Found a paper that said this weld area has such low tensile
that a test piece cannot be machined into a tensile test piece
But we have it sealing at 1000c and Ultra high vacuum , just so long as you do not flex the welded area,, or it will crack
We all know brushed motors in fuel tanks last 1000 's of hours
Why then with my brushed motor in my Radio Sub is the brush life about 5 minutes ,
Chlorinated pool water ,,,
low power
Suggestions appreciated
Have an 18 bolt flange heated to 200 C
Taken apart often
would silver plated 5/16 UNF be better
than Grade 12.9 Cap screws with hi temp lube ???? Thanks
I did post in Welding , but here might be better
Im trying to get 316 SS to take or braze or glue to Ta it seems to work in most cases
is there a matl I can use as a filler to enhance the bond
I have used tantalum in the moly to moly bond
and found that was good
I dont have to actually melt the Ta do I
I can just sort of glue the SS around it to seal
Its for UH Vacuum and about 1000C operation
its a 19 dia x 0.5 mm wall Ta tube into a SS Flange ,
My main problem is cracking in about 20% of parts
Seems like a new process
I assume its done in inert atmosphere , as opposed to for example tire mould cleaning with hand held laser
We are electropolishing now and are interested in the part that says it can seal micropores and cracks in SS
which is very important in ultra high vacuum...
