JPWO2011102328A1 - 無方向性電磁鋼板及びその製造方法 - Google Patents
無方向性電磁鋼板及びその製造方法 Download PDFInfo
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Abstract
Description
前記地鉄の表面上に形成された1g/m2以上6g/m2以下の応力付与型の絶縁被膜と、
を有し、
前記地鉄は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記地鉄のCの含有量が0.005質量%以下であり、
前記地鉄の残部がFe及び不可避的不純物からなり、
前記地鉄の表面に、Si、Al及びCrからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の酸化物層が形成されていることを特徴とする無方向性電磁鋼板。
前記冷延鋼帯の表面に1g/m2以上6g/m2以下の張力付与型の絶縁被膜を形成する工程と、
を有し、
前記冷延鋼帯は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記冷延鋼帯のCの含有量が0.005質量%以下であり、
前記冷延鋼帯の残部がFe及び不可避的不純物からなり、
前記仕上げ焼鈍を行う工程は、前記冷延鋼帯のSi及びAlの総含有量をX(質量%)と表したときに、水素に対する水蒸気の分圧比が0.005×X2以下となる雰囲気中で前記冷延鋼帯の温度を800℃以上1100℃以下として、前記冷延鋼帯の表面に、Si及びAlからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の酸化物層を形成する工程を有することを特徴とする無方向性電磁鋼板の製造方法。
前記冷延鋼帯の表面に塗布液を塗布する工程と、
前記冷延鋼帯の温度を800℃以上1100℃以下として前記塗布液の焼き付けを行う工程と、
を有することを特徴とする(5)に記載の無方向性電磁鋼板の製造方法。
前記仕上げ焼鈍を行う工程の前に前記冷延鋼帯の表面に塗布液を塗布する工程と、
前記仕上げ焼鈍の際に前記塗布液の焼き付けを行う工程と、
を有することを特徴とする(5)に記載の無方向性電磁鋼板の製造方法。
先ず、表2に示す種々の成分を含有し、残部がFe及び不可避的不純物の鋼スラブ(鋼No.1〜No.7)を熱間圧延して厚さが2.5mmの熱延鋼帯を作製した。次いで、900℃で1分間の熱延鋼帯の焼鈍(熱延板焼鈍)を行った。その後、酸洗し、冷間圧延を行って厚さが0.35mmの冷延鋼帯を作製した。
表2に示す鋼No.1、No.3及びNo.4の鋼スラブを熱間圧延して厚さが2.5mmの熱延鋼帯を作製した。次いで、900℃で1分間の熱延鋼帯の焼鈍(熱延板焼鈍)を行った。その後、酸洗し、冷間圧延を行って厚さが0.35mmの冷延鋼帯を作製した。
前記地鉄の表面上に形成された1g/m2以上6g/m2以下の応力付与型の絶縁被膜と、
を有し、
前記地鉄は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記地鉄のCの含有量が0.005質量%以下であり、
前記地鉄の残部がFe及び不可避的不純物からなり、
前記地鉄の表面に、Si、Al及びCrからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の外部酸化膜が形成されていることを特徴とする無方向性電磁鋼板。
前記冷延鋼帯の表面に1g/m2以上6g/m2以下の張力付与型の絶縁被膜を形成する工程と、
を有し、
前記冷延鋼帯は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記冷延鋼帯のCの含有量が0.005質量%以下であり、
前記冷延鋼帯の残部がFe及び不可避的不純物からなり、
前記仕上げ焼鈍を行う工程は、前記冷延鋼帯のSi及びAlの総含有量をX(質量%)と表したときに、水素に対する水蒸気の分圧比が0.005×X2以下となる雰囲気中で前記冷延鋼帯の温度を800℃以上1100℃以下として、前記冷延鋼帯の表面に、Si及びAlからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の外部酸化膜を形成する工程を有することを特徴とする無方向性電磁鋼板の製造方法。
Claims (20)
- 地鉄と、
前記地鉄の表面上に形成された1g/m2以上6g/m2以下の応力付与型の絶縁被膜と、
を有し、
前記地鉄は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記地鉄のCの含有量が0.005質量%以下であり、
前記地鉄の残部がFe及び不可避的不純物からなり、
前記地鉄の表面に、Si、Al及びCrからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の酸化物層が形成されていることを特徴とする無方向性電磁鋼板。 - 前記地鉄のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記絶縁被膜が、リン酸塩及びコロイダルシリカを含む塗布液の焼き付けにより形成されていることを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記絶縁被膜が、ほう酸及びアルミナゾルを含む塗布液の焼き付けにより形成されていることを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記絶縁被膜が、リン酸塩及びコロイダルシリカを含む塗布液の焼き付けにより形成されていることを特徴とする請求項2に記載の無方向性電磁鋼板。
- 前記絶縁被膜が、ほう酸及びアルミナゾルを含む塗布液の焼き付けにより形成されていることを特徴とする請求項2に記載の無方向性電磁鋼板。
- 冷延鋼帯の仕上げ焼鈍を行う工程と、
前記冷延鋼帯の表面に1g/m2以上6g/m2以下の張力付与型の絶縁被膜を形成する工程と、
を有し、
前記冷延鋼帯は、
Si、Al及びCr:総含有量で2質量%以上6質量%以下、及び
Mn:0.1質量%以上1.5質量%以下、
を含有し、
前記冷延鋼帯のCの含有量が0.005質量%以下であり、
前記冷延鋼帯の残部がFe及び不可避的不純物からなり、
前記仕上げ焼鈍を行う工程は、前記冷延鋼帯のSi及びAlの総含有量をX(質量%)と表したときに、水素に対する水蒸気の分圧比が0.005×X2以下となる雰囲気中で前記冷延鋼帯の温度を800℃以上1100℃以下として、前記冷延鋼帯の表面に、Si及びAlからなる群から選択された少なくとも一種の酸化物を含有し、厚さが0.01μm以上0.5μm以下の酸化物層を形成する工程を有することを特徴とする無方向性電磁鋼板の製造方法。 - 前記絶縁被膜を形成する工程は、前記仕上げ焼鈍を行う工程の後に、
前記冷延鋼帯の表面に塗布液を塗布する工程と、
前記冷延鋼帯の温度を800℃以上1100℃以下として前記塗布液の焼き付けを行う工程と、
を有することを特徴とする請求項7に記載の無方向性電磁鋼板の製造方法。 - 前記塗布液は、リン酸塩及びコロイダルシリカを含むことを特徴とする請求項8に記載の無方向性電磁鋼板の製造方法。
- 前記塗布液は、ほう酸及びアルミナゾルを含むことを特徴とする請求項8に記載の無方向性電磁鋼板の製造方法。
- 前記絶縁被膜を形成する工程は、
前記仕上げ焼鈍を行う工程の前に前記冷延鋼帯の表面に塗布液を塗布する工程と、
前記仕上げ焼鈍の際に前記塗布液の焼き付けを行う工程と、
を有することを特徴とする請求項7に記載の無方向性電磁鋼板の製造方法。 - 前記塗布液は、リン酸塩及びコロイダルシリカを含むことを特徴とする請求項11に記載の無方向性電磁鋼板の製造方法。
- 前記塗布液は、ほう酸及びアルミナゾルを含むことを特徴とする請求項11に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項7に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項8に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項9に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項10に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項11に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項12に記載の無方向性電磁鋼板の製造方法。
- 前記冷延鋼帯のAl及びCrの総含有量が0.8質量%以上であることを特徴とする請求項13に記載の無方向性電磁鋼板の製造方法。
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