JPH03170686A - Method for descaling one-side titanium clad steel sheet - Google Patents
Method for descaling one-side titanium clad steel sheetInfo
- Publication number
- JPH03170686A JPH03170686A JP30947789A JP30947789A JPH03170686A JP H03170686 A JPH03170686 A JP H03170686A JP 30947789 A JP30947789 A JP 30947789A JP 30947789 A JP30947789 A JP 30947789A JP H03170686 A JPH03170686 A JP H03170686A
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- descaling
- pickling
- clad steel
- mixed acid
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000010936 titanium Substances 0.000 title claims description 82
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 81
- 239000002253 acid Substances 0.000 claims abstract description 57
- 238000005554 pickling Methods 0.000 claims abstract description 42
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000005253 cladding Methods 0.000 claims abstract description 5
- 230000013011 mating Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000004090 dissolution Methods 0.000 abstract description 15
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 6
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 6
- 230000002829 reductive effect Effects 0.000 abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 235000021110 pickles Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101100450563 Mus musculus Serpind1 gene Proteins 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、片面チタンクランド鋼板の脱スケール方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for descaling a single-sided titanium clamp steel plate.
母材に目的とする強度特性に合致した炭素鋼ないしステ
ンレス鋼を利用し、表面に耐食性の優れたチタンを用い
たチタンクラッド鋼板は、爆着法や圧延法などで製造さ
れている。この場合、用途に応じてチタンを両面に接合
したものと、片面のみのものが使い分けられている。Titanium clad steel sheets, which use carbon steel or stainless steel that matches the desired strength characteristics as the base material and titanium, which has excellent corrosion resistance, on the surface, are manufactured by explosion bonding methods, rolling methods, etc. In this case, depending on the purpose, one with titanium bonded on both sides and one with titanium bonded on only one side are used.
本発明は、片面チタンクランド鋼板の製造過程において
、鋼面の肌荒れを生ずることなく効率よく脱スケールす
る方法を提供することを目的とする。An object of the present invention is to provide a method for efficiently descaling without causing roughening of the steel surface in the manufacturing process of single-sided titanium crand steel sheets.
（口）従来の技術
チタンクラッド鋼板は、安価で良好な機械的、熱的、電
気的特性を有する綱と、著しく優れた耐食性を有ずるチ
タンの両者の特性を活かした材料であり、熱交換器をは
しめとする化学工業プラントや海洋建造物等の苛酷な環
境のみならず、屋根材や家電製品などの分野でも使用さ
れる複合材料である。このチタンクラット鋼板は、高温
ではチタンと鋼の界面に硬質で脆い金属間化合物層が住
成し、かつ常温では除去がきわめて困難な薄い酸化皮膜
（不動態皮膜）が存在し、鋳込み法や冷間接合法による
製造は困難であるため、爆着法（特公昭４３−４３２号
）のような特殊な接合法で製造されてきた。しかし、こ
のような特殊な製造方法では製造コストが著しく大きく
用途が限定されていた。(Explanation) Conventional technology Titanium clad steel sheet is a material that takes advantage of the characteristics of both steel, which is inexpensive and has good mechanical, thermal, and electrical properties, and titanium, which has extremely excellent corrosion resistance. It is a composite material that is used not only in harsh environments such as chemical industry plants and marine buildings, but also in fields such as roofing materials and home appliances. This titanium clad steel sheet has a hard and brittle intermetallic compound layer that forms at the interface between titanium and steel at high temperatures, and a thin oxide film (passive film) that is extremely difficult to remove at room temperature. Since it is difficult to manufacture by indirect method, special bonding methods such as explosion bonding method (Japanese Patent Publication No. 43-432) have been used for manufacturing. However, with such a special manufacturing method, the manufacturing cost is extremely high and the applications are limited.
