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1. 发明专利

JPH10212526A PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET EXCELLENT IN GLASS COATING 失效
公开(公告)号：JPH10212526A
公开(公告)日：1998-08-11
申请号：JP1401697
申请日：1997-01-28
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： KUMANO TOMOJI , FUJII HIROYASU , USHIGAMI YOSHIYUKI , SAKAIDA AKIRA , MUKAI MASAO , ONO MASAO , TANAKA OSAMU
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/06 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To obtain a grain oriented silicon steel sheet having extremely uniform glass coating at the time of coil annealing and simultaneously good in magnetic properties by executing annealing in such a manner that the oxidizing degree of an atmospheric gas in carburizing annealing is regulated to a fayalite forming region in a specified range over the whole range from temp. rising to soaking. SOLUTION: Decarburizing annealing is executed at 800 to 875 deg.C, and at this time, the oxidizing degree PH2 O/PH2 of an atmospheric gas at the time of temp. rising and soaking is regulated to a fayalite forming region of 0.15 to 0.59 from the viewpoint of thermochemical equilibrium. As for the preferable range, at the time of temp. rising of >=650 deg.C in the prestage of annealing or in the region from >=650 deg.C to within 30% of the prestage of a soaking zone, it is executed in such a manner that the oxidizing degree is more reduced than that in the soakin zone or that in the remaining soaking zone. Furthermore, in the post stage of the decarburizing annealing or in a cooling state, the oxidizing degree of the atmospheric gas till 500 deg.C is regulated. In the case gaseous H2 +N2 is used as the atmospheric gas, the ratio of PH2 /PH2 is regulated to 0.001 to 0.15. The content of Fe oxide in oxidized coating after the decarburizing annealing is regulated to 0.05 to 1.0g/m .

2. 发明专利

JPH0941038A METHOD FOR MEASURING SIZE OF PRIMARILY RECRYSTALLIZED GRAIN OF SILICON STEEL SHEET 失效
公开(公告)号：JPH0941038A
公开(公告)日：1997-02-10
申请号：JP19770995
申请日：1995-08-02
申请人： NIPPON STEEL CORP
发明人： MOGI TAKASHI , YOSHITOMI YASUNARI , ONO MASAO
IPC分类号： C21D8/12
摘要： PROBLEM TO BE SOLVED: To solve the dispersion of core loss value and to improve measuring accuracy, at the time of measuring the size of primarily recrystallized grains based on core loss value measured by applying a magnetic field to a silicon steel sheet, by removing a nitrided layer on the surface of the steel sheet and measuring the core loss value. SOLUTION: Before the start of secondary recrystallization in final-finish annealing after hot rolling, as to the measurement of core loss value in a primarily recrystallized sheet subjected to nitriding treatment, the surface layer to 20μm from the surface of the steel sheet is removed by using a means such as grinding. This is because that the nitrogen content in the sheet width direction of the nitrided steel sheet varies to the average nitrogen content in the whole body, also, the sheet thickness distribution of the nitrogen content is not similar in the sheet width direction, the nitrogen content in the surface layer varies, and this difference causes the dispersion of the measured value of core loss, so the surface layer of the steel sheet in which nitriding variation is present is removed. Moreover, this measuring method is applicable to any parameter measurement related to secondary recrystallizing phenomenohs such as the average grain size, the ratio of coarsened grains and the distribution of the grain size.

