JP2007238984A - 磁気特性が極めて優れた方向性電磁鋼板の製造方法 - Google Patents
磁気特性が極めて優れた方向性電磁鋼板の製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Abstract
【解決手段】一次再結晶焼鈍時の水蒸気分圧と温度を810〜890℃で60〜180秒間均熱し、その雰囲気のPH2O/PH2を0.30〜0.70とし、引き続く後半部の温度条件を850〜900℃で5〜30秒間、その雰囲気のPH2O/PH2を0.20以下の2段とし、その後窒化し、二次再結晶焼鈍前の鋼板酸素が板厚0.30mm換算酸素で450ppm以上700ppm以下とし、引き続く二次再結晶焼鈍においてコイル外周部最熱点の温度が室温から950℃までの間の雰囲気を窒素25〜75%、残部水素、PH2O/PH2を0.01〜0.15とする磁気特性とグラス皮膜が優れた方向性電磁鋼板の製造方法。
【選択図】なし
Description
Clmin.=−0.04×水和+0.06:(%)
0.5%≦水和≦2.0(%)
0.020%≦塩素≦0.080%
Clmax.=−0.04×水和+0.1 :(%)
Clmin.=−0.04×水和+0.06:(%)
0.5%≦水和≦2.0(%)
0.020%≦塩素≦0.080%
とすると、フォルステライト形成反応がコイル全体で過不足無く生じ、磁気特性も優れグラス皮膜との両立が可能となった。
C:0.068%、Si:3.35%、酸可溶性Al:0.0260%、N:0.0046%、Mn:0.045%、S:0.014%、Sn:0.15%,Cu:0.09%、Ti:0.0020の溶鋼を通常の方法で鋳込み、スラブ加熱温度1310℃で完全にインヒビター物質を固溶させ、熱間圧延後急冷して2.2mm熱間圧延鋼帯を得た。AlNの析出割合は10%以下であった。その後1120℃×10秒焼鈍後900℃に2分間保定し750℃から水冷した。酸洗後、250℃の3回の時効処理を含むリバース冷間圧延機で0.220mmに圧延した。その後、脱脂して850℃で110秒間の一次再結晶・脱炭焼鈍をN2:25%、H2:75%で、引き続いて後半焼鈍を、焼鈍なし、875℃×15秒の焼鈍とし、その条件として酸素を板厚0.30mm換算で400〜850ppmとし、その後、窒化後窒素が0.0190〜0.021%となるようにストリップ走行中でアンモニア雰囲気で窒化した。焼鈍分離剤の水和水分とその中への塩素添加量をそれぞれ、0.04%,水和水分を1.5%焼鈍分離剤を塗布した。その後、二次再結晶焼鈍を1200℃まで15℃/時間で昇温を各条件で行い、1200℃20時間のH2:100%で純化処理を行い冷却した。その後通常用いられる絶縁張力コーティング塗布と平坦化処理を行った。その結果を表2に示した。ここで、グラス皮膜欠陥率は2.0%以下を、磁束密度B8(T)は、1.940T以上を良好とした。
実施例1の冷間圧延素材を用いて脱炭焼鈍の後半のPH2O/PH2を0.008〜0.30とし、板厚0.30mm換算酸素550〜650ppmとし、窒化後窒素を0.0190%〜0.0215%とした。その後、塩素含有量を0.045%、水和水分1.0%の焼鈍分離剤を塗布した。その後、水素50%、窒素50%雰囲気で1200℃まで15℃/時間で昇温する通常の二次再結晶焼鈍を施した。その二次再結晶焼鈍の最熱点のPH2O/PH2を0.0002〜0.17とした。この結果のグラス皮膜欠陥率を図1に示す。図1から分かるように本発明の効果が認められる。図1の右の破線の中は皮膜欠陥率は良好なるも磁束密度が低位であった。
C:0.065%、Si:3.30%、酸可溶性Al:0.0265%、N:0.0045%、Mn:0.047%、S:0.014%、Sn:0.10%,Cu:0.05%,Ti:0.0018%の溶鋼を通常の方法で鋳込み、スラブ加熱温度1300℃で完全にインヒビター物質を固溶させ、熱間圧延後急冷して2.3mm熱間圧延鋼帯を得た。AlNの析出割合はすべて10%以下であった。その後1120℃×10秒の焼鈍後900℃に2分間保定し750℃まで空冷して水冷した。酸洗後、250℃の3回の時効処理を含むリバース冷間圧延機で0.285mmに圧延した。その後、脱脂して850℃で150秒間の一次再結晶・脱炭焼鈍をN2:25%、H2:75%、露点65℃(PH20/PH2:0.437)、引き続いて875℃×15秒、露点36℃(PH2O/PH2:0.08)として焼鈍し、酸素を板厚0.30mm換算で600〜650ppmとしてその後窒化後窒素が0.0190〜0.0210%となるようにストリップ走行中でアンモニア雰囲気で窒化した。焼鈍分離剤の水和水分とその中への塩素添加量をそれぞれ、0.04%〜2.2%、0.01%〜0.09%として塗布した。その後、950℃まで窒素50%残部水素の雰囲気でPH2O/PH2:0.13とし、その後H2:75%、PH2O/PH2:0.005として1200℃まで15℃/時間で昇温した。その後、H2:100%で純化処理を行い冷却した。その後、通常用いられる絶縁張力コーティング塗布と平坦化処理を行った。図2にこの場合のグラス皮膜欠陥率を記す。このように塩素と水和水分の調整で皮膜欠陥率が極めて良好になる。因みにこれらの磁気特性は、磁束密度(B8:1.940〜1.965T)で鉄損(W17/50:0.920〜0.965W/kg)で、磁気特性も良好であった。
Claims (8)
