Erosion Resistance and Its Mechanism for Flame-Hardened 12Cr Steel by High Speed Water Drop Impacts

G.H. Kim; Min Ku Lee; G.M. Kim; Sung Mo Hong; Wheung Whoe Kim; Chang Kyu Rhee

doi:10.4028/www.scientific.net/SSP.118.179

Paper Titles

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Effect of Hot-Dip Silicon-Aluminizing on the Anti-Carburization Behavior of High-Temperature-Resistant Steel HK40
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Erosion Resistance and Its Mechanism for Flame-Hardened 12Cr Steel by High Speed Water Drop Impacts
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Erosion Resistance and Its Mechanism for Flame-Hardened 12Cr Steel by High Speed Water Drop Impacts

Abstract:

In this study, the water drop impact erosion properties of 12Cr steel surface-hardened by the flame hardening process have been studied. For this, both the maximum erosion depth de,max and volume loss Ve with the number of cumulative impacts n have been investigated for the flame-hardened 12Cr steels with different hardnesses. Typically all the samples showed an erosion-time characteristic involving an incubation period initially followed by a steady state period. Compared to those for the as-received 12Cr steel, the flame-hardened ones showed an excellent erosion resistance to water drop impacts, showing a 2.2~2.8 times higher incubation time ti and 5~8 times lower erosion rate α. In the incubation period the as-received 12Cr steel was deformed by a ductile depression and ploughing, while the flame-hardened one by fatigue cracks and a brittle platelet deformation. In the steady state period the damage was progressed by a cleavage fracture for both the stages.

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Periodical:

Solid State Phenomena (Volume 118)

Pages:

179-184

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.118.179

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Online since:

December 2006

Authors:

G.H. Kim, Min Ku Lee, G.M. Kim, Sung Mo Hong, Wheung Whoe Kim, Chang Kyu Rhee

Keywords:

12Cr Steel, Erosion, Flame Hardening, Heat Treatment, Water Drop Impact

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