JPH02138489A - Production of adhesive hot rolled steel sheet - Google Patents
Production of adhesive hot rolled steel sheetInfo
- Publication number
- JPH02138489A JPH02138489A JP29180288A JP29180288A JPH02138489A JP H02138489 A JPH02138489 A JP H02138489A JP 29180288 A JP29180288 A JP 29180288A JP 29180288 A JP29180288 A JP 29180288A JP H02138489 A JPH02138489 A JP H02138489A
- Authority
- JP
- Japan
- Prior art keywords
- hydrochloric acid
- hot
- adhesive
- rolled steel
- steel sheet
- 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 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 67
- 239000000853 adhesive Substances 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 40
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000005554 pickling Methods 0.000 claims abstract description 26
- 238000005098 hot rolling Methods 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000007654 immersion Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 16
- 230000007423 decrease Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007718 adhesive strength test Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、接着性熱延鋼板の製造方法に関し、詳細には
、建築、家電、輸送等の分野で用いられ、優れた接着性
を必要とする熱延鋼板の製造方法に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for producing adhesive hot rolled steel sheets, and in particular is used in the fields of architecture, home appliances, transportation, etc., and requires excellent adhesive properties. The present invention relates to a method for manufacturing hot rolled steel sheets.
（従来の技術）
鋼板と鋼板或いは他材料との接合方法として、溶接或い
はリベット工法が多用されているが、製品の外観を強く
求めるもの、及び、高温或いは機械加工を嫌うものにつ
いては、樹脂（接着剤）により接着する方法（以條、接
着法という）が用いられている。(Prior art) Welding or riveting methods are often used to join steel plates or other materials, but for products that require a strong appearance or dislike high temperatures or machining, resin ( A method of adhering with adhesive (hereinafter referred to as the adhesion method) is used.
上記接着法を適用した場合の接着部の強度に関し、当初
はあまり高い強度が要求されなかったが、近年は接着剤
の強度の向上および接着技術の進歩によって、より高い
強度が実現できるようになってきた。Regarding the strength of the bonded part when applying the above bonding method, initially, very high strength was not required, but in recent years, improvements in the strength of adhesives and advances in bonding technology have made it possible to achieve even higher strength. It's here.
従来、このような接着法を適用する場合において、熱延
鋼板としては、−静的には通常の熱延鋼板の製造方法に
よって製造される熱延鋼板が使用される９この通常の製
造方法とは、鋼を熱間圧延し、コイル状に巻き取った後
、酸洗処理するというものである。このとき、酸洗処理
は、熱間圧延で生成したスケールを除去するために行わ
れるものである。Conventionally, when applying such an adhesion method, the hot-rolled steel sheet used is a hot-rolled steel sheet that is statically manufactured by a normal method for manufacturing hot-rolled steel sheets9. In this method, steel is hot-rolled, wound into a coil, and then pickled. At this time, the pickling treatment is performed to remove scale generated during hot rolling.
（発明が解決しようとする課Ｂ）
ところで、前記接着法において、得られる接着部の強度
（以降、接着強度という）は、接着剤自体の強度、及び
、接着剤と鋼板等の被着物との界面の強度（以降、界面
強度という）により支配される。従って、界面強度が接
着剤自体の強度以上であるとき、接着剤のｍｖｐ、が最
大限に発揮され、最大の接着強度が得られることになる
。(Problem B to be solved by the invention) By the way, in the above adhesive method, the strength of the resulting adhesive part (hereinafter referred to as adhesive strength) depends on the strength of the adhesive itself and the relationship between the adhesive and the adherend such as a steel plate. It is controlled by the strength of the interface (hereinafter referred to as interfacial strength). Therefore, when the interfacial strength is greater than or equal to the strength of the adhesive itself, the mvp of the adhesive is maximized and the maximum adhesive strength is obtained.
ところが、前記従来の通常の熱延鋼板の製造方法によっ
て製造される熱延鋼板は、前記接着法により接着する場
合、接着剤自体の強度に比較して、界面強度が極めて低
く、接着強度が低いという欠点があり、その改善が要望
されている。However, when hot-rolled steel sheets manufactured by the conventional conventional hot-rolled steel sheet manufacturing method are bonded by the adhesive method, the interface strength is extremely low compared to the strength of the adhesive itself, and the adhesive strength is low. There is a drawback, and improvement thereof is desired.
