Vacuum welding

SDMS is the french leader in the manufacture of vacuum welding, vacuum chambers and UHV for Research, micro-electronics, Cryogenics, Space, Nanotechnologies.

Vacuum and ultra high vacuum (UHV) fabrications

Ultra high vacuum UHV fabrications are carried out in clean rooms of 10 000 or 100 000 class.

• UHV Vessel / Cryogenic pump 10-10 mbar CNRS / Air Liquide
• 10-10 mbar UHV Vessel - ultra high vacuum (VIRGO) Outgassing rate < 10 -14 Pa.m.s-1

Thus, vacuum and ultrahigh vacuum vessels can be made of copper or copper alloy using EB welding, with minimum deformation after welding, and thus comply with strict dimensional tolerances.

Vacuum and ultra high vacuum vessels: an economic comparison of aluminium and stainless steel

Dry (recommended for ultra high vacuum)
Aluminium from weldable families is very hard to machine when dry (particularly the AG3 and AG5 family 5000): the chips stick to the tool and cause metal to be torn off (this is true to a lesser extent for
stainless steel).

In an ultra high vacuum vessel (UHV vessels), welding must be in TIG on the vacuum side in AC using argon as a protective gas or an argon/helium mixture for large thicknesses or penetrations. The filling runs can be made in MIG from the outside...

Complete conference about Vacuum and ultra high vacuum vessels

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