"Terry Coombs" wrote in message
news
Had another chat with the glass bead maker that wants me to
fabricate some tooling . She needs some mandrels made that are a
piece of tungsten rod welded/brazed to a stainless steel handle .
The join is not subject to the full heat of molten glass . Am I
right in assuming that a TIG torch set on DCEN will melt and fuse
these two metals without filler ? What filler is recommended ? I
have on hand 308 309/309l , and some 312 in various sizes . I also
have some ER70S2 on hand and some Invar42 nickel/iron filler . She
indicates that these must be pretty straight , no wobbles when they
are spun or rolled across a flat surface . I'm thinking a long vee
block with a cutout in the middle , maybe a spring on one end to
keep things pushed together . We're getting into uncharted territory
here for me , I'm open to suggestions - that pertain to the task at
hand , please .

--
Snag
Yes , I'm old
and crochety .
Get off my lawn !


Perhaps you could explain to her the advantages of a press fit in a
bored hole.