この界面強度金高めるため、より適正な接着剤および接
着条件の選定が行われているが、これだけでは不充分で
ある。そこで、熱延ｍ板の表面（接着面）に、更に研削
加工等の機械加工、或いは、特殊媒体剤塗布等の化学処
理を施して界面強度を高める方法について検討されてい
る。しかし、これらの方法は、熱延鋼板に特別の加工お
よび処理を付加的に施すものであるので、製造工程数の
増加を招き、又製造コストの大幅な上？を招くという弊
害がある。又、充分な界面強度が得られていない。更に
、薄鋼板のプレス成形部材等のように、形状が複雑な被
着物においては、局部的な接着面加工および処理が実質
的に不可能となる。In order to increase this interfacial strength, more appropriate adhesives and bonding conditions have been selected, but this alone is insufficient. Therefore, methods of increasing the interfacial strength by further subjecting the surface (adhesive surface) of the hot-rolled m-plate to mechanical processing such as grinding or chemical processing such as coating with a special medium are being considered. However, these methods require additional special processing and treatment on the hot-rolled steel sheet, resulting in an increase in the number of manufacturing steps and a significant increase in manufacturing costs. This has the disadvantage of inviting Moreover, sufficient interfacial strength is not obtained. Furthermore, in the case of adherends with complicated shapes, such as press-formed members made of thin steel plates, localized bonding surface processing and treatment becomes substantially impossible.
本発明はこの様な事情に着目してなされたものであって
、その目的は従来のものがもつ以上のような問題点を解
消し、製造工程数の増加および製造コストの大幅な上昇
を招く事なく、界面強度を高めることができ、そのため
高い接着強度が得られる接着性熱延鋼板の製造方法を提
供しようとするものである。The present invention has been made in view of these circumstances, and its purpose is to solve the above-mentioned problems of the conventional methods, which lead to an increase in the number of manufacturing steps and a significant rise in manufacturing costs. The object of the present invention is to provide a method for producing an adhesive hot-rolled steel sheet that can increase the interfacial strength without causing any problems, thereby providing high adhesive strength.
（課題を解決するための手段）
上記目的を達成するために、本発明は次の様な構成の接
着性熱延鋼板の製造方法としている。即ち、本発明に係
る接着性熱延鋼板の製造方法は、Ｃ：０．０３〜０．３
０ ｉ＋ｔ％、Ｓｉ：１．Ｏ〜２．５ｗｔ％、Ｍｎ：０
．６〜３．０ｗｔ％、Ｓｏｌ、ＡＩ：０．０１〜０．１
０ｗｔＸを含み、残部が鉄及び不可避的不純物からなる
鋼を、熱間圧延し、コイル状に巻き取った後、酸洗処理
する接着性熱延鋼板の製造方法であって、前記熱間圧延
の仕上温度を８００’Ｃ以上にし、該熱間圧延仕上時点
からコイル巻き取り開始迄の間での鋼の平均冷却速度を
５０９Ｃ／ｓｅｃ以下にし、前記コイル巻き取りを５０
０〜６５０６Ｃの範囲内の温度で行い、前記酸洗処理を
塩酸濃度：５〜２０ｖｏｌ′１、温度；６５〜９５８Ｃ
の塩酸水溶液中に、２０〜１００秒間の範囲であり、且
つ、下記式の関係を満足する時間浸漬して行うことを特
徴とする接着性熱延鋼板の製造方法である。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for manufacturing an adhesive hot-rolled steel sheet having the following configuration. That is, the method for producing an adhesive hot-rolled steel sheet according to the present invention has C: 0.03 to 0.3.
0 i+t%, Si:1. O~2.5wt%, Mn: 0
．． 6-3.0wt%, Sol, AI: 0.01-0.1
A method for producing an adhesive hot-rolled steel sheet, in which a steel containing 0 wt The finishing temperature is set to 800'C or higher, the average cooling rate of the steel from the hot rolling finish to the start of coil winding is set to 509C/sec or lower, and the coil winding is carried out at 50°C.
The pickling treatment is carried out at a temperature within the range of 0 to 6506C, and the pickling treatment is carried out at a hydrochloric acid concentration of 5 to 20 vol'1 and a temperature of 65 to 958C.
This is a method for producing an adhesive hot-rolled steel sheet, which is characterized by immersing the sheet in an aqueous hydrochloric acid solution for a period of time ranging from 20 to 100 seconds and satisfying the relationship of the following formula.
１８００ ＜ＡｘＴｘ ｔ ””≦１９０００但し、上
式において、Ａは塩酸水溶液の塩酸濃度（νＯＩχ）、
Ｔは塩酸水溶液の温度（’Ｃ）、しは塩酸水溶液中への
浸漬時間（ｓｅｃ）である。1800 <AxTx t ””≦19000 However, in the above formula, A is the hydrochloric acid concentration (νOIχ) of the hydrochloric acid aqueous solution,
T is the temperature ('C) of the hydrochloric acid aqueous solution, and the immersion time (sec) in the hydrochloric acid aqueous solution.
（作 用）
本発明は、種々の組成の鋼について、種々の製造条件で
熱延鋼板（熱間圧延、コイル状に巻き取り、酸洗処理し
たもの〕を製造し、該熱延鋼板同志を接着法により接着
して接着Ｉを作り、これらについて熱延鋼板の製造条件
と、表面形状と、接着強度との関係を克明に調査した結
果、得られた下記知見に基づき完成されたものである。(Function) The present invention produces hot-rolled steel sheets (hot-rolled, wound into a coil, and pickled) using various manufacturing conditions for steels of various compositions, and then combines the hot-rolled steel sheets with each other. Adhesive I was created by bonding using an adhesive method, and the relationship between the manufacturing conditions of hot rolled steel sheets, surface shape, and adhesive strength was investigated in detail, and the result was completed based on the following knowledge obtained. .
