- Thread starter dai
- Start date
the rods may need baking. Sometimes they attract moisture to the point where it is chemically combined and a warm on a rayburn just wont do it. They need 350 oC for an hour or so.
Other than that its usually contamination by something, paint, oil, or just dirt. Try running them on a clean piece of mild steel and see what happens.
Stopping porosity isnt easy, you just have to keep eliminating things until it stops and it usually a combination.
Other than that its usually contamination by something, paint, oil, or just dirt. Try running them on a clean piece of mild steel and see what happens.
Stopping porosity isnt easy, you just have to keep eliminating things until it stops and it usually a combination.
dai
welsh and proud
- Messages
- 742
i would have thought that being stored in the rayburn would be good enough
what sort of amps are we needing to run 4mm rods??says on the packet 170
i was useing 130 amps with the arcforce turned up
i belive the idea is to just stick the hardfacing to the metal,not pump the amps in for penetration
The rayburn might put moisture IN rather than dry them out. Some of the chemicals contain water that is chemically bonded and can only be removed at 350 - 450 oC. These chamicals are trying to get back to their stable state ie containing water. Therfore the moist air in and around the rayburn could be helping them to gain moisture rather than lose it.
Usually around 160 amps give or take a few but usually its too many amps that "boils" the weld not too few.
Usually around 160 amps give or take a few but usually its too many amps that "boils" the weld not too few.
dai
welsh and proud
- Messages
- 742
right then
how am i gonna get the rods to 350 400 degrees then
my oven dont go past 250
dai
welsh and proud
- Messages
- 742
right here goes
too much time on my hands this afternoon
coz of rain ,so had a play about
4 rods left in the workshop from the other day,damp to the touch
first 7 pics were all done with the same rod
first pic, 4mmhardox rods onto an old shiny plough point,various amps from 130 -160
second pic, still porus
third pic , different wearing part 130 and 150 amps ,not porus
4 pic, 3.2mm 6013 rods onto ploughpoint 90 amps
5 pic +6 pic i got a peeler but the weld looks ****
7 pic, hardox rods stick ok to the butter layer at 140 amps
8 pic to prove a point to myself ,a fresh rod(damp) onto a cultivator tip at 120 amps
too much time on my hands this afternoon
coz of rain ,so had a play about4 rods left in the workshop from the other day,damp to the touch
first 7 pics were all done with the same rod
first pic, 4mmhardox rods onto an old shiny plough point,various amps from 130 -160
second pic, still porus
third pic , different wearing part 130 and 150 amps ,not porus
4 pic, 3.2mm 6013 rods onto ploughpoint 90 amps
5 pic +6 pic i got a peeler but the weld looks ****
7 pic, hardox rods stick ok to the butter layer at 140 amps
8 pic to prove a point to myself ,a fresh rod(damp) onto a cultivator tip at 120 amps
