Effects of Cu content on the Secondary Recrystallication Behaviors of Grain Oriented Electrical Steels
碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 97 === Grain oriented electrical steel is an important function magnetic material. It has excellent permeability during magnetization.Grain oriented electrical steel is usually used to make the transformer cores. The normal grain growth during primary annealing and l...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2009
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| Online Access: | http://ndltd.ncl.edu.tw/handle/26474632200412400542 |
| Summary: | 碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 97 === Grain oriented electrical steel is an important function magnetic material. It has excellent permeability during magnetization.Grain oriented electrical steel is usually used to make the transformer cores. The normal grain growth during primary annealing and let the preferred Goss grain grow during secondary recrystallization.The purpose was studied the effects of copper content at different hot band annealing temperature and cold rolling thickness of slab on the secondary recrystallization. Copper impeded the normal grain growth during primary annealing and let the preferred Goss grain grow during secondary recrystallization.
Hot-rolling were not recrystallization in slab reheating at 1200℃. Hot rolling aneealing the grain size increases with increasing temperature. Carbon content will affect the content of nitrogen , however , the content of nitrogen will also affect the formation of precipitates. The highest induction(B8) was obtained when the nitrogen content in the steel sheet was 400ppm. After nitride treatment﹐the precipitates of CuS2、Si3N4 and AlN、MnS of the substrate, these precipitates will inhibit grain growth. Stable secondary recrystallization and the best magnetic properties are obtained for the specimens in hot band annealing at 1150℃.
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