Publication number
- JPS636613B2 JPS636613B2 JP15297681A JP15297681A JPS636613B2 JP S636613 B2 JPS636613 B2 JP S636613B2 JP 15297681 A JP15297681 A JP 15297681A JP 15297681 A JP15297681 A JP 15297681A JP S636613 B2 JPS636613 B2 JP S636613B2
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- acid
- steel plate
- steel sheets
- aqueous solution
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000000137 annealing Methods 0.000 claims description 8
- 239000010960 cold rolled steel Substances 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 238000007385 chemical modification Methods 0.000 claims 1
- 229950006191 gluconic acid Drugs 0.000 claims 1
- 239000011259 mixed solution Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 238000010791 quenching Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 150000002736 metal compounds Chemical class 0.000 description 5
- 238000005554 pickling Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 3
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052827 phosphophyllite Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
Description
本発明は、外観及び化処処理性の優れた冷延鋼
板の製造方法に関する。
一般に、冷延鋼板は、ユーザーにおいて塗装し
て使用される場合が多く、その際そのほとんど
は、「塗装前処理」としてリン酸塩化成処理が施
されている。この場合、その処理液中での鋼板表
面の電気化学的な活性部分と不活性部分の存在バ
ランスが、その反応性に対して重要な因子とな
る。例えばリン酸亜鉛処理液中に鋼板を浸漬した
場合、その鋼板表面の化学反応における酸化還元
電位は、その対象により異なるが、一般的には第
１図の如く、鋼板表面の活性部分はリン酸塩処理
液中でAnodic（卑）となり、逆に不活性な部分は
Cathodic（貴）となることが知られている。
そこで、Anodicな所では、ピツクリング反応
により素地鉄が溶出（Fe→Fe++＋2e）し、
Cathdicな所ではAnode反応による局部電流に支
配されてH+が還元されて水素ガスとして消失
（2H+＋2e→H2）することから最終的にホープマ
イト（Zn3（PO4）2・4H2O）とホスホフイライト
（Zn2Fe（PO4）2・4H2O）とから成るリン酸亜鉛皮
膜が鋼板上に形成されるのである。
塗装板の塗料密着性や耐食性あるいは塗装後の
色調などの諸特性は、この化成処理皮膜の性状な
いし形成如何によつて大きく影響され、このこと
は化成処理の前段階における前処理の結果が大き
な要素となつてくる。
鋼板を化成処理するに際しての前処理のうちの
表面処理技術、特に連続焼鈍を利用した技術とし
ては、従来特開昭55−76017号及び特開昭55−
21533号公報に見られる如く、一般には連続焼鈍
プロセスの加熱帯の入口側、いわゆる洗浄セクシ
ヨンにおいて処理を施し、700℃前後で加熱処理
するのがほとんどである。
しかしながら、このような方式の場合、冷圧洗
浄後であつても、圧延油等の異物が完全にとり除
かれない場合が多く、その結果次の工程での金属
あるいは金属化合物を付着させる場面における付
着効率は極めて悪く、かつばらつきが大であると
いう欠点を有する。一般的には、この不都合を回
避する手段として当然の行為ではあるが洗浄能力
を高めたり、ブラツシング等の機械的研磨などの
手段をとることがあるが、この手段によつて付着
効率を上昇させ得たとしても、この時の鋼板表面
は一時的に極めて活性の高い状態となつているた
め熱処理中あるいはその前後の場面で酸化反応が
進行し鋼板表面は茶色あるいは青色に着色してし
まう。更には、次の工程である焼鈍炉において
700℃前後の温度に加熱するとき、塗布した金属
あるいは金属化合物は、パウダリングやハースロ
ールでのピツクアツプ等のトラブルを生じ易いと
いう欠点を有し実用化が難かしいのが実情であ
る。
本発明者らは、前述の従来方式とは観点を変え
て冷延鋼板を水焼き入れ方式により連続焼鈍する
際に、水焼き入れ−酸洗直後の鋼板表面が極めて
活性を有するものであることを巧みに利用して、
(1) Fe，NiまたはCoの水溶性化合物の水溶液の
少なくとも１種、と
(2) クエン酸、グルコン酸、酢酸、ホウ酸または
酒石酸等のナトリウム塩又はカリウム塩の水溶
液の少なくとも１種
との混合物に鋼板を浸漬させ、鋼板表面に前記(1)
に由来する改質成分を付着させ、同時に(2)の酸化
防止剤の機能により鋼板表面の酸化着色を防止し
つつ過時効処理を行うことによつて該鋼板表面に
均一な金属層あるいは金属酸化物層を形成させ、
外観及び化成処理性の優れた冷延鋼板を製造する
方法に至つたのである。
本発明においてFe，NiまたはCoの水溶性化合
物を使用する理由は、最も付着性が良好でかつリ
ン酸塩処理性の優れた結果を与えるためである。
本発明では、前記金属ないし金属化合物の皮膜
を鋼板に対して緻密でかつ均一に分布付着させる
ことを目的とするが、そのためには酸洗後のきわ
めて清浄でかつ活性の高い時点で吸着あるいは置
換めつきを行わせることが必要である。この処理
を行うときの条件としては鋼板によつて必ずしも
一律にはできないが、薬液濃度５〜100ｇ／、
処理温度常温〜90℃、好ましくは10〜50ｇ／、
50〜90℃の条件下、約３秒間浸漬することにより
概ね所期の効果が得られ易い。
本発明では、上記の金属化合物とは別に処理液
中にクエン酸、グルコン酸、酢酸、ホウ酸または
酒石酸等のナトリウム塩又はカリウム塩の水溶液
の少なくとも一種の共存を必要とする。これらの
使用目的は、常温〜300℃での酸化防止作用にあ
り、後段の工程である過時効熱処理時には溶融・
揮発して消失するか残存したとしても経時的に鋼
板に悪影響を与えない程度の痕跡量となるような
ものであることが必要である。この目的のために
使用する前記ナトリウム塩又はカリウム塩水溶液
の量は、５〜50ｇ／の中から適宜選択する。
以上の如き構成からなる本発明を実施すること
により、通常の冷延鋼板と同等か、それ以上の良
好な外観を有し、しかもリン酸塩処理性の優れた
冷延鋼板を効率的に製造することができるのであ
る。
以下実施例によつて本発明を説明する。
実施例
第２図の如き水焼き入れ方式による連続焼鈍設
備を用いて、鋼板を水焼き入れ−酸洗い−前処理
−過時効処理−冷却の工程を経て巻きとり、以降
は従前の通りの方法によりリン酸亜鉛処理を行つ
てその性能を判定した。
尚、連続焼鈍設備の具体的データは次の通りで
ある。１…ペイオフリール、２…クリーニング装
置、３…入口側ルーパー、４及び５…加熱帯及び
均熱帯（いずれも700〜850℃に設定し、通算で60
〜120秒間となるようにセツト）、６…ガスジエツ
ト式一次冷却帯（400〜850℃に冷却）、７…水焼
き入れ装置、８…前処理装置（酸洗：50℃HCl、
５秒→湯洗：50℃、５秒→処理：常温〜90℃、５
秒→湯洗：50℃10秒）、９…過時効処理帯（200〜
500℃、90〜150秒）、１０…最終冷却帯（100℃）、
１１…出口側ルーパー、１２…テンパーロール、
１３…巻きとりリール。
リン酸亜鉛処理は、スプレー方法とデイツプ方
法の両方法を試みそれぞれの処理性を判定し、最
終的にはカチオン型電着塗装を行つたのち温水噴
霧を行い塗装後の耐食性についても調査した。
表によつて明らかなように、本発明方法に従つ
て得た冷延鋼板は、従来材ないし他焼鈍プロセス
によつて得た鋼板に比較して、外観、化成処理性
