TY - GEN
T1 - Effect of bond coat and preheat on the microstructure, hardness, and porosity of flame sprayed tungsten carbide coatings
AU - Winarto, null
AU - Sofyan, Nofrijon Bin Imam
AU - Rooscote, Didi
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/6/15
Y1 - 2017/6/15
N2 - Thermally sprayed coatings are used to improve the surface properties of tool steel materials. Bond coatings are commonly used as intermediate layers deposited on steel substrates (i.e. H13 tool steel) before the top coat is applied in order to enhance a number of critical performance criteria including adhesion of a barrier coating, limiting atomic migration of the base metal, and corrosion resistance. This paper presents the experimental results regarding the effect of nickel bond coat and preheats temperatures (i.e. 200°C, 300°C and 400°C) on microstructure, hardness, and porosity of tungsten carbide coatings sprayed by flame thermal coating. Micro-hardness, porosity and microstructure of tungsten carbide coatings are evaluated by using micro-hardness testing, optical microscopy, scanning electron microscopy, and X-ray diffraction. The results show that nickel bond coatings reduce the susceptibility of micro crack formation at the bonding area interfaces. The percentage of porosity level on the tungsten carbide coatings with nickel bond coat decreases from 5.36 % to 2.78% with the increase of preheat temperature of the steel substrate of H13 from 200°C to 400°C. The optimum hardness of tungsten carbide coatings is 1717 HVN in average resulted from the preheat temperature of 300°C.
AB - Thermally sprayed coatings are used to improve the surface properties of tool steel materials. Bond coatings are commonly used as intermediate layers deposited on steel substrates (i.e. H13 tool steel) before the top coat is applied in order to enhance a number of critical performance criteria including adhesion of a barrier coating, limiting atomic migration of the base metal, and corrosion resistance. This paper presents the experimental results regarding the effect of nickel bond coat and preheats temperatures (i.e. 200°C, 300°C and 400°C) on microstructure, hardness, and porosity of tungsten carbide coatings sprayed by flame thermal coating. Micro-hardness, porosity and microstructure of tungsten carbide coatings are evaluated by using micro-hardness testing, optical microscopy, scanning electron microscopy, and X-ray diffraction. The results show that nickel bond coatings reduce the susceptibility of micro crack formation at the bonding area interfaces. The percentage of porosity level on the tungsten carbide coatings with nickel bond coat decreases from 5.36 % to 2.78% with the increase of preheat temperature of the steel substrate of H13 from 200°C to 400°C. The optimum hardness of tungsten carbide coatings is 1717 HVN in average resulted from the preheat temperature of 300°C.
UR - http://www.scopus.com/inward/record.url?scp=85021443940&partnerID=8YFLogxK
U2 - 10.1063/1.4985486
DO - 10.1063/1.4985486
M3 - Conference contribution
AN - SCOPUS:85021443940
T3 - AIP Conference Proceedings
BT - Green Process, Material, and Energy
A2 - Prasetyo, Hari
A2 - Setiawan, Wisnu
A2 - Suryawan, Fajar
A2 - Nugroho, Munajat Tri
A2 - Widayatno, Tri
A2 - Hidayati, Nurul
A2 - Setiawan, Eko
PB - American Institute of Physics Inc.
T2 - 3rd International Conference on Engineering, Technology, and Industrial Application - Green Process, Material, and Energy: A Sustainable Solution for Climate Change, ICETIA 2016
Y2 - 7 December 2016 through 8 December 2016
ER -