JP2003266117A - Method for removing hot-rolling scale by brushing - Google Patents
Method for removing hot-rolling scale by brushingInfo
- Publication number
- JP2003266117A JP2003266117A JP2002068771A JP2002068771A JP2003266117A JP 2003266117 A JP2003266117 A JP 2003266117A JP 2002068771 A JP2002068771 A JP 2002068771A JP 2002068771 A JP2002068771 A JP 2002068771A JP 2003266117 A JP2003266117 A JP 2003266117A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- cooling water
- hot
- rolled
- brushing
- 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.)
- Withdrawn
Links
Landscapes
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、熱延鋼帯のメカニカル
デスケーリングに際し、高圧下圧延で亀裂が導入された
熱延スケールを効率よくブラッシング除去する方法に関
する。
【０００２】
【従来の技術】酸化物を主体とする熱延スケールで表面
が覆われている熱延鋼帯をスケールが付着したまま冷延
等の下工程に送ると、熱延スケールに起因する表面疵や
クラック等の欠陥が発生する原因となる。この種の欠陥
発生は、熱延鋼帯の冷間圧延に先立って熱延スケールを
酸洗除去することにより防止される。また、酸洗設備，
廃酸処理，脱スケール能の調整，酸洗時の水素侵入に起
因する特性劣化等の問題を解消するため、熱延スケール
が付着した熱延鋼帯を高圧下率で冷間圧延する場合もあ
る。
【０００３】本出願人も、熱延鋼帯の高圧下圧延によっ
て熱延スケールを除去し、或いは酸洗負荷を軽減する方
法を開発した。たとえば、特開平９−１６４４１７号公
報で紹介したデスケーリング装置は、熱延スケールが付
着したままの熱延鋼帯１をペイオフリール２から巻き戻
し、ブライドルロール３を経て冷間圧延機４で高圧下圧
延する(図１)。熱延スケールは、高圧下圧延によって亀
裂，粉砕され、熱延鋼帯１から剥離される。鋼帯表面に
残留しているスケール粉砕物を研削ブラシ５で除去した
後、酸洗槽６に熱延鋼帯１が送り込まれる。熱延鋼帯１
は、酸洗槽８で鋼帯表面に残っているスケールが酸洗除
去された後、巻取りリール７に酸洗材として巻き取られ
る。
【０００４】
【発明が解決しようとする課題】研削ブラシ５には砥粒
入りのブラシが使用され、熱延スケールの厚み，ライン
スピード，高圧下圧延条件等に応じて研削負荷を変更す
る。研削負荷の変更には、研削ブラシ５に供給する負荷
電流や研削ブラシ５の回転数を調整する方法がある。と
ころが、研削負荷を大きく変更すると、ブラシの毛折れ
や焼付きが発生することがある。ブラシの毛折れ，焼付
きは冷却水不足が原因であるが、毛折れ，焼付き防止の
ために冷却水量を単に増加させると、熱延鋼帯１の表面
で研削ブラシ５がスリップしやすくなる。その結果、研
削ブラシ５の研削力が低下し、多量の熱延スケールが付
着したままで熱延鋼帯１が酸洗槽６に送り込まれ、メカ
ニカルデスケーリングの長所が損なわれる。
【０００５】
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、研削ブラシの研
削負荷に応じて冷却水量を調整することにより、研削負
荷を変更した場合にあっても冷却水量不足に起因する毛
折れやスリップに起因する研削力不足を防止し、熱延鋼
帯表面から効率よく熱延スケールを除去することを目的
とする。
【０００６】本発明は、その目的を達成するため、高圧
下圧延された熱延鋼帯を研削ブラシでブラッシングする
ことにより熱延スケールを除去する際、研削負荷に対応
する適正冷却水量を演算回路で演算し、研削ブラシに冷
却水を供給する冷却水供給管に設けられている流量調整
弁に適正冷却水量の演算結果をバルブ開度指令として出
力し、研削負荷の変更に応じて調整された適正水量の冷
却水を研削ブラシに供給することを特徴とする。
【０００７】
【実施の形態】研削負荷に応じて冷却水量を調整する手
段として、研削ブラシ５に冷却水量調整機構１０を付設
している（図２）。冷却水量調整機構１０は、研削負荷
を設定する演算回路１２を備えている。演算回路１２
は、走行中の熱延鋼帯１に関する鋼種，スケール厚み等
の情報が上位コンピュータから入力されており、現在の
ラインスピードからブラッシングセクションでのスケー
ル持込み量を演算し、演算結果に基づいて研削ブラシ５
の研削負荷を設定する。
【０００８】演算回路１２には、更に研削負荷に応じた
適正冷却水量の関係（図３）が予め入力されており、設
定された研削負荷に対応する適正冷却水量を算出し、算
出結果をバルブ開度指令s1として流量調整弁１３に出力
する。なお、研削負荷−適正冷却水量の関係は、過去の
実績値，熱収支計算等から求められた関係が使用され
る。冷却水はタンク１４→ポンプ１５→冷却水供給管１
６→研削ブラシ５→ブラッシングチャンバ１７→タンク
１４を循環しており、該冷却水循環経路の冷却水供給管
１６に流量調整弁１３が組み込まれている。流量調整弁
１３の開度がバルブ開度指令ｓ1に従って調整されてい
るので、ポンプ１５でタンク１４から汲み出された冷却
水が冷却水供給管１６を通過する流量が規制され、研削
負荷に応じた適正水量で研削ブラシ５に冷却水が供給さ
れる。
【０００９】研削負荷を増加させると、研削による発熱
量が増加して研削ブラシ５が温度上昇し毛折れ，焼付き
等の異常が発生する虞が強くなる。逆に研削負荷を低減
すると、結果として冷却水が過剰に研削ブラシ５に供給
されることになり、熱延鋼帯１の表面で研削ブラシ５が
スリップすることによる研削不良や熱延鋼帯１，研削ブ
ラシ５から冷却水を除去することに研削電流が無駄に消
費されることになる。研削負荷の変化は、研削ブラシ５
を駆動するモータ１１の回転数ｓ2を演算回路１２に入
力し、モータ回転数ｓ2の変化を算出することにより知
ることができる。或いは、モータ回転数ｓ1だけでな
く、モータ１１への供給電流や熱延鋼帯１に対する研削
ブラシ５の押圧力，研削ブラシ５の温度等の演算因子か
らも研削負荷の変化及び変化後の研削負荷を演算でき
る。以下、これらの演算因子を含む意味でモータ回転数
ｓ2を使用する。
【００１０】演算された変更後の研削負荷は研削負荷−
適正冷却水量の関係（図３）に当てはめられ、変更後の
研削負荷に対応する適正冷却水量を改めて設定する。こ
の適正冷却水量に対応するバルブ開度指令ｓ1を演算回