これに対して、界面の金属間化合物成長を防止したり（
特開昭６３−６３５８５号公報）、溶融した金属間化合
物を利用して接合に真空を必要としない熱間圧延法（特
開昭６３−１４４８８１号公報、特願昭６２２７７８２
６号）が開示され、チタンクラッド鋼板のコストが急速
に低下してきた。このように熱間で接合されたチタンク
ラッド鋼板は、製造工程で生した厚い酸化皮膜を除去す
る必要があるが、全体のコストの低減の中で脱スケール
工程のコスト低減の要求が強まってきた。On the other hand, it is possible to prevent the growth of intermetallic compounds at the interface (
JP-A No. 63-63585), a hot rolling method that uses a molten intermetallic compound and does not require a vacuum for bonding (JP-A No. 63-144881, Japanese Patent Application No. 6227782)
No. 6) was disclosed, and the cost of titanium clad steel sheets has been rapidly decreasing. Titanium clad steel plates that are hot-bonded in this way need to have the thick oxide film formed during the manufacturing process removed, but as overall costs are reduced, there is an increasing demand for cost reductions in the descaling process. .
従来、チタンクラッド鋼板の脱スケールは、研磨（島崎
正英他「チタン・ジルコニウム」３４巻３号１５７頁）
ないしステンレス銅やチタンの脱スケール工程（飯高一
郎、長谷川正義著「金属チタン」日刊工業新聞社３３０
発行Ｐ１０９）を準用して行なわれ、チタンクラッド鋼
板に通した脱スケール工程の検討はなされていなかった
。すなわち、例えばＨＮ（Ｌ３とＨＦの混酸中での長時
間浸漬による酸洗や、ショット投射後Ｈ２ＳＯ４酸洗を
行ない次いで｝ＩＮＯ ３とＨＦの混酸酸洗を行なう工
程がそのまま利用されてきた。Conventionally, descaling of titanium clad steel plates is done by polishing (Masahide Shimazaki et al., "Titanium/Zirconium" Vol. 34, No. 3, p. 157)
Descaling process of copper or titanium (Ichiro Iitaka, Masayoshi Hasegawa, “Metallic Titanium”, Nikkan Kogyo Shimbunsha 330)
This was carried out by applying mutatis mutandis (Publication P109), and no consideration was given to the descaling process that passed through the titanium clad steel plate. That is, for example, a process of pickling by immersion in a mixed acid of HN (L3 and HF for a long time) or a process of performing H2SO4 pickling after shot projection and then performing a mixed acid pickling of }INO3 and HF has been used as is.
この理由は、脱スケールが著しく困難なチタンの脱スケ
ールを確実に実施することを前提としているために、ス
テンレス鋼やチタンの酸洗工程のＨＮＯ：＋と｝ＩＦ酸
洗工程を利用するためである。しかし、ｔｌＮＯ３と｝
ＩＦ酸洗はチタンの脱スケールには有効であるが、鋼の
溶解速度は著しく大きいために、チタンの脱スケールが
完了するまでには鋼の溶解が激しく進行し、鋼例の肌荒
れが進行し表面粗度が劣化する欠点があった。この欠点
は、両面クラッドの場合には問題にならないが、片面ク
ラッドの場合商品価値がかなり低下するのみならず、鋼
例の歩留りの大きな低下に加えて、鋼の必要以上の熔解
のために酸の急速な劣化を招くなど、コストの大きな上
昇要因となっていた。The reason for this is that the HNO: + and IF pickling process used in the pickling process for stainless steel and titanium is used to ensure descaling of titanium, which is extremely difficult to descale. be. However, with tlNO3}
IF pickling is effective for descaling titanium, but because the dissolution rate of steel is extremely high, by the time descaling of titanium is completed, the dissolution of the steel has progressed rapidly, and the roughness of the steel surface has progressed. There was a drawback that the surface roughness deteriorated. This drawback is not a problem in the case of double-sided cladding, but in the case of single-sided cladding, it not only significantly reduces the commercial value, but also greatly reduces the yield of steel samples. This was a major factor in increasing costs, as it led to rapid deterioration.
（ハ）発明が解決しようとする課題
本発明は、片面チタンクランド鋼板の脱スケール工程に
おいて、チタンと鋼の酸への溶解速度の大きな差異を緩
和し、それぞれの脱スケール速度をマッチさせた脱スケ
ール方法を提供するものである。(c) Problems to be Solved by the Invention The present invention aims to alleviate the large difference in the dissolution rate of titanium and steel in acid in the descaling process of single-sided titanium crand steel sheets, and to match the respective descaling rates. It provides a scaling method.
