Abstract
With diffusion chromizing the iron magnetic circuit parts in relays, the following improvements were accomplished: surface hardening, corrosion protection, and better magnetic properties. From various procedures under consideration the chromium diffused coating in vacuum was selected. The specimens of pure iron 99.95% of Fe, were buried in a granular chromium (150 μm) and heated at the temperature from 950–1150 °C in vacuum (10−2–10−3 mbar) for durations from 3 to 12 h. The chromized layer thickness, the chromium concentration profiles, the microhardness, the coercive force, and corrosion resistance were measured.
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