JPH0668155B2 - Method for producing enameled steel sheet with excellent press formability and enamel adhesion - Google Patents
Method for producing enameled steel sheet with excellent press formability and enamel adhesionInfo
- Publication number
- JPH0668155B2 JPH0668155B2 JP61287641A JP28764186A JPH0668155B2 JP H0668155 B2 JPH0668155 B2 JP H0668155B2 JP 61287641 A JP61287641 A JP 61287641A JP 28764186 A JP28764186 A JP 28764186A JP H0668155 B2 JPH0668155 B2 JP H0668155B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- surface roughness
- enamel
- adhesion
- press formability
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 55
- 239000010959 steel Substances 0.000 title claims description 55
- 210000003298 dental enamel Anatomy 0.000 title claims description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 230000003746 surface roughness Effects 0.000 claims description 34
- 238000005554 pickling Methods 0.000 claims description 13
- 238000005096 rolling process Methods 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims description 7
- 238000005238 degreasing Methods 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 2
- 238000005097 cold rolling Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 17
- 239000010960 cold rolled steel Substances 0.000 description 7
- 230000004580 weight loss Effects 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 241000080590 Niso Species 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ほうろう鋼板の製造方法に関し、特にプレス
成形性およびほうろう密着性の優れたほうろう直接１回
がけ鋼板の有利な製造方法についての提案である。Description: TECHNICAL FIELD The present invention relates to a method for producing an enameled steel sheet, and in particular, a proposal for an advantageous method for producing an enameled single-pass wrought steel sheet having excellent press formability and adhesiveness. Is.
（従来の技術） ほうろうは美麗な表面と優れた耐蝕性を有するため厨房
器具、衛生器具、パネル、化学容器などの広い範囲に用
いられている。(Prior Art) Enamel is used in a wide range of kitchen appliances, sanitary appliances, panels, chemical containers, etc. due to its beautiful surface and excellent corrosion resistance.
中でも厨房器具や浴槽などに使用されるほうろうがけ鋼
板は優れた深絞り性が要求される。深絞り性向上のため
には、該鋼板の機械的特性として高い延性（El）と高い
ランクフォード（ｒ値）が必要である。Above all, enameled steel sheets used for kitchen appliances and bathtubs are required to have excellent deep drawability. In order to improve the deep drawability, high ductility (El) and high rank Ford (r value) are required as mechanical properties of the steel sheet.
しかし、ほうろう（がけ）鋼板は、ほうろう用冷延鋼板
に釉薬を塗布、焼成して製造するが、焼成温度800〜850
℃で鋼板に侵入した水素が冷却中に鋼板と釉薬との境界
に凝集し、その圧力で釉薬をはじき飛ばす所謂“つまと
び”が発生する。However, enameled steel plates are produced by applying glaze to a cold rolled steel plate for enamels and firing it.
The hydrogen that has penetrated into the steel sheet at ℃ condenses at the boundary between the steel sheet and the glaze during cooling, and the so-called "snail" that repels the glaze due to the pressure is generated.
一般に、この“つまとび”を防止する方法としては、酸
素含有量を高くして鋼中に介在物を多くしたり、Ti、
Ｂ、Nb、Ｖ等の炭化物、窒化物、硫化物を析出させる方
法が用いられていた。しかし、鋼中の介在物や析出物を
多くすると深絞り性が劣化する。したがって、深絞り性
が要求される用途でのほうろう用鋼板の製造には限界が
あった。特に厨房器具の場合、多様化するニーズに応ず
るため形状がより複雑化し、成形の困難な部品は溶接に
より製造しているのが現状である。ところが、かかる溶
接工法では、工数が増えるだけでなく溶接部のほうろう
密着性や形状、泡欠陥等の問題があり、一体成形が可能
なほうろう用冷延鋼板が望まれていた。Generally, as a method of preventing this “snail”, the oxygen content is increased to increase the inclusions in the steel, Ti,
A method of depositing carbides such as B, Nb and V, nitrides and sulfides has been used. However, if there are many inclusions and precipitates in the steel, the deep drawability deteriorates. Therefore, there is a limit to the production of enamel steel plates for applications requiring deep drawability. In particular, in the case of kitchen appliances, the shape is more complicated in order to meet diversifying needs, and at present, parts that are difficult to form are manufactured by welding. However, in such a welding method, not only the number of steps is increased, but also there are problems such as adhesiveness, shape and bubble defects of the welded portion, and a cold rolled steel sheet for enamel which can be integrally formed has been desired.
