A study on powder mixing for high fracture toughness and wear resistance of WC-Co-Cr coatings sprayed by HVOF

被引：96

作者：

Lee, C. W. ^{[2
]}

Han, J. H. ^{[1
]}

Yoon, J. ^{[3
]}

Shin, M. C. ^{[2
]}

Kwun, S. I. ^{[4
]}

机构：

[1] Korea Inst Sci & Technol, Adv Funct Mat Res Ctr, Seoul 136791, South Korea

[2] Shin Hwa Met Co Ltd, Thermal Spray Res Lab, Pusan 604050, South Korea

[3] Hansung Univ, Dept Mech Syst Engn, Seoul 136792, South Korea

[4] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

来源：

SURFACE & COATINGS TECHNOLOGY | 2010年 / 204卷 / 14期

关键词：

Thermal spray coating; HVOF; WC-Co-Cr; Powder mixing; Porosity; Wear; MICROSTRUCTURE; BEHAVIOR; EROSION; CARBIDE; SIZE; ABRASION; PLASMA; POWER;

D O I：

10.1016/j.surfcoat.2009.12.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of mixing powders with various particle sizes on the fracture toughness and wear resistance of thermally sprayed WC-10Co-4Cr coating layers fabricated by the HVOF (High-Velocity Oxygen Fuel) process on a S45C steel substrate were investigated. In order to obtain a high fracture toughness and wear resistance, the powder size and powder mixing ratio were varied. The microstructure and chemical composition of the phases in the coatings were characterized by means of the SEM and XRD techniques. Image analysis was used for the evaluation of the porosity of the coatings. Indentations tests were carried out on the cross sections of the coatings to evaluate the hardness and fracture toughness. The wear properties of the coatings were assessed using a pin-on-disk wear tester at ambient temperature without lubrication. The mixing of a small amount of coarse powders with fine powders resulted in the highest fracture toughness and wear resistance, due to the formation of coating layers having the lowest porosity. (C) 2009 Published by Elsevier B.V.

引用

页码：2223 / 2229

页数：7

共 19 条

[1]

ARATA Y, 1986, ADV THERMAL SPRAYING, P805

[2] ABRASION, EROSION AND SCUFFING RESISTANCE OF CARBIDE AND OXIDE CERAMIC THERMAL SPRAYED COATINGS FOR DIFFERENT APPLICATIONS [J].

BARBEZAT, G ;

NICOLL, AR ;

SICKINGER, A .

WEAR, 1993, 162 :529-537

[3] Effect of At and Cr addition on tribological behaviour of HVOF and APS nanostructured WC-Co coatings [J].

Basak, A. K. ;

Achanta, S. ;

De Bonte, M. ;

Celis, J. P. ;

Vardavoulias, M. ;

Matteazzi, P. .

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING, 2007, 85 (06) :310-315

[4] Erosion-corrosion properties of different WC-Co-Cr coatings deposited by the HVOF process - influence of metallic matrix composition and spray powder size distribution [J].

Berget, J. ;

Rogne, T. ;

Bardal, E. .

SURFACE & COATINGS TECHNOLOGY, 2007, 201 (18) :7619-7625

[5]

BOUAIFI B, 1995, P ITSC 95 KOB, P632

[6]

Cantera EL, 1998, MATER LETT, V37, P201, DOI 10.1016/S0167-577X(98)00092-5

[7] Effects of carbide size and Co content on the microstructure and mechanical properties of HVOF-sprayed WC-Co coatings [J].

Chivavibul, Pornthep ;

Watanabe, Makoto ;

Kuroda, Seiji ;

Shinoda, Kentaro .

SURFACE & COATINGS TECHNOLOGY, 2007, 202 (03) :509-521

[8]

IIAVSKY J, 1994, P 7 THERM SPRAY C BO, P709

[9] The effect of laser power and traverse speed on microstructure, porosity, and build height in laser-deposited Ti-6Al-4V [J].

Kobryn, PA ;

Moore, EH ;

Semiatin, SL .

SCRIPTA MATERIALIA, 2000, 43 (04) :299-305

[10] Effect of adding WC powder to the feedstock of WC-Co-Cr based HVOF coating and its impact on erosion and abrasion resistance [J].

Maiti, A. K. ;

Mukhopadhyay, N. ;

Raman, R. .

SURFACE & COATINGS TECHNOLOGY, 2007, 201 (18) :7781-7788

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