JPH0739003B2 - Manufacturing method of stainless pretreated steel strip for cold rolling - Google Patents
Manufacturing method of stainless pretreated steel strip for cold rollingInfo
- Publication number
- JPH0739003B2 JPH0739003B2 JP10470089A JP10470089A JPH0739003B2 JP H0739003 B2 JPH0739003 B2 JP H0739003B2 JP 10470089 A JP10470089 A JP 10470089A JP 10470089 A JP10470089 A JP 10470089A JP H0739003 B2 JPH0739003 B2 JP H0739003B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- steel strip
- cold
- stainless
- cold rolling
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/227—Surface roughening or texturing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、優れた表面光沢を有するステンレス冷延鋼帯
を有利に生産し得る冷間圧延用ステンレス鋼帯の予備処
理に関する。TECHNICAL FIELD The present invention relates to a pretreatment of a stainless steel strip for cold rolling, which can advantageously produce a stainless cold-rolled steel strip having excellent surface gloss.
［従来の技術］ 従来、ステンレス冷延鋼帯は、熱延鋼帯を焼鈍酸洗し、
酸洗された表面のまま、ワークロール径150mmφ以下の
ゼンジミアミル等において大量の圧延油を供給した冷間
圧延を施した後、仕上焼鈍酸洗又は仕上光輝焼鈍し、圧
下率1.2％以下の仕上調質圧延を施して製造していた。[Prior Art] Conventionally, cold-rolled stainless steel strips are produced by annealing hot-rolled steel strips by annealing.
After the pickled surface is cold-rolled with a large amount of rolling oil in a work roll diameter of 150 mmφ or less with a Sendzimir mill, etc., finish annealing, pickling or bright annealing is performed, and a finish reduction of 1.2% or less is achieved. It was manufactured by quality rolling.
これら工程を経て製造されたステンレス冷延鋼帯は、例
えば、SUS430に代表されるフェライト系の場合、製造後
の表面のまま使用される場合が多く、仕上調質圧延後の
製品に優れた表面光沢が要求される。又、SUS304に代表
されるオーステナイト系の場合、仕上調質圧延後にバフ
研磨を施す場合が多く、このバフ研磨後に優れた表面光
沢を呈することが重要である。The stainless cold-rolled steel strip manufactured through these steps, for example, in the case of ferritic typified by SUS430, it is often used as it is after the production, and the surface after finishing temper rolling is excellent. Luster is required. Further, in the case of an austenitic type typified by SUS304, buffing is often performed after finish temper rolling, and it is important to exhibit excellent surface gloss after this buffing.
そこで、従来、ゼンジミアミル等の小径ワークロールを
用いる冷間圧延において、例えば、特公昭57−13362号
公報に示されるロール粗さを工夫する方法等が採られて
いた。然し、この方法を用いても、熱延後、冷間圧延前
に焼鈍酸洗した鋼帯表面の著しく大きい粗さが、冷間圧
延後まで残留する結果、表面光沢は満足できるものでは
なかった。Therefore, conventionally, in cold rolling using a small-diameter work roll such as a Sendzimir mill, for example, a method of devising roll roughness disclosed in JP-B-57-13362 has been adopted. However, even if this method was used, the significantly large roughness of the steel strip surface annealed and pickled after hot rolling and before cold rolling remained as a result until after cold rolling, resulting in unsatisfactory surface gloss. .
又、一方、圧延時間を大幅に短縮して高能率にステンレ
ス冷延鋼帯を製造するものとして、150mmφ以上の大径
ワークロールで冷間圧延する方法が採られている。然
し、大径ワークロールで冷間圧延した鋼帯の表面粗さは
前述の通り熱延鋼帯を焼鈍酸洗した表面の著しく大きい
粗さが冷間圧延後に残留し、然も、小径ワークロールを
用いる冷間圧延に比べて更に大きい粗さとして残留する
ため、その製品は、表面光沢を要求される用途には全く
適用できなかった。On the other hand, a method of cold rolling with a work roll having a large diameter of 150 mmφ or more is adopted as a method for manufacturing a stainless cold-rolled steel strip with a high efficiency by significantly shortening the rolling time. However, the surface roughness of the steel strip cold-rolled with a large-diameter work roll is as mentioned above, the remarkably large roughness of the annealed and pickled surface of the hot-rolled steel strip remains after cold-rolling, and the small-diameter work roll is still used. The product could not be applied at all to applications requiring surface gloss, because the roughness remained higher than that of the cold rolling using.
そこで、この種の表面光沢低下問題を解決する方法とし
て、従来、例えば、特開昭61−49701号公報等のワーク
ロール径の組み合わせを工夫する方法が開示されてい
る。これは、ゴールドダストと称する疵を防止する方法
であり、表面光沢そのものを向上する本出願とは目的を
異にするものであるが、この方法を採用した場合、前述
の特公昭57−13362号公報に記載の技術と同様に、熱延
後に焼鈍酸洗した鋼帯の表面の著しく大きい粗さが冷間
圧延後に残留し、製品の表面光沢は不充分であって、更
に改良を必要としていた。Therefore, as a method for solving this type of surface gloss reduction problem, conventionally, for example, a method of devising a combination of work roll diameters has been disclosed in JP-A-61-49701. This is a method for preventing defects called gold dust, which has a purpose different from that of the present application for improving the surface gloss itself. However, when this method is adopted, the aforementioned Japanese Patent Publication No. 57-13362 is used. Similar to the technique described in the publication, remarkably large roughness of the surface of the steel strip annealed and pickled after hot rolling remained after cold rolling, the surface gloss of the product was insufficient, and further improvement was required. .
［発明が解決しようとする課題］ 本発明は、ゼンジミアミル等の小径ワークロールを用い
る圧延、冷間タンデムミル等の大径ワークロールを用い
る圧延及びこれらを組み合わせた冷間圧延において、従
来からかかえていた表面光沢低下問題を解決することを
目的とする。[Problems to be Solved by the Invention] The present invention has hitherto been involved in rolling using a small diameter work roll such as a Sendzimir mill, rolling using a large diameter work roll such as a cold tandem mill, and cold rolling combining these. The purpose is to solve the problem of reduced surface gloss.
［課題を解決するための手段］ 本発明は、前述の問題を解決し、優れた表面光沢を有す
るステンレス冷延鋼帯を製造するため、冷間圧延に先立
ってステンレス鋼帯を予備処理する方法を提供するもの
である。[Means for Solving the Problems] The present invention solves the above-mentioned problems, and in order to produce a stainless cold-rolled steel strip having excellent surface gloss, a method of pretreating a stainless steel strip prior to cold rolling. Is provided.
即ち、本発明は、熱間圧延終了後のステンレス鋼帯に焼
鈍した後、表面性状調整処理を施して、鋼帯表面粗さを
平均粗さRa2μｍ以下とした後、更にロール表面に厚み
１μｍ以下の液体潤滑剤を塗布し、５％を超える圧下率
のもとで圧延するようにしたものである。That is, the present invention anneals the stainless steel strip after hot rolling and then performs a surface texture adjustment treatment to reduce the steel strip surface roughness to an average roughness Ra of 2 μm or less, and further to a roll surface of a thickness of 1 μm or less. The above liquid lubricant is applied and rolling is performed under a rolling reduction of more than 5%.
［作用］ 以下、本発明について詳細に説明する。[Operation] Hereinafter, the present invention will be described in detail.
従来、ステンレス冷延鋼帯の表面光沢を良好にするに
は、その製品の表面粗さを左右する冷間圧延後の鋼帯の
表面粗さを低減すると良いことが知られていた。It has been conventionally known that in order to improve the surface gloss of a cold rolled stainless steel strip, it is preferable to reduce the surface roughness of the steel strip after cold rolling that affects the surface roughness of the product.
然しながら、本発明者らの検討において、上述の冷間圧
延後の鋼帯の表面粗さは、冷間圧延前の鋼帯、即ち、熱
延後に焼鈍酸洗した鋼帯の表面粗さの一部が冷間圧延後
に残存するものであることを見い出した。However, in the study by the present inventors, the surface roughness of the steel strip after cold rolling described above is one of the surface roughness of the steel strip before cold rolling, that is, the surface roughness of the steel strip annealed and pickled after hot rolling. It has been found that the part remains after cold rolling.
