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1 Archives of Foundry Engineering

1 2008

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Changes of phase morphology in 29%Cr-6%Ni-3%Mo-3% Cu steel castings with varied wall thickness

100%

Kalandyk B. , Augustyn-Pieniążek J.

Archives of Foundry Engineering

2008

tom Vol. 8, iss. 1 spec.

175--178

The article discusses the effect of wall thickness and temperature of solution treatment on the morphology of phases present in castings made from 29%Cr-6%Ni-3%Mo-3% Cu steel. The presence of acicular precipitates near the casting surface in as-cast condition was stated. The precipitates ceased to exist after the solution treatment, while volume fraction of the alloyed ferrite increased quite obviously. Compared with parallel investigations carried out on cast steel heats with lower concentration of Cr (24-25%), it has been started that high concentrations of Cr and Mo favour the occurrence of a brittle phase σ, both in as-cast condition and after solution treatment.