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,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 24, 1969
- Accession Number
- AD0694821
Entities
People
- E. S. Shpichinetskii
- Yu. A. Emelyanov
Organizations
- National Air and Space Intelligence Center