そこで、熱延後に焼鈍酸洗した鋼帯の表面粗さの影響に
ついて、以下に説明する。最終仕上製品で平均粗さRa0.
1μｍ以下の表面粗さを得ることを目標とするステンレ
ス冷延鋼帯の製造において、熱延鋼帯を焼鈍酸洗した直
後の鋼帯表面粗さは、酸洗時のショットブラスト等の機
械的脱スケール処理及び硫酸等の酸により、平均粗さRa
2〜４μｍと著しく大きな粗さを有している。Therefore, the influence of the surface roughness of the steel strip annealed and pickled after hot rolling will be described below. The average roughness Ra0 in the final finished product.
In the production of cold-rolled stainless steel strips with the goal of obtaining a surface roughness of 1 μm or less, the surface roughness of the steel strip immediately after annealing and pickling the hot-rolled steel strip is the mechanical strength such as shot blasting during pickling. Descaling treatment and acid such as sulfuric acid, mean roughness Ra
It has a remarkably large roughness of 2 to 4 μm.
ところで、一般に、冷間圧延時には圧延機入側より大量
に圧延油がロールバイトに供給される。これは、鋼帯表
面及びロール表面に対し、圧延油による潤滑と冷却を同
時に実施して、ヒートストリーク等の焼付き疵発生を防
止し、安定して鋼帯を製造するために行なわれる。従っ
て、冷間圧延の入側において、鋼帯表面に数μｍ厚み以
上の大量の圧延油が付着し、熱延後の焼鈍酸洗により上
述の如くに生じている鋼帯表面の著しく大きい粗さの凹
みに油が充満しロールバイトにかみ込まれる。この凹み
に充満した油は、ロールバイトの中でロールと鋼帯が接
触している間、逃げ場がなくなり封じ込められたまま圧
延されることになる。By the way, generally, during cold rolling, a large amount of rolling oil is supplied to the roll bite from the entrance side of the rolling mill. This is carried out in order to prevent the occurrence of seizure flaws such as heat streaks and to stably manufacture the steel strip by simultaneously performing lubrication and cooling with rolling oil on the steel strip surface and the roll surface. Therefore, on the entry side of cold rolling, a large amount of rolling oil having a thickness of several μm or more adheres to the surface of the steel strip, and as a result of the annealing pickling after hot rolling, the steel strip surface has a significantly large roughness. The recess is filled with oil and bites into the roll bite. The oil filled in the dents is rolled while it is contained and there is no escape while the roll and the steel strip are in contact with each other in the roll bite.
一般に、圧延油を含めた液体は、空気等の気体に比較し
て著しく圧縮され難いので、圧延中に油を充満した凹み
は、圧延前よりいくらか小さくなるが、大部分が圧延後
も残留する。In general, liquids including rolling oil are significantly less likely to be compressed than gases such as air, so the pits filled with oil during rolling will be somewhat smaller than before rolling, but most will remain after rolling. .
以上により、冷間圧延前の鋼帯の表面粗さが、冷間圧延
後も残留し、製品の表面光沢を著しく損なうわけであ
る。As described above, the surface roughness of the steel strip before cold rolling remains even after cold rolling, and the surface gloss of the product is significantly impaired.
従って、表面光沢の良好な鋼帯を得るためには、予め、
冷間圧延前の鋼帯表面の凹凸を小さくすると良いことが
理解される。Therefore, in order to obtain a steel strip with good surface gloss,
It is understood that it is better to reduce the unevenness on the surface of the steel strip before cold rolling.
即ち、上述の知見より、圧延油等の液体を用いない無潤
滑圧延を、冷間圧延前の鋼帯に施すと良いのである。That is, based on the above-mentioned findings, it is better to perform unlubricated rolling without using a liquid such as rolling oil on the steel strip before cold rolling.
ところが、無潤滑圧延を施すとロールと鋼帯が焼付いて
摩擦係数が著しく大きくなり、圧延荷重が著しく大きく
なり、又、同時に、鋼帯表面の凹凸を充分低減させるの
に必要な圧下率が採れない場合が生じた。However, when non-lubricated rolling is applied, the roll and the steel strip are seized, the friction coefficient is significantly increased, the rolling load is significantly increased, and at the same time, the reduction ratio necessary to sufficiently reduce the irregularities on the surface of the steel strip can be obtained. There were cases where there was no.
