Oriented electrical steel sheet and method for manufacturing same
A technology of electromagnetic steel sheet and manufacturing method, which is applied in the direction of manufacturing tools, circuits, electrical components, etc., can solve problems such as insulation degradation and insulation coating damage, and achieve low energy loss, excellent iron loss characteristics, and excellent space factor Effect
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Embodiment 1
[0086] A steel containing C: 0.065%, Si: 3.4%, and Mn: 0.08% was melted and cast into billets by continuous casting. Next, after heating to 1410°C, it is hot-rolled into a hot-rolled sheet with a thickness of 2.4mm. After annealing the hot-rolled sheet at 1050°C for 60 seconds, it is cold-rolled once to make the intermediate sheet thickness 1.8mm. After performing intermediate annealing for 80 seconds, it was made into the cold-rolled sheet whose final sheet|seat thickness was 0.23 mm by 200 degreeC warm rolling. Next, in the oxidatively wet H 2 -N 2 Decarburization annealing which doubles as primary recrystallization annealing was performed at 820° C. for 80 seconds in an atmosphere. Then, the surface of the steel plate is coated with MgO as the main body, and Cr is added in various changes within the range of 0 to 40%. 2 o 3 The annealing separation agent, after drying, implements secondary recrystallization annealing including changing the time spent heating between 950...
Embodiment 2
[0093] A steel containing C: 0.070%, Si: 3.2%, and Mn: 0.1% was melted and cast into billets by continuous casting. Next, after heating to 1410°C, it is hot-rolled into a hot-rolled sheet with a thickness of 2.4mm, and after annealing the hot-rolled sheet at 1050°C for 60 seconds, it is cold-rolled once to make the intermediate sheet thickness 1.9mm, and then rolled at 1120°C. After performing intermediate annealing for 80 seconds, it was made into the cold-rolled sheet whose final sheet|seat thickness was 0.23 mm by 200 degreeC warm rolling. Next, in the oxidatively wet H 2 -N 2 Decarburization annealing, which doubles as primary recrystallization annealing, was performed at 840° C. for 100 seconds in an atmosphere. Then, the surface of the steel plate is coated with MgO as the main body and 10% Cr 2 o 3 After the annealing separation agent was dried, final annealing was performed including secondary recrystallization annealing and purification treatment at 1200° C. for 7...
Embodiment 3
[0098] A steel containing C: 0.070%, Si: 3.2%, and Mn: 0.1% was melted and cast into billets by continuous casting. Next, after heating to 1410°C, it is hot-rolled into a hot-rolled sheet with a thickness of 2.4mm, and after annealing the hot-rolled sheet at 1050°C for 60 seconds, it is cold-rolled once to make the intermediate sheet thickness 1.9mm, and then rolled at 1120°C. After performing intermediate annealing for 80 seconds, it was made into the cold-rolled sheet whose final sheet|seat thickness was 0.23 mm by 200 degreeC warm rolling. Next, in the atmosphere oxidation degree P(H 2 O) / P(H 2 ) = 0.40 oxidative humidity H 2 -N 2 The decarburization annealing which doubles as the primary recrystallization annealing was performed at 840 degreeC for 100 seconds in atmosphere. Then, the surface of the steel plate is coated with MgO as the main body and 10% Cr 2 o 3 After the annealing separation agent was dried, final annealing was performed including secondary recrysta...
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