路１２から流量調整弁１３に出力し、冷却水供給管１６
を流れる冷却水の流量を変更後の研削負荷に対応する適
正量に変更する。このようにして、現在の研削負荷に対
応する適正流量の冷却水が研削ブラシ５に供給されるた
め、研削負荷を変更した場合にあっても研削ブラシ５に
毛折れ，焼付き等の異常が発生することなく、また研削
ブラシ５のスリップに起因した研削力の低下もなく、安
定条件下で熱延鋼帯１がブラッシングされる。したがっ
て、ブラッシングチャンバ１７を出た熱延鋼帯１の表面
に残存する熱延スケールが定常化し、酸洗後に品質が安
定した酸洗材が得られる。更には、冷却水を無駄に消費
することがなく、冷却水の除去に消費される電力の割合
も減少する。
【００１１】
【実施例】平均厚み１０μｍの熱延スケールが付着して
いる板厚３ｍｍの熱延鋼帯を冷間圧延機４に送り、圧下
率４０％で高圧下圧延した後、ナイロンにＳｉＣ（砥
粒）を混入した研削ブラシ５でブラッシングした。この
場合、ブラッシング条件をラインスピード１００ｍ／
分，回転数１０００ｒｐｍ，供給電流１５０Ａ，切り込
み量３ｍｍ，冷却水供給量１００リットル／分に設定し
たところ、ブラッシングされた熱延鋼帯１の表面に約５
０％の熱延スケールが残存していた。
【００１２】ラインスピード２００ｍ／分で同等の研削
量を得るため研削電流を１７０Ａに増加したところ、研
削ブラシ５の毛折れ，焼付き等の異常が散見された。逆
にラインスピード３０ｍ／分で研削電流を１３０Ａに下
げたところ、板幅中央付近の熱延スケールが全く取れな
くなった。そこで、ラインスピードの変更に伴って研削
ブラシ５に供給する冷却水量を変更した。ラインスピー
ド２００ｍ／分のとき研削電流を１７０Ａに上げると共
に当該研削量に対応するバルブ開度指令ｓ1を演算回路
１２から流量調整弁１３に出力し、適正冷却水量１２０
リットル／分の冷却水を研削ブラシ５に供給した。他
方、研削電流１３０Ａでは適正冷却水量８０リットル／
分の冷却水を研削ブラシ５に供給した。
【００１３】研削負荷の変更に応じて適正冷却水量を変
えた何れの場合でも、ブラッシングチャンバ１７を出た
熱延鋼帯１の表面には、研削負荷変更前とほぼ同じ状況
で熱延スケールが残存していた。また、適正冷却水量が
維持されたことから、研削ブラシ５に毛折れや焼付きが
発生することもなく、研削ブラシ５のスリップも検出さ
れなかった。
【００１４】
【発明の効果】以上に説明したように、本発明において
は、研削負荷の変更に対応して調整された適正水量の冷
却水を研削ブラシに供給しながら、熱延鋼帯の表面から
熱延スケールをブラッシング除去している。そのため、
冷却水不足に起因する研削ブラシの毛折れや焼付き等が
なく、また冷却水過剰に起因する研削ブラシのスリップ
もないので、ブラッシング後の熱延スケール残存状況が
定常化し、酸洗後に品質の安定化した酸洗材が得られ
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for efficiently brushing and removing hot-rolled scale in which cracks have been introduced by high-pressure rolling during mechanical descaling of a hot-rolled steel strip. About. [0002] When a hot-rolled steel strip whose surface is covered with a hot-rolled scale mainly composed of an oxide is sent to a lower process such as cold rolling with the scale attached, the strip is caused by the hot-rolled scale. This may cause defects such as surface flaws and cracks. This type of defect generation is prevented by pickling and removing the hot-rolled scale prior to the cold rolling of the hot-rolled steel strip. Also, pickling equipment,
In order to eliminate problems such as waste acid treatment, adjustment of descaling ability, and deterioration of characteristics due to hydrogen penetration during pickling, hot-rolled steel strip with hot-rolled scale may be cold-rolled at a high pressure rate. is there. The present applicant has also developed a method of removing hot-rolled scale by high-pressure rolling of a hot-rolled steel strip or reducing the pickling load. For example, the descaling apparatus introduced in Japanese Patent Application Laid-Open No. 9-164417 rewinds a hot-rolled steel strip 1 with a hot-rolled scale adhered from a pay-off reel 2, passes through a bridle roll 3, and performs a high-pressure Roll down (Fig. 1). The hot-rolled scale is cracked and pulverized by high-pressure rolling, and is separated from the hot-rolled steel strip 1. After the scale pulverized matter remaining on the steel strip surface is removed by the grinding brush 5, the hot-rolled steel strip 1 is sent to the pickling tank 6. Hot rolled steel strip 1
