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Purpose: The paper presents the influence of heat treatment parameters (austenitization and tempering temperature) on the microstructure and mechanical properties of high - chromium martensitic GX12CrMoVNbN9-1 (GP91) cast steel. Moreover, the influence of stress relief annealing at the temperatures of 730 and 750oC on microstructure and properties has been investigated. Design/methodology/approach:...
The objective of the work was determination of microstructural factors affecting deformability and fracture of 9-12% martensitic steels at room temperature and in the temperature range of hot processing. Effect of heat treatment upon structure, tensile and impact strength has been investigated. Microstructure constituents responsible for generating and propagation of cracks in the investigated steels...
Influence of manufacturing process and heat treatment on microstructure and mechanical properties of 12%Cr heat resistance martensitic steels has been discussed. These steels are used for elevated temperatures applications like: heat and power plants, chemical and petrochemical installations. Some cases of manufacturing mistakes of steam pipelines and turbine blades had been presented. These mistakes...
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