（二）課題を解決するための手段
従来実施されているステンレス鋼の酸洗脱スケール工程
は、まず安価なＨ２ＳＯ４やＨＣＩＩで大半のスケール
除去を行なった後、高価な｝ＩＮＱＩとＨＦの冫昆酸で
残留したスケールと酸洗時の溶解生成物であるスマソト
を除去することを狙いとした酸洗工程である。従って、
ＨＮＯ：１とＨＦ酸洗までにはスケールの大半は除去さ
れていることになる。この工程に片面のチタンクラッド
鋼板を適用した場合、鋼側は従来同様大半のスケールが
除去されるが、チタン側はＨ２ＳＯ．やＨＣｔ中での溶
解は非常に小さいため、かなりの量のスケールが残存し
た状態でＨＮＯ３とＩＦの混酸中に浸漬されることにな
る。このため、チタンの脱スケールが終了するまで鋼は
チタンの溶解速度よりはるかに大きい速度で溶解するこ
ととなるのである。また、従来実施されているチタン（
７）脱スケールはＨＮＯ：ＩとＨＦ酸洗が主体であるた
めに、チタンと同し条件（濃度、温度、時間）で洞を浸
漬した場合、鋼の溶解速度がチタンよりはるかに早いこ
ととなるのである。(2) Means for solving the problem The conventional pickling and descaling process for stainless steel is to first remove most of the scale with inexpensive H2SO4 or HCII, and then use expensive }INQI and HF chemicals. This pickling process aims to remove scale left by the acid and sumasoto, which is a dissolved product during pickling. Therefore,
By the time of HNO:1 and HF pickling, most of the scale has been removed. When a single-sided titanium clad steel plate is used in this process, most of the scale is removed from the steel side as before, but the titanium side is removed by H2SO. Since the dissolution in HNO3 and HCt is very small, it is immersed in the mixed acid of HNO3 and IF with a considerable amount of scale remaining. For this reason, the steel will melt at a much higher rate than the dissolution rate of titanium until the descaling of titanium is completed. In addition, the conventional titanium (
7) Since descaling mainly involves HNO:I and HF pickling, the dissolution rate of steel is much faster than that of titanium when the cavities are immersed under the same conditions as titanium (concentration, temperature, time). It will become.
以上の点から本発明者らは、チタンと鋼の酸への溶解速
度の大きな差異を緩和し、それぞれの脱スケール速度を
釣合させるにはＨＮＱ，とＨＦの混酸中での鋼の溶解速
度を低下させることが重要であると考え、本発明を威し
遂げた。従来、脱スケール方法の開発においてはいかに
溶解速度を高くするかという点が肝要であり、そのため
に多くの努力がなされてきたが、本発明は従来のこのよ
うな技術指向とはまったく逆の指向を行なったものであ
る。From the above points, the present inventors have determined that in order to alleviate the large difference in the dissolution rate of titanium and steel in acid and to balance their respective descaling rates, the dissolution rate of steel in a mixed acid of HNQ and HF is The present invention was developed based on the belief that it is important to reduce the Conventionally, in the development of descaling methods, it has been important to find a way to increase the dissolution rate, and many efforts have been made to this end. This is what was done.