さて、実際のプレス成形においては、その評価基準は従
来用いられてきたほうろう用鋼板の機械的特性（ｒ値、
El値、ｎ値）だけでは不十分である。たとえば、鋼板表
面粗度あるいは潤滑油等もプレス成形性に大きな影響を
およぼすことが知られている。すなわち、浴槽をプレス
加工する際、高粗度材の方が良好なプレス成形性を示す
ことなどがそれである。In the actual press forming, the evaluation criteria are the mechanical properties (r value,
El value and n value) are not enough. For example, it is known that the surface roughness of steel sheet or lubricating oil has a great influence on press formability. That is, when the bath is pressed, the high-roughness material exhibits better press formability.
このプレス成形性に及ぼす鋼板表面粗度の影響を究明し
た公知技術もいくつか提案されている。たとえば、「塑
性と加工」vol３No.14(1962-3)では、高粘度潤滑油の場
合数μｍ程度の鋼板表面粗度で最も絞り性が向上するこ
とを開示している。また、特公昭59-34441号公報では、
ロール表面粗度（Ra）と１インチ当りのピーク数（PP
I）とがそれぞれRa＝2.8（μｍ）、PPI＝226なるダルロ
ールで調質圧延することにより、塗装後外観性およびプ
レス加工性に優れるほうろう用冷延鋼板の調質圧延法が
示されている。Several known techniques have been proposed to investigate the influence of the surface roughness of the steel sheet on the press formability. For example, “Plasticity and Working” vol 3 No. 14 (1962-3) discloses that in the case of a high-viscosity lubricating oil, the drawability is most improved with a steel plate surface roughness of about several μm. In addition, in Japanese Patent Publication No. 59-34441,
Roll surface roughness (Ra) and peak number per inch (PP
I) and Ra are 2.8 (μm) and PPI = 226, respectively. By temper rolling with a dull roll, a temper rolling method for cold rolled steel sheet for enamel, which has excellent appearance and press workability after painting, has been shown. .
これらの公知技術に共通することは、プレス成形性を向
上させるという点では優れた技術であるが、いずれも鋼
板表面性状の規制を細かく管理しなくてはならないとい
う欠点があった。さらに、これらの公知技術は、任意の
表面粗度（Ra、PPI）を有し、かつプレス成形性および
ほうろう密着性にも優れたほうろう用冷延鋼板の製造に
関して何等示唆を与えていない。What is common to these known techniques is an excellent technique in terms of improving press formability, but all of them have a drawback that the regulation of the steel sheet surface property must be finely controlled. Furthermore, these known techniques do not give any suggestion regarding the production of cold-rolled steel sheets for enamels having arbitrary surface roughness (Ra, PPI) and excellent in press formability and enamel adhesion.
一方、ほうろうの密着性を高める方法として、鋼中のC
u，Ｐ含有量を調製する方法が特開昭55-47368号公報や
特開昭57-63661号公報などに開示されている。この鋼中
Cu，Ｐ含有量を調整すると直接１回がけほうろうの密着
性が良好となること、および酸洗減量値を70g／m2から4
5g／m2まで少なくすることができることが示されてい
る。On the other hand, as a method to increase the adhesiveness of enameled C
Methods for adjusting the u and P contents are disclosed in JP-A-55-47368 and JP-A-57-63661. In this steel
If the Cu and P contents are adjusted, the adhesion of the enamel directly once becomes good, and the pickling weight loss value is 70 g / m 2 to 4
It has been shown that it can be reduced to 5 g / m 2 .
また、一般に、ほうろう前処理における酸洗は、鋼板表
面に凹凸を形成せしめて機械的な密着を高め、次工程で
のNi付着を促進して、ほうろう密着性を改善すると考え
られている。しかし前処理での過酸洗は泡、黒点等のほ
うろう欠陥が発生しやすくなり、過剰なNi付着を導いて
密着性を劣化する。したがって、良好な密着性を得るた
め、と公害問題や廃酸処理の問題から酸洗減量値はより
少ない程好ましいと言える。Further, it is generally considered that the pickling in the pretreatment of enamel enhances mechanical adhesion by forming irregularities on the surface of the steel sheet, promotes Ni adhesion in the next step, and improves enamel adhesion. However, pre-pickling with peroxidation easily causes enamel defects such as bubbles and black spots, leading to excessive Ni adhesion and deteriorating adhesion. Therefore, it can be said that the smaller the pickling weight loss value is, the more preferable in order to obtain good adhesion and from the problems of pollution and waste acid treatment.
