Weld Stud, Titanium 1

[joejack7]

Need some help on this one?

We are trying to create a weld stud on .012" thick titanium, grade 3 or 4. We have a weld stud gun but contiuously keep blowing thru the metal. Also some of our weld studs are stainless steel. Does this pose a problem with different metals? Also is cleaniness an issue? Our engineering dept. had no problems with samples but we have had lots of troubles in the production environment. Thanks.

 

[DDRSS10]

Are you using a backer to remove the heat quickly? If not you could be getting a burn out. Actual combustion of the TI. SS to TI is not possible from what Iv'e ever seen. Cleanliness is the most important thing in welding TI as is a shielding gas TI hates oxygen and hydrogen. Hope some of this helps.

Nick

"Speed costs money boys, how fast do you want to go?"

 

[kweld]

Yes!
Shielding gas (argon) is the first priority. Ti being exposed on the ambient air at 400 degrees C within welding almost turns to wite sand( dust)!So the gas to be applied to each surface being heated up to 400 oC! Heat also to be removed as quick as possible!
As for SS+Ti so this will be not reliable joint. For arc welding the third intermediate metall (bronze ore tantal) shall be used!

Nick

 

[SMF1964]

With the high melting point of titanium, I would think that youw would not be able to keep the stud weld metal from becoming too fluid. Wouldn't you have better success with a brazing joint? Properly done, you can get a joint strength that approaches a welded joint.