公开(公告)号：JP2013187480A

公开(公告)日：2013-09-19

申请号：JP2012053335

申请日：2012-03-09

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TAKASHITA TAKUYA ,  NAKAMURA NAOMICHI

IPC: H01F1/24 ,  B22F1/00 ,  B22F1/02 ,  H01F1/26

Abstract: PROBLEM TO BE SOLVED: To provide a powder for dust magnetic core having excellent compressibility and exhibiting low iron loss after molding.SOLUTION: In the powder, mass ratio of 150-75 μm is highest, mass ratio of 300-150 μm is next, mass ratio of less than 75 μm is lowest, and apparent density of the powder is 3.5 g/cmor more. Furthermore, average crystal grain diameter in the powder is 50 μm or more, for an arbitrary powder of 40 pieces or more.

Abstract translation: 要解决的问题：为了提供压缩性优异，成型后铁损低的粉尘磁心粉末。解决方案：在粉末中，质量比为150-75μm最高，质量比为300-150μm， 小于75μm的质量比最低，粉末的表观密度为3.5g / cm 3以上。 此外，粉末中的平均晶粒直径为40μm以上的任意粉末的50μm以上。

公开(公告)号：JP2012162773A

公开(公告)日：2012-08-30

申请号：JP2011024633

申请日：2011-02-08

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TAKAMIYA TOSHITO ,  TAKENAKA MASANORI ,  TAKASHITA TAKUYA ,  TAKASHIMA MINORU

IPC: C21D8/12 ,  C22C38/00 ,  C22C38/60

CPC classification number: Y02P10/212

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a grain-oriented electrical steel sheet by which the existing shape of C before cold rolling is optimized and an excellent magnetic characteristic can stably be obtained after applying secondary recrystallization annealing.SOLUTION: The method for manufacturing the grain-oriented electrical steel sheet is performed as follows: after reheating a steel material containing, by mass%, 0.005 to 0.15% C, 2.5 to 7.0% Si, 0.005 to 0.3% Mn, 0.01 to 0.05% sol.Al, 0.002 to 0.012% N and 0.005 to 0.05% by the total of one or two kinds among S and Se, hot rolling is applied, a winding temperature is brought into a range of 760 to 460°C to generate an oxide mainly comprising FeOon the surface of a steel sheet, and then after heated to ≥800°C under an oxidizing atmosphere, cooling is performed at 10 to 100°C/s average cooling speed up to a cooling stop temperature from 800°C to 350-200°C, and then hot rolling steel sheet annealing is applied so that cooling is gradually performed at ≤5°C/s cooling speed from the cooling stop temperature for 40 to 200 s.

Abstract translation: 解决问题的方案：提供一种制造方向性电磁钢板的方法，其中在冷轧后C的现有形状被优化，并且在进行二次再结晶退火之后可以稳定地获得优异的磁特性。 解决方案：晶粒取向电工钢板的制造方法如下进行：将以质量％计含有0.005〜0.15％的C，2.5〜7.0％的Si，0.005〜0.3％的Mn， 在S和Se中，0.01〜0.05％的溶胶，0.002〜0.012％的N和0.005〜0.05％的总和为1〜2种，进行热轧，卷绕温度为760〜460℃ 在钢板表面产生主要包含Fe 3 O 4 的氧化物，然后加热至≥800° 在10〜100℃/ s的平均冷却速度下进行冷却至800〜350〜200℃的冷却停止温度，然后进行热轧钢板退火，冷却为 在冷却停止温度下以≤5℃/ s的速度逐渐进行40秒至200秒。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2012102344A

公开(公告)日：2012-05-31

申请号：JP2010249052

申请日：2010-11-05

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： IMAMURA TAKESHI ,  MURAKI MINEO ,  ARAGAKI YUKIHIRO ,  TAKASHITA TAKUYA

IPC: C22C38/00 ,  C21D8/12 ,  C22C38/14 ,  C22C38/60 ,  H01F1/16

Abstract: PROBLEM TO BE SOLVED: To provide a steel sheet capable of being reduced in deterioration of magnetic properties after being sheared even when the electromagnetic steel sheet has a thickness of 0.220 mm or less, in the electromagnetic steel sheet used for a large transformer of a size as large as several meters.SOLUTION: The electromagnetic steel sheet has a composition containing, by mass, 0.005% or less C, 1.0-8.0% Si, and 0.005-1.0% Mn, further 10-50 mass ppm, in total, of one or more elements selected from among Nb, Ta, V and Zr, with the balance consisting of Fe and inevitable impurities, and is characterized in that at least 10% of each content of the Nb Ta, V and Zr is present in a precipitated state, the precipitated objects have diameters (circle-equivalent diameters) of 0.02-3 μm on the average, the number of intervening objects having diameters of 10 μm or more is less than 1 piece/mm, and the average grain diameter of the secondary recrystallization grains in the steel sheet is 5 mm or more.