（発明が解決しようとする問題点） 本発明の目的は、上述した各従来技術が抱えている欠点
を解消し、表面粗度パターンに方向性をもたせることに
より、表面粗度に無関係にプレス成形性に優れかつ密着
性に優れたほうろうがけ鋼板を製造する技術の提供を目
指すものである。(Problems to be Solved by the Invention) An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional techniques and to give directionality to the surface roughness pattern, so that press molding can be performed regardless of the surface roughness. The aim is to provide technology for manufacturing enamel-coated steel sheets that have excellent adhesiveness and adhesiveness.
（問題点を解決するための手段） 上掲の課題解決の手段として本発明は、冷間圧延、焼
鈍、調質圧延、脱脂、酸洗、ニッケルめっき、施釉及び
焼成の各工程からなる処理を経てほうろう鋼板を製造す
るに当り、 前記調質圧延工程において、下記式で示される鋼板表面
粗度の規則性を表わす規則度パラメータＳ： ここでｘｉ：鋼板表面凸部ピーク間の距離（μｍ） 少なくとも一方向について０＜Ｓ0.25を示し、平均表
面粗度Ra（μｍ）と平均谷間隔Lmv（μｍ）との積；Ra
×Lmvが２〜100μm2を示す表面粗度の鋼板を調製するこ
とを特徴とするプレス成形性およびほうろう密着性に優
れたほうろう鋼板の製造方法、を骨子とする技術を提案
する。(Means for Solving Problems) As a means for solving the above-mentioned problems, the present invention provides a treatment consisting of cold rolling, annealing, temper rolling, degreasing, pickling, nickel plating, glaze and firing. Then, in manufacturing the enameled steel sheet, in the temper rolling step, a regularity parameter S representing the regularity of the surface roughness of the steel sheet represented by the following formula: Where x i : distance between peaks of convex portions of steel sheet surface (μm) 0 <S0.25 in at least one direction, and the product of the average surface roughness Ra (μm) and the average valley interval Lmv (μm); Ra
We propose a technique based on a method for producing an enameled steel sheet having excellent press formability and enamel adhesiveness, which is characterized by preparing a steel sheet having a surface roughness of × Lmv of 2 to 100 μm 2 .
（作用） 以下に本発明方法を着想するに至った経緯について、発
明者らが行った実験結果に基づき説明する。この実験に
用いた供試鋼は下記の表１に示されるほうろう用鋼板を
用いた。(Operation) The background of the idea of the method of the present invention will be described below based on the results of experiments conducted by the inventors. The test steels used in this experiment were the enamel steel plates shown in Table 1 below.
供試鋼板をレーザーによるダル加工（以下「レーザーダ
ル加工」という）を施したスキンパスロールでスキンパ
ス圧延を行った。この時レーザーダル加工法を種々変え
ることにより鋼板表面の粗度パターンを変化させた。The test steel sheet was skin-pass rolled with a skin-pass roll that was laser-dulled (hereinafter referred to as "laser dull processing"). At this time, the roughness pattern on the surface of the steel sheet was changed by variously changing the laser dull processing method.
第１図に、後に詳述する鋼板表面粗度パターンの規則度
パラメーターＳ値と限界絞り比の関係を示す。このＳ値
は圧延方向について測定値であり、平均表面粗度（Ra）
はいずれも1.2μｍである。この図から判るように限界
絞り比はＳ値に強く依存し、かつＳ≦0.25で該限界絞り
比が飛躍的に大きくなることから、このＳ値を0.25以下
とすることによりプレス成形性が著しく向上することが
判った。 FIG. 1 shows the relationship between the degree of regularity parameter S of the steel plate surface roughness pattern, which will be described in detail later, and the limit drawing ratio. This S value is a measured value in the rolling direction, and the average surface roughness (Ra)
Is 1.2 μm in each case. As can be seen from this figure, the limiting drawing ratio strongly depends on the S value, and when S ≦ 0.25, the limiting drawing ratio becomes drastically large. Therefore, by setting the S value to 0.25 or less, the press formability becomes remarkable. It turned out to improve.