After the scale remaining on the surface of the steel strip is pickled and removed in the pickling tank 8, the scale is wound on the take-up reel 7 as a pickling material. [0004] A brush containing abrasive grains is used as the grinding brush 5, and the grinding load is changed according to the thickness of the hot-rolled scale, line speed, rolling conditions under high pressure, and the like. To change the grinding load, there is a method of adjusting the load current supplied to the grinding brush 5 or the rotation speed of the grinding brush 5. However, if the grinding load is significantly changed, the brush may be broken or seized. The breakage and seizure of the brush are caused by insufficient cooling water. However, if the amount of cooling water is simply increased to prevent the breakage and seizure, the grinding brush 5 is likely to slip on the surface of the hot-rolled steel strip 1. As a result, the grinding force of the grinding brush 5 is reduced, and the hot-rolled steel strip 1 is fed into the pickling tank 6 with a large amount of hot-rolled scale adhered thereto, thereby impairing the advantage of mechanical descaling. SUMMARY OF THE INVENTION The present invention has been devised to solve such a problem, and the grinding load is adjusted by adjusting the amount of cooling water according to the grinding load of the grinding brush. It is an object of the present invention to prevent shortage of grinding force due to breakage and slip due to insufficient amount of cooling water even when changing the amount of cooling water, and to efficiently remove hot-rolled scale from the surface of the hot-rolled steel strip. In order to achieve the object, the present invention provides an arithmetic circuit for calculating an appropriate cooling water amount corresponding to a grinding load when removing a hot-rolled scale by brushing a hot-rolled steel strip rolled under high pressure with a grinding brush. The result of the calculation of the appropriate amount of cooling water is output as a valve opening command to the flow control valve provided in the cooling water supply pipe that supplies the cooling water to the grinding brush, and is adjusted according to the change in the grinding load. It is characterized in that an appropriate amount of cooling water is supplied to the grinding brush. [0007] As means for adjusting the amount of cooling water according to the grinding load, a cooling water amount adjusting mechanism 10 is attached to the grinding brush 5 (Fig. 2). The cooling water amount adjusting mechanism 10 includes an arithmetic circuit 12 for setting a grinding load. Arithmetic circuit 12
In this example, information such as the steel type and scale thickness of the hot-rolled steel strip 1 during traveling is input from a host computer, the amount of scale brought into the brushing section is calculated from the current line speed, and the grinding brush is calculated based on the calculation result. 5
