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1. 发明申请

WO1989008729A1 PROCESS FOR PICKLING ELECTRICAL STEEL SHEET 审中-公开
标题翻译：电镀钢板的工艺
公开(公告)号：WO1989008729A1
公开(公告)日：1989-09-21
申请号：PCT/JP1989000260
申请日：1989-03-09
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C23G01/08
CPC分类号： C23G1/08
摘要： A process for pickling an electrical steel sheet, which can provide an electrical steel sheet having an excellent surface state without requiring any special works and causing and increase in cost, and which comprises pickling a hot-rolled steel sheet with hydrochloric acid for a pickling time determined based on the amount of silicon in the steel sheet, the temperature of pickling solutoin, etc. taking into consideration not only descaling but also erosion of grain boundary as well.

2. 发明申请

WO1989008721A1 PROCESS FOR PRODUCING NONORIENTED ELECTRIC STEEL SHEET 审中-公开
标题翻译：生产非电解电工钢板的工艺
公开(公告)号：WO1989008721A1
公开(公告)日：1989-09-21
申请号：PCT/JP1989000242
申请日：1989-03-07
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1222 , C21D8/12
摘要： A process for producing nonoriented electric steel sheet having excellent magnetic properties by hot direct rolling, which comprises conducting hot direct rolling of continuously cast slab without heat retention or soaking to depress precipitation of AlN except for unavoidably precipitated AlN, conducting rough rolling and finish rolling with a predetermined draft while providing a stand-by time between said rough rolling step and said finish rolling step, conducting said finish rolling at a point lower than the Ar3 point to effectively introduce nuclei for precipitation of AlN, and winding up the sheet at 700°C or above to agglomerate and coarsen AlN. This process enables highly uniform and good ferrite particles to grow upon recrystallization and annealing.

3. 发明申请

WO1989008722A1 METHOD OF MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL PLATES 审中-公开
标题翻译：制造非定向电磁钢板的方法
公开(公告)号：WO1989008722A1
公开(公告)日：1989-09-21
申请号：PCT/JP1989000261
申请日：1989-03-09
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1261 , C21D8/1205 , C21D8/1222
摘要： An object of the present invention is to provide a method of manufacturing a non-oriented electromagnetic steel plate, capable of saving energy by reheating a slab in a hot state, and of obtaining a non-oriented electromagnetic steel plate, which has excellent magnetic characteristics and uniformity of magnetic characteristics over the whole length of a coil, without retaining the heat of the slab. To achieve the object of the present invention, a continuously cast slab of predetermined composition is reheated in a high temperature region while controlling the thermal hysterisis of the slab to the conditions under which the slab passes twice a region in the vicinity of a precipitation nose, whereby the enlarging of AlN precipitate and the uniforming of the enlargement of this precipitate over the whole length of the slab are achieved. The resultant slab is then hot-rolled, and the hot-rolled plate is annealed under special conditions so as to attain the coagulation and enlargement of AlN and the growth of recrystallized particles of ferrite.

4. 发明申请

WO1989008720A1 PROCESS FOR PRODUCING NONORIENTED ELECTRIC STEEL SHEET 审中-公开
标题翻译：生产非电解电工钢板的工艺
公开(公告)号：WO1989008720A1
公开(公告)日：1989-09-21
申请号：PCT/JP1989000241
申请日：1989-03-07
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1222 , C21D8/1261
摘要： A process for producing nonoriented electric steel sheet having excellent magnetic properties by hot direct rolling, which comprises conducting hot direct rolling of continuously cast slab without heat retention or soaking to convert Al and N into solid solution except for AlN unavoidably precipitated in the hot rolling step, and conducting subsequent annealing of the hot-rolled steel sheet under specified conditions to precipitate uniform and coarse AlN. This process enables highly uniform and good ferrite grains to grow upon recrystallization and annealing.
摘要翻译：一种通过热直接轧制制造具有优异的磁特性的无取向电工钢板的方法，其包括在不进行保温或均热的情况下进行连续铸造的板坯的热直接轧制，以将Al和N转化成在热轧步骤中不可避免地析出的AlN以外的固溶体，并在规定条件下对热轧钢板进行后续的退火，析出均匀且粗大的AlN。该方法使高度均匀且良好的铁素体晶粒在再结晶和退火时生长。

5. 发明申请

WO1989008152A1 PROCESS FOR PRODUCING NONORIENTED ELECTRIC STEEL SHEET HAVING EXCELLENT MAGNETIC PROPERTIES IN LOWLY MAGNETIC FIELD 审中-公开
标题翻译：用于生产在低磁场中具有优异磁性的非电解电工钢板的工艺
公开(公告)号：WO1989008152A1
公开(公告)日：1989-09-08
申请号：PCT/JP1989000233
申请日：1989-03-03
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1272
摘要： A process for producing nonoriented electric steel having excellent magnetic properties in a lowly magnetic field without damaging productivity while effectively depressing the occurence of heat strain in the final annealing and cooling steps, which comprises specifying a special cooling condition in cooling cold-rolled silicon steel sheet after final continuous annealing only for a specified temperature zone exerting detrimental influences on the magnetic properties in a lowly magnetic field to thereby depress the occurence of heat strain.