が著しく向上していることが認められる。
The present invention relates to a method for manufacturing a cold rolled steel sheet with excellent appearance and chemical treatment properties. In general, cold-rolled steel sheets are often used after being painted by users, and in most cases, phosphate chemical conversion treatment is applied as a "pre-painting treatment." In this case, the balance of the electrochemically active portions and inactive portions on the surface of the steel sheet in the treatment solution is an important factor for its reactivity. For example, when a steel plate is immersed in a zinc phosphate treatment solution, the oxidation-reduction potential of the chemical reaction on the surface of the steel plate differs depending on the target, but in general, as shown in Figure 1, the active part on the surface of the steel plate is In the salt treatment solution, it becomes Anodic (base), and conversely, the inactive part
Known to be cathodic. Therefore, in an anodic place, the base iron is eluted by the pickling reaction (Fe → Fe ++ +2e),
In cathdic regions, H + is reduced under the influence of the local current caused by the Anode reaction and disappears as hydrogen gas (2H + +2e→H 2 ), resulting in the formation of hopemite (Zn 3 (PO 4 ) 2.4H 2 O) . ) and phosphophyllite (Zn 2 Fe(PO 4 ) 2.4H 2 O) is formed on the steel sheet. Various properties of painted boards, such as paint adhesion, corrosion resistance, and color tone after painting, are greatly influenced by the properties and formation of this chemical conversion film, and this means that the results of pretreatment at the stage before chemical conversion treatment have a large effect. It becomes an element. Surface treatment techniques as part of the pretreatment for chemical conversion treatment of steel sheets, especially techniques using continuous annealing, are conventionally disclosed in Japanese Patent Application Laid-Open Nos. 55-76017 and 1983-
As seen in Japanese Patent No. 21533, the treatment is generally carried out at the inlet side of the heating zone of the continuous annealing process, the so-called cleaning section, and the heat treatment is almost always carried out at around 700°C. However, in the case of this type of method, even after cold-pressure cleaning, foreign substances such as rolling oil are often not completely removed, and as a result, adhesion occurs when metals or metal compounds are attached in the next process. It has the drawbacks of extremely low efficiency and large variations. Generally speaking, as a means to avoid this inconvenience, it is natural to take measures such as increasing the cleaning ability or mechanical polishing such as brushing, but these measures can increase the adhesion efficiency. Even if it is obtained, the surface of the steel sheet at this time is temporarily in an extremely active state, and oxidation reactions proceed during or before or after the heat treatment, resulting in the surface of the steel sheet being colored brown or blue. Furthermore, in the next process, an annealing furnace,
The reality is that when heated to a temperature of around 700°C, the coated metal or metal compound tends to cause problems such as powdering and pick-up with a hearth roll, making it difficult to put it into practical use. The present inventors changed the perspective from the conventional method described above, and found that when a cold rolled steel plate is continuously annealed by a water quenching method, the surface of the steel plate immediately after water quenching and pickling is extremely active. By skillfully utilizing the A steel plate is immersed in a mixture with at least one aqueous solution, and the above (1) is applied to the surface of the steel plate.