Set the grinding load of The arithmetic circuit 12 is preliminarily input with the relationship of the appropriate cooling water amount according to the grinding load (FIG. 3), calculates the appropriate cooling water amount corresponding to the set grinding load, and outputs the calculation result to the valve. and outputs as the opening degree command s 1 to the flow rate regulating valve 13. As the relationship between the grinding load and the appropriate cooling water amount, a relationship obtained from past actual values, heat balance calculation, or the like is used. Cooling water is tank 14 → pump 15 → cooling water supply pipe 1
6 → the grinding brush 5 → the brushing chamber 17 → the tank 14, and the flow regulating valve 13 is incorporated in the cooling water supply pipe 16 of the cooling water circulation path. Since the opening of the flow rate adjusting valve 13 is adjusted according to a valve opening command s 1, the flow rate of the cooling water is pumped from the tank 14 by the pump 15 passes through the cooling water supply pipe 16 is restricted, the grinding load Cooling water is supplied to the grinding brush 5 with an appropriate amount of water according to the amount. When the grinding load is increased, the amount of heat generated by the grinding increases, and the temperature of the grinding brush 5 rises, and there is a strong possibility that abnormalities such as breakage and seizure may occur. Conversely, when the grinding load is reduced, the cooling water is excessively supplied to the grinding brush 5, and the grinding brush 5 slips on the surface of the hot-rolled steel strip 1, resulting in poor grinding or the hot-rolled steel strip 1. In addition, the removal of the cooling water from the grinding brush 5 wastes the grinding current. The change in the grinding load is determined by the grinding brush 5
Can be obtained by inputting the rotation speed s 2 of the motor 11 for driving the motor to the arithmetic circuit 12 and calculating the change in the motor rotation speed s 2 . Alternatively, not only the motor rotation speed s 1 but also the change of the grinding load and the after-change of the grinding load are calculated not only from the supply current to the motor 11, the pressing force of the grinding brush 5 on the hot-rolled steel strip 1, but also the temperature of the grinding brush 5. The grinding load can be calculated. Hereinafter, using the motor speed s 2 include the meaning of these operations factors. [0010] The calculated grinding load after the change is the grinding load-
This is applied to the relationship of the appropriate cooling water amount (FIG. 3), and the appropriate cooling water amount corresponding to the changed grinding load is set again. The valve opening command s 1 corresponding to the appropriate cooling water amount is output from the arithmetic circuit 12 to the flow control valve 13, and the cooling water supply pipe 16 is
