What app did you use to bake this in? What I find is very usefull is to render a single color diffuse (standard texture set to roughly the color of your metal base) to texture with lighting and shadows in max using a skylight (or spend some time on the lighting to really bring out the normal map). Then use that as a layer…
looks alright, but you need to get much more depth into your diffuse and specular maps (if you're not using a specular map you should be!) basically just get some darker edges in where the angles hit a trough, and some lighter tones on the sharp raised edges, that should help the whole thing pop out a lot more and not look…