第１図に、本発明に係る酸洗処理後の熱延鋼板の断面図
の一例を示す。尚、第１図は該鋼板の断面顕微鏡写真に
基づき、それを写して作成したものである。図中（１）
は鋼板の表面、（２）は１ｉｉｉｌ板の内部を示すもの
である。第２図に、表面形状（横軸：凹凸部の輪郭の線
長と直線長さとの比）と、接着強度（縦軸：引張接着強
度（Ｋｇ／ｃｍ２） ）との関係の一例を示す９酸洗処
理後の熱延鋼板が、第１図に示すような、孔食状の凹凸
形状の表面を有するとき、アンカー効果により接着強度
が向上する事を知見した。特に、該凹凸形状が、第２図
に示すように、該凹凸部の輪郭の線長と直線長さとの比
（以降、線長増加比という）が１．３以上であり、且つ
前記凹部の深さが４μ閤以上になったとき、接着強度が
顕著に向上するようになる事を知見した、尚、上記輪郭
の線長及び直線長さとは、例えば熱延鋼板の板幅方向で
観ると、後者は咳板幅であり、前者は凹凸部の輪郭に沿
った実長である。FIG. 1 shows an example of a cross-sectional view of a hot rolled steel sheet after pickling treatment according to the present invention. Incidentally, FIG. 1 was created based on a cross-sectional micrograph of the steel plate. (1) in the diagram
(2) shows the surface of the steel plate, and (2) shows the inside of the 1III plate. Figure 2 shows an example of the relationship between surface shape (horizontal axis: ratio of line length to straight line length of contour of uneven portion) and adhesive strength (vertical axis: tensile adhesive strength (Kg/cm2))9 It has been found that when the hot-rolled steel sheet after pickling treatment has a pitting-like uneven surface as shown in FIG. 1, the adhesive strength is improved due to the anchor effect. In particular, as shown in FIG. 2, the uneven shape has a ratio of the line length to the straight line length of the contour of the uneven portion (hereinafter referred to as line length increase ratio) of 1.3 or more, and It was found that when the depth was 4 μm or more, the bond strength significantly improved.The line length and straight line length of the above contour are, for example, when viewed in the width direction of a hot rolled steel plate. , the latter is the width of the cough plate, and the former is the actual length along the contour of the uneven portion.
このように接着強度が顕著に向上する凹凸形状は、従来
の熱延鋼板の製造方法では得られておらず、特定の熱延
鋼板製造条件で得られる事を知見した。It was discovered that the uneven shape that significantly improves adhesive strength as described above cannot be obtained by conventional hot-rolled steel sheet manufacturing methods, but can be obtained under specific hot-rolled steel sheet manufacturing conditions.
上記特定条件は、鋼の組成、熱間圧延条件、コイル巻き
取り温度、コイル巻き取り後の酸洗処理条件などと密接
な関係がある。即ち、該特定条件は、鋼の組成について
は、Ｃ：０．０３〜０．３０ｗｔ％、ＳＩ：１．０＝２
．５ｗＬ％、、Ｉ’！ｎ：０．０１ 〜０．１０ｎｔＸ
、Ｓｏｌ、Ａｌ ：０．０１〜０．１０ ｗｔχであ
る。上網の熱間圧延については、その仕上温度が８００
０Ｃ以上、核熱間圧延仕上時点からコイル巻き取り開始
迄の間での鋼の平均冷却速度（核間に低下した温度幅／
核間の時間幅）が５０６Ｃ／ｓｅｃ以下、又、コイル巻
き取り温度が５００〜６５０°Ｃの範囲内の温度である
。The above specific conditions are closely related to the steel composition, hot rolling conditions, coil winding temperature, pickling treatment conditions after coil winding, and the like. That is, the specific conditions are, for the composition of steel, C: 0.03 to 0.30 wt%, SI: 1.0 = 2
．． 5wL%,,I'! n: 0.01 ~ 0.10ntX
, Sol, Al: 0.01 to 0.10 wtχ. For hot rolling of the upper mesh, the finishing temperature is 800°C.
0C or higher, the average cooling rate of the steel from the time of finishing core hot rolling to the start of coil winding (temperature range decreased between cores/
The time width between cores) is 506C/sec or less, and the coil winding temperature is within the range of 500 to 650C.
更に、酸洗処理条件については、酸洗浴が塩酸４度：５
〜２０ｖｏｌ％、温度：６５〜９５’Ｃの塩酸水溶液で
あり、その浴中への浸漬時間が２０〜１００秒間の範囲
であり、且つ下記式の関係を満足する時間である。Furthermore, regarding the pickling treatment conditions, the pickling bath was hydrochloric acid 4:5
~20 vol%, aqueous hydrochloric acid solution at a temperature of 65 to 95'C, and the immersion time in the bath is in the range of 20 to 100 seconds, and is a time that satisfies the relationship of the following formula.