The flow rate of the cooling water flowing through is changed to an appropriate amount corresponding to the changed grinding load. In this way, since the cooling water at an appropriate flow rate corresponding to the current grinding load is supplied to the grinding brush 5, even if the grinding load is changed, abnormalities such as breakage and seizure of the grinding brush 5 will occur. The hot-rolled steel strip 1 is brushed under stable conditions without any occurrence and no reduction in the grinding force due to the slip of the grinding brush 5. Therefore, the hot-rolled scale remaining on the surface of the hot-rolled steel strip 1 that has exited the brushing chamber 17 is stabilized, and a pickling material having stable quality after pickling can be obtained. Further, the cooling water is not wasted, and the ratio of power consumed for removing the cooling water is reduced. EXAMPLE A hot-rolled steel strip having a thickness of 3 mm to which a hot-rolled scale having an average thickness of 10 μm is attached is sent to a cold rolling mill 4 and rolled under high pressure at a rolling reduction of 40%. (Abrasive grains) were brushed with a grinding brush 5 mixed therein. In this case, the brushing conditions were set to a line speed of 100 m /
Minute, rotation speed 1000 rpm, supply current 150 A, depth of cut 3 mm, cooling water supply 100 l / min.
0% of the hot-rolled scale remained. When the grinding current was increased to 170 A to obtain the same amount of grinding at a line speed of 200 m / min, abnormalities such as breakage and seizure of the grinding brush 5 were found. Conversely, when the grinding current was reduced to 130 A at a line speed of 30 m / min, the hot rolled scale near the center of the sheet width could not be obtained at all. Therefore, the amount of cooling water supplied to the grinding brush 5 was changed according to the change in the line speed. When the line speed is 200 m / min, the grinding current is increased to 170 A, and the valve opening command s 1 corresponding to the grinding amount is output from the arithmetic circuit 12 to the flow control valve 13, and the appropriate cooling water amount
Cooling water of 1 liter / min was supplied to the grinding brush 5. On the other hand, when the grinding current is 130 A, the appropriate cooling water amount is 80 liters /
Minutes of cooling water was supplied to the grinding brush 5. In any case where the appropriate amount of cooling water is changed in accordance with the change in the grinding load, the surface of the hot-rolled steel strip 1 that has exited the brushing chamber 17 has the hot-rolled scale in almost the same condition as before the change in the grinding load. It remained. Further, since the appropriate amount of cooling water was maintained, no breakage or seizure occurred in the grinding brush 5, and no slip of the grinding brush 5 was detected. As described above, according to the present invention, while supplying the appropriate amount of cooling water adjusted to the change in the grinding load to the grinding brush, the surface of the hot-rolled steel strip is The hot-rolled scale is removed by brushing. for that reason,
There is no breakage or seizure of the grinding brush due to lack of cooling water, and there is no slip of the grinding brush due to excess cooling water. A cured pickling material is obtained.