ｌＮＯ３とＨＦの混酸中にチタンと鋼を同時に浸漬し鋼
の溶解速度を低下させるためには、鋼例の表面に酸との
接触を妨害する皮膜を被覆することが考えられる。しか
し、このために例えば有機皮膜などを塗布すれば工程が
繁雑になるだけでなく、目的とする脱スケールもまた停
止することとなり、適用は不可能である。本発明は、こ
のために脱スケールすべきスケールを溶解の抑制皮膜と
して利用すること、および酸溶液の噴射により片面のみ
の脱スケールを行ない、しかる後他の面の脱スケールを
行なうことを考え出した。このために、従来のステンレ
ス鋼の脱スケール工程で用いられている、まず安価な酸
による酸洗、次いで高価な酸による酸洗の順序を逆にし
、まず高価ではあるがチタンの脱スケールが容易なｌＨ
ＮＯ３とＨＦの混酸にて酸洗し、次いでチタンの脱スケ
ールはほとんど期待できないが鋼の脱スケールには有効
な酸にて酸洗する脱スケール工程とし、本発明を完戒し
た。In order to simultaneously immerse titanium and steel in a mixed acid of lNO3 and HF to reduce the dissolution rate of the steel, it is conceivable to coat the surface of the steel with a film that prevents contact with the acid. However, if an organic film or the like is applied for this purpose, it will not only complicate the process but also stop the desired descaling, making it impossible to apply. For this purpose, the present invention has devised the idea of using the scale to be descaled as a dissolution inhibiting film, and descaling only one side by spraying an acid solution, and then descaling the other side. . For this purpose, we reversed the order of first pickling with a cheap acid and then pickling with an expensive acid, which is used in the conventional descaling process for stainless steel. Although it is expensive, it is easier to descale titanium first. na lH
The present invention was completed by using a descaling process in which pickling is performed with a mixed acid of NO3 and HF, and then pickling is performed with an acid that is hardly expected to descale titanium but is effective for descaling steel.
すなわち本発明の要旨とするところは下記のとおりであ
る。That is, the gist of the present invention is as follows.
（１）母材が鋼、合せ材がチタンまたはチタン合金であ
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにショットを投射し、そ
の後両面をｌｌＮＯ．＋とＨＦの混酸溶液中に浸漬して
酸洗することを特徴とする片面チタンクラッド鋼板の脱
スケール方法。(1) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, a shot is projected only on one side of the titanium or titanium alloy side, and then both sides are llNO. A method for descaling a single-sided titanium clad steel sheet, the method comprising pickling by immersing it in a mixed acid solution of + and HF.
（２） ＨＮＯ，とＨＦの混酸で酸洗した後、引続き
両面をＨ（Ｊまたは／およびＨ２Ｓｏ，溶液を噴射また
は核酸あるいは該混酸溶液中に浸漬して酸洗する前項１
記載の片面チタンクラッド鋼板の脱スケール方法。(2) After pickling with a mixed acid of HNO and HF, continue to pickle both sides by spraying H(J or/and H2So) solution or by immersing them in a nucleic acid or mixed acid solution.
The described method for descaling single-sided titanium clad steel sheets.
（３）母材が鋼、合せ材がチタンまたはチタン合金であ
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにＨＮＯ．とＨＦの混酸
を噴射して酸洗し、引続き両面に１＋１ＪＯ．とＨＰの
混酸を噴射または該混酸の溶液中に浸漬して酸洗するこ
とを特徴とする片面チタンクラ？ド鋼板の脱スケール方
法。(3) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, HNO is applied only to one side on the titanium or titanium alloy side. and HF for pickling, followed by 1+1 JO. on both sides. A single-sided titanium alloy characterized by pickling by spraying a mixed acid of and HP or by immersing it in a solution of the mixed acid? A method for descaling steel plates.
（４）チタンまたはチタン合金側の片面のみにＨＮＯ．
とＨＦの混酸を噴射して酸洗する前に、該片面または両
面にショットを投射する前項３記載の片面チタンクラッ
ド鋼板の脱スケール方法。(4) HNO on only one side of titanium or titanium alloy side.
3. The method for descaling a single-sided titanium clad steel sheet according to item 3 above, wherein a shot is projected onto one or both surfaces before pickling by jetting a mixed acid of HF and HF.
（５）母材が鋼、合せ材がチタンまたはチタン合金であ
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにＨＮＯ．とＨＰの混酸
を噴射して酸洗し、引続き両面にＨ（Ｊまたは／および
］１■ｓｏ，を噴射するかまたは核酸あるいは該混酸溶
液中に浸漬して酸洗することを特徴とする片面チタンク
ラッド鋼板の脱スケール方法。(5) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, HNO is applied only to one side on the titanium or titanium alloy side. One side is characterized by being pickled by spraying a mixed acid of A method for descaling titanium clad steel plates.
