The influence of solution annealing on microstructure and mechanical properties heat-resistant cast Steel HK30 modified by Niobium
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In this paper, the room temperature mechanical properties, as well as the microstructure of HK 30 Nb steel, were tested in the initial as-cast and solution annealed condition. Results show that tensile properties after the solution annealing have a slightly lower value than as-cast samples. Microstructural analysis of samples after solution annealing showed dissolution of primary carbides present in the initial as-cast condition. The morphology and composition of carbides were changed during a solution annealing. Analysis of microstructure was done by optical microscopy (OM) and scanning electron microscope (SEM), whereas hardness and tensile tests were performed for characterization of mechanical properties.
2017 ◽
Vol 17
(4)
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pp. 73-78
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2018 ◽
Vol 284
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pp. 615-620
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2010 ◽
Vol 638-642
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pp. 3479-3484
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2012 ◽
Vol 602-604
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pp. 627-630
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