I'd avoid it.
I used to do a lot of hardfacing as a boilermaker, some stick and some mig. Welding seams onto the outside of augers, and some work on big diggers, mostly it was welding huge sections (500lbs+ of welding wire per item) on copper pots for use in smelters. The pots were big enough to live inside of. I used to hardface some of my own tools, until I read of a guy who got killed by his nail punch. He was a boiler maker and hardfaced the tip of the punch, something I've done to my own punches. Was punching some steel for drilling and started feeling tired. Ended up having a little sleep and never woke up. The found a fine piece of hardfacing had chipped off and penetrated his lung, it left little blood. After reading the story I destroyed all the pounches, hammers, and slag chippers I had made.
If you want to make a hard wedge then use a mild grade of hardened steel like a bisalloy 80. Avoid the harder grades like the 400+ because they are just too brittle. Avoid hardfacing for the same reason, it's in the 400+ range. Very hard, but very brittle.
Shaun