【図面の簡単な説明】
【図１】 メカニカルデスケーリングを組み込んだライ
ン
【図２】 研削負荷に応じて適正冷却水量を変更する機
構
【図３】 研削負荷−適正冷却水量の関係を示すグラフ
【符号の説明】
１：熱延鋼帯 ５：研削ブラシ ６：酸洗槽
１０：冷却水量調整機構 １１：モータ １２：演
算回路 １３：流量調整弁 １４：タンク １
５：ポンプ １６：冷却水供給管 １７：ブラッシ
ングチャンバ
ｓ1：バルブ開度指令 ｓ2：モータ回転数（現在の研
削量を表す信号）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 A line incorporating mechanical descaling. FIG. 2 A mechanism for changing an appropriate cooling water amount according to a grinding load. FIG. 3 A graph showing a relationship between a grinding load and an appropriate cooling water amount. DESCRIPTION OF SYMBOLS 1: Hot-rolled steel strip 5: Grinding brush 6: Pickling tank 10: Cooling water amount adjusting mechanism 11: Motor 12: Operation circuit 13: Flow control valve 14: Tank 1
5: Pump 16: cooling water supply pipe 17: brushing chamber s 1: valve opening command s 2: motor speed (signal representing the current grinding amount)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野内 聡 愛媛県東予市北条962−14 日新製鋼株式 会社東予製造所内 (72)発明者 内山 匠 愛媛県東予市北条962−14 日新製鋼株式 会社東予製造所内 Ｆターム(参考） 3C047 FF09 GG19 3C058 AA06 AC04 CB03 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Satoshi Nouchi 962-14 Hojo, Toyo City, Ehime Prefecture Nisshin Steel Co., Ltd. Company Toyo Works (72) Inventor Takumi Uchiyama 962-14 Hojo, Toyo City, Ehime Prefecture Nisshin Steel Co., Ltd. Company Toyo Works F term (reference) 3C047 FF09 GG19 3C058 AA06 AC04 CB03
Claims (1)
でブラッシングすることにより熱延スケールを除去する
際、研削負荷に対応する適正冷却水量を演算回路で演算
し、研削ブラシに冷却水を供給する冷却水供給管に設け
られている流量調整弁に適正冷却水量の演算結果をバル
ブ開度指令として出力し、研削負荷の変更に応じて調整
された適正水量の冷却水を研削ブラシに供給することを
特徴とする熱延スケールのブラッシング除去方法。Claims 1. When removing a hot-rolled scale by brushing a hot-rolled steel strip rolled under high pressure with a grinding brush, an appropriate cooling water amount corresponding to a grinding load is calculated by a calculation circuit. The calculation result of the appropriate cooling water amount is output as a valve opening command to a flow rate adjustment valve provided in a cooling water supply pipe that supplies cooling water to the grinding brush, and the appropriate water amount adjusted according to the change in the grinding load is output. A method for removing brushing of a hot-rolled scale, comprising supplying cooling water to a grinding brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002068771A JP2003266117A (en) | 2002-03-13 | 2002-03-13 | Method for removing hot-rolling scale by brushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002068771A JP2003266117A (en) | 2002-03-13 | 2002-03-13 | Method for removing hot-rolling scale by brushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003266117A true JP2003266117A (en) | 2003-09-24 |
Family
ID=29199791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002068771A Withdrawn JP2003266117A (en) | 2002-03-13 | 2002-03-13 | Method for removing hot-rolling scale by brushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003266117A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1628784A2 (en) | 2003-04-07 | 2006-03-01 | The Material Works Ltd. | Method of removing scale and inhibiting oxidation in processed sheet metal |
| KR101357538B1 (en) | 2012-01-31 | 2014-02-03 | 현대제철 주식회사 | Scale removing apparatus of material front |
| JP2015030055A (en) * | 2013-08-01 | 2015-02-16 | 株式会社ディスコ | Grinder |
| CN105598189A (en) * | 2015-12-18 | 2016-05-25 | 武汉钢铁(集团)公司 | Continuously-cast slab surface scale breaking device and method |
| CN111805406A (en) * | 2020-07-19 | 2020-10-23 | 林璋 | Novel stainless steel surface polishing process |
-
2002
- 2002-03-13 JP JP2002068771A patent/JP2003266117A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1628784A2 (en) | 2003-04-07 | 2006-03-01 | The Material Works Ltd. | Method of removing scale and inhibiting oxidation in processed sheet metal |
| KR101357538B1 (en) | 2012-01-31 | 2014-02-03 | 현대제철 주식회사 | Scale removing apparatus of material front |
| JP2015030055A (en) * | 2013-08-01 | 2015-02-16 | 株式会社ディスコ | Grinder |
| CN105598189A (en) * | 2015-12-18 | 2016-05-25 | 武汉钢铁(集团)公司 | Continuously-cast slab surface scale breaking device and method |
| CN111805406A (en) * | 2020-07-19 | 2020-10-23 | 林璋 | Novel stainless steel surface polishing process |
| CN111805406B (en) * | 2020-07-19 | 2021-06-29 | 佛山市中力金属制品有限公司 | Stainless steel surface polishing process |
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