Consequences of magnetic aging for iron losses in electrical steels |
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Authors: | Marcos F de Campos Marília Emura Fernando JG Landgraf |
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Institution: | 1. Inmetro –Dimci/Dimat, Av. Nossa Senhora das Gracas 50 Xerem, Duque de Caxias, RJ 25250-020, Brazil;2. GlobalMag, São Paulo, SP, Brazil;3. Instituto de Pesquisas Tecnológicas—IPT, Av. Professor Almeida Prado 532, São Paulo, SP 05508-901, Brazil |
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Abstract: | Electrical steels, when submitted to operation, present continuous decrease of their magnetic properties, depending on the carbon content. This effect is attributed to the increase of the size of carbides, a process also known as coarsening or Ostwald Ripening. Loss separation can offer a better understanding of this phenomenon. Experimental results show that all effect of aging is inside the hysteresis loss component, with the excess losses unaffected. The carbon content in electrical steels should be less than 25 ppm to avoid magnetic aging. |
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Keywords: | 75 50 bb |
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