Influence of cold welding on detachable joints with plastic lining

1Boiko, Yu.S
1Oles Honchar Dnipro National University, Dnipro, Ukraine
Kosm. nauka tehnol. 2001, 7 ;(Supplement1):115-117
Publication Language: Russian
Assembly and test pneumatic-hidraulic systems showed that detachable flange connections don't lose their tightness after removal the fixtures from them even in conditions of regular loadings. It is suppoused that the reason of that is a cold welding. The accounts carried out on regular flange seam connections showed that in a zone of contact of a lining from copper M3 and flanges from steel 12Х18Н10Т-ВД the pressure made size 260—280 MPa, that is 13—14 times large as the pressure necessary for the beginning of plastic deformation of a lining, and 17.3 times large as the pressure necessary for realization of cold welding. The received results allowed to make a conclusion that there is a cold welding in a basis of arising effect of coupling in detachable connections with plastic lining.
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