3. 发明专利

JPH07292421A CONTINUOUS ANNEALING APPARATUS FOR STEEL STRIP AND ITS TENSION CONTROL DEVICE 失效
公开(公告)号：JPH07292421A
公开(公告)日：1995-11-07
申请号：JP8867094
申请日：1994-04-26
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAMIYA TSUTOMU , IMANAKA NARIKAZU , HONDA TOSHIMITSU , KITAWAKI YASUO , ONO MASAO , HATTORI YOSHITAKA , GOSHI HIROO , KATO HARUMI
IPC分类号： C21D11/00 , C21D9/56
摘要： PURPOSE:To provide an continuous annealing apparatus for steel strip and its tension control device, in which the development of heat buckling, scratch and walk of the steel strip is prevented and the productivity and the quality are improved, in a continuous process line for producing the mild steel strip for drawing, etc. CONSTITUTION:In the continuous annealing furnace for steel strip S having a heating zone, a soaking zone, a primary cooling zone, an overaging zone and a secondary cooling zone, bridle rolls 3 in the furnace are arranged between the overaging zone 25 and the secondary cooling zone 26. Further, the first bridle rolls 1, the second bridle rolls 2 and buffering rolls abutted on the steel strip S between these bridle rolls are arranged at the inlet side and/or the outlet side. By this constitution, the buckling, width shrinkage, etc., of the steel strip S can be prevented.

4. 发明专利

JPH05320770A PRODUCTION OF HIGH MAGNETIC FLUX DENSITY GRAIN-ORIENTED SILICON STEEL SHEET HAVING NO GLASS FILM 失效
公开(公告)号：JPH05320770A
公开(公告)日：1993-12-03
申请号：JP13118992
申请日：1992-05-22
申请人： NIPPON STEEL CORP
发明人： TANAKA OSAMU , MASUI HIROAKI , HARATANI TSUTOMU , ONO MASAO
IPC分类号： C21D1/70 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/06 , C23C22/00
摘要： PURPOSE:To manufacture a high magnetic flux density grain-oriented silicon steel sheet excellent in the capacity of core loss improving effect by magnetic domain subdividing by coating a steel sheet with a separation agent for annealing contg. an S compound of Li or the like by specified wt.pts. to MgO and added with chloride or the like of the same and thereafter executing annealing under specified conditions. CONSTITUTION:A silicon steel slab contg., by weight, 0.03 to 0.12% C, 2.5 to 4.5% Si or the like, and the balance Fe is subjected to hot rolling, annealing, rapid cooling, cold rolling, decarburizing annealing, the coating of a separation agent for annealing and final finish annealing, and heat flattening is executed to manufacture the objective grain-oriented silicon steel sheet; where it is coated with a separation agent for annealing contg. one or more kinds among S compounds of Li, Ca, Zn or the like by 5 to 20 wt.pts. to 100 wt.pts. of MgO and furthermore added with one or more kinds among the chloride, carbonate and nitrate of the elements by 2 to 20 wt.pts. As for the subsequent final annealing conditions, it is annealed in an atmosphere contg.

5. 发明专利

JPH05104102A METHOD FOR TEMPER ROLLING STEEL STRIP 失效
公开(公告)号：JPH05104102A
公开(公告)日：1993-04-27
申请号：JP9328791
申请日：1991-03-30
申请人： NIPPON STEEL CORP
发明人： TAKEMOTO MASAKANE , NISHIURA TETSUYA , ONO MASAO
IPC分类号： B21B1/22 , B21B27/00
摘要： PURPOSE:To improve productivity by forming the top parts of projecting and recessed protrusions on the surface of a work roll into approximately flat faces and rolling a steel strip. CONSTITUTION:The top parts of projecting and recessed protrusions 2 which are provided on the surface of the work roll 1 are formed into approximately flat faces 3. The steel strip is rolled using this work roll 1. This roll is made so that the area of the flat faces 3 which are formed on the projecting and recessed top parts is 20-95% of the area of effective roll surface. For forming a rugged pattern, either of a method that flattening work (grinding or the like) is executed after dulling work, mechanical, chemical or electric method of etching means such as lithography method or the like and other methods can be adopted. In this way, image clarity of painting on the surface of the steel sheet of a product can be improved.

