Journal of Engineering and Applied Sciences
ISSN: Online 1818-7803ISSN: Print 1816-949x
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The Effect of Heat Treatment Conditions on the Microstructural Characterization, Mechanical Properties and Corrosion Behavior of Super Duplex Stainless Steel Casting
Tran Duc Huy, Bui Thi Thanh Huyen and Do Van Quang
Page: 1239-1245 | Received 21 Sep 2022, Published online: 21 Sep 2022
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Abstract
The effect of solution annealing temperature ranging from 1050-1100°C and aging at 480°C on the microstructure, mechanical properties and pitting corrosion resistance of Super Duplex Stainless Steel (SDSS) casting were investigated. Obtained results showed that the content of ferrite phase slightly increased as decreasing of austenite phase. The ε-Cu was observed into incoherent type after solution annealing and coherent type after solution annealing and aging at 480°C. The small particles of the g-phase dispersed in ferrite matrix increase their hardness and diminish corrosion resistance of ferrite phase. Especially, the little negative hysteresis and high breakdown potentials determined from cyclic potentiodynamic polarization curves of SDSS showed that the high pitting corrosion resistance were obtained for the sample with both annealing and aging. The mechanical properties of the SDSS casting were also investigated such as hardness, micro hardness and impact strength. The value of hardness and impact strength of SDSS casting which were solution annealing at 1100°C and aging at 480°C were 295 HB and 77 J, respectively.
How to cite this article:
Tran Duc Huy, Bui Thi Thanh Huyen and Do Van Quang. The Effect of Heat Treatment Conditions on the Microstructural
Characterization, Mechanical Properties and Corrosion
Behavior of Super Duplex Stainless Steel Casting.
DOI: https://doi.org/10.36478/jeasci.2018.1239.1245
URL: https://www.makhillpublications.co/view-article/1816-949x/jeasci.2018.1239.1245