公开(公告)号：JPH11302883A

公开(公告)日：1999-11-02

申请号：JP11453098

申请日：1998-04-24

Applicant: SUMITOMO METAL IND

Inventor： YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: B21B1/22 ,  B21B1/36 ,  B21B3/02 ,  B21B45/02 ,  C23G1/24

Abstract: PROBLEM TO BE SOLVED: To obtain a steel sheet having high brightness and high surface quality in spite of rolling at a high rolling speed by executing wiping of the steel sheet surface with steam at least prior to rolling in a final pass. SOLUTION: The austenitic stainless steel sheet is cold rolled by a reverse rolling mill using an oil-in-water type emulsion oil. The steam is injected to the steel sheet surface after one pass and after two passes in such a manner that the steel sheet temp. before the second pass attains >=65 deg.C and that the steel sheet temp. before the third pass attains >=75 deg.C. The wiping of the steel sheet surface is executed by the steam prior to rolling in at least the final pass, by which the oil-component and worn powder deposited on the steel sheet surface are removed. As a result, the purposes may be achieved and further edge cracking, chatter marks and sheet breakage may be prevented. The raw liquid of the emulsion oil is prepd. by using mineral oil, synthetic hydrocarbon, etc., having a low viscosity as a base oil and adding synthetic esters thereto.

公开(公告)号：JPH11156405A

公开(公告)日：1999-06-15

申请号：JP33037797

申请日：1997-12-01

Applicant: SUMITOMO METAL IND

Inventor： YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: B21B1/22 ,  B21B1/36 ,  B21B3/02 ,  B21B27/10 ,  B21B45/02

Abstract: PROBLEM TO BE SOLVED: To provide a method for cold rolling by which a surface quality free from winding flaws, roll indentation flaws, gloss irregularities, galling or the like is obtained even in case of rolling a stainless steel sheet at a high rolling velocity of >=600 mpm by a reversing mill, above all in the case of ferritic stainless steel obtaining a gloss of >=400 at Gs 60 deg.C. SOLUTION: When a stainless steel sheet 20 is cold rolled by a reversing mill having small sized work rolls 10 with a diameter of >=50 mm and =6 cSt and

公开(公告)号：JPH10273689A

公开(公告)日：1998-10-13

申请号：JP7763697

申请日：1997-03-28

Applicant: KYODO YUSHI ,  SUMITOMO METAL IND

Inventor： SAKAKIBARA MASAYOSHI ,  OIKAWA ISAO ,  YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: C10M169/04 ,  C10N30/02 ,  C10N30/04 ,  C10N30/06 ,  C10N30/08 ,  C10N40/24

Abstract: PROBLEM TO BE SOLVED: To obtain the subject oiling agent exhibiting a low viscosity and an excellent lubricating property, capable of reducing an adhesion amount and the generation of seizing, and useful for producing highly lustrous stainless steel plates by a high speed rolling method by compounding a specific base oil, a secondary amine, a phosphite ester and a surfactant. SOLUTION: This water-soluble cold rolling oil agent comprises (A) a base oil (including a mineral oil, a synthetic ester or a synthetic hydrocarbon oil), (B) a secondary amine such as a compound of the formula: NHR R [R , R are each a (un)saturated (branched) alkyl, a (un)saturated cycloalkyl, an aryl], (C) a phosphite ester such as a compound of the formula: (R O)(R O)PH(=0) (R , R are each R ), a compound of the formula: (R O)(R O)POH or a compound of the formula: (R O)(R O)(R O)P (R is R ), and (D) surfactant such as a nonionic surfactant or an anionic surfactant.

