Temperature influence of ceramic form on the structure of cobalt alloy MAR-M509 castings

doi:10.11890/1006-7191-111-23

Abstract

Abstract: The manuscript presents changes of macrostructure and microstructure of plate and shaft castings made of cobalt alloy MAR-M509. They have different values of geometric module M within the range of 0.91-5.56 mm that have been created with multilayer ceramic shell moulds (MSC) of different initial temperatures of 200-1000℃ at the moment of pouring. It has been stated that decrease of initial temperature of MSC and value M causes increase in casting fine-granularity, distance reduction between dendrite branches λ₂ and refinement of initial carbides in irregular ternary eutectic γ+$M₂₃C₆+MC.

Key words: Multilayer ceramic shell mould (MSC), Cobalt alloy MAR-M509, Casting

ZENON OPIEKUN. Temperature influence of ceramic form on the structure of cobalt alloy MAR-M509 castings[J]. Acta Metallurgica Sinica (English Letters), 2011, 24(1): 23-33.

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