Effect of NiCr on dry sliding wear of high carbon iron-molybdenum composite plasma spray coating

2018 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
R.S. Walia ◽  
Shailesh Mani Pandey ◽  
Qasim Murtaza
2015 ◽  
Vol 787 ◽  
pp. 454-459
Author(s):  
K.G. Girisha ◽  
R. Rakesh ◽  
K.C. Anil ◽  
K.V. Sreenivas Rao

The most common industrial needs of coatings are to improve the surface properties such as, wear resistance, corrosion resistance and thermal conductivity/insulation. The use of expensive high strength materials and super alloys can be mitigated by using low grade materials covered with suitable coatings compatible with the media and service. Air plasma spray deposition method is used to achieve dense coating on substrate. The present research work demonstrates the wear properties of Ni-Cr/Micro-ZrO2 coating prepared through air plasma spray deposition (PSD) method. In this process, ZrO2 particulates of average particle size (10-40µm) were sprayed on Ni-Cr coated AISI 410 grade steel substrate. Distribution of ZrO2 particle was found uniform throughout the coating as revealed from SEM microphotographs. Dry sliding wear tests were performed on Pin-On-Disc Tribometer at room temperature with moderate humidity conditions. Significant improvement in wear performance was observed in Ni-Cr/Micro- ZrO2 coating deposited on steel via PSD which was also evident from worn surface morphology.


Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1618 ◽  
Author(s):  
Zhaohuan Song ◽  
Songhao Zhao ◽  
Tao Jiang ◽  
Junjie Sun ◽  
Yingjun Wang ◽  
...  

In this work, a multiphase microstructure consisting of nanobainte, martensite, undissolved spherical carbide, and retained blocky austenite has been prepared in an Al-alloyed high carbon steel. The effect of the amount of nanobainite on the dry sliding wear behavior of the steel is studied using a pin-on-disc tester with loads ranging from 25–75 N. The results show that, there is no significant differences in specific wear rate (SWR) for samples with various amounts of nanobainite when the normal load is 25 N. While, the SWR firstly decreases and then increases with increasing the amount of nanobainite, and the optimum wear resistance is obtained for samples with 60 vol.% nanobainite, when the applied load increases to 50 and 75 N. The improved wear resistance is attributed to the peak hardness increment resulted from the transformation of retained austenite to martensite, work hardening, along with amorphization and nanocrystallization of the worn surface. In addition, the highest toughness of the samples with 60 vol.% nanobainite is also proven to play a positive role in resisting sliding wear. EDS (energy dispersion spectrum) and XRD (X-ray diffraction) examinations reveal that the predominant failure mechanism is oxidative wear.


2010 ◽  
Vol 52 (4) ◽  
pp. 252-256 ◽  
Author(s):  
Serkan Özel ◽  
Hüseyin Turhan

2016 ◽  
Vol 58 (7-8) ◽  
pp. 640-643 ◽  
Author(s):  
Ilyas Istif ◽  
Mehmet Tunc Tuncel

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