（６）チタンまたはチタン合金側の片面のみに１１ Ｎ
０ ３とＨＦの混酸を噴射して酸洗する前に、該片面
または両面にショットを投射する前項５記載の片面チタ
ンクラッド綱板の脱スケール方法。(6) 11 N only on one side of titanium or titanium alloy side
The method for descaling a single-sided titanium clad steel sheet according to item 5 above, wherein a shot is projected onto one or both surfaces before pickling by jetting a mixed acid of 0.03 and HF.
（７） ＩＩ ｃｚまたは／およびＨＺＳＯ．にょる
酸洗後、さらに両面にＨＮＯ３あるいはＨＮＯ，とＨＦ
の混酸を噴射または該酸あるいは該混酸溶液中に浸漬し
て酸洗する前項２，５．６記載の片面チタンクランド鋼
板の脱スケール方法。(7) II cz or/and HZSO. After pickling, both sides are further coated with HNO3 or HNO, and HF.
The method for descaling a single-sided titanium crand steel sheet according to the preceding item 2, 5.6, which comprises pickling by spraying a mixed acid or by immersing it in the acid or mixed acid solution.
本発明は、熱間圧延後の片面チタンクラ・冫ド鋼板に対
して用いることが最も効果が大きいが、冷延後の焼鈍を
大気中や窒素ガス中で行なった場合にはその後の脱スケ
ール工程に適用しても有効である。The present invention is most effective when applied to single-sided titanium-clad steel sheets after hot rolling, but if annealing is performed in the air or nitrogen gas after cold rolling, the subsequent descaling process It is also effective when applied to
次に本発明の限定条件を示す。Next, the limiting conditions of the present invention are shown.
ショットの投射条件は、ショット粒のサイズやショット
投射密度により絶対的な脱スケール速度に影響が表れる
が、本発明の効果はいずれの場合も認められる上に、チ
タン面と鋼面の脱スケール性の差異によっては、絶対的
な脱スケール速度の遅いショット投射条件も選択する可
能性がある。The shot projection conditions affect the absolute descaling speed depending on the size of the shot grains and the shot projection density, but the effects of the present invention can be seen in any case, and the descaling performance of titanium and steel surfaces is Depending on the difference in , shot projection conditions with a slow absolute descaling rate may also be selected.
チタンの脱スケールは、ＨＮＯ，とＨＦの混酸が最も効
果が大きいのでこれらの混酸と限定する。For titanium descaling, a mixed acid of HNO and HF is most effective, so the mixed acid is limited to these.
鋼の脱スケールを狙った後は、従来から提唱されている
鋼の脱スケール用酸であるＩ｛αやＨ２ＳＯ．およびこ
れらの混酸が適切であるので、ＦＩＣＪまたはＨ２ＳＯ
．およびこれらの混酸に限定する。After aiming at descaling steel, I{α, H2SO. and these mixed acids are suitable, so FICJ or H2SO
．． and mixed acids thereof.
必要に応して脱スケール後に実施する酸洗スマットの除
去のための酸洗は、スマット除去に最も有効なＨＮＯ３
とＨＦの混酸と限定する。Pickling to remove smut, which is carried out after descaling if necessary, uses HNO3, which is the most effective method for removing smut.
and HF mixed acid.
（ホ）作用
請求項１および２記載の方法においては、チタン面のみ
ショット投射により脱スケールを進行させる。その後の
ＨＮＯ３とＨＦの混酸中での酸洗では、鋼側にスケール
が皮膜状に残っているためにｔＱ ｛！！．＋１の溶解
が抑制される。請求項３，４．５および６記載の方法に
おいては、チタン側の片面のみに１１Ｎ（ｈとＨＦの混
酸を噴射することで、調側の熔解を抑制する。請求項２
，５および６記載の方法では、その後にチタンの溶解が
ほとんど起きない＋１．ｓｏ．や１１０にて鋼側の脱ス
ケールを行なうことが可能である。この工程により、チ
タン側と鋼側の脱スケール性が異なっても両面の脱スケ
ールを確実に実施することが可能となる。(E) Effect In the method according to claims 1 and 2, descaling is progressed only on the titanium surface by shot projection. During the subsequent pickling in a mixed acid of HNO3 and HF, scale remained in the form of a film on the steel side, resulting in tQ {! ! ．． +1 dissolution is suppressed. In the methods described in claims 3, 4.5, and 6, melting on the control side is suppressed by injecting a mixed acid of 11N (h and HF) only on one side of the titanium side.Claim 2
In the methods described in , 5 and 6, there is almost no subsequent dissolution of titanium +1. so. It is possible to descale the steel side at step 110. This process makes it possible to reliably perform descaling on both sides even if the descaling properties of the titanium side and the steel side are different.
