Fretting fatigue properties of WC-Co thermal sprayed NiCrMo steel

被引：4

作者：

Okane, M ^{[1
]}

Shiozawa, K ^{[1
]}

Hiki, M ^{[1
]}

Suzuki, K ^{[1
]}

机构：

[1] Toyama Univ, Fac Engn, Dept Mech & Intellectual Syst Engn, Toyama 9308555, Japan

来源：

FRETTING FATIGUE: ADVANCES IN BASIC UNDERSTANDING AND APPLICATIONS | 2003年 / 1425卷

关键词：

fretting fatigue; NiCrMo steel; spray; WC-Co; HVOF; fretting wear;

D O I：

10.1520/STP10772S

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fretting fatigue tests of NiCrMo steel (JIS SNCM439) sprayed with tungsten carbide with additive of 12% cobalt (WC-Co) by HVOF (High Velocity Oxygen Fuel) were carried out to study the effect of WC-Co coating on fretting fatigue behavior. Since the fatigue strength of the present alloy steel was reduced to about 27% by the effect of fretting, fretting fatigue strength was improved by approximately 30% by WC-Co spraying onto the specimen. The tangential force coefficient, which is tangential force measured during the fretting fatigue tests divided by contact load, behaviors of WC-Co sprayed specimen were different form those of the non-sprayed specimen. Especially, the tangential force of WC-Co specimen in an early stage of the test indicated significant low value compared with that of non-sprayed specimen and this was caused from good wear resistance of WC-Co layer. Therefore, the initiation of a fretting crack in case of WC-Co sprayed specimens delayed, and crack propagation rate was lower than that of non-sprayed specimen. These were main reasons for the improvement of fretting fatigue strength by-WC-Co. spray.

引用

页码：385 / 399

页数：15

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