Friction Behavior of HVOF Thermal Spray Coating of Micron Size WC-Co Powder

2007 ◽  
Vol 26-28 ◽  
pp. 1325-1328 ◽  
Author(s):  
Tong Yul Cho ◽  
Jae Hong Yoon ◽  
Kil Su Kim ◽  
Ki Oh Song ◽  
Yun Kon Joo ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Machine Component ◽  
Friction Behavior ◽  
Promising Candidate ◽  
Hvof Thermal Spray ◽  
Hvof Spray ◽  
Micron Size ◽  
Hard Chrome

High velocity oxy-fuel (HVOF) spray coating of WC base cermet has been studied as a promising candidate in some hard coating area for a replacement of the long traditional electrolytic hard chrome (EHC) plating, which has been raising public health and environmental problems. Micron size WC-Co (mWC-Co) has been coated on Inconel 718 substrate by HVOF thermal spray coating process. Surface properties of coating layer and friction behavior have been investigated for durability improvement coating on the sliding machine component surface.

Friction Behavior of HVOF Thermal Spray Coating of Micron Size WC-Co Powder

2007 ◽  
pp. 1325-1328 ◽  
Author(s):  
Tong Yul Cho ◽  
Jae Hong Yoon ◽  
Kil Su Kim ◽  
K.O. Song ◽  
Y.K. Joo ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Friction Behavior ◽  
Hvof Thermal Spray ◽  
Micron Size

scholarly journals Pengaruh Proses Oksidasi Lapisan Metal Matrix Composite pada Substrat SS316

2019 ◽  
Vol 4 (2) ◽  
pp. 277
Author(s):  
Erie Martides ◽  
Candra Dewi Romadhona ◽  
Djoko Hadi Prajitno ◽  
Budi Prawara
Keyword(s):  
Metal Matrix Composite ◽  
Thermal Spray ◽  
Matrix Composite ◽  
High Velocity ◽  
Metal Matrix ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
High Velocity Oxygen Fuel ◽  
Hvof Thermal Spray ◽  
Oxygen Fuel

Material SS316 seringkali digunakan untuk komponen yang bekerja pada temperatur tinggi dengan resiko mengalami oksidasi yang menyebabkan penurunan sifat material dan umur pakai dari komponen. Deposisi Metal Matrix Composite (MMC) NiCr+Cr3C2+Al2O3 dan NiCr+WC12Co+Al2O3 menggunakan metode High Velocity Oxygen Fuel (HVOF) thermal spray coating dengan parameter konstan dilakukan sebagai proses perlakuan pada permukaan SS316 untuk meningkatkan nilai kekerasan dan ketahanan terhadap oksidasi.  Tujuan penelitian ini adalah untuk mengetahui pengaruh proses oksidasi lapisan MMC pada material substrat SS316. Proses oksidasi dilakukan dengan variasi temperatur 500° dan 600°C, penahanan temperatur selama 6 jam, kemudian diteruskan dengan karakterisasi serta perhitungan laju oksidasi. Hasil penelitian menunjukkan spesimen MMC NiCr+Cr3C2+Al2O3 yang dilakukan proses oksidasi pada suhu 500°C memiliki laju oksidasi terendah yaitu 6,67 x 10-7 gram/mm2 jam. 

Studying Adhesion between a 67Ni18Cr5Si4B Alloy Powder Coating Produced with the High Velocity Oxygen Fuel Thermal Spray Method HVOF and a Substrate Surface of a Worn C45 Steel Shaft

2020 ◽  
Vol 854 ◽  
pp. 117-125
Author(s):  
Văn Chien Dinh ◽  
Tuan Hai Nguyen ◽  
Khac Linh Nguyen
Keyword(s):  
Thermal Spray ◽  
Alloy Powder ◽  
Substrate Surface ◽  
Spray Coating ◽  
Powder Coating ◽  
Thermal Spray Coating ◽  
Modern Technology ◽  
Technological Parameters ◽  
Steel Shaft ◽  
Hvof Spray

Nowadays, thermal spray coatings are used to enhance mechanical properties of the material. One of the technologies used to produce thermal spray coating is HVOF spray technology. This is the most advanced and modern technology which has been widely used in the industry due to its flexibility and ability to create coatings with better adhesion in comparison with other thermal spray methods. This article presents some empirical findings from applying the 67Ni18Cr5Si4B alloy powder coating onto C 45 steel shaft by HVOF spray technology. It also analyzes the influence of some technological parameters on the adhesion of the coating. As a result, the parameters of HVOF spray technology are obtained suitable for recovering worn axis-sized workpieces.

scholarly journals KETAHANAN MULUR BAJA SUS 304 HASIL PELAPISAN METAL MATRIX COMPOSITE NiCr+ Cr3C2 DENGAN METODA HVOF

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Muhammad Luthfi Naufal ◽  
Muhammad Waldi ◽  
Djoko Hadi Prajitno
Keyword(s):  
Metal Matrix Composite ◽  
Thermal Spray ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
High Velocity Oxygen Fuel ◽  
Hvof Thermal Spray ◽  
Boiler Tubes ◽  
Oxygen Fuel