請求項３および５記載の方法においては、酸洗前にショ
ット投射などの機械的脱スケールを併用することはもち
ろん、請求項１および２記載の方法による片面のみのシ
ヨ・ント投射方法についても適用することが可能である
。さらに請求項２．５および６記載の方法において、鋼
例の脱スケールを狙ったＨＣｊまたは／およびＨ２ＳＯ
．の酸洗後に、酸洗スマットの除去のためにｌ｛ＮＯ３
とＩＦの混酸にて酸洗することも可能である。The methods according to claims 3 and 5 are applicable not only to the use of mechanical descaling such as shot projection before pickling, but also to the single-sided shot projection method according to the methods according to claims 1 and 2. It is possible to do so. Furthermore, in the method according to claims 2.5 and 6, HCj or/and H2SO aimed at descaling the steel example.
．． After pickling, l{NO3
It is also possible to pickle with a mixed acid of and IF.
このように、片面のチタンクラッド鋼板の酸洗脱スケー
ルにおいて、チタン側の脱スケールを促進し、かつ鋼側
に脱スケールを抑制する皮膜状のスケールを残存させ脱
スケールを抑制することが可能となった。In this way, in pickling and descaling a single-sided titanium clad steel plate, it is possible to promote descaling on the titanium side and to suppress descaling by leaving a film-like scale on the steel side that suppresses descaling. became.
また、本発明方法によりチタンクランド鋼板の品質には
、当然のことながら何等の悪影響はなかった。Furthermore, the method of the present invention naturally did not have any adverse effect on the quality of titanium crand steel sheets.
なお、ＨＮＯ，とＯＦの混酸やＨαまたは／およびＨＲ
ＳＯ．の酸の濃度、濃度比あるいは温度は、高濃度およ
び高温ほど効果が大きいが、低濃度、低温でも効果が認
められるので、網種や酸洗の浸漬、噴射等の条件による
脱スケール状況で適宜決定すればよい。In addition, a mixed acid of HNO, and OF, Hα or/and HR
S.O. Regarding the acid concentration, concentration ratio, or temperature, the higher the concentration and the higher the temperature, the greater the effect, but the effect is also recognized at low concentrations and low temperatures. All you have to do is decide.
（へ）実施例
８０μｍ厚のＪＩＳ− １種の純チタン板を合せ材とし
、Ｏ． １ １ ２％のＣを含有する炭素鋼を母材とす
る厚さ２．５ｍｍの片面チタンクラッド鋼板を熱延後、
種々の条件で脱スケールを実施した。その結果を第１表
に示した。なお、ショット投射は平均粒径２００Ｉ！ｍ
のショット粒を用いた。第１表の結果から明らかな通り
、本発明方法ではいずれも脱スケールが完了しており、
しかも鋼面の表面粗度は、ショット投射をしない場合Ｒ
ｍａｘで１０μｍ以下、ショント投射をした場合でも１
５μｍ以下と平滑であり、肌荒れなどの表面不良がない
ことが分かる。(F) Example 80 μm thick JIS-1 type pure titanium plate was used as the laminating material, and O. 1 After hot rolling a 2.5 mm thick single-sided titanium clad steel plate made of carbon steel containing 2% C,
Descaling was carried out under various conditions. The results are shown in Table 1. In addition, the shot projection has an average particle size of 200I! m
shot grains were used. As is clear from the results in Table 1, descaling is completed in all methods of the present invention,
Moreover, the surface roughness of the steel surface is R when shot projection is not performed.
