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1. 发明专利

JP2005105345A Method for producing austenitic stainless steel sheet excellent in uniformity of surface 有权
标题翻译：生产表面均匀性优异的奥氏体不锈钢板的方法
公开(公告)号：JP2005105345A
公开(公告)日：2005-04-21
申请号：JP2003339993
申请日：2003-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSUCHINAGA MASAMITSU , TAKAHASHI AKIHIKO , OTSUBO TOSHINORI
IPC分类号： C21D9/46
摘要： PROBLEM TO BE SOLVED: To obtain a good steel sheet excellent in the uniformity of surface grade after pickling by drastically preventing a pattern having drop-state of water, water stream-state or map-state, developed on the steel sheet surface after pickling, when an austenitic stainless steel slab is hot-rolled, annealed and subjected to pickling for descaling.
SOLUTION: In a method for producing the steel sheet by casting the austenitic stainless steel with a continuous casting apparatus and successively, hot-rolling and annealing and thereafter, pickling for descaling, the cooling just after hot-rolling is performed under any condition among (1) natural-cooling is performed until the steel sheet temperature becomes
摘要翻译：要解决的问题：为了获得在酸洗后表面等级均匀性优异的钢板，通过显着地防止在钢板表面上显影的水，水流状态或地图状态的下降状态的图案酸洗后，奥氏体不锈钢板坯进行热轧，退火并进行酸洗除垢。解决方案：在通过连续铸造设备浇铸奥氏体不锈钢并依次进行热轧退火，然后酸洗除垢的钢板的制造方法中，热轧后的冷却是在任何（1）自然冷却之前的条件进行到钢板温度<600℃，（2）从钢板的温度超过800℃开始水冷，（3）自然冷却后直到钢板温度≤800℃，再加热后开始水冷，升温至800℃以上。此外，作为退火条件，钢板在≥1070℃保持≥5分钟，进一步优选在≥1100℃下≥15分钟。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2002363711A FERRITIC STAINLESS STEEL SHEET FOR FUEL TANK 审中-公开
公开(公告)号：JP2002363711A
公开(公告)日：2002-12-18
申请号：JP2001231870
申请日：2001-07-31
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI AKIHIKO , SAKAMOTO TOSHIHARU , KOYAMA YUJI , KATO KATSUHIKO , KOMORI TADASHI , ONO NAOTO
IPC分类号： B60K15/03 , C21D8/04 , C22C38/00 , C22C38/18 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet which has excellent long term corrosion resistance in the environment of a fuel tank, and is formable to a fuel tank. SOLUTION: (1) The ferritic stainless steel for a fuel tank contains, by mass, 10 to 25% Cr, and in which the average r value is >=1.9, the plane anisotropy of the r value Δr is =30%. (2) In the plane orientation of the above steel sheet, the intensity ratio between the (111) plane and the (100) plane, i.e., I (111)/I (100) is controlled to >=10. (3) A lubrication film is applied to the surface of the steel sheet in the above (1) and (2), and the friction coefficient of the same surface is controlled to

3. 发明专利

JP2001003144A HIGH PURITY FERRITIC STAINLESS STEEL SHEET EXCELLENT IN SECONDARY WORKING BRITTLENESS AFTER DEEP DRAWING 失效
公开(公告)号：JP2001003144A
公开(公告)日：2001-01-09
申请号：JP17675299
申请日：1999-06-23
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI AKIHIKO , ABE MASAYUKI , TSUCHINAGA MASAMITSU
IPC分类号： C22C38/00 , C22C38/28 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To provide a method for improving the secondary working brittleness resistance after deep drawing of a high purity ferritic stainless steel sheet without deteriorating its excellent ductility and deep drawability. SOLUTION: This steel sheet has a composition which contains, by weight, =7.0% and the range of Mg(%) satisfies >=0.05%×P(%).

4. 发明专利

JP2000336462A HIGH PURITY FERRITIC STAINLESS STEEL EXCELLENT IN HIGH TEMPERATURE STRENGTH 失效
公开(公告)号：JP2000336462A
公开(公告)日：2000-12-05
申请号：JP14876099
申请日：1999-05-27
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI AKIHIKO , ABE MASAYUKI
IPC分类号： C22C38/00 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide Ti-added ferritic stainless steel in which the precipitation of Nb at 650 to 750 deg.C is advantageously prevented, and which has an excellent high temp. strength even after use for a long time. SOLUTION: This steel contains, by weight,

5. 发明专利

JP2000178693A FERRITIC STAINLESS STEEL SHEET HAVING HIGH TEMPERATURE STRENGTH AT INTERMITTENT HEATING AND OXIDE SCALE PRACTICALLY FREE FROM PEELING 失效
公开(公告)号：JP2000178693A
公开(公告)日：2000-06-27
申请号：JP35029598
申请日：1998-12-09
申请人： NIPPON STEEL CORP
发明人： TSUCHINAGA MASAMITSU , TAKAHASHI AKIHIKO
IPC分类号： C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet, as an exhaust system material, capable of securing high temperature strength in an intermittently heated state and hardly causing peeling of the resultant oxide scale. SOLUTION: This steel sheet has a composition consisting of, by weight, 0.002-0.03% C, =6 and containing, if necessary, 0.2-3.0% Mo or further 0.1-1.0% Nb or further either or both of 0.01-0.10% Zr and 0.0010-0.0050% Mg.

