If you wish to play around with carbidizing a bit, just take any DC voltage source of 15 to 20 VDC (be sure it's fused at 2 amp or so). Connect positive lead to the Dremel etcher carbide bit, connect negative lead to blade (or test metal), set the Dremel etcher to "5", turn it on, and lightly touch carbide point/edge to metal and watch the sparks fly. You will lay down a nice thin layer of carbide.
Ken H>