- 質量%で、C:0.025〜0.09%、Si:2.5〜4.0%、酸可溶性Al:0.022〜0.033%、N:0.003〜0.006%、SとSeをSeq(S当量)=S+0.405Se として Seq=0.008〜0.018%、Mn:0.03〜0.10%、Ti≦0.005%、残部がFe及び不可避的不純物からなるスラブを1280℃以上のインヒビター物質の固溶温度以上で再加熱し、熱間圧延を施して熱間圧延鋼帯とし、この熱間圧延鋼帯に含有されるNのうちAlNとしての析出率を20%以下とし、この熱延鋼帯を焼鈍しもしくは焼鈍せず、引き続き1回もしくは中間焼鈍を挟む2回以上の冷間圧延を行って最終板厚とするが、最終冷間圧延前に1回以上の熱処理を施し、最終冷間圧延の圧延率を83%〜92%とし、脱炭焼鈍後の一次再結晶粒の円相当の平均粒径(直径)を7μm以上〜18μm未満とし、ストリップ走行状態下で水素、窒素及びアンモニアの混合ガス中の窒化処理で全窒素含有量を0.015〜0.024%として、その後MgOを主成分とする焼鈍分離剤を塗布して最終仕上げ焼鈍を施す方向性電磁鋼板の製造において、窒化前の脱炭焼鈍工程の前半部の温度を810℃〜890℃で60秒〜180秒間均熱し、その雰囲気のPH2O/PH2を0.30〜0.70とし、引き続く後半部の温度条件を850〜900℃で5秒〜30秒間、その雰囲気のPH2O/PH2を0.20以下とし、その後窒化し、二次再結晶焼鈍前の鋼板酸素が板厚0.30mm換算酸素(So)で450ppm以上700ppm以下とし、MgOを主成分とする焼鈍分離剤を塗布し、引き続く二次再結晶焼鈍においてコイル外周部最熱点の温度が室温から950℃までの間の雰囲気を窒素25%〜75%、残部水素、PH2O/PH2を0.01〜0.15とすることを特徴とする磁束密度が極めて優れた方向性電磁鋼板の製造方法。
ここで、板厚0.30mm換算酸素(So)とは、鋼板実厚(tmm)の場合、実酸素分析値(S:ppm)にt/0.30を掛けた数値を言い、So(ppm)=S×t/0.30 である。 - 二次再結晶焼鈍時の最熱点が950℃以上でPH2O/PH2≦0.01であることを特徴とする請求項1記載の磁束密度が極めて優れた方向性電磁鋼板の製造方法。
- 質量%で、Cuを0.05〜0.30%含むことを特徴とする請求項1または2に記載の磁束密度が極めて優れた方向性電磁鋼板の製造方法。
- 前記スラブの成分として、更に、質量%で、Sn、Sb、Pの少なくとも1種を0.02〜0.30%含有することを特徴とする請求項1〜3のいずれかの項に記載の磁束密度が極めて優れた方向性電磁鋼板およびその製造方法。
- 前記スラブの成分として、更に、質量%で、Crを0.02〜0.30%含有することを特徴とする請求項1〜4のいずれかの項に記載の磁束密度が極めて優れた方向性電磁鋼板の製造方法。
- MgOを主成分とする焼鈍分離剤の水和水分を2.0%以下とすることを特徴とする請求項1〜5のいずれかの項に記載の磁束密度が極めて優れた方向性電磁鋼板の製造方法。
- MgOを主成分とする焼鈍分離剤へ塩素化合物を総塩素含有量を0.020%〜0.080%となるように添加することを特徴とする請求項1〜6のいずれかの項に記載の磁束密度が極めて優れた方向性電磁鋼板の製造方法。
- MgOを主成分とする焼鈍分離剤の水和水分とCl含有量の関係が次の式を満たすことを特徴とする請求項1〜5のいずれかの項に記載の磁束密度が極めて高い方向性電磁鋼板の製造方法。
Clmax.=−0.04×水和+0.1 :(%)
Clmin.=−0.04×水和+0.06:(%)
0.5%≦水和≦2.0(%)
0.020%≦塩素≦0.080%
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KR101309410B1 (ko) | 2008-09-10 | 2013-09-23 | 신닛테츠스미킨 카부시키카이샤 | 방향성 전자기 강판의 제조 방법 |
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WO2021156960A1 (ja) * | 2020-02-05 | 2021-08-12 | 日本製鉄株式会社 | 方向性電磁鋼板 |
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US20090032142A1 (en) | 2009-02-05 |
CN101395284A (zh) | 2009-03-25 |
US7833360B2 (en) | 2010-11-16 |
CN101395284B (zh) | 2011-01-26 |
RU2378393C1 (ru) | 2010-01-10 |
EP1992708B1 (en) | 2018-03-07 |
KR101060745B1 (ko) | 2011-08-31 |
WO2007102282A1 (ja) | 2007-09-13 |
KR20080100245A (ko) | 2008-11-14 |
JP4823719B2 (ja) | 2011-11-24 |
EP1992708A4 (en) | 2012-03-21 |
EP1992708A1 (en) | 2008-11-19 |
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