また、第２図にスキンパス圧延後の鋼板表面粗度Ra（μ
ｍ）と平均谷間隔Lmv（μｍ）との積Ra×Lmvとほうろう
焼成後のほうろう密着性を調べた結果を示す。In addition, Fig. 2 shows the surface roughness Ra (μ
m) and the average valley interval Lmv (μm), the product Ra × Lmv, and the results of examining the enamel adhesion after firing enamel are shown.
この時スキンパス圧下率は0.8％、Ｓ値は0.13である。
ほうろう焼成は、アルカリ脱脂後、10％H2SO4(75℃)で
各10分酸洗した後、２％NiSO4(65℃)に10分間浸漬する
前処理を行った。前記前処理後、市販のチタン釉を直接
１回施釉して820℃で焼成した。焼成後P.E.I.試験機を
用いて、ほうろうの密着度を測定した（P.E.I.（％）は
０：全面剥離、100：剥離なし）。At this time, the skin pass reduction rate is 0.8% and the S value is 0.13.
The enamel baking was carried out by performing a pretreatment of degreasing with alkali, pickling with 10% H 2 SO 4 (75 ° C.) for 10 minutes each, and then dipping in 2% NiSO 4 (65 ° C.) for 10 minutes. After the pretreatment, a commercially available titanium glaze was directly glazed once and fired at 820 ° C. After firing, the enamel adhesion was measured using a PEI tester (PEI (%) is 0: peeling on the whole surface, 100: peeling off).
第２図から明らかなように、ほうろう密着性（P.E.I.）
はRa×Lmv100では著しく劣化し、一方Ra×Lmv≧２で
も密着性は急激に低下する。As is clear from Fig. 2, enamel adhesion (PEI)
Is markedly deteriorated when Ra × Lmv100, while the adhesion is sharply reduced even when Ra × Lmv ≧ 2.
さらに、さらにＳ値の異なる試料（Ra×Lmv＝10〜20）
を用いて、酸洗減量を変えた時の直接１回がけほうろう
焼成を行った後の密着性試験の結果を第３図に示す。こ
の第３図から判るように、Ｓ値の大きい従来材（Ｓ＝0.
40）の場合、良好な密着性は酸洗減量が70g／m2で得ら
れるが、Ｓ値が0.05と小さい本発明にかかる試料では10
g／m2でも良好な密着が得られている。換言すると、Ｓ
値を小さくすることによって、ほうろう密着性の向上を
はかることができる。Furthermore, samples with different S values (Ra × Lmv = 10 to 20)
Fig. 3 shows the result of the adhesion test after directly carrying out the single enamel baking by changing the pickling weight loss by using. As can be seen from FIG. 3, the conventional material with a large S value (S = 0.
In the case of 40), good adhesion can be obtained at a pickling weight loss of 70 g / m 2 , but the sample according to the present invention having a small S value of 0.05 is 10
Good adhesion is obtained even at g / m 2 . In other words, S
By reducing the value, it is possible to improve the adhesion of enamel.
上述した基礎的実験データの結果から、本発明は製造条
件を以下のように規制すれば、プレス成形性とほうろう
密着性とに優れ、かつほうろうの前処理工程が省略可能
な冷延鋼板の製造が可能となることを見い出した。From the results of the basic experimental data described above, the present invention is excellent in press formability and enamel adhesion if the manufacturing conditions are regulated as follows, and the production of a cold-rolled steel sheet in which the pretreatment step of enamel can be omitted. I found that is possible.
まず、本発明において最も重要な条件は、鋼板表面粗度
パターンである。かかる鋼板表面粗度パターンを示す条
件の１つである該鋼板表面粗度の規則性を表わす規則度
パラメーターＳは、鋼板表面凸部ピーク間距離をｘｉと
した時、下記のように表わすことができる。First, the most important condition in the present invention is the steel plate surface roughness pattern. The regularity parameter S representing the regularity of the steel plate surface roughness, which is one of the conditions indicating the steel plate surface roughness pattern, is expressed as follows when the distance between the peaks of the convex portions of the steel plate surface is x i. You can
また平均谷間隔Lmvは、第４図に示す鋼板表面粗度パタ
ーンにおいて、 なる式で表わせる。 Also, the average valley interval Lmv is, in the steel plate surface roughness pattern shown in FIG. Can be expressed as
要するに、表面粗度の規則性を表わす規則度パラメータ
ーＳは、少なくとも１方向についてＳ≦0.25を満たすこ
とが必須である。第１図から判るように、Ｓ＞0.25では
優れたプレス成形性を得ることができない。因みに、従
来の冷延鋼板ではＳ値は0.3〜0.5程度である。In short, it is essential that the regularity parameter S representing the regularity of the surface roughness satisfies S ≦ 0.25 in at least one direction. As can be seen from FIG. 1, when S> 0.25, excellent press formability cannot be obtained. Incidentally, the S value of the conventional cold-rolled steel sheet is about 0.3 to 0.5.