そこで、本発明者らは、以下の２点を同時に両立させる
ステンレス鋼帯の予備処理方法を検討した。Therefore, the present inventors have examined a pretreatment method for a stainless steel strip that simultaneously satisfies the following two points.
（１）予備処理圧延時に、ロールと鋼帯が焼付かないこ
と。(1) Pretreatment Roll and steel strip should not be seized during rolling.
（２）熱延鋼帯を焼鈍酸洗した後の鋼帯表面の凹凸を冷
間圧延後に残留させない程度に、予備処理可能なこと。(2) Preliminary treatment should be possible to the extent that unevenness on the surface of the steel strip after annealing and pickling the hot-rolled steel strip does not remain after cold rolling.
その結果、以下の方法があることが認められた。As a result, the following methods were recognized.
（Ａ） ロール表面にごく薄い液体の膜を形成させ潤滑
する方法。(A) A method in which a very thin liquid film is formed on the roll surface and lubricated.
（Ｂ） 表面処理したロールで無潤滑圧延する方法。(B) A method of performing non-lubricating rolling with a surface-treated roll.
ここで、上記（Ｂ）のロールの表面処理活用方法は、従
来知られている表面処理を種々試みたが、無垢ロールに
比べて焼付防止効果を有するものの未だ不充分である。Here, as the method of utilizing the surface treatment of the roll of (B), various conventionally known surface treatments have been tried, but they have a seizure preventing effect as compared with the solid roll, but they are still insufficient.
これに比べて上記（Ａ）の薄膜潤滑方法は、液体の膜が
薄いにもかかわらず、焼付防止効果が著しく大きい。
又、液体の膜厚を薄くするほど、熱延後に焼鈍酸洗した
鋼帯の表面凹凸を充分低減できる。本発明者らの検討で
は、ロール表面の膜厚を１μｍ以下にすると大部分の前
記表面凹凸を消去でき、然も、膜厚0.5μｍ以下にする
と更に良いこと、又反面、膜厚が１μｍを超えると凹凸
が多量に残留し、その後の冷間圧延においても消去でき
ないことを把握した。On the other hand, the thin film lubrication method (A) has a significantly large seizure prevention effect despite the thin liquid film.
Further, the thinner the liquid film is, the more the surface irregularities of the steel strip annealed and pickled after hot rolling can be sufficiently reduced. According to the study by the present inventors, if the film thickness on the roll surface is 1 μm or less, most of the surface irregularities can be eliminated, and it is better if the film thickness is 0.5 μm or less. It was understood that a large amount of unevenness remained when it exceeded, and it could not be erased even in the subsequent cold rolling.
尚、液体潤滑剤として、水、スキンパス油、圧延油、圧
延油エマルション等何れも焼付防止効果、表面凹凸低減
効果を有するが、望ましくは１〜15cSt程度の粘度を有
する液体潤滑剤が良い。As the liquid lubricant, any of water, skin pass oil, rolling oil, rolling oil emulsion and the like has a seizure prevention effect and a surface unevenness reducing effect, but a liquid lubricant having a viscosity of about 1 to 15 cSt is desirable.
ここで、予備処理圧延時に５％を超える圧下率が必要な
理由は以下の通りである。Here, the reason why the rolling reduction of more than 5% is required in the pretreatment rolling is as follows.
本発明者らの検討において、予備処理圧延時にその圧下
率を種々変更して、熱延後に焼鈍酸洗した鋼帯を通板
し、その後、冷間圧延、仕上焼鈍酸洗又は仕上光輝焼
鈍、及び、仕上調質圧延を施して仕上げたステンレス冷
延鋼帯の表面光沢を調査した。In the study of the present inventors, by varying the reduction ratio during pretreatment rolling, the steel strip is annealed and pickled after hot rolling, and then passed through cold rolling, finish annealing pickling or finish bright annealing, Also, the surface gloss of the stainless cold-rolled steel strip finished by finishing temper rolling was investigated.