Abstract translation: 要解决的问题：为了提供即使在电磁钢板的厚度为0.220mm以下的剪切后也能够降低磁特性的劣化的钢板，在用于大型变压器的电磁钢板 尺寸大到几米。 ＆lt; P＆gt;解决方案：电磁钢板具有以下组成：将含有0.005％以下的C，1.0〜8.0％的Si，0.005〜1.0％的Mn，进一步的10〜50质量ppm， 选自Nb，Ta，V和Zr中的元素，余量由Fe和不可避免的杂质组成，其特征在于Nb Ta，V和Zr的每种含量的至少10％以沉淀状态存在， 沉淀物的平均直径（圆当量直径）为0.02-3μm，直径为10μm以上的中间物体的数量少于1片/ mm 2 ，钢板中的二次再结晶晶粒的平均粒径为5mm以上。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2017092255A

公开(公告)日：2017-05-25

申请号：JP2015220645

申请日：2015-11-10

Applicant: Jfeスチール株式会社 ,  Jfe Steel Corp

Inventor： TAKASHITA TAKUYA ,  KOBAYASHI SATOO ,  NAKAMURA NAOMICHI ,  TAKAHASHI TOSHIMITSU ,  TAKEUCHI YOSHITO ,  OKAMOTO DAISUKE ,  SAEGUSA SHINJIRO ,  ISHII KOHEI

IPC: H01F1/20 ,  B22F1/00 ,  B22F1/02 ,  C22C38/00

Abstract: 【課題】従来技術の課題を解消して、渦電流損の低い圧粉磁芯が得られる圧粉磁芯用軟磁性粉末の原料粉末を提供する。【解決手段】γ安定化元素、Si:1.0〜6.5mass%、およびC:1.0〜2.0mass%を含み、残部Feおよび不可避的不純物からなる粉末とする。【選択図】なし

公开(公告)号：JP2013187481A

公开(公告)日：2013-09-19

申请号：JP2012053341

申请日：2012-03-09

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TAKASHITA TAKUYA ,  NAKAMURA NAOMICHI

IPC: H01F41/02 ,  B22F1/00 ,  B22F1/02 ,  B22F3/00 ,  B22F3/02 ,  H01F1/26 ,  H01F27/255

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a powder-compact magnetic core with a high green density and a low iron loss.SOLUTION: The method comprises: mixing pure iron powder having an average particle diameter of 63-150 μm with a silicone resin, followed by heating at a temperature of 100-200°C provided that when the pure iron powder has an apparent density larger than 4.0 g/cmbelow 4.2 g/cm, the amount of the mixed silicone resin is 0.1-0.2 mass%, and when the pure iron powder has an apparent density of 4.2 g/cmor larger, the amount of the mixed silicone resin is 0.05-0.2 mass%; and compacting the mixture, followed by heating at a temperature of 650°C or higher.

Abstract translation: 要解决的问题：提供一种具有高生密度和低铁损的粉末 - 致密磁芯的制造方法。溶液：该方法包括：将平均粒径为63-150微米的纯铁粉与 硅树脂，然后在100-200℃的温度下加热，条件是当纯铁粉末的表观密度大于4.0g / cmbe以下4.2g / cm 2时，混合有机硅树脂的量为0.1-0.2质量％ 当纯铁粉的表观密度为4.2g / cm 3以上时，混合有机硅树脂的含量为0.05〜0.2质量％。 并将混合物压实，然后在650℃或更高的温度下加热。

公开(公告)号：JP2014103267A

公开(公告)日：2014-06-05

申请号：JP2012254490

申请日：2012-11-20

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TAKASHITA TAKUYA ,  NAKAMURA NAOMICHI

IPC: H01F41/02 ,  B22F1/00 ,  B22F1/02 ,  C22C33/02 ,  C22C38/00 ,  H01F1/24

Abstract: PROBLEM TO BE SOLVED: To provide a method of producing powder for dust core which can give the characteristics of high magnetic flux density and low iron loss to a dust core molded.SOLUTION: A method of producing powder for dust core includes a step for obtaining ferrous soft magnetic powder by atomization, a reduction heat treatment step for heat treating the ferrous soft magnetic powder in a hydrogen atmosphere of 950°C or more, a pulverization step for performing pulverization after the reduction heat treatment step, a crushing step for crushing the powder passed through the pulverization step by giving a shear force with a body of rotation, a strain relief step for performing strain relief at a temperature of 500°C or higher and less than 900°C after the crushing step, and a step for applying an insulation coating of 0.05 mass% or more and less than 0.3 mass% of the powder mass on the surface of the powder after the strain relief step. The crushing step is carried out under conditions that the product of the peripheral velocity (m/s) of the body of rotation and the crushing time (s) is 1000-22000 m.

