公开(公告)号：US4473416A

公开(公告)日：1984-09-25

申请号：US396062

申请日：1982-07-07

申请人： Yakichiro Kawamo ,  Jirou Harase

发明人： Yakichiro Kawamo ,  Jirou Harase

IPC分类号： C21D8/12 ,  H01F1/147 ,  H01F1/04

CPC分类号： C21D8/1222 ,  H01F1/14791 ,  C21D8/1261 ,  C21D8/1272

摘要： A process for producing an aluminum-bearing grain-oriented silicon steel strip from a silicon steel slab containing up to 0.02% carbon, 0.01 to 0.1% aluminum, 2.7 to 4.0% silicon, and 0.002 to 0.02% nitrogen, the balance being iron and unavoidable impurities, said slab optionally containing at least one of 0.01 to 0.5% antimony and 0.01 to 1.0% copper, said process comprising: recrystallization hot rolling said slab, said rolling being commenced when said slab has a temperature up to 1,250.degree. C., and effected at a total reduction rate of at least 80% with a plurality of passes, including at least one pass having a reduction rate of at least 35%, before said steel has a temperature of 900.degree. C.; strain accumulation finish hot rolling said steel at a total reduction rate of at least 40% and at a steel temperature up to 900.degree. C.; annealing said hot rolled steel continuously at a temperature of 700.degree. C. to 950.degree. C.; cold rolling said steel; annealing said cold rolled steel continuously at a temperature of 700.degree. C. to 900.degree. C. for primary recrystallization; and finish annealing said steel, an atmosphere gas containing at least 30% of nitrogen being introduced during the heating step of said finish annealing when a temperature of 800.degree. C. to 1,000.degree. C. prevails.

摘要翻译： 一种从含有高达0.02％碳，0.01％至0.1％铝，2.7％至4.0％硅和0.002％至0.02％氮的硅钢板生产含铝晶粒取向硅钢带的方法，余量为铁和 不可避免的杂质，所述板任选地含有0.01至0.5％的锑和0.01至1.0％的铜中的至少一种，所述方法包括：对所述板进行再结晶热轧，当所述板坯的温度高达1,250℃时开始轧制， 并且在所述钢的温度为900℃之前，以多次通过，总压下率至少为80％，包括至少一次通过率至少为35％。 应变累积热轧所述钢，总压下率至少为40％，钢温度高达900℃。 在700℃〜950℃的温度下连续退火所述热轧钢。 冷轧钢; 在700〜900℃的温度下连续退火冷轧，进行一次再结晶; 并且在800℃〜1000℃的温度下，在所述最终退火的加热工序中，含有至少30％的氮的气氛气体完成退火。

公开(公告)号：US4515644A

公开(公告)日：1985-05-07

申请号：US312848

申请日：1981-10-19

申请人： Tadashi Sawatani ,  Mitsuo Ishii ,  Hirofumi Yoshimura ,  Jirou Harase

发明人： Tadashi Sawatani ,  Mitsuo Ishii ,  Hirofumi Yoshimura ,  Jirou Harase

IPC分类号： C21D9/48 ,  C21D8/04

CPC分类号： C21D8/0405

摘要： The ferritic stainless steel sheet involves a problem that the ridging is likely to generate at the forming step, such as the deep drawing step. The ridging is believed to be caused by a band structure in the hot rolled band, which structure exerting an influence on the formability of a cold rolled sheet. The ridging is prevented in the present invention by means of the combination of the three technical measures: incorporating aluminum into a ferritic stainless steel; heating a slab to a low temperature of 1200.degree. C. or less; and, carrying out a drastic hot rolling of at least one pass with the draft of 20%/pass or more. As a result of these technical measures, the structure of a hot rolled band is made and uniform and thus both the formability and anti-ridging property are enhanced.