その結果、ゼンジミアミル等の小径ワークロールを用い
た圧延、冷間タンデムミル等の大径ワークロールを用い
た圧延、及び、これらを組み合わせた冷間圧延何れの場
合においても、予備処理圧延時の圧下率を変化させる
と、圧下率５％以下では表面光沢は殆ど改善されない
が、５％を超えると著しく良好となる。As a result, rolling using a small-diameter work roll such as a Sendzimir mill, rolling using a large-diameter work roll such as a cold tandem mill, and in any case of cold rolling combining these, reduction in pretreatment rolling When the reduction ratio is changed, the surface gloss is hardly improved when the rolling reduction is 5% or less, but it becomes remarkably good when the rolling reduction exceeds 5%.
ここで、更に鋼帯の表面光沢を向上する方法を検討し
た。Here, a method for further improving the surface gloss of the steel strip was examined.
本発明の５％を超える圧下率のもとで、厚み１μｍ以下
の液体潤滑剤をロール表面に塗布したまま予備処理圧延
する方法において、予備処理圧延入側の鋼帯、即ち、熱
延鋼帯を焼鈍し、メカニカル脱スケール及び酸洗等の表
面性状調整処理を施した後の鋼帯の表面粗さは、予備処
理圧延出側の鋼帯の表面粗さに影響を及ぼし、例えば、
表面性調整処理後の鋼帯の表面粗さが小さいほど、予備
処理圧延後の鋼帯の表面粗さは小さくなる。その結果、
厚み１μｍ以下の液体潤滑剤をロール表面に塗布する予
処理圧延を施したステンレス鋼帯を、その後、圧延油を
大量に供給する冷間圧延を施して仕上焼鈍酸洗及び仕上
調質圧延した場合、その冷延鋼帯は、表面光沢がさらに
向上することを見い出した。In the method of pretreatment rolling with a liquid lubricant having a thickness of 1 μm or less applied to the roll surface under a rolling reduction of more than 5% according to the present invention, a steel strip on the inlet side of the pretreatment rolling, that is, a hot rolled steel strip. Annealing, the surface roughness of the steel strip after subjected to a surface property adjustment treatment such as mechanical descaling and pickling, affects the surface roughness of the steel strip on the pretreatment rolling exit side, for example,
The smaller the surface roughness of the steel strip after the surface property adjusting treatment, the smaller the surface roughness of the steel strip after the pretreatment rolling. as a result,
When a stainless steel strip that has been pretreated and rolled with a liquid lubricant having a thickness of 1 μm or less applied to the roll surface is then cold-rolled by supplying a large amount of rolling oil to finish annealing pickling and finish temper rolling. , Found that the cold-rolled steel strip has further improved surface gloss.
そこで、熱延鋼帯を焼鈍し、メカニカル脱スケール及び
酸洗等の表面性状調整処理を施した後の鋼帯の表面粗さ
を種々変えて、本発明の予備処理圧延を施し、その後、
圧延油を大量に供給する冷間圧延、仕上焼鈍酸洗及び仕
上調質圧延した後、そのステンレス冷延鋼帯の表面光沢
を調査した。Therefore, annealing the hot rolled steel strip, variously changing the surface roughness of the steel strip after subjected to the surface property adjustment treatment such as mechanical descaling and pickling, subjected to the pretreatment rolling of the present invention, then,
After cold rolling supplying a large amount of rolling oil, finish annealing pickling and finish temper rolling, the surface gloss of the stainless cold rolled steel strip was investigated.
その結果、従来平均粗さRaが２〜４μｍと著しく粗さの
大きかった表面性状調整処理後の鋼帯表面粗さを、平均
粗さRa2μｍ以下とすることにより、ステンレス冷延鋼
帯の表面光沢が著しく向上することを見い出した。As a result, the surface roughness of the stainless steel cold rolled steel strip was reduced by setting the average surface roughness Ra2μm or less after the steel strip surface roughness after the surface texture adjustment treatment, which had a significantly large average roughness Ra of 2 to 4 μm. Have been found to be significantly improved.
尚、ここで、鋼帯の表面性状調整処理方法としては、酸
洗のみによるものの他、メカニカル脱スケールとしてシ
ョットブラスト、液体ホーニング、テンションレベラ
ー、ブラシ等の機械処理によるもの、或いはペースト電
解等の化学処理によるもの等を広く用いることができ
る。Here, as the surface property adjusting method of the steel strip, other than only pickling, mechanical descaling such as shot blasting, liquid honing, tension leveler, mechanical treatment such as brush, or chemical such as paste electrolysis. A wide variety of materials can be used depending on the treatment.