10μm or less at max, 1 even when using short projection
It is found that it is smooth with a diameter of 5 μm or less, and that there are no surface defects such as rough skin.
（ト）発明の効果
本発明により、片面のチタンクラッド鋼板の酸洗脱スケ
ールにおいて、鋼側のみ溶解が急激に進行するような現
象がなくなり、酸洗後の表面品質が向上した。また、鋼
側の歩留りが著しく向上し、クラッド比の精密な設計制
御が可能となった。この結果、さらにはチタン層の薄手
化も可能となり、チタンクラッド鋼板のコスト低減が進
んだ。一方、高価なＨＮＯ，とＨＦの混酸中での必要以
上の鋼の溶解が大幅に減少したために、酸の原単位も大
幅に低下し、ひいてはチタンクラッド鋼板のコスト低減
に大きく寄与した。(G) Effects of the Invention According to the present invention, in the pickling and descaling of a single-sided titanium clad steel plate, the phenomenon in which dissolution progresses rapidly only on the steel side is eliminated, and the surface quality after pickling is improved. In addition, the yield on the steel side has significantly improved, making it possible to precisely control the cladding ratio. As a result, it has become possible to make the titanium layer thinner, leading to further cost reductions for titanium-clad steel sheets. On the other hand, because the excessive melting of steel in the expensive mixed acid of HNO and HF was significantly reduced, the acid consumption rate was also significantly reduced, which in turn greatly contributed to the cost reduction of titanium clad steel sheets.
以上示したとおり、本発明によりチタンクラッド鋼板の
製造コストが低下しただけではなく、安価なチタンクラ
ッド鋼板の提供により、チタンの優れた耐食性を低コス
トで享受することが可能となり、資源的経済的な利益は
大きいものである。As shown above, the present invention not only reduces the manufacturing cost of titanium clad steel sheets, but also provides inexpensive titanium clad steel sheets, which makes it possible to enjoy titanium's excellent corrosion resistance at low cost, resulting in resource and economic savings. The profits are huge.
Claims (7)
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにショットを投射し、そ
の後両面をＨＮＯ＿３とＨＦの混酸溶液中に浸漬して酸
洗することを特徴とする片面チタンクラッド鋼板の脱ス
ケール方法。(1) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, a shot is shot only on one side of the titanium or titanium alloy side, and then both sides are placed in a mixed acid solution of HNO_3 and HF. A method for descaling a single-sided titanium clad steel plate, which is characterized by immersing it in water and pickling it.
面をＨＣｌまたは／およびＨ＿２ＳＯ＿４溶液を噴射ま
たは該酸あるいは該混酸溶液中に浸漬して酸洗する請求
項１記載の片面チタンクラッド鋼板の脱スケール方法。(2) The single-sided titanium clad steel sheet according to claim 1, wherein after pickling with a mixed acid of HNO_3 and HF, both sides are subsequently pickled by spraying HCl or/and H_2SO_4 solution or by immersing in the acid or mixed acid solution. Descaling method.
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにＨＮＯ＿３とＨＦの混
酸を噴射して酸洗し、引続き両面にＨＮＯ＿３とＨＦの
混酸を噴射または該混酸の溶液中に浸漬して酸洗するこ
とを特徴とする片面チタンクラッド鋼板の脱スケール方
法。(3) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, only one side of the titanium or titanium alloy side is pickled by spraying a mixed acid of HNO_3 and HF, and then both sides are pickled. A method for descaling a single-sided titanium clad steel sheet, which comprises spraying a mixed acid of HNO_3 and HF or immersing it in a solution of the mixed acid for pickling.
３とＨＦの混酸を噴射して酸洗する前に、該片面または
両面にショットを投射する請求項３記載の片面チタンク
ラッド鋼板の脱スケール方法。(4) HNO_ on only one side of titanium or titanium alloy side
4. The method for descaling a single-sided titanium clad steel sheet according to claim 3, wherein a shot is projected onto one or both surfaces before pickling by spraying a mixed acid of titanium cladding and HF.