6. 发明申请

WO1989008151A1 PROCESS FOR PRODUCING NONORIENTED SILICON STEEL SHEET HAVING EXCELLENT MAGNETIC PROPERTIES 审中-公开
标题翻译：生产具有优异磁性的非导电硅钢板的工艺
公开(公告)号：WO1989008151A1
公开(公告)日：1989-09-08
申请号：PCT/JP1989000232
申请日：1989-03-03
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1222 , C21D8/1261
摘要： A process for producing nonoriented silicon steel sheet having excellent magnetic properties by hot direct rolling, which comprises conducting hot direct rolling of continuously cast slab of silicon steel of a specified composition without heat retention or soaking to depress precipitation of AlN except for unavoidably precipitated AlN in the hot rolling step, providing a stand-by time between the rough rolling step and the finish rolling step to introduce nuclei for precipitation of AlN, and annealing the hot-rolled sheet to precipitate uniform and coarse AlN, thus enabling highly uniform and good ferrite grains to grow upon recrystallization and annealing.

7. 发明申请

WO1990012897A1 METHOD OF MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL PLATES WITH EXCELLENT MAGNETIC CHARACTERISTICS 审中-公开
标题翻译：制造具有优良磁特性的非定向电磁钢板的方法
公开(公告)号：WO1990012897A1
公开(公告)日：1990-11-01
申请号：PCT/JP1989000440
申请日：1989-04-26
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1222
摘要： An object of the present invention is to provide a method of manufacturing non-oriented electromagnetic steel plates, which is capable of providing excellent particle growth characteristics of such steel plates in a final annealing step, whereby the excellent magnetic characteristics thereof can be obtained. Accordingly, the present invention is capable of reducing the rate of generation of scale by using a specific steel composition and practicing a low-temperature take-up operation; removing scale completely by practicing a scale removing step after the completion of a hot rolling step; and minimizing the oxidation and nitriding of hot rolled plates during the annealing thereof by annealing a hot rolled plate in a non-oxidizing atmosphere. The heating temperature in the hot rolling step is set high to improve the magnetic characteristics (magnetic flux density) of final products. In order to completely deposit the re-solid-solution AlN particles by this heating operation and agglomerate and bulk the deposit, the hot-rolled plates are subjected to open coil annealing with the annealing conditions controlled suitably.
摘要翻译：用于生产无取向电磁钢板的方法能够在最终退火步骤中提供优异的所述片材的颗粒生长特性，由此获得优异的磁特性。本发明能够通过使用特定的钢成分并进行低温采样操作来降低轧机的生产率; 通过在完成热轧步骤之后执行用于该目的的消除步骤来完全消除这些尺度。在非氧化气氛中进行退火时，热轧板的氧化和氮化最小化。将热轧工序中的加热温度设定得较高，以提高最终产品的磁特性（磁通密度）。为了确保在固体状态下再溶解的AlN颗粒的完全沉积，通过该加热操作，以及凝聚和沉积的扩展，热轧板退火以扩展线圈其条件得到适当控制。

8. 发明申请

WO1990012896A1 METHOD OF MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL PLATES WITH EXCELLENT MAGNETIC CHARACTERISTICS 审中-公开
标题翻译：具有优异磁特性的非导向电磁钢板的制造方法
公开(公告)号：WO1990012896A1
公开(公告)日：1990-11-01
申请号：PCT/JP1989000439
申请日：1989-04-26
申请人： NKK CORPORATION , NISHIMOTO, Akihiko , HOSOYA, Yoshihiro , TOMITA, Kunikazu , URABE, Toshiaki , JITSUKAWA, Masaharu
发明人： NKK CORPORATION
IPC分类号： C21D08/12
CPC分类号： C21D8/1222 , C21D8/1261 , C21D8/1277
摘要： An object of the present invention is to provide a method of manufacturing non-oriented electromagnetic steel plates, which is capable of providing excellent particle growth characteristics of such steel plates in a final annealing step, whereby the excellent magnetic characteristics thereof can be obtained. Accordingly, the present invention is capable of facilitating the agglomeration and bulking of A1N particles in a hot rolled plate annealing step by subjecting the steel plate to low-temperature heating during the hot rolling thereof with a specific steel composition used, and thereby minimizing the re-solid-solution of A1N particles in a slab cooling step; reducing the rate of generation of scale by practicing a low-temperature take-up operation; and removing the scale completely by practicing a scale removing operation after the completion of the hot rolling step. The annealing of a hot rolled plate in a non-oxidizing atmosphere minimizes the oxidation and nitriding of the hot rolled plates during the annealing thereof. The conditions which enable the agglomeration and bulking of A1N particles to be effected in a suitable manner are controlled as required by the magnetic characteristics and cost efficiency of production of the steel plates.

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