At the same time, a uniform metal layer or metal oxidation is created on the surface of the steel sheet by attaching a modifying component derived from form a layer of matter,
This led to a method for producing cold-rolled steel sheets with excellent appearance and chemical conversion treatment properties. The reason why a water-soluble compound of Fe, Ni or Co is used in the present invention is that it provides the best adhesion and provides excellent phosphate treatment properties. The purpose of the present invention is to deposit the metal or metal compound film on the steel plate in a dense and uniform distribution, but for this purpose, it is necessary to adsorb or replace the metal or metal compound at a very clean and highly active point after pickling. It is necessary to perform plating. The conditions for performing this treatment cannot necessarily be uniform depending on the steel plate, but the chemical concentration is 5 to 100 g/,
Processing temperature: normal temperature to 90℃, preferably 10 to 50g/,
By dipping for about 3 seconds under conditions of 50 to 90°C, the desired effect can be easily obtained. The present invention requires the coexistence of at least one aqueous solution of sodium or potassium salts such as citric acid, gluconic acid, acetic acid, boric acid, or tartaric acid in the treatment solution, in addition to the above-mentioned metal compounds. The purpose of these uses is to prevent oxidation at room temperature to 300℃, and to prevent melting and
It needs to be such that it evaporates and disappears, or even if it remains, the amount is such that it does not adversely affect the steel plate over time. The amount of the sodium salt or potassium salt aqueous solution used for this purpose is appropriately selected from 5 to 50 g/g. By implementing the present invention having the above-described configuration, cold rolled steel sheets can be efficiently manufactured which have an appearance as good as or better than ordinary cold rolled steel sheets and which have excellent phosphating properties. It is possible to do so. The present invention will be explained below with reference to Examples. Example Using continuous annealing equipment using the water quenching method as shown in Fig. 2, a steel plate is wound through the steps of water quenching, pickling, pretreatment, overaging treatment, and cooling, and thereafter the conventional method is used. The performance was evaluated by performing zinc phosphate treatment. The specific data of the continuous annealing equipment is as follows. 1...Payoff reel, 2...Cleaning device, 3...Entrance side looper, 4 and 5...Heating zone and soaking zone (all set at 700-850℃, total 60℃)
~120 seconds), 6... Gas jet type primary cooling zone (cooling to 400-850℃), 7... Water quenching device, 8... Pretreatment device (pickling: 50℃ HCl,
5 seconds → hot water washing: 50℃, 5 seconds → processing: room temperature to 90℃, 5
Second → Hot water washing: 50℃ 10 seconds), 9...Overaging treatment zone (200℃~
500℃, 90-150 seconds), 10...Final cooling zone (100℃),
11... Outlet side looper, 12... Temper roll,
13...Take-up reel. For zinc phosphate treatment, both the spray method and the dip method were tried, and the treatment performance of each method was evaluated.Finally, cationic electrodeposition coating was performed, followed by warm water spraying, and the corrosion resistance after coating was also investigated. As is clear from the table, the cold-rolled steel sheets obtained according to the method of the present invention have significantly improved appearance and chemical conversion treatability compared to conventional materials or steel sheets obtained by other annealing processes. It is recognized that
【表】
つた。その後、クロスカツト部
をテープ剥離し、その剥離巾を測定した。
[Table] Ivy. Thereafter, the tape was peeled off from the cross-cut portion, and the width of the peeling was measured.
