Understanding the influence of microstructure features on the erosion resistance of low-carbon pipeline steel through computational simulation

作者：Li Lei^*; Li D Y

来源：Wear, 2013, 301(1-2): 70-75.

DOI：10.1016/j.wear.2013.01.042

• Wear resistance
• Cast iron
• Computer simulation

Low-carbon steel with pearlite-ferrite microstructure has been extensively used for oil sands slurry transport. As expected, the carbon concentration strongly affects the performance of the steel, which is largely attributed to the volume fraction ratio of pearlite to ferrite that is governed by the carbon concentration. However, it is often noticed in experiments that even a small change in the carbon concentration could lead to considerable difference in the erosion resistance. Thus, more detailed studies are needed to clarify the mechanism responsible for such observed difference in order to tailor low-carbon steel more effectively. In this study, using a micro-scale dynamic model (MSDM) we conducted computational modeling to investigate effects of the volume fraction ratio of pearlite to ferrite and the orientation of lamellar cementite on the erosion resistance of low-carbon steel in order to better understand the effect of microstructure features on the performance of the steel. It was demonstrated that the performance of horizontally aligned cementite plates (i.e. parallel to sample surface) was inferior to that of vertically aligned ones. Higher fraction ratios of pearlite to ferrite resulted in increased erosion resistance. Possible mechanisms responsible for the observed phenomena were analyzed and discussed.

• 出版日期2013-5