る片面クラッド鋼板の脱スケール工程において、チタン
またはチタン合金側の片面のみにＨＮＯ＿３とＨＦの混
酸を噴射して酸洗し、引続き両面にＨＣｌまたは／およ
びＨ＿２ＳＯ＿４を噴射するかまたは該酸あるいは該混
酸溶液中に浸漬して酸洗することを特徴とする片面チタ
ンクラッド鋼板の脱スケール方法。(5) In the descaling process of a single-sided clad steel plate where the base material is steel and the mating material is titanium or titanium alloy, only one side on the titanium or titanium alloy side is pickled by spraying a mixed acid of HNO_3 and HF, and then both sides are pickled. 1. A method for descaling a single-sided titanium clad steel sheet, which comprises spraying HCl or/and H_2SO_4 or immersing it in the acid or mixed acid solution for pickling.
３とＨＦの混酸を噴射して酸洗する前に、該片面または
両面にショットを投射する請求項５記載の片面チタンク
ラッド鋼板の脱スケール方法。(6) HNO_ on only one side of titanium or titanium alloy side
6. The method for descaling a single-sided titanium clad steel sheet according to claim 5, wherein a shot is projected onto one or both surfaces before pickling by jetting a mixed acid of No. 3 and HF.
後、さらに両面にＨＮＯ＿３あるいはＨＮＯ＿３とＨＦ
の混酸を噴射または該酸あるいは該混酸溶液中に浸漬し
て酸洗する請求項２，５，６記載の片面チタンクラッド
鋼板の脱スケール方法。(7) After pickling with HCl or/and H_2SO_4, add HNO_3 or HNO_3 and HF on both sides.
7. The method for descaling a single-sided titanium clad steel sheet according to claim 2, 5, or 6, wherein pickling is carried out by spraying a mixed acid or by immersing in the acid or mixed acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30947789A JPH03170686A (en) | 1989-11-29 | 1989-11-29 | Method for descaling one-side titanium clad steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30947789A JPH03170686A (en) | 1989-11-29 | 1989-11-29 | Method for descaling one-side titanium clad steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03170686A true JPH03170686A (en) | 1991-07-24 |
| JPH0583638B2 JPH0583638B2 (en) | 1993-11-26 |
Family
ID=17993455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30947789A Granted JPH03170686A (en) | 1989-11-29 | 1989-11-29 | Method for descaling one-side titanium clad steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03170686A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10043148A1 (en) * | 2000-08-31 | 2002-03-14 | Volkswagen Ag | Process for increasing the corrosion resistance of a workpiece made of titanium or titanium alloy contaminated with metallic iron comprises treating the workpiece with a pickling solution of concentrated nitric acid in concentrated ethanol |
| CN102328278A (en) * | 2011-07-01 | 2012-01-25 | 云南钛业股份有限公司 | Method for removing oxide skin by shot blasting on titanium and titanium alloy strip coils |
| JP2014009363A (en) * | 2012-06-27 | 2014-01-20 | Nippon Steel & Sumitomo Metal | Method for producing titanium plate |
-
1989
- 1989-11-29 JP JP30947789A patent/JPH03170686A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10043148A1 (en) * | 2000-08-31 | 2002-03-14 | Volkswagen Ag | Process for increasing the corrosion resistance of a workpiece made of titanium or titanium alloy contaminated with metallic iron comprises treating the workpiece with a pickling solution of concentrated nitric acid in concentrated ethanol |
| DE10043148B4 (en) * | 2000-08-31 | 2009-02-26 | Volkswagen Ag | A method for increasing the corrosion resistance of a titanium or titanium alloy workpiece and use of the method |
| CN102328278A (en) * | 2011-07-01 | 2012-01-25 | 云南钛业股份有限公司 | Method for removing oxide skin by shot blasting on titanium and titanium alloy strip coils |
| JP2014009363A (en) * | 2012-06-27 | 2014-01-20 | Nippon Steel & Sumitomo Metal | Method for producing titanium plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0583638B2 (en) | 1993-11-26 |
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