１８００−＜ Ａ Ｘ Ｔ Ｘ ｔ ””−≦−１９０
００但し、、上式において、Ａは塩酸ｉ１ｊ （ｖｏｌ
χ）、Ｔは温度（０Ｃ）、Ｅは浸漬時間（ｓｅｅ）であ
る。1800-< A X T X t ””-≦-190
00 However, in the above formula, A is hydrochloric acid i1j (vol
χ), T is the temperature (0C), and E is the immersion time (see).
そこで、本発明は、かかる特定条件を充たすようにした
ものである。即ち、本発明に係る接着性熱延ｍｉの製造
方法は、前記の如き構成としているので、上記特定条件
を充たし得る。Therefore, the present invention is designed to satisfy such specific conditions. That is, since the method for producing adhesive hot-rolled mi according to the present invention has the above-described configuration, it can satisfy the above-mentioned specific conditions.
故に、本発明に係る接着性熱延鋼板の製造方法によれば
、孔食状凹凸形状の表面を有する熱延鋼板であって、該
凹凸形状の線長増加比が１．３以−ヒであり、且つ該凹
部の深さが４μｍ以上である孔食状凹凸形状の表面を有
する接着性熱延鋼機が得られるようになる。従って、接
着強度を顕著に向上し得るようになるのである。Therefore, according to the method for producing an adhesive hot-rolled steel sheet according to the present invention, the hot-rolled steel sheet has a pitting-like uneven surface, and the wire length increase ratio of the unevenness is 1.3 or more. It is possible to obtain an adhesive hot-rolled steel machine having a pitting-like uneven surface in which the depth of the recessed portion is 4 μm or more. Therefore, adhesive strength can be significantly improved.
本発明に係る接着性熱延鋼板の製造方法において、鋼組
成に関してＣを０．０３〜０．３０ｗｔχとしているの
は、０．０３ｗｔ％未満では前記接着強度を向上し得る
孔食状凹凸形状が得られず、又、０．３０ｗｔ％を越え
ると前記凹部法さが４μ醜未満となり、接着強度が急激
に低下するからである。In the method for producing an adhesive hot-rolled steel sheet according to the present invention, C is set to 0.03 to 0.30wtχ in the steel composition, because if it is less than 0.03wt%, pitting-like unevenness that can improve the adhesive strength will occur. Moreover, if it exceeds 0.30 wt%, the recessed part thickness becomes less than 4μ, and the adhesive strength sharply decreases.
Ｓｉを１．０〜２．５ｗｔχとしているのは、１．０ｈ
ｔχ未満では前記孔食状凹凸形状が得られず、又、２．
５ｗｔχを越えると前記凹部法さが４μ−未満となり、
接着強度が急激に低下するからである。The reason why Si is 1.0 to 2.5wtχ is 1.0h.
If it is less than tχ, the pitting-like uneven shape cannot be obtained, and 2.
When it exceeds 5wtχ, the concave area becomes less than 4μ,
This is because the adhesive strength decreases rapidly.
Ｍｎを０．６〜３．Ｏｗｔχとしているのは、０．６ｗ
ｔχ未満では前記孔食状凹凸形状が得られず、又、３．
０１ｗｔχを越えると前記凹部法さが４μｍ未満となり
、接着強度が急激に低下するからである。 Ｓｏｌ、Ａ
ｌを０．０１〜０．１０ ｗｔχとしているのは、本発
明に係る接着性熱延鋼板の製造方法はＡ１キルド鋼に関
するものであり、０．０１ｗｔχ”未満では充分の脱酸
がなされず、又、Ｏ，１０ｗｔ、χを越えると脱酸効果
が飽和するからである。尚、Ｐ ＋ Ｃｕ ＋ （：
ｒ ＋ Ｔ ｒ等の元素は、接着強度に影響しないので
、これらを含んでも支障を来さないものである。Mn is 0.6-3. Owtχ is 0.6w
If it is less than tχ, the pitting-like uneven shape cannot be obtained, and 3.
This is because if the thickness exceeds 01 wtχ, the recess depth becomes less than 4 μm, and the adhesive strength sharply decreases. Sol, A
The reason why l is set to 0.01 to 0.10 wtχ is that the method for producing an adhesive hot rolled steel sheet according to the present invention relates to A1 killed steel, and if it is less than 0.01 wtχ, sufficient deoxidation is not achieved. Moreover, if O, 10wt, χ is exceeded, the deoxidizing effect is saturated.In addition, P + Cu + (:
Elements such as r + T r do not affect the adhesive strength, so their inclusion will not cause any problem.
