Quote:
Originally Posted by oil pan 4
Can't buy them so I will have to make them. Mower blades are fairly hard steel already but not nearly as hard as chromium carbide hard facing rod.
The smallest hard facing rod I have is .125 inches. So I would probably burn through a standard mower blade. Just need to make sure I have 187 thickness and go from there. I think all I will be able to do is build the blade back up with wire feed welding then weld the underside with hard face rod.
Any blades I weld on will have a heat sink on them so the welding heat only effects the area immediately around the weld it's self. That way the heat can't spread put and ruin the heat treat and temper of the rest of the blade.
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All the mower blades that I have ever sharpened can be sharpened with a file, indicating a fairly
soft steel. From what I understand, they make the blades out of soft, typically non-hardenable, steels to be able to take the impact of hitting rocks and other things and not shattering.
Though I find adding the facing rod an interesting idea, I think the unequal heating of the mower blade is going to cause it to warp and bend and make it unbalanced in the end. I think you might have better luck with "pack carburizing" the mower blades.