6. 发明专利

JP2000144442A PASSIVATING TREATMENT OF STAINLESS STEEL 失效
公开(公告)号：JP2000144442A
公开(公告)日：2000-05-26
申请号：JP31818198
申请日：1998-11-09
申请人： NIPPON STEEL CORP
发明人： TADOKORO YUTAKA , TAKAHASHI AKIHIKO
IPC分类号： C23C22/00 , C23C22/72 , C23C22/78
摘要： PROBLEM TO BE SOLVED: To strengthen a passivating film and to improve corrosion resistance by immersing a stainless steel in a sulfate solution containing Ce(IV) ion of specific concentration, washing it in water, and then drying it. SOLUTION: An aqueous solution of ceric ammonium sulfate dihydrate [Ce(NH4)4(SO4)4.2H2O] is prepared so that 0.2-2.5% of Ce(IV) ions are contained. This sulfate solution is held at about 40 to 60 deg.C, and a stainless steel is immersed in this solution or this solution is applied to the stainless steel into liquid film state to carry out passivating treatment for about >=10 min. Then, the stainless steel is washed in water and dried. In this case, application into liquid film state is recommended for increasing the amount of oxygen supplied from the air and densifying the resultant passivating film (oxide film). As the means of application, application by the use of a brush, etc., or atomization by the use of an atomizer is adopted. By this method, passivating treatment can be performed with minimized harmfulness while simplifying the aftertreatment stage after passivating treatment using a strongly oxidizing acid.

7. 发明专利

JP2000045026A SLAB HEATING METHOD 失效
公开(公告)号：JP2000045026A
公开(公告)日：2000-02-15
申请号：JP21000598
申请日：1998-07-24
申请人： NIPPON STEEL CORP
发明人： TSUCHINAGA MASAMITSU , TAKAHASHI AKIHIKO
IPC分类号： C21D6/00 , C21D1/52 , C21D9/00 , C22C38/00 , C22C38/18
摘要： PROBLEM TO BE SOLVED: To lower the critical temperature thereby preventing the formation of abnormal oxidized nodule and forming uniform thick oxide scale at the time of slab heating for hot rolling and to prevent the occurrence of hot roll scale defects, and to provide a hot rolled steel strip in which the coarsening of the texture after slab heating is prevented and the crystal grain size of steel strip after hot rolling is made to be fine and also the crystal orientation is randomized. SOLUTION: In this slab heating method, an oxygen-feeding gas increased in oxygen concentration to >=30 vol.% is sued for the combustion of gaseous fuel for heating and further H2O is blown to control combustion temperature at the time of heating a slab for hot rolling. This method has effect, in particular, on a stainless steel containing 7-25 wt.% Cr and

8. 发明专利

JPH11302739A PRODUCTION OF FERRITIC STAINLESS STEEL EXCELLENT IN SURFACE PROPERTY AND SMALL IN ANISOTROPY 失效
公开(公告)号：JPH11302739A
公开(公告)日：1999-11-02
申请号：JP11391098
申请日：1998-04-23
申请人： NIPPON STEEL CORP
发明人： ABE MASAYUKI , TAKAHASHI AKIHIKO , SHIMADA TETSUYA , SENUMA TAKEHIDE
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/28 , C22C38/32
摘要： PROBLEM TO BE SOLVED: To provide a method for producing ferritic stainless steel improving the workability of ferritic stainless steel and furthermore capable of improving it ridging characteristics. SOLUTION: At the time of subjecting ferritic stainless steel having a compsn. contg., by weight, 0.0005 to 0.010% C, 0.0010 to 0.040% S, =80%, also, the cumulative draft in the final three passes in the rough rolling is regulated to >=60%, and the rough rolling is finished at >=1,000 deg.C. Then, finish rolling is executed in such a manner that the total distortion in the rough rolling (logarithmic distortion: εr) and the total distortion in the finish rolling (logarithmic distortion: εf) satisfy εr

9. 发明专利

JPH11140699A METHOD FOR REMOVING ADHEREND TO SURFACE OF STAINLESS STEEL 失效
公开(公告)号：JPH11140699A
公开(公告)日：1999-05-25
申请号：JP31073297
申请日：1997-11-12
申请人： NIPPON STEEL CORP
发明人： TADOKORO YUTAKA , TAKAHASHI AKIHIKO
IPC分类号： C25F1/06
摘要： PROBLEM TO BE SOLVED: To provide a method for quickly removing adhesive foreign matters to a base material such as oxides and hard materials (sand grains, glass pieces, etc.), in which dissolution of the base material of the stainless steel is suppressed as an alternative of a conventional cleaning method. SOLUTION: A stainless steel to which foreign matters are adhered is immersed in hydrochloric acid or sulfuric acid to which the inhibitor is added, and foreign matters adhered to the surface are quickly removed without dissolving the base material by achieving the anode electrolysis by the pulse current while applying the ultrasonic wave oscillation. The pulse current pattern is preferably >=10 A/dm to in negative current density, >=0.01 second to =0.01 second to

10. 发明专利

JPH10298658A MANUFACTURE OF HIGH PURITY FERRITIC STAINLESS STEEL SHEET EXCELLENT IN RIDGING RESISTANCE 失效
公开(公告)号：JPH10298658A
公开(公告)日：1998-11-10
申请号：JP10219697
申请日：1997-04-18
申请人： NIPPON STEEL CORP
发明人： KOYAMA YUJI , TAKAHASHI AKIHIKO , SUMITOMO HIDEHIKO
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/32
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a high purity stainless steel sheet excellent in ridging resistance. SOLUTION: A high purity ferritic stainless steel, in which steel components are regulated so that the steel contains, by mass, =5 min.

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