熱間圧延に関し、熱間圧延の仕上温度を８００°Ｃ以上
にしているのは、８００’Ｃ未満では、フェライト域で
圧延される度合いが高くなり、鋼板表面に粗大な結晶が
生成し易くなるので、酸洗の際の腐食が不均一になり、
そのため前記接着強度を向１し得る孔食状凹凸形状を確
実に得るのが困難となり、接着強度を安定して向上させ
られなくなるからである。Regarding hot rolling, the finishing temperature of hot rolling is set to 800°C or higher, because if it is lower than 800'C, the degree of rolling will increase in the ferrite region, and coarse crystals will easily form on the surface of the steel sheet. Therefore, corrosion during pickling becomes uneven,
This is because it becomes difficult to reliably obtain a pitting-like uneven shape that can improve the adhesive strength, and it becomes impossible to stably improve the adhesive strength.
熱間圧延仕上時点からコイル巻き取り開始迄の間での綱
の平均冷却速度を５０°Ｃ／ｓｅｅ以下にしているのは
、５０°Ｃ／ｓｅｃ’ｊｘ越えると組織が不均一になる
ので、酸洗の際の腐食が不均一になり、そのため前記接
着強度を向上し得る孔食状凹凸形状が確実に得るのが困
難となり、接着強度を安定して向上させられなくなるか
らである。The reason why the average cooling rate of the steel from the time of finishing hot rolling to the start of coil winding is kept below 50°C/see is because if it exceeds 50°C/sec, the structure will become non-uniform. This is because the corrosion during pickling becomes non-uniform, making it difficult to reliably obtain pitting-like uneven shapes that can improve the adhesive strength, making it impossible to stably improve the adhesive strength.
コイル巻き取り温度を５００〜６５０６Ｃの範囲内の温
度にしているのは、５０００Ｃ未満で巻き取りした場合
は、酸洗の際の腐食が不均一になり、６５０°Ｃを越え
ると酸洗性が劣下し、生産性が低下するという弊害が生
じるからである。The reason why the coil winding temperature is within the range of 500 to 6506C is that if the coil is wound at less than 5000C, the corrosion during pickling will be uneven, and if it exceeds 650C, the pickling property will deteriorate. This is because the problem of deterioration and decreased productivity occurs.
酸洗処理に関し、その浴として塩酸水溶液を用いるよう
にしているのは、塩酸は表層部との反応が速く、地鉄に
対する反応が遅いため、表層部から溶解が進行し、硫酸
のようにスケールに亀裂を発生させる処理が不要となる
からである。又、酸洗浴中の鉄分濃度は酸洗の速度に影
響を及ぼすが、塩酸の場合は反応生成物のＦｅＣ１ｇの
溶解度が大きいため、他の酸に比較して上記影響が極め
て小さいからである。Regarding pickling treatment, we use aqueous hydrochloric acid as the bath because hydrochloric acid reacts quickly with the surface layer and slowly reacts with the base metal, so dissolution progresses from the surface layer and unlike sulfuric acid, scale is removed. This is because there is no need for any treatment that would cause cracks to occur. Further, the iron concentration in the pickling bath affects the speed of pickling, but in the case of hydrochloric acid, the solubility of 1 g of FeC as a reaction product is high, so the above-mentioned effect is extremely small compared to other acids.
塩酸水溶液の塩酸濃度を５〜２０ｖｏｌχとしているの
は、５ｖｏｌＸ未満では酸洗速度が低下して実生産での
道仮速度の大きな低下を余儀無くされる弊害が大きくな
り、又、２０ｖｏｌχを越えると地鉄の腐食がいたずら
に大きくなって歩留りが大きく低下するからである。The reason why the hydrochloric acid concentration of the hydrochloric acid aqueous solution is set to 5 to 20 volX is that if the concentration is less than 5 volX, the pickling speed will decrease and the speed in actual production will have to be significantly reduced, which will be a serious problem, and if it exceeds 20 volX, the This is because the corrosion of iron increases unnecessarily and the yield decreases significantly.
塩酸水溶液の温度を６５〜９５０Ｃとしているのは、６
５°Ｃ未満では実生産での反応不十分に起因して酸洗に
よるスケール除去そのものができなくなり、又、９５°
Ｃ壱越えると塩酸濃度とも関係するが過酸洗の程度が大
きくなり、歩留り低下が大きくなるからである。The reason why the temperature of the hydrochloric acid aqueous solution is 65 to 950C is 6.
If the temperature is below 5°C, scale removal by pickling will not be possible due to insufficient reaction in actual production;
This is because when C1 is exceeded, the degree of overpickling increases and the yield decreases, although this is related to the hydrochloric acid concentration.
塩酸水溶液中への浸漬時間を、先ず２０〜１００秒間の
範囲としているのは、２０秒未満では鋼板を広範囲にわ
たって均一にスケール除去する事が困難となり、又、１
００秒を越えると地鉄の過酸洗の程度が大きくなると共
に生産性低下が大きくなるからである。The reason why the immersion time in the hydrochloric acid aqueous solution is set in the range of 20 to 100 seconds is because if it is less than 20 seconds, it will be difficult to uniformly remove scale from the steel plate over a wide area;
This is because if the time exceeds 00 seconds, the degree of overpickling of the steel base increases and the productivity decreases significantly.
