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Laser Welding 304 SS

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Haf

Mechanical
Nov 6, 2001
176
I would like to laser weld a 304 SS closure disc to a 304 SS cylinder. The ID of the cylinder is 0.25" and the OD is 0.41". The closure disc is 0.02" thick. Pressure in the cylinder could build to as much as 180 kpsi (for just a fraction of a second). I would like the disc to remain attached at this design pressure, although dimpling is acceptable. My question has two parts:

1. Would it be more effective to notch the inside of the cylinder, place the closure disc in the notch and weld from the top or should I just place the closure disc on top of the cylinder and weld from the side?

2. How do I calculate stresses in the laser weld? I assume this involves estimating how much material is joined by the weld (i.e., weld penetration depth)?

I know very little about welding and even less about laser welding. Any help would be appreciated!

Thanks,

Haf
 
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