Tribological performance of α-Fe(Cr)-Fe2B-FeB and α-Fe(Cr)-h-BN coatings obtained by laser melting

被引：56
|
作者：
Avril, L
Courant, B
Hantzpergue, J
机构：
[1] ENSAM, Lab Procedes Mat Instrumentat, F-49035 Angers 01, France
[2] Inst Rech Genie Civil & Mecan, CRTT, F-44602 St Nazaire, France
来源：
WEAR | 2006年 / 260卷 / 4-5期
关键词：
composite and boride coatings; laser melting; nanoindentation; wear resistance; energy dissipation; temperature effects;
D O I：
10.1016/j.wear.2005.04.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
alpha-Fe(Cr)-h-BN and alpha-Fe(Cr)-Fe2B-FeB coatings on X30Cr13 stainless steel are synthesized by laser melting with incorporation of hexagonal boron nitride, or by alloying of boron. The additive powders are deposited on steel before pulsed irradiation by Nd-YAG laser beam. The solidification structures of the obtained coatings are investigated by optical microscopy and X-ray diffractometry. The mechanical properties are investigated by nanoindentation and the tribological behaviour is characterized on pin-on-disc tribometer, under dry-sliding conditions with different loads and a temperature range 25-500 degrees C. h-BN-alpha-Fe(Cr) and Fe2B-alpha-Fe(Cr) coatings have average hardnesses 10.0 and 14.5 GPa, respectively, while hardness of untreated stainless steel is 4.2 GPa. In comparison with this untreated steel, the sliding contact on ceramic (ruby) of such coating shows a lower coefficient friction and a definitively better wear resistance. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：351 / 360
页数：10
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