Solid particle erosion behavior of HVOF/HVAF sprayed WC-Co-Cr coatings

被引：20
作者：
Li, Yang [1 ]
Lian, Ying [1 ]
Cao, Jingjing [1 ]
Li, Li [1 ]
机构：
[1] Hebei Univ Engn, Coll Mech & Elect Engn, 199 Guangming South St, Handan 056038, Peoples R China
来源：
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY | 2016年 / 230卷 / 06期
关键词：
Erosion behavior; WC-Co-Cr coatings; erosion mechanisms; cracks; microstructure; SLURRY;
D O I：
10.1177/1350650115608209
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The erosion behavior of three WC-Co-Cr coatings obtained by high velocity oxy-fuel/air-fuel (HVOF/HVAF) thermal spray systems has been investigated using Al2O3 as erodent at four impingement angles (15 degrees, 45 degrees, 75 degrees, 90 degrees) and 90m/s impact velocity. The results indicate that the micro-cutting and coatings spallation are main erosion mechanisms for coatings, and the proportion of the two mechanisms changes depending on the impingement angle. The ranking of the coatings in terms of erosion resistance is very much dependent on the microstructure of coatings. The behavior of formation and propagation of cracks also depends on the microstructure of coatings, and has been understood in terms of schematic diagrams.
引用
收藏
页码：634 / 643
页数：10
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