This is just a curious question. Do you think Hex Workshop can be succesfully used as a data recovery tool or not?
Considering the fact that it can view the disk surface as a hexadecimal record, sector by sector.
Also, if I tried to use it in such a way, for example to recover a partially damaged file, what steps should I take after copying all surviving data to a single file on my HDD?

there used to be a utility that was packed with DOS 5 called undelete , you can recover almost all of your data depending on how long it's been since you last deleted it , as far as using that Hex program , I would seriously wouldn't want to be playing around with the disk surface and editing it , you can fry your HDD or else do something strange to it , d/l yourself a data recovery prog instead there is a few ones out there.

Ouch. I cut the post short and did not explain. Oh, well. What I meant was recovering data from a damaged floppy or a damaged HDD and not recovering deleted files.

Now, the thing is that I create a new file on my HDD and copy the hexadecimal data to it from the floppy sector by sector.
Pretty much it's an image of the damaged disc, or at least those areas that could be read.
What further steps should I take?

you can use utilities like Disk Recovery for DOS (not sure of the original name but it was a tool that came with DOS 5) , it's not a bad program , or else you can use a disk copying program as well , as far as damaged files on a HDD . it depends on the extent of the damage to the file , some of them can be unrecoverable. File damage on a HDD means that there are some bad clusters where the file is held , use something like Scandisk to repair them.