又、弐１８００ ＜ Ａ Ｘ Ｔ ｘ ｔ ”” ＜
１９０００の関係を満足する時間とし”ζいるのは、Ａ
ｘＴＸ１＋／ｌが１８００未満では、スケールが充分剥
離しないか、或いは前記孔食状凹凸形状が得られなくな
り、接着強度が急激に低下し、又、１９０００を越える
と生産性が著しく低下するばかりでなく、粒界浸食量が
大きくなり過ぎて、鋼板自体の強度の低下を招くからで
ある。Also, 21800 < A XT x t ”” <
The time required to satisfy 19,000 relationships is A.
If xTX1+/l is less than 1,800, the scale will not be peeled off sufficiently or the pitting-like uneven shape will not be obtained, and the adhesive strength will drop rapidly, and if it exceeds 19,000, not only will productivity drop significantly. This is because the amount of grain boundary erosion becomes too large, leading to a decrease in the strength of the steel sheet itself.
本発明に係る接着性熱延鋼板の製造方法は、工程的に観
ると、綱を熱間圧延し、コイル巻き取り後、酸洗処理す
るというものであり、従来の熱延鋼板の製造方法の場合
に比較し、製造工程数の増加を招くものではない。又、
それ故、製造コストの大幅な上昇を招（ものでもない。From a process perspective, the method for manufacturing adhesive hot-rolled steel sheets according to the present invention involves hot rolling a rope, winding it into coils, and then subjecting it to pickling treatment, which is different from the conventional method for manufacturing hot-rolled steel sheets. This does not result in an increase in the number of manufacturing steps compared to the case where the or,
Therefore, this will lead to a significant increase in manufacturing costs.
従って、本発明によれば、製造工程数の増加および製造
コストの大幅な上昇を招く事なく、高い接着強度を有す
る熱延鋼板が得られるようになるのである。Therefore, according to the present invention, a hot rolled steel sheet having high adhesive strength can be obtained without increasing the number of manufacturing steps or significantly increasing manufacturing costs.
（実施例） 本発明の実施例を以下に説明する。(Example) Examples of the present invention will be described below.
裏立阻上
組成が種々異なる転炉溶製鋼（スラブ）を１２００００
に加熱した後、板厚： ３．２１ａｍにする熱間圧延を
行い、次いでシャワー冷却し、コイル状に巻き取った。120,000 converter melted steels (slabs) with various compositions
After heating to 3.21 am, hot rolling was performed to obtain a plate thickness of 3.21 am, followed by shower cooling and winding into a coil.
尚、熱間圧延の仕上温度、熱間圧延仕上時点からコイル
巻き取り開始迄の間での鋼（３，２ｍｍ板）の平均冷却
速度、及び、コイル巻き取りの温度を種々変化させた。Note that the finishing temperature of hot rolling, the average cooling rate of the steel (3.2 mm plate) from the time of finishing hot rolling to the start of coil winding, and the temperature of coil winding were varied.
コイルを解きながら、１１ （３，２ｍｍ板）を酸洗ラ
インに送り、塩酸水溶液（浴）による酸洗処理を行った
。尚、この浴の塩酸濃度は９〜１３ｖｏｌ％、温度は８
０〜８５’Ｃの範囲で種々変化させた。又、浴への鋼（
３，２ｍｍ板）の浸漬時間は、２６〜３６秒間の範囲で
変化させた。これらの変化に伴い、ＡＸＴＸＬ＋／４の
値を４０６４〜５８０８の範囲で種々変化させた酸洗処
理された鋼板より、２０ｉ■φの円板を採取し、円板の
片面にエポキシ系樹脂接着剤（セメダイン１５００）を
塗布し、円板同志を合わせた後、加圧力４Ｋｇ／ｃｍ”
にして、８０’Ｃで１時間加熱して硬化熱処理を行った
。このようにして得られた接着材について、接着強度試
験を行った。尚、酸洗処理された鋼板について、断面の
顕微鏡観察を行い、酸洗処理後の熱延鋼板における孔食
状の凹凸形状部の輪郭の線長および凹部の深さを測定し
、又、線長増加比を求めた。While uncoiling, No. 11 (3.2 mm plate) was sent to the pickling line and subjected to pickling treatment with an aqueous hydrochloric acid solution (bath). The hydrochloric acid concentration in this bath was 9 to 13 vol%, and the temperature was 8.
Various changes were made in the range of 0 to 85'C. Also, steel to the bath (
The immersion time of the 3.2 mm plate was varied in the range of 26 to 36 seconds. Along with these changes, 20i■φ discs were collected from pickled steel plates with various AXTXL+/4 values in the range of 4064 to 5808, and one side of the discs was coated with epoxy resin adhesive. After applying (Cemedine 1500) and aligning the discs, apply a pressure of 4 kg/cm.
