TECHNOLOGY BEHIND IMPROVING THE PLATINITE QUALITY
DOI:
https://doi.org/10.14529/met180411Keywords:
composite material, bimetal, platinite, linear thermal expansion coefficient, absolute thickness variation coefficient, nickel-iron alloyAbstract
Platinite is bimetallic wire made of a nickel-iron core covered with a layer of copper. The product is used as electrical leads for glass cases of vacuum devices. This is why platinite requires that the coefficient of linear thermal expansion in the radial direction be strictly controlled. Platinite is manufactured by tubular or galvanic application of copper unto the core. These technologies are not fully compliant with state-of-the-art requirements to labor intensity, performance, environmental safety, etc. The research team has analyzed the main indicators of Russian- and European-made platinite as well as the deformation parameters of composite bimetallic billets when rolled by a plain-shaped caliber to obtain a bimetallic compound of their components. The analysis identified the deformation parameters of composite bimetallic billets when rolled by a plain-shaped caliber to obtain a bimetallic compound of their components. The developed process minimizes the shell thickness variation. The key operation of this technology is the joint plastic deformation of a composite laminated billet in a rolling unit. The technology has been implemented as a pilot machine equipped with auxiliary units for a continuous commercial production process. The oxidized platinite production technology presented herein raises the consumer quality of finished products to that of imported counterparts. Pilot batches of platinite produced by the recommended process for the purpose of quality control have been provided to a number of industrial users for testing, which returned positive reviews.References
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