また、次に重要な条件は、平均表面粗度Ra（μｍ）と平
均谷間隔Lmv（μｍ）との関係であり、この関係（Ra×L
mv）が２〜100となるようにすることが必須である。Ra
×Lmv≦２またはRa×Lmv＞100では、良好なほうろう密
着性を得ることができない。その上にＳ値の小さいもの
の方がほうろう密着性には有利である。The next most important condition is the relationship between the average surface roughness Ra (μm) and the average valley interval Lmv (μm).
It is essential that the mv) be 2-100. Ra
If xLmv ≦ 2 or Ra × Lmv> 100, good enamel adhesion cannot be obtained. In addition, the one having a smaller S value is more advantageous for the adhesiveness of enameled.
なお、このような規則的な鋼板表面粗度パターンを得る
ためには、ロールの表面粗度パターンも必然的に規則的
でなければいけない。そのためのロールの加工法として
は、放電ダル加工法、レーザーダル加工法、あるいは特
別に製造したグリッドを使用するショットブラスト法が
好適である。In addition, in order to obtain such a regular steel plate surface roughness pattern, the surface roughness pattern of the roll must necessarily be regular. As a roll processing method therefor, a discharge dull processing method, a laser dull processing method, or a shot blast method using a specially manufactured grid is suitable.
本発明における鋼板表面粗度パターンが、Ｓ≦0.25およ
びRa×Lmv：２〜100さえ満たしていてば、鋼板表面粗
度、たとえば平均表面粗度（Ra）、１インチ当りのピー
ク数（PPI）、さらに潤滑油の種類、プレス条件等は任
意でよい。If the steel plate surface roughness pattern in the present invention satisfies S ≦ 0.25 and Ra × Lmv: 2 to 100, the steel plate surface roughness, for example, average surface roughness (Ra), peak number per inch (PPI) Further, the type of lubricating oil, pressing conditions, etc. may be arbitrary.
なお、本発明における規則的な表面粗度パターンの効果
としては、鋼板表面凹部にたまった潤滑油が均等に凸部
へと供給されることに起因して潤滑条件が良好になるも
のと考えられる。さらに凸部の金属接触部分が規則的に
存在することにより、鋼板表面とプレス金型との摩擦状
態も変化しているものと考えられる。As an effect of the regular surface roughness pattern in the present invention, it is considered that the lubricating oil accumulated in the steel plate surface concave portions is uniformly supplied to the convex portions to improve the lubricating condition. . Furthermore, it is considered that the frictional state between the steel plate surface and the press die is changed due to the regular presence of the metal contact portions of the convex portions.
また、ほうろう密着性に関しては、鋼板表面粗度パター
ンが酸洗後の表面性状に影響をおよぼして機械的な密着
結合を向上させること、さらにこれは前処理時のNi付着
にも影響をおよぼしていることも考えられる。Regarding enamel adhesion, the steel plate surface roughness pattern affects the surface properties after pickling and improves the mechanical adhesive bond, and this also affects Ni adhesion during pretreatment. It is possible that
（実施例） 第２表に示す化学組成の鋼片を転炉−連続鋳造法により
製造し、得られた鋼片を1250℃に加熱−均熱後、粗圧延
−仕上圧延により3.2mm板厚の熱延鋼板とした。この鋼
板を酸洗後、冷間圧延により0.8mm板厚の冷延鋼板と
し、連続焼鈍（均熱温度750℃〜850℃）を施した後スキ
ンパス圧延（圧下率0.8％）を行った。(Example) A steel piece having a chemical composition shown in Table 2 was produced by a converter-continuous casting method, and the obtained steel piece was heated to 1250 ° C-soaking, and then rough rolling-finish rolling to a 3.2 mm plate thickness. Of hot rolled steel sheet. This steel sheet was pickled, cold-rolled to a cold-rolled steel sheet having a thickness of 0.8 mm, continuously annealed (soaking temperature 750 ° C to 850 ° C), and then skin-pass rolled (0.8% reduction).
