The blade might be able to be welded. Unless it’s a rare collectable knife, the cost to do it is probably more than the knife is worth, plus the result is a cosmetic repair not a usable working blade (unless you also have the blade tempered).
Best bet is probably to replace the blade. For that you'll need an appropriate blade from a donor knife. If your next question is who to do it, go to the Knife Restoration and Repair forum here,
viewforum.php?f=37 find someone whose work you like and send them a PM with pictures of your knife and a description of what you want done, and request a quote.
Welcome to AAPK.
Ken
$225.00 
$155.00 
$800.00 
$750.00 
$175.00 
$160.00 
$375.00 
$395.00 
$225.00 
$299.99 
$144.99 
$295.00 
$75.00 
$75.00 
$175.00 
$182.50 