A curing heat treatment was performed by heating at 80'C for 1 hour. An adhesive strength test was conducted on the adhesive thus obtained. In addition, the cross section of the pickled steel sheet was observed under a microscope, and the line length and the depth of the concave portion of the pitting-like unevenness in the hot rolled steel sheet after the pickling treatment were measured. The length increase ratio was determined.
−・方、熱間圧延され、コイル状に巻き取られた鋼（３
，２ｍｍ板）の一部について、鋼板表面の機械切削を行
い、表面粗さがＲａにして０．１３の鋼板を得た。この
鋼板から、２０ｍｍφの円板を採取し、上記と同様の方
法により、円板同志の接着・硬化熱処理、及び、接着強
度試験を行った。−・Hot-rolled steel wound into a coil (3
, 2 mm plate), the surface of the steel plate was mechanically cut to obtain a steel plate with a surface roughness of Ra of 0.13. A 20 mm diameter disk was taken from this steel plate, and the disks were bonded together, hardened by heat treatment, and bonded strength tested in the same manner as described above.
接着強度試験結果を、線長増加比等と共に第３表に示す
、又、第１表に鋼組成、第２表に熱間圧延の仕上温度等
および酸洗処理条件を示す。The adhesive strength test results are shown in Table 3 along with the wire length increase ratio, etc. Table 1 shows the steel composition, and Table 2 shows the hot rolling finishing temperature, etc., and the pickling treatment conditions.
これらの表から判るように、従来の表面研削材を接着し
たもの（実験Ｎｏ、１０のもの）は、引張接着強度が６
３０Ｋｇ／ｃ＋ｅ”である。これは、熱間圧延上がりの
鋼板同志を接着したものに比較すると高い値であるが、
充分な接着強度ではない。As can be seen from these tables, the tensile adhesive strength of the conventional surface abrasive material (experiment No. 10) was 6.
30Kg/c+e". This is a high value compared to the case where hot-rolled steel plates are bonded together, but
Adhesive strength is not sufficient.
これに比較して、本発明に係る製造方法により得られた
熱延鋼板を接着したもの（実験Ｎｏ、１．３．４．７．
８及び９のもの）は、引張接着強度が８８０〜１０３０
Ｋｇ／ｃｓ”であって、極めて高い接着強度を有してい
る。In comparison, a hot-rolled steel sheet obtained by the manufacturing method according to the present invention was bonded (Experiment No. 1.3.4.7.
8 and 9) have a tensile adhesive strength of 880 to 1030.
Kg/cs" and has extremely high adhesive strength.
尚、実験Ｎｏ、 ２．５及び６のものは、熱間圧延後酸
洗処理して得た熱延鋼板を接着したものであるが、該鋼
板の製造条件は本発明に係る製造方法での製造条件とは
異なっている。そのため、引張接着強度が５８０〜６３
０Ｋｇ／ｃｍ”であり、比較的接着強度が低い、これは
、本発明に係る製造方法の場合に比較し、実ｐ Ｎｏ、
２のものはコイル巻き取り第２表
第１表
第３表
温度が低く、実験Ｎｏ、 ５及び６のものはＣ量が低い
ためである。In addition, in Experiment Nos. 2.5 and 6, hot-rolled steel sheets obtained by pickling treatment after hot rolling were bonded, but the manufacturing conditions for the steel sheets were the same as in the manufacturing method according to the present invention. The manufacturing conditions are different. Therefore, the tensile adhesive strength is 580-63
0 Kg/cm", and the adhesive strength is relatively low. This is compared to the manufacturing method according to the present invention, and the actual p No.
This is because the coil winding temperature in Table 2, Table 1, and Table 3 of Experiment No. 2 is low, and the amount of C in Experiment Nos. 5 and 6 is low.
（発明の効果）
本発明に係る接着性熱延鋼板の製造方法によれば、製造
工程数の増加および製造コストの大幅な上昇を招く事な
く、高い接着強度を有する接着性熱延鋼板が得られるよ
うになる。(Effects of the Invention) According to the method for producing an adhesive hot-rolled steel sheet according to the present invention, an adhesive hot-rolled steel sheet having high adhesive strength can be obtained without increasing the number of manufacturing steps or significantly increasing the manufacturing cost. You will be able to do it.
更に、薄鋼板のプレス成形部材等のように、形状が複雑
な被着物においても、問題なく高い接着強崩を得ること
が可能となる。Furthermore, it is possible to obtain high adhesive strength without problems even on adherends with complicated shapes, such as press-formed members of thin steel plates.