なお、ここでスキンパスロールは、ショットブラストお
よびレーザー加工によりダル目付けを行ったものを使用
した。The skin pass roll used here was dull weighted by shot blasting and laser processing.
鋼板表面粗度は、圧延方向について調査し、平均表面粗
度Ra、１インチ当りのピーク数PPI、パラメーターＳ
値、平均谷間隔Lmvを求めた。引張特性は、JIS５号試験
片により求めた。すなわち、ｒ値は15％引張予歪を与
え、３点法により測定し、Ｌ（圧延）方向、Ｃ（圧延方
向に対して90°）方向、Ｄ（圧延方向に対して45°）方
向の平均値ｒ＝（rL＋rC＋２rD）／４で求めた。The steel sheet surface roughness was investigated in the rolling direction, and the average surface roughness Ra, the number of peaks per inch PPI, the parameter S
The value and the average valley interval Lmv were obtained. The tensile properties were determined using JIS No. 5 test pieces. That is, the r value was given a 15% tensile prestrain and was measured by the three-point method, and the L (rolling) direction, the C (90 ° to the rolling direction) direction, and the D (45 ° to the rolling direction) direction were measured. mean value r = obtained in (r L + r C + 2r D) / 4.
限界絞り比（L.D.R.）は、ポンチ直径32mmの金型を用い
て深絞りしうる最大素板径DOmaxを求め、ポンチ直径dp
との比から求めた。すなわち 絞り条件は、絞り速度１mm／ｓ、潤滑油は防錆油（オイ
ルタイプ）を用い、全て同一条件にて行った。For the limit drawing ratio (LDR), find the maximum blank diameter D O max that can be deep-drawn using a die with a punch diameter of 32 mm, and punch diameter dp
It was calculated from the ratio with. Ie The drawing conditions were as follows: a drawing speed of 1 mm / s, a rust preventive oil (oil type) was used as a lubricating oil.
ほうろう焼成工程では、酸洗減量が30g／m2で一定にな
るように酸洗し、２％NiSO4(65℃)で10分浸漬を行い、
市販のチタン釉を施釉し、820℃で３分の焼成を行っ
た。焼成後P.E.I.試験機でほうろうの密着度を測定し
た。In the enamel firing process, pickling was carried out so that the weight loss was 30 g / m 2 and then dipping in 2% NiSO 4 (65 ℃) for 10 minutes.
A commercially available titanium glaze was applied and baked at 820 ° C. for 3 minutes. After firing, the adhesion of enamel was measured with a PEI tester.
第３表にスキンパスロールのダル目付方法、表面粗度、
材料特性およびほうろうの密着性を示す。本発明範囲内
にて製造したほうろうがけ鋼板は比較鋼にくらべて優れ
たプレス成形性とほうろう密着性を示していた。Table 3 shows the skin pass roll dull weight method, surface roughness,
Shows material properties and enamel adhesion. The enamel steel sheet produced within the scope of the present invention showed superior press formability and enamel adhesion to the comparative steel.
（発明の効果） 以上の説明ならびに実施例の結果から判るように本発明
によれば、鋼板表面に規則的な粗度パターンを付与し、
かつ平均表面粗度と平均谷間隔との積を規制することに
より、同一材質の鋼板においてもプレス成形性は格段に
向上し、その使用範囲が拡がるとともに、難易度の高い
成形も可能となる。さらに、鋼板表面に規則的な粗度パ
ターンを付与することにより、少ない酸洗減量で良好な
ほうろう密着性が得られるため、廃酸処理の頻度が減少
するなどの効果も期待される。 (Effect of the invention) As can be seen from the above description and the results of the examples, according to the present invention, a regular roughness pattern is imparted to the surface of the steel sheet,
Moreover, by controlling the product of the average surface roughness and the average valley interval, the press formability of the steel sheet of the same material is remarkably improved, the range of use thereof is expanded, and the forming with high difficulty becomes possible. Furthermore, by imparting a regular roughness pattern to the surface of the steel sheet, good enamel adhesion can be obtained with a small amount of pickling, so that the effect of reducing the frequency of waste acid treatment is expected.