6. 发明专利

JPH0569014A SURFACE WORKING METHOD FOR ROLLING ROLL 失效
公开(公告)号：JPH0569014A
公开(公告)日：1993-03-23
申请号：JP3762991
申请日：1991-03-04
申请人： NIPPON STEEL CORP
发明人： KURAHASHI MOTOFUMI , TAKEMOTO MASAKANE , ONO MASAO , NISHIURA TETSUYA
IPC分类号： B21B27/00 , B21B1/22 , B21B27/02 , B24B5/04 , B24B5/37 , C23F1/00
摘要： PURPOSE:To manufacture a cold-rolled steel plate which has no waviness, is excellent in painting distinctness of image, and satisfactory in workability by performing ruggedness working to the roll surface having a minute rugged surface, and thereafter, grinding a projecting part on this surface and grinding minute waviness. CONSTITUTION:On the surface of a roll 1 having a minute rugged and rough surface, a working rugged projection 4 is formed by performing a lithography method, etc. By executing burnishing, wet blasting, and grinding such as magnetic fluid polishing, etc., to the roll surface subjected to working the rugged projection becomes a flat surface 18 to roughly prescribed height (h), and the roll surface having a regular rugged pattern in which there is scarcely minute waviness is formed. Also, wear resistance, etc., are given by executing Cr plating 19 to the ground surface as necessary. In such a way, by executing rolling by using a flattened work roll, this component is transferred to the surface of a steel plate, and a cold-rolled steel plate which is excellent in painting distinctness of image and satisfactory in workability can be manufactured.

7. 发明专利

JPH02121711A THRUST FORCE DETECTING DEVICE FOR WORK ROLL OF ROLLING MILL 失效
公开(公告)号：JPH02121711A
公开(公告)日：1990-05-09
申请号：JP27327088
申请日：1988-10-31
申请人： ORIENTETSUKU KK , NIPPON STEEL CORP
发明人： YOSHIZAWA TATSUO , SAITO MAKOTO , ONO MASAO
IPC分类号： B21B31/16 , B21B37/00 , B21C51/00 , G01L5/12
摘要： PURPOSE:To efficiently control parallelism by providing a load cell locked at one end on the hollow part of a bearing section fixed in thrust direction on the work roll shaft. CONSTITUTION:On the shaft 5a of the work roll 5, the fixed bearing section 7 not moving in the axial direction is fit on the hollow part 7a formed on its peripheral surface, and end part 8a of the load cell 8 adhering a strain gage is locked. When the orthogonal direction to a steel band 1 to be rolled and the axis of the work roll 5 is parallel and not in accord with the state where the right end is lifted, the component of the force through the frictional force, a thrust in the right direction is generated on the work roll 5. Therefore, as the actual adjusting operation of the parallelism, the front end of the steel band 1 to be rolled is rolled and while detecting the thrust force at this time through the load cell 8, to control the position of the bearing section 7 to make the thrust force to be zero, the adjusting is simply enabled.