Abstract translation: 要解决的问题：提供一种粉尘芯的粉末的制造方法，其能够赋予成型的压粉芯具有高的磁通密度和低的铁损的特性。解决方案：一种制备粉尘芯的粉末的方法包括获得 通过雾化的亚铁软磁性粉末，在950℃以上的氢气气氛中对亚铁软磁性粉末进行热处理的还原热处理工序，在还原热处理工序后进行粉碎的粉碎工序，粉碎工序 通过赋予旋转体剪切力通过粉碎步骤的粉末，在破碎步骤后在500℃以上且小于900℃的温度下进行应变消除的应变消除步骤，以及施加步骤 在应变消除工序之后的粉末表面的粉末质量为0.05质量％以上且小于0.3质量％的绝缘涂层。 破碎步骤在旋转体的圆周速度（m / s）与破碎时间（s）为1000〜2200m的条件下进行。

公开(公告)号：JP2013139629A

公开(公告)日：2013-07-18

申请号：JP2012266887

申请日：2012-12-06

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TAKENAKA MASANORI ,  TAKASHITA TAKUYA ,  HANAZAWA KAZUHIRO ,  TAKAMIYA TOSHITO

IPC: C21D8/12 ,  B21B1/22 ,  B21B3/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  H01F1/16

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a grain-oriented magnetic steel sheet which prevents deterioration in integrating degree in Goss orientation of a secondary recrystallized grain in an Al-containing grain-oriented magnetic steel sheet to produce a grain-oriented magnetic steel sheet excellent in magnetic property.SOLUTION: The method for producing a grain-oriented magnetic steel sheet containing 0.01-0.05 mass% sol. Al, includes: a hot-rolled sheet annealing where a steel slab is subjected to annealing at 800°C or higher, and then cooled at a cooling rate of 45°C/s or more while the steel slab has a temperature between 750°C and a cooling end temperature of 200-300°C; a first cold rolling where the steel slab is subjected to cold rolling more than 1 pass to achieve a total reduction of 30-50%, and then to a final pass using a roll with 200 mmφ or more with an initial biting temperature of 100°C or lower; and a second cold rolling after an intermediate annealing, where the steel slab is subjected to cold rolling more than 2 passes to achieve a total reduction of 80-95% while being subjected to an interpass aging at 200-300°C at least during 1 pass.

Abstract translation: 要解决的问题：提供一种用于制造晶粒取向电磁钢板的方法，其防止含Al取向电磁钢板中的二次再结晶晶粒的Goss取向积分度的劣化，以产生晶粒取向磁性 磁性优异的钢板。解决方案：含有0.01-0.05质量％溶胶的晶粒取向电磁钢板的制造方法。 Al包括：对钢坯进行800℃以上退火，然后以45℃/ s以上的冷却速度进行冷却的热轧板退火，而钢坯的温度为750℃以下 C，冷却终止温度为200-300℃; 第一次冷轧，其中钢坯经受超过1次的冷轧，总共减少30-50％，然后使用200mm＆amp; 或更高，初始咬合温度为100℃或更低; 在中间退火之后进行第二次冷轧，其中钢坯经受2次以上的冷轧，总共减少80-95％，同时在200-300℃下进行至少1次的中间退火 通过。

公开(公告)号：JP2012184497A

公开(公告)日：2012-09-27

申请号：JP2011174949

申请日：2011-08-10

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： ARAGAKI YUKIHIRO ,  OKUBO TOMOYUKI ,  TAKASHITA TAKUYA

IPC: C21D8/12 ,  B21B3/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/60 ,  H01F1/16

Abstract: PROBLEM TO BE SOLVED: To propose a novel method for producing a grain-oriented electromagnetic steel sheet by which texture modification effect same as that of warm rolling can be attained.SOLUTION: Steel slab containing 0.01-0.10 mass% C, 2.0-4.5 mass% Si and 0.01-0.5 mass% Mn is hot-rolled to produce a hot-rolled plate, and the hot-rolled plate is annealed. Then, the hot-rolled plate is rolled at rolling-reduction ratio of 85% or more by one-time cold rolling, or it is rolled at rolling-reduction ratio of 80% or more by finish cold rolling comprising two or more times cold rolling with intermediate annealing, to produce a cold-rolled plate having a final plate thickness. The cold-rolled plate is subjected to primary recrystallize-annealing and secondary recrystallize-annealing to obtain the grain-oriented electromagnetic steel sheet. In the method for producing the grain-oriented electromagnetic steel sheet, low strain rate cold rolling of 150sor less in strain rate is conducted at least one pass or more in a step of the cold rolling in which a total rolling reduction is 50% or less.

Abstract translation: 解决问题的方案：提出一种可以获得与温轧相同的织构修饰效果的方向性电磁钢板的制造方法。

解决方案：将含有0.01-0.10质量％C，2.0-4.5质量％Si和0.01-0.5质量％Mn的钢板热轧制成热轧板，并对该热轧板进行退火。 然后，通过一次冷轧，以85％以上的轧制减量率轧制热轧板，或者通过包含2次以上的冷轧的精冷轧以80％以上的轧制减速比进行轧制 用中间退火进行轧制，制造具有最终板厚度的冷轧板。 对冷轧板进行一次再结晶退火和二次再结晶退火，得到晶粒取向电磁钢板。 在晶粒取向电磁钢板的制造方法中，应变速率的150s以下的低应变率冷轧进行至少一次以上的步骤 的总压下率为50％以下的冷轧。 版权所有（C）2012，JPO＆INPIT