第１図は、限界絞り比におよぼす規則度パラメータＳ値
の影響を示すグラフである。 第２図は、ほうろう密着性におよぼすRa×Lmvの影響を
示すグラフである。 第３図は、酸洗減量とほうろう密着性を示すグラフであ
る。 第４図は、鋼板表面粗度プロフィールを示す図である。FIG. 1 is a graph showing the influence of the regularity parameter S value on the limiting aperture ratio. FIG. 2 is a graph showing the effect of Ra × Lmv on enamel adhesion. FIG. 3 is a graph showing the pickling weight loss and the enamel adhesion. FIG. 4 is a diagram showing a steel plate surface roughness profile.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 角山 浩三 千葉県千葉市川崎町１番地 川崎製鉄株式 会社技術研究本部内 (56)参考文献 特開 昭50−53260（ＪＰ，Ａ) ＴＥＣＮＩＣ ＩＮＦＯ −Ｔｅｃｈｎ ｉｃａｌ ｎｅｗｓ ａｎｄ ｄａｔａ− （1984）Ｃｏｃｋｅｒｉｌｌ Ｓａｍｂ ｒｅ （ベルギー），Ｐ．29−34 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kozo Kadoyama, 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Technical Research Division (56) References JP-A-50-53260 (JP, A) TECNIC INFO-Techn ical news and data- (1984) Cockerill Sambre (Belgium), P. 29-34
Claims (1)
ニッケルめっき、施釉及び焼成の各工程からなる処理を
経てほうろう鋼板を製造するに当り、 前記調質圧延工程において、下記式で示される鋼板表面
粗度の規則性を表わす規則度パラメータＳ値が少なくと
も一方向について０＜Ｓ≦0.25を示し、平均表面粗度Ra
（μｍ）と平均谷間隔Lmv（μｍ）との積；Ra×Lmvが２
〜100μm2を示す表面粗度の鋼板を調整することを特徴
とするプレス成形性およびほうろう密着性に優れたほう
ろう鋼板の製造方法。 ここでｘｉ：鋼板表面凸部ピーク間の距離（μｍ）1. Cold rolling, annealing, temper rolling, degreasing, pickling,
In producing an enameled steel sheet through a treatment consisting of nickel plating, glaze and firing steps, in the temper rolling step, at least a regularity parameter S value representing the regularity of the steel sheet surface roughness represented by the following formula is at least 0 <S ≤ 0.25 in one direction and average surface roughness Ra
(Μm) and average valley interval Lmv (μm); Ra × Lmv is 2
A method for producing an enameled steel sheet having excellent press formability and enamel adhesiveness, which comprises adjusting a steel sheet having a surface roughness of ˜100 μm 2 . Where x i is the distance between the peaks of the convex portions of the steel sheet surface (μm)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61287641A JPH0668155B2 (en) | 1986-12-04 | 1986-12-04 | Method for producing enameled steel sheet with excellent press formability and enamel adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61287641A JPH0668155B2 (en) | 1986-12-04 | 1986-12-04 | Method for producing enameled steel sheet with excellent press formability and enamel adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63143272A JPS63143272A (en) | 1988-06-15 |
| JPH0668155B2 true JPH0668155B2 (en) | 1994-08-31 |
Family
ID=17719855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61287641A Expired - Lifetime JPH0668155B2 (en) | 1986-12-04 | 1986-12-04 | Method for producing enameled steel sheet with excellent press formability and enamel adhesion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0668155B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2500215B2 (en) * | 1992-01-08 | 1996-05-29 | 川崎製鉄株式会社 | Thin steel sheet for enamel with good press wrinkle resistance |
| KR100509618B1 (en) * | 2000-12-16 | 2005-08-24 | 주식회사 포스코 | cool enamel steel plate manufacture method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5053260A (en) * | 1973-09-12 | 1975-05-12 |
-
1986
- 1986-12-04 JP JP61287641A patent/JPH0668155B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| ＴＥＣＮＩＣＩＮＦＯ−Ｔｅｃｈｎｉｃａｌｎｅｗｓａｎｄｄａｔａ−（１９８４）ＣｏｃｋｅｒｉｌｌＳａｍｂｒｅ（ベルギー），Ｐ．２９−３４ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63143272A (en) | 1988-06-15 |
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