［実施例］ 本発明方法に従って、熱延後に焼鈍酸洗し、更に表面粗
さを平均粗さRa2μｍ以下としたフェライト系ステンレ
ス鋼の例としてSUS430鋼帯、及び、オーステナイト系ス
テンレス鋼の例としてのSUS304鋼帯を、第１表〜第３表
に例として示す圧下率のもと、液体潤滑剤としてはスキ
ンパス圧延油を供給して予備処理圧延した。又、本発明
の比較例として、上述の表面粗さRaが２μｍを超える場
合についても実施した。その後、冷間圧延を実施し、仕
上焼鈍酸洗又は仕上光輝焼鈍して、各々仕上調質圧延し
た。尚、SUS304の仕上焼鈍酸洗を施した鋼帯は、仕上調
質圧延後、更にバフ研磨を同一条件で施した。Example According to the method of the present invention, SUS430 steel strip as an example of a ferritic stainless steel that has been subjected to annealing pickling after hot rolling and having a surface roughness of Ra 2 μm or less, and an example of an austenitic stainless steel The SUS304 steel strip was pretreated and rolled under the reduction ratios shown in Tables 1 to 3 as examples, by supplying skin-pass rolling oil as the liquid lubricant. Further, as a comparative example of the present invention, the case where the above-mentioned surface roughness Ra exceeds 2 μm was also carried out. After that, cold rolling was performed, finish annealing pickling or finish bright annealing, and finish temper rolling, respectively. The steel strip that had been subjected to finish annealing pickling of SUS304 was subjected to finish temper rolling and then subjected to buff polishing under the same conditions.
尚、第１表は、冷間タンデムミルによる大径ワークロー
ルを用いる冷間圧延の場合、第２表は、ゼンジミアミル
による小径ワークロールを用いる冷間圧延の場合、第３
表は、冷間タンデムミルによる圧延後にゼンジミアミル
で冷間圧延した場合を示す。Table 1 shows the case of cold rolling using a large diameter work roll by a cold tandem mill, and Table 2 shows the case of cold rolling using a small diameter work roll by a Sendzimir mill.
The table shows the case where cold rolling was carried out by the Sendzimir mill after rolling by the cold tandem mill.
これらステンレス冷延鋼帯の表面光沢について、その目
視判定を第１表〜第３表に併せて示した。尚、目視判定
は、光沢の良好な順に特Ａ及びＡ〜Ｄの５段階とした。
目視判定による光沢をJIS−Z8741光沢度測定方法５（GS
20゜）によって定量化したところ、特Ａは光沢度950以
上、Ａは光沢度800〜950、Ｂは600〜800、Ｃは400〜60
0、Ｄは400以下に相当する。Regarding the surface gloss of these stainless cold-rolled steel strips, the visual judgments thereof are also shown in Tables 1 to 3. In addition, the visual judgment was made into 5 grades of special A and A to D in order of good gloss.
The gloss by visual judgment is JIS-Z8741 gloss measurement method 5 (GS
When quantified by 20 °), special A has a gloss of 950 or more, A has a gloss of 800 to 950, B has 600 to 800, and C has 400 to 60.
0 and D correspond to 400 or less.
又、従来の製造方法で得られたステンレス冷延鋼帯、及
び、比較例として、表面性状調整処理を施して平均粗さ
Raを２μｍ以下とし、その後、予備処理圧延時に、従来
の冷間圧延と同じく厚み１μｍを超える状態で液体潤滑
剤を供給する方法で得られたステンレス冷延鋼帯の表面
光沢の目視判定結果も併せて示した。Also, a stainless cold-rolled steel strip obtained by a conventional manufacturing method, and as a comparative example, a surface texture adjustment treatment is performed to obtain an average roughness.
Ra was set to 2 μm or less, and then, at the time of pretreatment rolling, the visual judgment result of the surface gloss of the stainless cold-rolled steel strip obtained by the method in which the liquid lubricant was supplied in the state where the thickness exceeded 1 μm as in the conventional cold rolling. It is also shown.
