Another muggyweld.com customer testimonial.
Jon purchased the 77 electrodes to repair an old cast iron vise. Jon said one side had more porosity than the first side he had welded. The odds are that the side with the porosity may have seen more contaminates (oils - dirt, etc.) over the years, which soaked into the porous cast iron. Heating the cast iron to around 400 to 500 degrees Fahrenheit could help bake some of those contaminates out before welding. I know Jon said he was a novice, but he repaired a large piece of cast iron that most professional welders would have never attempted.
Below is Jon's take on the welding process.
Yo! It's working!!! Here is one side of the repair so far. I'm two steps below a beginner welder but was able to make it happen. I located the end of the crack with a 10x loupe then drilled a termination hole. Then I began to hog out a valley with a tungsten carbide Dremel bit. I only slightly warmed up the weld area with a map/oxy torch, final cleaning with a fine wire wheel, and slowly laid down the root pass 1/2" at a time, peening with a punch between passes.
Here is the other side; the process was exactly the same. I encountered a bit more porosity on this side for whatever reason, so after the root passes, I ended up turning the amps down a bit and did some cosmetic fill work.
I found the weld itself is much harder than the old cast iron, which makes me think that this repair is now going to make this area even stronger than it was as cast.
Just like you guys said, the 77 is a really good color match to the cast iron once ground down.
Jon, thank you for the photos and testimonial and for giving muggyweld.com a shot at saving the old vise.
#CastIronViseRepair #WeldingCastIronVise #HowToWeldCastIron #MuggyWeldIt
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3 окт 2024
