Accession Number : AD0694821

Title :   AN INVESTIGATION OF THE CHANGE IN THE ELECTRICAL AND MECHANICAL PROPERTIES OF A BIMETAL COPPER-NICKEL WIRE IN THE PROCESS OF ITS MANUFACTURE AND PROLONGED HEAT TREATMENT,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Shpichinetskii,E. S. ; Emelyanov,Yu. A.

Report Date : 24 APR 1969

Pagination or Media Count : 15

Abstract : Bimetal copper-nickel wire is used in current-conducting cores of magnet wire operating at temperatures of up to 500 degrees C. The fabrication of this wire is based on drawing of bimetal billets represented by nickel-sheathed copper rods; the drawing is alternated with multistage intermediate annealing at 650-800 degrees C. Hence, the investigation is concerned with the variations in the electrical and mechanical properties of the bimetal wire during its fabrication under these conditions, with the object of determining the stability of these properties in magnet wire under normal operating conditions. It is established that high annealing temperatures affect more markedly the electrical properties of bimetal wire by promoting interdiffusion between Ni and Cu; hence, these temperatures must be limited to a minimum. A similar effect is produced by the degree of deformation and time of annealing.

Descriptors :   (*ELECTRIC WIRE, RELIABILITY(ELECTRONICS)), ELECTRICAL RESISTANCE, MECHANICAL PROPERTIES, MAGNET COILS, DRAWING(FORMING), HEAT TREATMENT, THERMAL STABILITY, DIFFUSION, DEFORMATION, IMPURITIES, COPPER, NICKEL, USSR

Subject Categories : Electrical and Electronic Equipment
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE