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Improvement of slurry erosion resistance of martensite/ferrite duplex stainless steel by hot rolling

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Abstract

Test samples of martensite/ferrite duplex stainless steels (M/Fss) were prepared using thermal-mechanical processes and their slurry erosion behaviors were systematically studied. Test results show that hot rolling is an attractive process for improving erosion resistance. This improvement is more evident at higher impinging angles and larger reduction ratios. The thermal-mechanical-treated samples exhibit higher slurry erosion resistance for all impinging angles compared to that obtained by conventional quenching treatment without rolling. The variation tendency of the erosion rate versus the impinging angle for samples rolled with different degrees of reduction is similar in that the erosion rate initially increases and then decreases as the impinging angles increase from 15° to 90°, reaching a maximum at approximately 30°. After impingement erosion, the surface morphologies of the samples exhibit many long furrows and ridges at a low impinging angle of 30°. At a high impinging angle of 90°, the samples exhibit a worn surface with abundant overlapping and irregular concavities. The surface hardness of the samples after impingement erosion increases as the impinging angles and reduction ratios increase due to the enhanced effects of both work hardening and the formation of straininduced martensite.

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Authors and Affiliations

  1. Department of Mechanical Engineering, China University of Science and Technology, 245, Section 3, Academia Road, Nangang District, Taipei, 11581, Taiwan, R.O.C

    Dong-Cherng Wen

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  1. Dong-Cherng Wen
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Correspondence to Dong-Cherng Wen.

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Wen, DC. Improvement of slurry erosion resistance of martensite/ferrite duplex stainless steel by hot rolling. Met. Mater. Int. 16, 13–19 (2010). https://doi.org/10.1007/s12540-010-0013-z

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  • DOI: https://doi.org/10.1007/s12540-010-0013-z

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