Lead pins for compression-sealed glass hermetic seals and their manufacturing method, as well as airtight terminals and electric compressors

Abstract

The present invention provides a lead pin for a compression-sealed glass hermetic seal that has a relatively small axial thermal expansion coefficient and high axial electrical conductivity, offers high reliability in bonding with the sealing glass, allows for the conduction of large currents even with a small diameter, and generates little heat during energization. [Solution] The [Cr and / or Mo]-Cu composite has a metallic structure in which a Cr phase and / or Mo phase are dispersed in a Cu matrix. This [Cr and / or Mo]-Cu composite is a diameter-reduced stretched material for powder metallurgy molded bodies. When the cross-sectional structure is observed with an optical microscope, it has an axial cross-sectional structure in which layered or linear Cr phases and / or Mo phases are dispersed in the Cu matrix, and a radial cross-sectional structure in which flaky, small-piece, or granular Cr phases and / or Mo phases are dispersed in the Cu matrix.

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