公开(公告)号：JPH1071404A

公开(公告)日：1998-03-17

申请号：JP22980396

申请日：1996-08-30

Applicant: SUMITOMO METAL IND

Inventor： MATSUSHITA SATORU ,  YAMAMOTO HIDEO

IPC: B21B3/02 ,  B21B1/22 ,  B21B45/02 ,  C10M171/02 ,  C10M173/00 ,  C10N20/02 ,  C10N40/24

Abstract: PROBLEM TO BE SOLVED: To prevent generation of roll coating on the surfaces of rolls regardless of draft to maintain satisfactory gloss on the surface of the steel strip after bright annealing, and to prevent the occurrence of uneven gloss by specifying the viscosity of the stock solution of the rolling mill lubricant of oil in water type emulsion rolling mill lubricant and a rolling speed, and performing finish cold rolling. SOLUTION: After performing the cold rolling of the stainless steel hot rolled strip and performing bright annealing, finish cold rolling is performed at a rolling speed of 300m/minute or below by a rolling mill with work rolls whose roll diameter is 250mm or below by using the oil in water type emulsion rolling mill lubricant consisting of the stock solution of the rolling mill lubricant whose viscosity at 40 deg.C is 15cSt or below and water. That is, the bright annealing is performed as finish annealing, the emulsion rolling mill lubricant is used in the finish cold rolling, and by preventing the generation of the uneven roll coating, uneven gloss generating on the surface of the steel strip can be prevented, and the stainless steel strip for the spring with a surface having high gloss can be easily obtained.

公开(公告)号：JPH09216006A

公开(公告)日：1997-08-19

申请号：JP2079596

申请日：1996-02-07

Applicant: SUMITOMO METAL IND

Inventor： OKUI TOSHIYUKI ,  MATSUSHITA SATORU

IPC: B21B3/02 ,  B21B1/22 ,  B21B13/14

Abstract: PROBLEM TO BE SOLVED: To prevent inferior flatness generated in cold finish rolling by simple method at the time of manufacturing a stainless steel strip for leaf springs whose surface roughness is in a degree of 0.8-2.0μm by center-line mean roughness Ra. SOLUTION: This method is a method for cold finish rolling of the cold rolled stainless steel strip for leaf springs with a 4 or 6-stage rolling mill and cold rolling is executed by setting work rolls 5 on the inlet side of the rolling mill so that an angle formed with a line with which the center of the cross section of the back-up roll 7 or intermediate roll 6 in contact with the work roll 5 and the center of the cross section of the work roll 5 on the same vertical plane as that cross section are linked and a perpendicular line is in the range of 2-5 deg..

公开(公告)号：JP2000158034A

公开(公告)日：2000-06-13

申请号：JP34241198

申请日：1998-12-02

Applicant: SUMITOMO METAL IND

Inventor： YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: B21B1/22 ,  B01F3/08 ,  B01F5/02 ,  B21B45/02

Abstract: PROBLEM TO BE SOLVED: To execute high-speed rolling without generating burning, chattering and irregularity of gloss by supplying the stock liquid of rolling oil including an emulsifier by forcing the liquid at a specified flow velocity from nozzles provided with an opening part having a specified cross-sectional area into a tank for supplying the rolling oil, into oil-in-water type emulsion oil in supply piping from the tank to a rolling mill and into a liquid in water in water supply piping to the tank. SOLUTION: It is preferable to supply by forcing the stock liquid of rolling oil including the emulsifier into at least one liquid of the oil-in-water type emulsion oil 2 in the tank 1, in the in-water type emulsion oil in the supply piping 7 from the tank to the rolling mill and in the water in the water supply pipe 3 to the tank from the nozzles 4a-4c providing with one or more opening parts whose cross-sectional area is

公开(公告)号：JP2000061506A

公开(公告)日：2000-02-29

申请号：JP23818398

申请日：1998-08-25

Applicant: SUMITOMO METAL IND

Inventor： MATSUSHITA SATORU ,  YAMAMOTO HIDEO

IPC: B21B3/02 ,  B21B45/02

Abstract: PROBLEM TO BE SOLVED: To provide a reversible rolling method of an austenitic stainless steel sheet using emulsion rolling oil with which the generation of an edge crack and chatter mark is prevented and high efficiency rolling raising rolling speed and draft is enabled. SOLUTION: At the time of cold-rolling the austenitic stainless steel sheet with a reversing rolling mill using oil-in-water type emulsion rolling oil, by adjusting the feed rate of the emulsion rolling oil, control is executed so that the temp. of the steel sheet on the outlet side of a 1st pass is >=70 deg.C and the temp. of the steel sheet on the outlet side of each pass on and after the 2nd pass is >=80 deg.C and, by taking inlet-side tension as =50%, cold rolling is executed.

