1 Tianjin Key Laboratory of High Speed Cutting and Precision Processing, Tianjin University of Technology and Education, Tianjin 300222, China 2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
The multilayered composite WC-Co/MoS2-Ni self-lubricating coatings were prepared by detonation gun spraying technology. The coating microstructure, element distribution, adhesive strength, and tribological properties were studied systematically. The results show that a little of MoS2 is oxidized and decomposed into gas of SO2 during the high-temperature spraying process. The SO2 left in the coating and can form into the micro porosities. The friction coefficient of the WC-Co coating first increases rapidly in the initial running-in phase, and then gradually increases slightly after entering into the steady-state phase; whereas the friction coefficient of multilayer composite coating steps in the steady-state phase soon and starts to decline gradually when the top WC-Co coating became perforated. By comparison, the coating cohesion declines slightly after adding the self-lubricating layer MoS2-Ni, but the friction coefficient decreases by about 40%, and the wear resistance is also improved slightly.
GE Z , LI S , DUAN D L , et al. Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon[J]. Wear, 2015, 330-331 (5): 348- 353.
2
AFZAL M , NUSAIR K A , BEN M T , et al. Effect of laser melting on plasma sprayed WC-12 wt.% Co coatings[J]. Surface and Coatings Technology, 2015, 266 (3): 22- 30.
3
GENG Z , HOU S , SHI G , et al. Tribological behaviour at various temperatures of WC-Co coatings prepared using different thermal spraying techniques[J]. Tribology International, 2016, 104 (12): 36- 44.
4
NAHVI S M , JAFARI M . Microstructural and mechanical properties of advanced HVOF-sprayed WC-based cermet coatings[J]. Surface and Coatings Technology, 2016, 286 (1): 95- 102.
WANG T G , SONG B H , HUA W G , et al. Influence of process parameters on the performance uniformity of detonation gun sprayed WC-Co coatings[J]. Acta Metallurgica Sinica, 2011, 47 (1): 115- 122.
6
WANG T G , ZHAO S S , HUA W G , et al. Design of a separation device used in detonation gun spraying system and its effects on the performance of WC-Co coatings[J]. Surface and Coatings Technology, 2009, 203 (12): 1637- 1644.
doi: 10.1016/j.surfcoat.2008.12.012
7
WANG T G , ZHAO S S , HUA W G , et al. Estimation of residual stress and its effects on the mechanical properties of detonation gun sprayed WC-Co coatings[J]. Materials Science and Engineering:A, 2010, 527 (3): 454- 461.
doi: 10.1016/j.msea.2009.10.009
LI Q Q , YIN G L , ZHENG C H , et al. Effect of TiN addition on the microstructure and performance of MoS2-based composite films[J]. Tribology, 2011, 31 (1): 40- 44.
QIN X P , KE P L , WANG A Y . Effect of bias and test environments on tribological behavior of MoS2-Ti composite coatings[J]. Tribology, 2013, 33 (2): 162- 168.
WANG C C , WANG R C , PENG C Q , et al. Research progress of metallic solid self-lubricating composites[J]. Chinese Journal of Nonferrous Metals, 2012, 22 (7): 1945- 1955.
11
DU H , SUN C , HUA W G , et al. Fabrication and evaluation of D-gun sprayed WC-Co coating with self-lubricating property[J]. Tribology Letters, 2006, 23 (3): 261- 266.
doi: 10.1007/s11249-006-9119-3
12
DU H , SUN C , HUA W G , et al. Structure, mechanical and sliding wear properties of WC-Co/MoS2-Ni coatings by detonation gun spray[J]. Materials Science and Engineering:A, 2007, 445-446 (2): 122- 134.
13
DU H , SUN C , GONG J , et al. Deposition and characterization of D-gun pprayed WC-Co coating with self-lubricating property[J]. Materials Science Forum, 2007, 544-545 (1): 215- 218.
14
WANG T G , LIU Y M , WANG Q M , et al. Influence of residual stress on the adhesive behavior of detonation gun sprayed WC-Co coatings[J]. Current Applied Physics, 2012, 12, 59- 62.
15
WANG T G , JEONG D , LIU Y M , et al. Study on nanocrystalline Cr2O3 films deposited by arc ion plating:Ⅱ. Mechanical and tribological properties[J]. Surface and Coatings Technology, 2012, 206 (1): 2638- 2644.
16
WONG K C , LU X , COTTER J , et al. Surface and friction characterization of MoS2 and WS2 third body thin films under simulated wheel/rail rolling-sliding contact[J]. Wear, 2008, 264, 526- 534.
doi: 10.1016/j.wear.2007.04.004
17
WANG X , XING Y M , MA S L , et al. Microstructure and mechanical properties of MoS2/titanium composite coatings with different titanium content[J]. Surface and Coatings Technology, 2007, 201, 5290- 5293.
doi: 10.1016/j.surfcoat.2006.07.124
PAN J L , WANG Y Z , LI F P , et al. Effect of MoS2 coated with Nickel on tribological properties of Ni-based coating[J]. Tribology, 2008, 28 (5): 225- 229.
19
CAO T K , LEI S T , ZHANG M . The friction and wear behavior of Cu/Cu-MoS2 self-lubricating coating prepared by electrospark deposition[J]. Surface and Coatings Technology, 2015, 270 (5): 24- 32.
20
SHI X L , ZHAI W Z , XU Z S , et al. Synergetic lubricating effect of MoS2 and Ti3SiC2 on tribological properties of NiAl matrix self-lubricating composites over a wide temperature range[J]. Materials & Design, 2014, 55 (3): 93- 103.
21
WU G Y , XU C H , XIAO G C , et al. Self-lubricating ceramic cutting tool material with the addition of nickel coated CaF2 solid lubricant powders[J]. International Journal of Refractory Metals and Hard Materials, 2016, 56 (4): 51- 58.
22
LIU X B , MENG X J , LIU H Q , et al. Development and characterization of laser clad high temperature self-lubricating wear resistant composite coatings on Ti-6Al-4V alloy[J]. Materials & Design, 2014, 55 (3): 404- 409.
WANG X P , XIAO J K , ZHANG L , et al. Effect of silver alloy particle size on friction and wear properties of Ag-MoS2 composites[J]. The Chinese Journal of Nonferrous Metals, 2012, 22 (10): 2811- 2817.
FU G Z , KONG D J , ZHANG L . Friction and wear properties of Cr12MoV chromized layer after laser quenching[J]. Journal of Materials Engineering, 2016, 44 (4): 51- 58.
WANG M . Forming mechanisms and tribological properties of FeAlCrBSiNb amorphous coating deposited by high velocity arc spraying[J]. Journal of Aeronautical Materials, 2016, 32 (2): 14- 20.
26
RENZ A , KHADER I , KAILER A . Tribochemical wear of cutting-tool ceramics in sliding contact against a nickel-base alloy[J]. Journal of the European Ceramic Society, 2016, 36 (3): 705- 717.
doi: 10.1016/j.jeurceramsoc.2015.10.032