摘要翻译： 铁素体系不锈钢板存在在深冲压成形工序中可能产生隆起的问题。 据信这种皱纹是由热轧带中的带状结构引起的，该结构对冷轧板的成形性产生影响。 在本发明中通过三种技术措施的结合防止了脊部：将铝结合到铁素体不锈钢中; 将板坯加热到1200℃以下的低温; 并且进行至少一次通过的剧烈热轧，其中通过量为20％/通过以上。 作为这些技术措施的结果，制成热轧带的结构并且均匀，从而增强了成形性和抗皱纹性。

公开(公告)号：US4225366A

公开(公告)日：1980-09-30

申请号：US75673

申请日：1979-09-13

申请人： Jirou Harase ,  Shozaburo Nakashima ,  Yasukazu Mori

发明人： Jirou Harase ,  Shozaburo Nakashima ,  Yasukazu Mori

IPC分类号： C22C38/00 ,  C21D1/76 ,  C21D8/12 ,  C21D9/46 ,  H01F1/16 ,  H01F1/04

CPC分类号： C21D9/46 ,  C21D1/76 ,  C21D8/1272

摘要： A grain oriented electrical silicon steel sheet containing aluminium and having an extremely high magnetic flux density, for example, a B8 of 1.90 or more, is produced by a secondary recrystallization annealing operation in which, during the period of elevating the temperature of a reducing atmosphere to a level within a range of from 850.degree. to 950.degree. C., the partial pressure of nitrogen in the reducing atmosphere is limited to 20% or less based on the entire pressure of the reducing atmosphere, and during the period of elevating the temperature of the reducing atmosphere in which the secondary recrystallization is in progress, the partial pressure of nitrogen is maintained at a level of at least 3%.

摘要翻译： 通过二次再结晶退火操作制造含有铝的具有极高磁通密度的例如B8为1.90以上的晶粒取向电工硅钢板，其中在提高还原气氛的温度期间 在850〜950℃的范围内，还原气氛中的氮分压基于还原气氛的整个压力被限制在20％以下，在升温期间 的继续二次再结晶的还原气氛中，氮的分压保持在3％以上的水平。

公开(公告)号：US4394188A

公开(公告)日：1983-07-19

申请号：US290713

申请日：1981-08-06

申请人： Jirou Harase ,  Tadashi Nakayama

发明人： Jirou Harase ,  Tadashi Nakayama

IPC分类号： C21D9/46 ,  C21D8/04 ,  C22C38/00

CPC分类号： C21D8/0405

摘要： Process for producing a ferrite stainless steel having excellent workability, comprising hot rolling a ferrite stainless steel slab with a total reduction of at least 80% in a temperature range of from 1150.degree. C. to 900.degree. C. at the central portion of the slab thickness, and, without annealing the hot rolled sheet, cold rolling the hot rolled sheet by a single step into a final thickness.

摘要翻译： 制造具有优异加工性的铁素体不锈钢的方法，包括在板坯的中心部分在1150℃至900℃的温度范围内热轧总共至少80％的铁素体不锈钢板坯 厚度，并且在不对热轧板进行退火的情况下，通过一步将热轧板冷轧成最终厚度。

公开(公告)号：US4302257A

公开(公告)日：1981-11-24

申请号：US166112

申请日：1980-07-07

申请人： Fumio Matsumoto ,  Jirou Harase ,  Kunihide Takashima ,  Hisanobu Nakayama

发明人： Fumio Matsumoto ,  Jirou Harase ,  Kunihide Takashima ,  Hisanobu Nakayama

IPC分类号： B21B1/26 ,  C21D8/12 ,  H01F1/16 ,  H01F1/04

CPC分类号： C21D8/1222

摘要： Process for producing a grain-oriented silicon steel sheet from silicon steel slabs, particularly from continuously cast steel slabs, comprising at least one recrystallization rolling at high reduction rate in a temperature range from 1190.degree. C. to 960.degree. C. in the hot rolling step. The process of the present invention is very effective in preventing the streaks of smaller, poorly oriented grains very often seen in the final product produced from silicon steel slabs.

摘要翻译： 由特别是连续铸钢板的硅钢板生产晶粒取向硅钢板的方法，该方法包括在热轧中在1190℃至960℃的温度范围内以高还原率进行的至少一次再结晶轧制 步。 本发明的方法非常有效地防止了在由硅钢板生产的最终产品中经常看到的较小的较差取向晶粒的条纹。