| 摘要 |
FIELD: electrical engineering; devices designed for operation at liquid helium temperature. ^ SUBSTANCE: proposed method for manufacturing composite wire includes production of primary composite billet incorporating external sheath and axial cylindrical block, sealing of primary composite billet, reduction, and extrusion, followed by deformation to obtain rod of desired shape and size, its cutting into measured lengths, formation of secondary composite billet by assembling rod in external sheath, sealing of secondary composite billet, reduction, and extrusion, followed by deformation to final size of wire; composite billet reduction involves its pre-extrusion press-fitting in container; total cross-sectional area of composite billet components is 95-99% of that of inner space of container sleeve and inlet part of composite billet external sheath is made in the form of transition zone having cylindrical part whose outer diameter is smaller than that of container sleeve and conical part, volume of voids within composite billet amounting to 1-17% of that of external sheath inner space. ^ EFFECT: provision for pre-extrusion hot compression of composite billet without additional time requirement. ^ 6 cl, 2 dwg |