8. 发明专利

JP2011158328A Oxide coating film adhesion strength evaluation method and its evaluation device of directional electromagnetic steel plate 有权
标题翻译：氧化涂层胶粘剂强度评估方法及其方向电磁钢板的评价装置
公开(公告)号：JP2011158328A
公开(公告)日：2011-08-18
申请号：JP2010019268
申请日：2010-01-29
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HAMAMURA HIDEYUKI , HAMAYA TAKESHI , ONO MASAO , SASAKI TETSUYA
IPC分类号： G01N19/04 , G01N3/00 , G01N21/17 , G01N21/84
摘要： PROBLEM TO BE SOLVED: To provide a method capable of simply, shortly and continuously on-line evaluating a measure of adhesion strength between ferrite and an oxide coating for a directional electromagnetic steel plate under non-contact and non-destruction. SOLUTION: The method, evaluating an adhesion strength of oxide coating of a directional electromagnetic steel plate having an oxide coating on ferrite surface and an insulating coating on the oxide coating, includes a step of lighting an area in a width direction of the directional electromagnetic steel plate, a step of taking a picked-up image by imaging a range containing the lighted area of the directional electromagnetic steel plate, a step of obtaining a luminance value Lm at the lighted area of the directional electromagnetic steel plate by image processing, and a step of calculating a bending peel diameter calculation value Dm from the luminance value Lm based on a relational expression between a luminance value L and a bending peel diameter D of the directional electromagnetic steel plate, thereby evaluating the adhesion strength of oxide coating of the directional electromagnetic steel plate. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够简单，短期和连续地在非接触和非破坏下线性评估铁氧体与定向电磁钢板的氧化物涂层之间的粘合强度的测量的方法。解决方案：评估在铁氧体表面上具有氧化物涂层的方向性电磁钢板和氧化物涂层上的绝缘涂层的氧化物涂层的粘合强度的方法包括以下步骤：点亮所述氧化物涂层的宽度方向上的区域定向电磁钢板，通过对包含定向电磁钢板的点亮区域的范围成像拍摄拍摄图像的步骤，通过图像处理获得定向电磁钢板的点亮区域的亮度值Lm的步骤以及根据亮度值L和方向电磁钢板的弯曲剥离直径D之间的关系式从亮度值Lm计算弯曲剥离直径计算值Dm的步骤，从而评价氧化涂层的粘附强度定向电磁钢板。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2000026978A METHOD FOR COLLECTING INORGANIC MINERAL COATING OF STEEL SHEET EXCELLENT IN QUANTITATIVITY OF COMPOSITION ANALYSIS 失效
公开(公告)号：JP2000026978A
公开(公告)日：2000-01-25
申请号：JP19426698
申请日：1998-07-09
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： FUJII HIROYASU , YAMAZAKI SHUICHI , TAKEDA KAZUTOSHI , TANAKA OSAMU , ONO MASAO
IPC分类号： G01N1/28 , C23C22/00 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To completely peel an oxide-base inorg. mineral coating formed on the surface of a steel sheet without including ferrite in the coating and to improve the quantitativity of the results of analysis of the coating by chemically dissolving only the ferrite part of the steel sheet and collecting the coating. SOLUTION: Only the ferrite part of a steel sheet is chemically dissolved using a soln. contg. halogen compds. as a solute in an org. solvent or water as a solvent and an oxide-base inorg. mineral coating formed on the surface of the steel sheet is collected. The solvent is preferably an org. solvent such as methanol in consideration of dryability. The halogen is preferably bromine and iodine from the viewpoint of the solubility of the steel sheet. When the steel sheet is immersed in the soln. and the coating is peeled, the peeling of the coating is promoted by irradiation with ultrasonic waves and the coating can be peeled in a short time. Even if the peeled coating includes ferrite, this ferrite is dissolved in the soln. before analysis. Thus the coating is not prepared for analysis in the state including the ferrite.

10. 发明专利

JPH08174005A DRY TEMPER-ROLLING METHOD FOR STEEL STRIP 失效
公开(公告)号：JPH08174005A
公开(公告)日：1996-07-09
申请号：JP32010994
申请日：1994-12-22
申请人： NIPPON STEEL CORP
发明人： ONO MASAO , KAZAOKA ISATO , ITO SHOZO
IPC分类号： B21B27/10 , B21B1/22 , B21B45/02
摘要： PURPOSE: To prevent the occurrence of seams which are caused on work rolls by rolling while applying volatile oil and fat in mist-form by spraying to parts of work rolls corresponding to both edge parts of a rolled steel strip. CONSTITUTION: At the time of executing dry temper-rolling to the rolled steel strip 2, rolling is executed while applying the volatile oil and fat in mist-form by spraying with spray nozzles 8 on the parts 7 of the upper work roll 6 and lower work roll corresponding to both sides of the rolled steel strip 2 from the inlet side of the steel strip at a 1st and 2nd stands. When the width size of the rolled steel strip 2 is changed, the positions of the spray nozzles 8 is moved. In this way, rolling schedule is optionally selected and productivity is improved. Further, the repair of the work rolls 6 corresponding to the occurrence of seams is unnecessitated.

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