第１図は、本発明に係る酸洗処理後の熱延ｍ板の断面図
の一例を示す図、第２図は、表面形状（横軸；凹凸部の
輪郭の線長と直線長さとの比）と、接着強度（縦軸：引
張接着強度（Ｋｇ／Ｃｏｔ”） ）との関係の一例を示
す図である。
（１）−Ｉ板の表面 （２）−鋼板の内部特許出願
人 株式会社 神戸製鋼所
代理人 弁理士 金丸 章−
第１図
第２図FIG. 1 is a diagram showing an example of a cross-sectional view of a hot-rolled m-plate after pickling treatment according to the present invention, and FIG. (1) - Surface of I plate (2) - Internal patent applicant stock of steel plate Company Kobe Steel Representative Patent Attorney Akira Kanemaru - Figure 1 Figure 2
Claims (1)
２．５ｗｔ％、Ｍｎ：０．６〜３．０ｗｔ％、Ｓｏｌ．
Ａｌ：０．０１〜０．１０ｗｔ％を含み、残部が鉄及び
不可避的不純物からなる鋼を、熱間圧延し、コイル状に
巻き取った後、酸洗処理する接着性熱延鋼板の製造方法
であって、前記熱間圧延の仕上温度を８００℃以上にし
、該熱間圧延仕上時点からコイル巻き取り開始迄の間で
の鋼の平均冷却速度を５０℃／ｓｅｃ以下にし、前記コ
イル巻き取りを５００〜６５０℃の範囲内の温度で行い
、前記酸洗処理を塩酸濃度：５〜２０ｖｏｌ％、温度：
６５〜９５℃の塩酸水溶液中に、２０〜１００秒間の範
囲であり、且つ、下記式の関係を満足する時間浸漬して
行うことを特徴とする接着性熱延鋼板の製造方法。 １８００≦Ａ×Ｔ×ｔ＾１＾／＾２≦１９０００但し、
上式において、Ａは塩酸水溶液の塩酸濃度（ｖｏｌ％）
、Ｔは塩酸水溶液の温度（℃）、ｔは塩酸水溶液中への
浸漬時間（ｓｅｃ）である。(1) C: 0.03~0.30wt%, Si: 1.0~
2.5wt%, Mn: 0.6-3.0wt%, Sol.
A method for producing an adhesive hot-rolled steel sheet, in which a steel containing 0.01 to 0.10 wt% of Al, with the balance consisting of iron and unavoidable impurities, is hot-rolled, wound into a coil, and then pickled. The finishing temperature of the hot rolling is 800°C or higher, the average cooling rate of the steel from the time of finishing the hot rolling to the start of coil winding is 50°C/sec or lower, and the coil winding is is carried out at a temperature within the range of 500 to 650°C, and the pickling treatment is carried out at a hydrochloric acid concentration of 5 to 20 vol% and a temperature of:
A method for producing an adhesive hot-rolled steel sheet, comprising immersing it in an aqueous hydrochloric acid solution at 65 to 95° C. for a period of time ranging from 20 to 100 seconds and satisfying the relationship of the following formula. 1800≦A×T×t^1^/^2≦19000 However,
In the above formula, A is the hydrochloric acid concentration (vol%) of the hydrochloric acid aqueous solution
, T is the temperature of the hydrochloric acid aqueous solution (° C.), and t is the immersion time in the hydrochloric acid aqueous solution (sec).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29180288A JPH02138489A (en) | 1988-11-17 | 1988-11-17 | Production of adhesive hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29180288A JPH02138489A (en) | 1988-11-17 | 1988-11-17 | Production of adhesive hot rolled steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02138489A true JPH02138489A (en) | 1990-05-28 |
Family
ID=17773615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29180288A Pending JPH02138489A (en) | 1988-11-17 | 1988-11-17 | Production of adhesive hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02138489A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069437A (en) * | 2006-09-15 | 2008-03-27 | Nisshin Steel Co Ltd | Method for producing hot dip galvanized steel sheet suppressive in spangle pattern |
| US20090014095A1 (en) * | 2006-03-31 | 2009-01-15 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | High-strength cold rolled steel sheet excelling in chemical treatability |
| GB2437954B (en) * | 2005-03-30 | 2010-12-08 | Kobe Steel Ltd | High strength hot rolled steel sheet excellent in phosphatability |
-
1988
- 1988-11-17 JP JP29180288A patent/JPH02138489A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2437954B (en) * | 2005-03-30 | 2010-12-08 | Kobe Steel Ltd | High strength hot rolled steel sheet excellent in phosphatability |
| US7960035B2 (en) | 2005-03-30 | 2011-06-14 | Kobe Steel, Ltd. | High-strength hot-rolled steel sheet excellent in chemical treatability |
| US20090014095A1 (en) * | 2006-03-31 | 2009-01-15 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | High-strength cold rolled steel sheet excelling in chemical treatability |
| US8795442B2 (en) * | 2006-03-31 | 2014-08-05 | Kobe Steel, Ltd. | High-strength cold rolled steel sheet excelling in chemical treatability |
| JP2008069437A (en) * | 2006-09-15 | 2008-03-27 | Nisshin Steel Co Ltd | Method for producing hot dip galvanized steel sheet suppressive in spangle pattern |
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