I work with a fastener manufacturer who has our hot dip galvanized product sent to an outside processor. Our processor has had issues with bare spots (see attached photo) and is having issues with finding the cause. I'm not particularly well versed in HDG defects and was looking for some help...
I am working on reducing cycle time and temperatures for a variety of low and medium carbon steel coils for subsequent cold heading (bolt manufacturing).
I always had the belief that inter-critical annealing is better because although it uses higher temperatures it allows for shorter cycle...
