Microstructure and cavitation erosion behavior of FeNiCrBSiNbW coating prepared by twin wires arc spraying process

被引：44
作者：
Lin, Jinran [1 ]
Wang, Zehua [1 ]
Lin, Pinghua [2 ]
Cheng, Jiangbo [1 ]
Zhang, Xin [1 ]
Hong, Sheng [1 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, Inst Met & Protect, Nanjing 210098, Jiangsu, Peoples R China
[2] Southeast Univ, Nanjing 211189, Jiangsu, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2014年 / 240卷
关键词：
Amorphous/nanouystalline coating; Cavitation erosion; Twin wires arc spraying; FeNiCrBSiNbW; CYLINDER WALL COATINGS; CORROSION BEHAVIOR; MECHANICAL-PROPERTIES; AMORPHOUS PHASE; WEAR PROPERTIES; VELOCITY; TEMPERATURE; ALLOYS; RESISTANCE; STRENGTH;
D O I：
10.1016/j.surfcoat.2013.12.071
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
FeNiCrBSiNbW coatings were prepared by twin wires arc spraying (TWAS) process. The microstructure and phases were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and differential scanning calorimeter (DSC). FeNiCrBSiNbW coating with compact structure and less oxide consisted of amorphous phase and some of alpha-(Fe, Cr) nanocrystalline phase. The crystallization temperature was 545 degrees C after a wide supercooling liquid region of 51 degrees C. FeNiCrBSiNbW coating had a hardness value of 919 +/- 49 Hvai, much higher than that of the 316 L coating (239 +/- 19 Hv(0.1)). The cavitation erosion behavior of FeNiCrBSiNbW coating and 316 L coating was investigated in distilled water. FeNiCrBSiNbW coating exhibited higher cavitation erosion resistance than that of the 316 L coating, due to the amorphous/nanocrystalline structure, less oxide and higher hardness. It revealed that FeNiCrBSiNbW coating was destroyed mainly in the form of delamination and the cavitation erosion cracks initiated at the edge of pores and the interface area around the un-melted particles. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：432 / 436
页数：5
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