It´s a good start. Normally the metallic map is only black and white. Detail like these scratches only belong to the normal and roughness map.
Your normalmapped details look a bit jagged in some areas. For example in this circular area at the blade. This can happen when your highpoly edges are too sharp. Maybe just post a image of your high and lowpoly in comparison and we could judge this better .
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Your normalmapped details look a bit jagged in some areas. For example in this circular area at the blade. This can happen when your highpoly edges are too sharp. Maybe just post a image of your high and lowpoly in comparison and we could judge this better .