IRON-BASED CASTING ALLOY Russian patent published in 2005 - IPC

FIELD: metallurgy; precision casting alloys at low thermal expansion; flying vehicles; opto-electronic engineering; laser engineering precision instrumentation engineering.

SUBSTANCE: proposed method is used for manufacture of parts working in contact with quartz, silicon, silicon carbide and other non-metals. Iron-based casting alloy contains the following constituents, mass-%: nickel, 31.0-32.5; cobalt, 9.4-11.0; molybdenum, 0.4-0.6; rare-earth elements: cerium, lanthanum, praseodymium, neodymium, total 0.04-0.25; the remainder being iron. Proposed casting alloy has reduced average temperature linear expansion coefficient within the following temperature ranges: 20-400°C, 20-450°C and 20-500°C.

EFFECT: enhanced resistance to cracking; enhanced homogeneity to temperature of minus 60°C.

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