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Application of cast nickel alloys for parts of electronics characterised by special magnetic properties

Uhl W., Pirowski Z., Kułak A.

Archives of Foundry Engineering

2008

Vol. 8, iss. 1 spec.

327--330

The theoretical part of the study highlights the origin of the idea to start investigations on alloys of high magnetic permeability, manufactured mainly by companies in the USA and Japan. The said materials are applied for various parts of electronics used by the military industry, e.g. satellite antennas for global communication with submarines, and for research instruments, e.g. ferromagnetic cores. They are characterised by very high magnetic permeability, resistivity and corrosion resistance which make them suitable for operation under extra-trying conditions. Nickel alloys of high magnetic properties are usually manufactured as rolled products. The ambition of the authors of this study is to manufacture them as cast products. The program of research included characteristic of nickel alloys with additions of molybdenum and iron satisfying the above mentioned requirements, with attention focussed on their application for magnetic parts of satellite antennas and ferromagnetic cores. Moulding and casting technologies were proposed to best suit the process of manufacture of these elements. The range of chemical compostion was selected to ensure the required magnetic, mechanical and anti-corrosive properties. A series of melts was prepared and castings of the above mentioned elements were made. The chemical composition of the alloys was analysed along with the structure examinations and quality assessment made by the non-destructive methods. Castings were subjected to the finishing treatment, followed by tests and examinations to enable their practical application.