Experimental study of high velocity oxy-fuel sprayed WC-17Co coatings applied on complex geometries. Part B: Influence of kinematic spray parameters on microstructure, phase composition and decarburization of the coatings

被引：27

作者：

Katranidis, Vasileios ^{[1
]}

Gu, Sal ^{[1
]}

Reina, Tomas Ramirez ^{[1
]}

Alpay, Esat ^{[1
]}

Allcock, Bryan ^{[2
]}

Kamnis, Spyros ^{[2
]}

机构：

[1] Univ Surrey, Dept Chem & Proc Engn, Guildford GU2 7XH, Surrey, England

[2] Castolin Eutect Monitor Coatings, 2 Elm Rd, North Shields NE29 8SE, Tyne & Wear, England

来源：

SURFACE & COATINGS TECHNOLOGY | 2017年 / 328卷

基金：

英国工程与自然科学研究理事会;

关键词：

HVOF; WC-Co; Decarburization; Microstructure; Spray angle; Spray distance; WC-CO COATINGS; CARBIDE-BASED COATINGS; PROCESSING PARAMETERS; OXIDATION BEHAVIOR; RESIDUAL-STRESSES; WEAR PERFORMANCE; CERMET COATINGS; CARBON LOSS; POWDERS; SIZE;

D O I：

10.1016/j.surfcoat.2017.09.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The aim of this study is to evaluate comprehensively the effect of spray angle, spray distance and gun traverse speed on the microstructure and phase composition of HVOF sprayed WC-17 coatings. An experimental setup that enables the isolation of each one of the kinematic parameters and the systemic study of their interplay is employed. A mechanism of particle partition and WC-cluster rebounding at short distances and oblique spray angles is proposed. It is revealed that small angle inclinations benefit notably the WC distribution in the coatings sprayed at long stand-off distances. Gun traverse speed, affects the oxygen content in the coating via cumulative superficial oxide scales formed on the as-sprayed coating surface during deposition. Metallic W continuous rims are seen to engulf small splats, suggesting crystallization that occurred in-flight.

引用

页码：499 / 512

页数：14

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