公开(公告)号：US4014717A

公开(公告)日：1977-03-29

申请号：US613956

申请日：1975-09-16

申请人： Mario Barisoni ,  Massimo Barteri ,  Roberto Ricci Bitti ,  Pietro Brozzo ,  Edmondo Marianeschi

发明人： Mario Barisoni ,  Massimo Barteri ,  Roberto Ricci Bitti ,  Pietro Brozzo ,  Edmondo Marianeschi

IPC分类号： H01F1/16 ,  C21D8/12 ,  C22C38/02 ,  H01F1/04

CPC分类号： C22C38/02 ,  C21D8/1205 ,  C21D8/1261 ,  C21D8/1233

摘要： A process for the production of oriented-grain high magnetic permeability steel sheet including the steps of continuously casting a steel slab haing a weight % composition within the range of 2.5-3.5 Si, 0.01-0.04 S, less than 0.07 C, less than 0.15 Mn, and an acid-soluble aluminum in an amount between 0.01 and 0.05, at a feed rate ranging from 700 to 1000 kg/minute, into an ingot mold of a length over 1200 mm and cooling it in said ingot mold with a quantity of water ranging from 2.8 to 4 m.sup.3 per ton of steel; heating the slab so obtained to 1300.degree.-1400.degree. C and immediately thereafter hot-rolling it to a thickness in the range between 2 and 3.1 mm, annealing the strip so obtained at a temperature in the range between 1050.degree. and 1150.degree. C, keeping it at this temperature for a duration between 5 and 30 seconds; cooling it at any desired cooling rate to 750.degree.-850.degree. C at a temperature at which austenite is still present in it; keeping the strip at this temperature for a duration ranging from 30 to 200 seconds; and finally quenching it from the initial quenching temperature of 400.degree. C at a cooling rate of between 10.degree. C/second and 100.degree. C/second; cold-rolling the strip so obtained with a reduction rate ranging from 80 to 90% and subjecting it finally to the decarburization and recrystallization annealing operations as well as to other final anneals.

摘要翻译： 一种生产定向晶粒高磁导率钢板的方法，包括以2.5-3.5Si，0.01-0.04S，小于0.07C，小于0.15的范围内连续铸造重量％组成的钢坯的步骤 Mn和0.01〜0.05的酸溶性铝，以700〜1000kg /分钟的速度进料到长度超过1200mm的锭模中，并在所述铸锭模具中用一定量的 每吨钢水2.8〜4立方米; 将得到的板坯加热到1300〜-1400℃，然后将其热轧至2〜3.1mm的厚度，在1050℃〜1150℃的温度范围内退火， 在此温度下保持5至30秒; 在奥氏体还存在的温度下以任意所需的冷却速度将其冷却至750-850℃; 将条带在该温度下保持30至200秒的持续时间; 最终从初始淬火温度400℃以10℃/秒〜100℃/秒的冷却速度淬火; 将所得到的带材以80-90％的压缩率冷轧，最后进行脱碳和再结晶退火操作以及其他最终退火。

公开(公告)号：US3959033A

公开(公告)日：1976-05-25

申请号：US491152

申请日：1974-07-23

申请人： Mario Barisoni ,  Massimo Barteri ,  Pietro Brozzo ,  Edmondo Marianeschi ,  Roberto Ricci Bitti

发明人： Mario Barisoni ,  Massimo Barteri ,  Pietro Brozzo ,  Edmondo Marianeschi ,  Roberto Ricci Bitti

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

CPC分类号： C21D8/1261 ,  C21D8/1233 ,  C21D8/1266 ,  C21D8/1272

摘要： Low carbon silicon-aluminum single-oriented steel sheet having high magnetic induction is produced by hot rolling at 1370.degree.-1430.degree.C., annealing from 10 to 60 seconds at 1050 to 1170.degree.C., slow cooling to 700.degree.-900.degree.C., quenching from 700.degree.-900.degree.C., cold rolling with a reduction in thickness of 80 to 90%, recrystallization and decarburization annealing in wet hydrogen from 780.degree. to 870.degree.C. for 2 minutes, and final annealing at 1200.degree.C. in a mixture of 10-50% hydrogen and 50-90% nitrogen. Cold rolling can be effected in two stages, the first stage to reduce the thickness by 20 to 50% followed by annealing at 700.degree. to 900.degree.C., quenching and final cold rolling with a reduction in thickness of 80 to 90%. The preferred temperature range prior to quenching, for one-step cold rolling, is 750.degree. to 850.degree.C.; and for two-step cold rolling, the first quench is preferably from a temperature of 750.degree. to 850.degree. C. and the second quench preferably from a temperature of 850.degree. to 900.degree.C.

摘要翻译： 具有高磁感应性的低碳硅铝单向钢板通过在1370〜-1430℃下热轧制造，在1050〜1170℃退火10〜60秒，缓慢冷却至700〜-900℃ C.从700℃-900℃淬火，冷轧厚度减少80-90％，在湿氢中从780℃至870℃进行再结晶和脱碳退火2分钟，最终退火1200℃ 在10-50％氢气和50-90％氮气的混合物中。 冷轧可以分两个阶段进行，第一阶段将厚度减少20-50％，然后在700-900℃退火，淬火和最终冷轧，厚度减少80-90％。 淬火前优选的温度范围为一步冷轧，为750〜850℃。 对于两步冷轧，首先骤冷优选为750〜850℃，第二骤冷优选为850〜900℃。

公开(公告)号：US4130447A

公开(公告)日：1978-12-19

申请号：US824611

申请日：1977-08-15

申请人： Edmondo Marianeschi ,  Sandro Basevi ,  Mario Barisoni ,  Paolo Marini ,  Carlo Borgianni ,  Roberto Ricci Bitti

发明人： Edmondo Marianeschi ,  Sandro Basevi ,  Mario Barisoni ,  Paolo Marini ,  Carlo Borgianni ,  Roberto Ricci Bitti

IPC分类号： B23K35/24 ,  C21D1/70

CPC分类号： C21D1/70 ,  C23D5/10 ,  Y10T428/12451

摘要： An annealing separator for use on grain-oriented silicon steel strip comprises a magnesium oxide base composition containing rare earth metal oxides. The rare earth metal oxides are present in an amount of 0.8 to 30% by weight of the composition; but in the lower range of 0.8 to 5% by weight, and preferably up to 7% by weight, the oxides have a particle size of less than 325 mesh, and a fraction of 35-55% by weight smaller than 500 mesh. Alkali metal silicate may be present in an amount 5 to 45% by weight. Strip coated with annealing separator of the invention is characterized in that the coating is almost totally free of surface cavities, in that the denitriding and desulfuring rates are greatly accelerated, in that the surface resistivity of the coating is substantially increased, and in that the coating adheres more strongly to the strip.

摘要翻译： 用于晶粒取向硅钢带的退火分离器包括含有稀土金属氧化物的氧化镁基础组合物。 稀土金属氧化物的含量为组合物重量的0.8〜30％。 但在0.8〜5重量％的范围内，优选为7重量％以下，氧化物的粒径小于325目，35〜55重量％的比例小于500目。 碱金属硅酸盐可以以5-45重量％的量存在。 涂覆有本发明的退火分离器的条带的特征在于，涂层几乎完全没有表面空腔，因为脱氮和脱硫速率大大加快，涂层的表面电阻率显着增加，并且涂层 更强烈地贴在钢带上。