HVOF-Deposited WCCoCr as Replacement for Hard Cr in Landing Gear Actuators

被引：66

作者：

Agueero, A. ^{[1
]}

Camon, F. ^{[1
]}

Garcia de Blas, J. ^{[1
]}

del Hoyo, J. C. ^{[1
]}

Muelas, R. ^{[1
]}

Santaballa, A. ^{[1
]}

Ulargui, S. ^{[1
]}

Valles, P. ^{[1
]}

机构：

[1] Inst Nacl Tecn Aeroespacial, Madrid 28850, Spain

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2011年 / 20卷 / 06期

关键词：

adhesion; coatings; fatigue; hard Cr replacement; HVOF; landing gear; liquid immersion; microstructure; morphology; particle size; salt fog corrosion; WCCoCr; wear resistance; THERMAL SPRAY COATINGS; WC-CO COATINGS; STRENGTH; FATIGUE; CHROME; SIZE; WEAR;

D O I：

10.1007/s11666-011-9686-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

WCCoCr coatings deposited by HVOF can replace hard Cr on landing gear components. Powders with two different WC particle sizes (micro and nano-) and geometries have been employed to study the effects on the coating's properties. Moreover, coatings produced employing two sets of parameters resulting in high and low flame temperatures have been evaluated. Minor differences in microstructure and morphology were observed for the two powders employing the same spraying parameters, but the nano-sized powder exhibited a higher spraying efficiency. However, more significant microstructural changes result when the low- and high-energy spray parameters are used. Moreover, results of various tests which include adhesion, wear, salt fog corrosion resistance, liquid immersion, and axial fatigue strength, indicate that the coatings produced with high-energy flame are similar in behavior. On the other hand, the nanostructured low-energy flame coating exhibited a significantly lower salt fog corrosion resistance.

引用

页码：1292 / 1309

页数：18

共 43 条

[1] ELECTROCHEMICAL AND LONG-TERM CORROSION STUDIES OF SEVERAL ALLOYS IN BARE CONDITION AND PLASMA SPRAYED WITH CR2O3 [J].