KETAHANAN MULUR DAN OKSIDASI SIKLIK BAJA SUS 304 HASIL PELAPISAN METAL MATRIX COMPOSITE NiCr+Cr3C2 DENGAN METODA HVOF. Telah dilakukan proses deposisi Metal Matrix Composite coating 60% NiCr + 30% Cr3C2+ 10% Al2O3 dan 60% NiCr + 40% Cr3C2 dengan menggunakan teknik High Velocity Oxygen Fuel (HVOF) Thermal Spray Coating, pada permukaan baja SUS 304. Tujuan pelapisan untuk meningkatkan ketahanan mulur dan oksidasi siklik dalam aplikasi pipa boiler tubes PLTU. Pengujian creep telah dilakukan pada temperatur 550oC dengan pembebanan sebesar 0.4 σy dan 0.6 σy (yield strength) selama 30240 menit (21 hari). Pengujian oksidasi siklik dengan variasi temperatur 600oC, 700oC dan 800oC selama 1 jam dalam tubes furnace dan pendinginan diluar selama 15 menit dalam 1 siklus dan di lakukan sebanyak 5 siklus. Spesimen coating Metal Matrix Composite (MMC) 3 komponen  merupakan coating yang rekomendasikan dalam aplikasi pipa boiler tubes PLTU merupakan laju mulur yang paling rendah sebesar 0.000148917%/jam. Spesimen coating MMC 3 komponen pada temperatur 600oC memiliki perubahan berat oksida, ketebalan coating, dan senyawa oksida yang terbentuk paling rendah.Kata kunci: SUS 304, HVOF Thermal Spray Coating, Metal Matrix Composite, ketahanan mulur, oksidasi siklik.

A Study on the Properties, Friction, Wear and Adhesion of HVOF Thermal Spray Coating of Micron Size Co-Alloy Powder

2009 ◽  
Vol 75 ◽  
pp. 19-24 ◽  
Author(s):  
Tong Yul Cho ◽  
Jae Hong Yoon ◽  
Ki Oh Song ◽  
Yun Kon Joo ◽  
Jae Young Cho ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Surface Temperature ◽  
Surface Properties ◽  
High Speed ◽  
Wear Behavior ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Sliding Surface ◽  
Hvof Thermal Spray ◽  
Micron Size

High velocity oxygen fuel (HVOF) thermal spray coating of micron size (μ) T800 powder has been studied for the durability improvement of sliding machine components. The optimal coating process (OCP), surface properties, friction, wear behavior and adhesion of HVOF T800 coating have been investigated. The temperature dependence of friction coefficient and wear behavior have been studied at 25°C and at an elevated temperature 538°C (1,000°F) for the study of the temperature effects on FC and wear behaviors of the coating and for the application on high speed air bearing spindle which operates with no lubricants. The OCP was determined from the best surface properties of the 16 OCP searching coatings designed by the Taguchi experimental program of four spray parameters with three levels: a hydrogen flow rate (FR) of 38-42 FMR (1 FMR=12scfh=9.44×10-5 m/s), oxygen FR of 65-70 FMR and feed rate of 30 g/min, and a spray distance of 5 inch. Hardness, roughness and porosity observed from the 16 coatings were 560-640 Hv (5488-6272 MPa), 2.2-3.0 μm and 0.01-0.04% respectively. Friction coefficient (FC) decreased from 5.5-7.0 to 4.8-6.0 with increasing the sliding surface temperature from 25°C to 538°C because of the higher lubrication effect of Co oxide debris at the higher temperature. Wear trace of the coating and counter sliding SUS 304 surface decreased to more than a half with increasing the sliding surface temperature from 25°C to 538°C. Tensile bond strength (TBS) and tensile fracture location (TFL) of Ti64 / T800 were 8,770 psi (60.5 MPa) and near the middle of the coating respectively. Bond coat NiCr did not influence on the TBS of the coating. The adhesion between Ti64 substrate and T800 coating (Ti64/T800) was stronger than the cohesion strength 8,770 psi (60.5 MPa) of T800 coating. These showed that Ti64/T800 coating was recommendable for durability improvement coating on high speed spindle of Ti64.

scholarly journals Thermal Stress Analysis of FeCrAlY Powder in HVOF Thermal Spray Coating Using ANSYS

2012 ◽  
Vol 38 ◽  
pp. 321-329 ◽  
Author(s):  
D.H. Agrawal ◽  
J.R. Patel ◽  
H.G. Rana ◽  
C.P. Patel
Keyword(s):  
Thermal Stress ◽  
Stress Analysis ◽  
Thermal Spray ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Thermal Stress Analysis ◽  
Hvof Thermal Spray

Tribo-performance of 80%WC + 20%TIO2 HVOF thermal spray coating on SS-404

2020 ◽  
Vol 33 ◽  
pp. 1680-1689
Author(s):  
Unzarul Haque ◽  
Gurmeet Singh ◽  
Harjot Singh Gill ◽  
Satbir S. Sehgal
Keyword(s):  
Thermal Spray ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Hvof Thermal Spray
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