Effect of heat treatment on wear behavior of HVOF thermally sprayed WC-Co coatings

被引：59

作者：

Asl, Sh. Khameneh

Sohi, M. Heydarzadeh

Hokamoto, K.

Uemura, M.

机构：

[1] Univ Tehran, Fac Engn, Dept Met & Mat Sci, Tehran, Iran

[2] Univ Tabriz, Fac Engn, Dept Mat, Tabriz, Iran

[3] Kumamoto Univ, Shock Wave & Condensed Matter Res Ctr, Kumamoto, Japan

[4] Kumamoto Ind Res Inst, Dept Prod Engn, Kumamoto, Japan

来源：

WEAR | 2006年 / 260卷 / 11-12期

关键词：

WC-17Co; HVOF; heat treatment; wear;

D O I：

10.1016/j.wear.2005.07.013

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A WC-17Co coating was deposited onto ST37 mild steel substrate using HVOF spray technique and then heat treated at different temperatures in a vacuum chamber. The coatings were then evaluated in the as sprayed and heat treated conditions. Inspections by SEM and phase analysis by XRD indicated that some brittle eta (eta) phases were produced at high temperature heat treatments. Generation of these phases increased the coating's hardness and decreased fracture toughness of the coating. Tribological properties were studied under dry condition by using pin on disc machine and diamond metal matrix composite disc as counterface. Wear test results showed that as sprayed deposit had the best wear resistance and its wear mechanism was sharp cutting abrasion. The weight loss in heat treated samples increased by increasing heat treatment temperature and the wear mechanisms gradually changed from cutting to gouging abrasion. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1203 / 1208

页数：6

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