Erosion-corrosion resistance of Mo-Ti- and Ni-Cr-Mo-alloyed medium-carbon martensitic steels: a critical analysis of synergistic effect of erosion and corrosion  

作　　者：De-fa Li Hang-yu Dong Cheng-yang Hu Kai-ming Wu Serhii Yershov Oleg Isayev 

机构地区：[1]School of Mechanical and Vehicle Engineering,West Anhui University,Luan 237012,Anhui,China [2]The State Key Laboratory of Refractories and Metallurgy,Hubei Province Key Laboratory of Systems Science on Metallurgical Processing,International Research Institute for Steel Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [3]Laboratory for Excellence in Advanced Steel Research,Materials Science and Engineering Program,Department of Metallurgical,Materials and Biomedical Engineering,University of Texas at El Paso,El Paso,TX 79968,USA

出　　处：《Journal of Iron and Steel Research International》2022年第8期1299-1311,共13页

基　　金：support from National Natural Science Foundation of China(Grant Nos.U20A20279,12072245,and 52071238);High Technical Key Project of Hubei Province(2021BAA057);Taishan Industrial Talent Project,Wuhan University,of Science and Technology,(Grant No.2018 TDX07)and i11 Project(D18018)。

摘　　要：Grain refinement renders Mo-Ti-alloyed medium-carbon martensitic steel to exhibit high hardness,high strength,and good toughness,but the erosion-corrosion resistance of steel in a corrosive slurry environment is not known.Mo-Ti-alloyed medium-carbon martensitic steel is compared with Ni-Cr-Mo-alloyed medium-carbon martensitic steel,and the erosion-corrosion resistance of those two steels under impingement by NaCl solution with gravels has been investigated.Three components,pure-corrosion rate,pure-erosion rate,and synergistic effect of erosion and corrosion(SEEC)of erosion-corrosion rate,were quantified.The pure-corrosion and pure-erosion rates of Mo-Ti-alloyed steel were higher than those of Ni-Cr-Mo-alloyed one;however,its erosion-corrosion rate was relatively lower because of a weak SEEC.Surface plastic deformation and work hardening due to gravel impingement were the essential reason for SEEC,which could be reduced by grain refinement,and consequently,Mo-Ti-alloyed steel with finer grains had better erosion-corrosion resistance.Grain refinement could be an effective way to improve the erosion-corrosion resistance of martensitic steels.

关 键 词：Grain refinement Mo-Ti alloying Ni-Cr-Mo alloying MARTENSITE EROSION-CORROSION 

分 类 号：TG142[一般工业技术—材料科学与工程]