フェライト系SUS430鋼帯及びオーステナイト系SUS304鋼
帯のいずれの場合も、第１表〜第３表に示す冷間タンデ
ムミル等の大径ワークロールを用いる圧延、ゼンジミア
ミル等の小径ワークロールを用いる圧延、及びこれらを
組み合わせた圧延各々において、本発明方法により予備
処理を施して製造したステンレス冷延鋼帯は、従来方法
で製造した鋼帯に比べて著しく良好な表面光沢を有して
おり、本発明方法は表面光沢向上に著しく有効であるこ
とが明らかである。In both cases of ferritic SUS430 steel strip and austenitic SUS304 steel strip, rolling using large diameter work rolls such as cold tandem mills shown in Tables 1 to 3, rolling using small diameter work rolls such as Sendzimir mill, And, in each of the rollings in which these are combined, the stainless cold-rolled steel strip produced by pretreatment by the method of the present invention has remarkably good surface gloss as compared with the steel strip produced by the conventional method. It is clear that the method is remarkably effective in improving the surface gloss.
［発明の効果］ 以上の通り、本発明方法により予備処理して製造したス
テンレス冷延鋼帯は、従来の方法により製造したステン
レス冷延鋼帯に比べ、著しく優れた表面光沢を有する。
特に、冷間タンデムミル等の大径ワークロールを用いた
圧延の場合、従来全く到達不可能であったゼンジミアミ
ル等を用いた製品と同等以上の優れた表面光沢が得ら
れ、大量生産向きのタンデムミルを利用して能率良く、
かつ、品質の良い製品を供給できる。[Effects of the Invention] As described above, the stainless cold-rolled steel strip produced by pretreatment by the method of the present invention has remarkably excellent surface gloss as compared with the stainless cold-rolled steel strip produced by the conventional method.
In particular, in the case of rolling using a large diameter work roll such as a cold tandem mill, a tandem suitable for mass production can be obtained with a surface gloss that is equal to or better than that of a product using a Sendzimir mill, which was previously unattainable. Use the mill efficiently
And we can supply high quality products.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小松 富夫 千葉県千葉市川崎町１番地 川崎製鉄株式 会社千葉製鉄所内 (72)発明者 岸田 朗 千葉県千葉市川崎町１番地 川崎製鉄株式 会社千葉製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tomio Komatsu, 1 Kawasaki-cho, Chiba-shi, Chiba, Chiba Steel Works, Ltd. (72) Akira Kishida 1 Kawasaki-cho, Chiba, Chiba Kawasaki, Chiba In-house
Claims (1)
た後、表面性状調整処理を施して、鋼帯表面粗さを平均
粗さRa2μｍ以下とした後、更にロール表面に厚み１μ
ｍ以下の液体潤滑剤を塗布し、５％を超える圧下率のも
とで圧延することを特徴とする冷間圧延用ステンレス予
備処理鋼帯の製造方法。1. A stainless steel strip after hot rolling is annealed, and then subjected to a surface texture adjustment treatment to reduce the surface roughness of the steel strip to an average roughness Ra of 2 μm or less, and further to a roll surface thickness of 1 μm.
A method for producing a stainless pretreated steel strip for cold rolling, which comprises applying a liquid lubricant of m or less and rolling under a rolling reduction of more than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10470089A JPH0739003B2 (en) | 1989-04-26 | 1989-04-26 | Manufacturing method of stainless pretreated steel strip for cold rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10470089A JPH0739003B2 (en) | 1989-04-26 | 1989-04-26 | Manufacturing method of stainless pretreated steel strip for cold rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02284704A JPH02284704A (en) | 1990-11-22 |
| JPH0739003B2 true JPH0739003B2 (en) | 1995-05-01 |
Family
ID=14387758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10470089A Expired - Lifetime JPH0739003B2 (en) | 1989-04-26 | 1989-04-26 | Manufacturing method of stainless pretreated steel strip for cold rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739003B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713653A (en) * | 2022-03-24 | 2022-07-08 | 上海工程技术大学 | Machining method and forming die assembly for long rod part with threaded teeth for vehicle |
-
1989
- 1989-04-26 JP JP10470089A patent/JPH0739003B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02284704A (en) | 1990-11-22 |
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