Electrical steel sheet.

摘要

An electrical steel sheet contains 0.01 wt.% or less C, 4 to 10 wt.% Si, 0.5 wt.% or less Mn, 0.01 wt.% or less P, 0.01 wt.% or less S, 0.2 wt.% or less Sol. Al, 0.01 wt.% or less N, 0.02 wt.% or less O, and the balance being Fe and inevitable impurities, the electrical steel sheet containing crystal grains and grain boundaries, said grain boundary having an oxygen content of 30 atomic % or less. The electrical steel sheet may contain 4 to 10 wt.% (Si + Al) instead of 4 to 10 wt.% Si. The grain boundaries may have the oxygen content of 30 atomic % or less and a sulfur content of 0.2 atomic %.