公开(公告)号：JPH10298586A

公开(公告)日：1998-11-10

申请号：JP10476097

申请日：1997-04-22

Applicant: SUMITOMO METAL IND

Inventor： YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: B21B3/02 ,  B21B27/10 ,  B21B45/02 ,  C10M171/06 ,  C10M175/04 ,  C10N20/06 ,  C10N30/00 ,  C10N40/24 ,  C10N70/00

Abstract: PROBLEM TO BE SOLVED: To enable the high-speed cold rolling of both ferrite and austenite stainless steel with the same rolling oil and obtain steel plate of high gloss by specifying the kinds of ionic emulsifiers and the pH of the liquid emulsion. SOLUTION: When stainless steel is cold-rolled by using an emulsion oil containing ionic emulsifier(s) as a rolling oil, the pH of the emulsion oil is made weakly acidic, 4.0-6.5 pH in the case that a cationic emulsifier is used, while the pH is adjusted to 7.5-9.5, weakly alkaline, in the case that an anionic emulsifier is employed. Further, in the emulsion tank, the emulsion is separated into high-concentration and large particle size emulsion and low-concentration fine particle size emulsion to collect individual emulsions. These fractions are properly selected, mixed and used as a rolling oil.

公开(公告)号：JPH1058010A

公开(公告)日：1998-03-03

申请号：JP22494796

申请日：1996-08-27

Applicant: SUMITOMO METAL IND

Inventor： YAMAMOTO HIDEO ,  MATSUSHITA SATORU

IPC: B21B3/02 ,  B21B45/02

Abstract: PROBLEM TO BE SOLVED: To facilitate high-speed rolling and to obtain high gloss over the entire length of a steel strip in the rolling using emulsion rolling oil in a rolling mill provided with small diameter work rolls whose diameters are 50-120mm. SOLUTION: An ferritic stainless steel strip is cold-rolled with the rolling mill provided with the small diameter work rolls whose diameters are 50-120mm and using emulsion oil as rolling oil. In such a case, the cold rolling is executed by controlling so that the surface temp. of the steel strip just after cold rolling become a temp. in the range between a temp. Tmax ( deg.C) which is obtained by the formula (1) and a temp. Tmin ( deg.C) which is obtained by the formula (2). Formula (1): Tmax=190-2.5(7-η). Formula (2): Tmin=-1.07×10 V +0.226 V+6×10 (1400-V)(η-7)+42. Where, V is the rolling speed (m/min), η is the viscosity (cSt) of the undiluted solution the emulsion oil at 40 deg.C.

公开(公告)号：JPH07228926A

公开(公告)日：1995-08-29

申请号：JP2258394

申请日：1994-02-21

Applicant: SUMITOMO METAL IND

Inventor： MATSUSHITA SATORU ,  MATSUDAIRA YUKIHIKO ,  OKAMURA KAZUO ,  KOJIMA TOSHIO ,  HIUGAJI YUKIO

IPC: C21D9/56 ,  C21D1/00

Abstract: PURPOSE:To prevent the development of an edge extension and a center buckling of a steel strip by arranging heating means in an air cooling zone in a vertical continuous annealing furnace, detecting a steel strip temp. at the outlet side of a heating means and controlling the heating temp. CONSTITUTION:In the vertical continuous annealing furnace 1, a heating means 10 is added to the inner part of the air cooling zone 5. A first steel strip temp. detecting means 11 is arranged at the lower part of this heating means 10, i.e., the outlet side of the air cooling zone 5. Further, if necessary, a second steel strip temp. detecting means 12 is added to the upper part of the heating means 10. These means 10, 11, 12 are electrically connected with a heating control means 13. The heating means 10 is controlled based on the signals of the steel strip temp. detecting means 11, 12 to suitably heat the steel strip W to the temp., at which the development of the buckling is free from care. By this method, low speed strip passing can stably be executed.