第１図は、鋼板表面の電気化学的バランスをモ
デル的に示した説明図であり、第２図は、水焼き
入れ方式による連続焼鈍設備のブロツク図であ
る。
２……クリーニング装置、４……加熱帯、５…
…均熱帯、６……冷却帯、７……水焼き入れ装置
（酸洗浄装置を含む）、８……前処理装置、９……
過時効処理帯、１０……最終冷却帯。
FIG. 1 is an explanatory diagram showing a model of the electrochemical balance on the surface of a steel plate, and FIG. 2 is a block diagram of continuous annealing equipment using a water quenching method. 2...Cleaning device, 4...Heating zone, 5...
...Soaking zone, 6... Cooling zone, 7... Water quenching device (including acid cleaning device), 8... Pretreatment device, 9...
Overaging treatment zone, 10... Final cooling zone.
Claims (1)
の水溶性化合物の水溶液の少なくとも１種と、(2)
クエン酸、グリコン酸、酢酸、ホウ酸又は酒石酸
のナトリウム塩又はカリウム塩の水溶液の少なく
とも１種との混合溶液中に鋼板を浸漬させたの
ち、過時効処理を行うことを特徴とする外観及び
化成処理性の優れた冷延鋼板の製造方法。1 In continuous annealing of steel sheets, (1) Fe, Ni or Co
at least one aqueous solution of a water-soluble compound; (2)
Appearance and chemical modification characterized by immersing a steel plate in a mixed solution of at least one aqueous solution of sodium salt or potassium salt of citric acid, glyconic acid, acetic acid, boric acid or tartaric acid, and then subjecting it to over-aging treatment. A method for producing cold-rolled steel sheets with excellent processability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15297681A JPS5855535A (en) | 1981-09-29 | 1981-09-29 | Preparation of cold-rolled steel sheet excellent in external appearance and chemical convertibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15297681A JPS5855535A (en) | 1981-09-29 | 1981-09-29 | Preparation of cold-rolled steel sheet excellent in external appearance and chemical convertibility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5855535A JPS5855535A (en) | 1983-04-01 |
| JPS636613B2 true JPS636613B2 (en) | 1988-02-10 |
Family
ID=15552239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15297681A Granted JPS5855535A (en) | 1981-09-29 | 1981-09-29 | Preparation of cold-rolled steel sheet excellent in external appearance and chemical convertibility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5855535A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11622925B2 (en) | 2019-09-30 | 2023-04-11 | The Procter & Gamble Company | Dentifrice compositions for treatment of dental biofilm |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2655606B2 (en) * | 1988-05-20 | 1997-09-24 | 日本電気株式会社 | Power supply control device monitoring control method |
| JP2013237912A (en) * | 2012-05-16 | 2013-11-28 | Nippon Steel & Sumitomo Metal Corp | High-tension cold-rolled steel strip excellent in chemical convertibility, and manufacturing method of the same |
-
1981
- 1981-09-29 JP JP15297681A patent/JPS5855535A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11622925B2 (en) | 2019-09-30 | 2023-04-11 | The Procter & Gamble Company | Dentifrice compositions for treatment of dental biofilm |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5855535A (en) | 1983-04-01 |
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