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Orientation silicon steel and manufacturing method thereof

一种取向硅钢、制造方法的技术，应用在制造工具、电感/变压器/磁铁制造、磁性材料等方向

Active Publication Date: 2014-06-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is still a lot of room for improvement in the current manufacturing method of grain-oriented silicon steel, and the research and development of the manufacturing method of grain-oriented silicon steel with excellent magnetic properties is also of great significance and broad application prospects

Method used

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  • Orientation silicon steel and manufacturing method thereof
  • Orientation silicon steel and manufacturing method thereof
  • Orientation silicon steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1-5

[0031] The components and weight percentages of oriented silicon steel slabs are C: 0.050%, Si: 3.0%, Als: 0.030%, N: 0.007%, S: 0.008%, Mn: 0.14%, and the rest are Fe and unavoidable impurities. Heat the slab in a heating furnace at 1000-1250°C and then hot-roll it to a thickness of 2.5 mm, then cold-roll the hot-rolled plate, and roll the hot-rolled plate to 0.30 with different cold rolling reductions. After the thickness of mm finished product, decarburization annealing is carried out, the annealing separator with magnesium oxide as the main component is coated, and high-temperature annealing is carried out after coiling; nitriding treatment is carried out after the final cold rolling and before high-temperature annealing and secondary recrystallization; Coating insulating coating and stretching and leveling annealing to obtain the finished product of oriented silicon steel. The relationship between the small grain area ratio of D<5mm in the finished grain-oriented silicon ...

Embodiment 9-15 and comparative example 6-14

[0036] The components and weight percentages of oriented silicon steel slabs are C: 0.075%, Si: 3.3%, Als: 0.031%, N: 0.009%, S: 0.012%, Mn: 0.08%, and the rest are Fe and unavoidable impurities. The slab is heated in a heating furnace at five different heating temperatures of 1050-1250°C and then hot-rolled to a thickness of 2.3mm. After rolling to 0.20~0.40mm thickness of different specifications, decarburization annealing is carried out, annealing separator with magnesium oxide as the main component is coated, and high temperature annealing is carried out after coiling; after final cold rolling, high temperature annealing before secondary recrystallization Carry out nitriding treatment; after uncoiling, it is coated with an insulating coating and stretched, leveled and annealed to obtain a finished product of oriented silicon steel. The relationship between the slab heating temperature and cold rolling reduction rate and the small grain area ratio of D<5mm in the finished g...

Embodiment 16-31

[0041] The components and weight percentages of oriented silicon steel slabs are C: 0.065%, Si: 3.2%, Als: 0.025%, N: 0.010%, S: 0.015%, Mn: 0.18%, and the rest are Fe and unavoidable impurities. The slab is heated in a heating furnace at 1150°C and then hot-rolled to a thickness of 3.0mm, and the hot-rolled sheet is subjected to (A) direct cold rolling, or (B) at a temperature of 850-1200°C and 15- The hot-rolled sheet is annealed at a cooling rate of 25°C / s, and then cold-rolled at a cold-rolling reduction rate of 85%. After rolling to a finished product thickness of 0.30mm, decarburization annealing is performed, and magnesium oxide is coated as the main component. Annealing separator, high-temperature annealing after coiling; nitriding treatment after final cold rolling and before high-temperature annealing and secondary recrystallization; after uncoiling, apply insulating coating and stretching and leveling annealing to obtain finished oriented silicon steel. The relation...

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Abstract

The invention relates to orientation silicon steel with excellent magnetic property and a manufacturing method thereof. The orientation silicon steel is characterized in that the orientation silicon steel with excellent magnetic property is obtained by controlling the area ratio of small crystal particles of 5mm in the orientation silicon steel finished product to be less than or equal to 3 percent and controlling the ratio of the magnetic conductivity of orientation silicon steel finished product under the magnetic induction of 1.7T and under the magnetic induction of 1.5T to be more than 0.50. In addition, by adopting the orientation silicon steel blank with appropriate components and optimized cold rolling step, the size and the ratio of the crystal particles of the orientation silicon steel finished product can be well controlled and the magnetic conductivity within a given magnetic induction range can be controlled, while the heating temperature and the production cost of the blank are effectively reduced, the good goss texture orientation after the secondary recrystallization can be guaranteed, and finally the orientation silicon steel product with excellent magnetic property can be stably obtained.

Description

technical field [0001] The invention relates to an orientation silicon steel and a manufacturing method thereof, in particular to an orientation silicon steel with excellent magnetic properties and a manufacturing method thereof. Background technique [0002] Oriented silicon steel is widely used in power transmission and transformation products such as large transformers, and it is one of the indispensable raw materials for the development of the power industry. At present, people are working hard to obtain grain-oriented silicon steel with excellent magnetic properties. The main technical indicators of the magnetic properties of oriented silicon steel include magnetic induction and iron loss. The iron loss is directly related to the iron core loss when using transformers and other power transmission and transformation products. Some people say that the history of the development of silicon steel products is actually the history of continuous decline in iron loss; Inductan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C21D8/12
CPCC21D8/12C22C38/001C22C38/04C22C38/06C21D8/1233C22C38/02H01F1/18C21D1/26C23C8/80C21D3/04C21D6/008C21D8/1216C21D8/1222C21D8/1255C21D8/1261C21D8/1283C21D9/46C23C8/02C23C8/26H01F1/14783C21D2201/05C21D8/1272C21D6/005H01F1/14775H01F1/16H01F41/02H01F41/32
Inventor 杨国华刘献东李国保杨勇杰胡卓超黑红旭张军宿德军孙焕德吴美洪
Owner BAOSHAN IRON & STEEL CO LTD
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