Improvement on mechanical properties and wear resistance of HVOF sprayed WC-12Co coatings by optimizing feedstock structure

被引：100

作者：

Ma, Ning ^{[1
,3
]}

Guo, Lei ^{[2
,3
]}

Cheng, Zhenxiong ^{[2
]}

Wu, Huantao ^{[2
]}

Ye, Fuxing ^{[2
,3
]}

Zhang, Keke ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China

[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

[3] Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2014年 / 320卷

基金：

中国国家自然科学基金;

关键词：

WC-12Co coatings; HVOF; Feedstock structure; Mechanical properties; Wear resistance; WC-CO COATINGS; ABRASIVE WEAR; BEHAVIOR; MICROSTRUCTURE; PERFORMANCE; DEPOSITION; PLASMA; SIZE;

D O I：

10.1016/j.apsusc.2014.09.081

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

WC-12Co powders with a bimodal size distributed WC particles were used to produce coating by high velocity oxy-fuel (HVOF) spraying (B coating), and HVOF sprayed WC-12Co coatings from microstructured, submicrostructured and nanostructured powders were also fabricated for comparison. The phase constitution, microstructure, mechanical properties and wear performance of the coatings were investigated. Decarburization occurred during coatings preparation, and the carbide retention of B coating was 0.934, higher than that of nanostructured coating. B coating exhibited typical multimodal microstructure, and had considerably high microhardness and the highest fracture toughness among the four coatings, with the values of 1291 HV0.1 and 10.76 MPa M-1/2, respectively. When sliding against GCr15 ring in block-on-ring configuration, B coating exhibited the lowest wear rate and relatively lower friction coefficient compared with other coatings, with the average values of 0.94 x 10(-7) mm(3) N-1 m(-1) and 0.63 at 245N load, respectively, which could be attributed to the concrete-like structure. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：364 / 371

页数：8

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