Vintage Story lacks most kinds of salvaging. You can recoup the costs of lamellae and a few other things, but that's it.
This mod adds recipes for scrapping tools, tool heads, arrows etc, and overhauls the vanilla scrapping recipes to also require a hammer on top of the chisel. Open up the handbook (bits) to check out the recipes. Scroll down for some examples. This mod also makes steel bits smeltable in the bloomery, or they'd be useless.
I send warm hugs to ZyRail (base mod "Break Down Tools") and ArbyTheSeadragon (contributions to base mod).
Click here to teleport to the mod database.
EDIT: New variants dropped!
https://mods.vintagestory.at/salvageplus (the classic mod, now 4 bits per salvaged tool)
https://mods.vintagestory.at/salvageplusblue (10 bits per salvaged tool)
https://mods.vintagestory.at/salvagepluspink (18 bits per salvaged tool)
Thought I wouldn't make another post because they're identical save for the output of bits when salvaging tools.
Stay foxy!