Tungsten Carbide-Cobalt Coatings for Industrial Applications

2000 ◽  
Author(s):  
M. Dorfman ◽  
J. DeFalco ◽  
J. Karthikeyan
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Tungsten Carbide ◽  
Gas Flow ◽  
Deposition Efficiency ◽  
Industrial Applications ◽  
Spray Parameters ◽  
Coating Characteristics ◽  
Steel Substrates

Abstract This paper compares the coating characteristics of two HVOF processes: air-cooled converging-nozzle Diamond Jet (DJ) spraying and Hybrid 2600 air/water-cooled converging/diverging technology. WC-Co coatings were deposited on steel substrates using different combinations of spray parameters, gas flow ratios, and cooling gas types. The coatings were then examined and tested to determine the extent to which microstructure, hardness, surface roughness, wear resistance, and deposition efficiency can be controlled. In addition to investigating process relationships, the paper also addresses the issues of practicality and cost.

scholarly journals PERFORMANCE OF COATED TUNGSTEN CARBIDE IN MILLING COMPOSITE BOARDS

Wood Research ◽  
2021 ◽  
Vol 66 (4) ◽  
pp. 606-620
Author(s):  
PUTRA PANGESTU KIDUNG TIRTAYASA ◽  
WAYAN DARMAWAN ◽  
DODI NANDIKA ◽  
IMAM WAHYUDI ◽  
LUMONGGA DUMASARI ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
Tungsten Carbide ◽  
Chip Formation ◽  
Noise Level ◽  
Numerical Control ◽  
Wood Plastic Composite ◽  
Tungsten Carbides ◽  
Plastic Composite ◽  
Coated Carbide

The purpose of this research was to analyze the performance (wear resistance, surface roughness, chip formation, and noise level) of AlCrN, TiN, and TiAlN coated tungsten carbides in cutting composite boards. The composite boards of wood plastic composite, laminated veneer lumber, andorientedstrand board were cut by the coated tungsten carbide tools in a computer numerical control router. The results show that the differences in structure among the composite boards resulted in the difference in clearance wear, chip formation, surface roughness, and noise level phenomenon. The abrasive materials in wood plastic composite generated the highest clearance wear on the coated carbide tools tested. TiAlN coated carbide tool provided better wear resistance, smoother composite boards surfaces, and lower noise levels.

In-Flight Particle Characteristics of Plasma-Sprayed Dense Yttria Stabilized Zirconia

1998 ◽  
Author(s):  
L. Leblanc ◽  
C. Moreau
Keyword(s):  
Monitoring System ◽  
Particle Temperature ◽  
Deposition Efficiency ◽  
The State ◽  
Spray Parameters ◽  
Zirconia Powder ◽  
Integrated Optical ◽  
Coating Characteristics ◽  
Coating Microstructure ◽  
Plasma Sprayed

Abstract The influence of input spray parameters on the state of plasma-sprayed zirconia powder is studied. The particle temperature, velocity and diameter are measured using an integrated optical monitoring system. The monitoring system allows the investigation of the particles behavior in the spray jet. The collected information is correlated to coating characteristics such as deposition efficiency, microstructure and thermal diffusivity. Results show that, by monitoring the state of sprayed particles, a better understanding of the coating microstructure and properties can be achieved.

scholarly journals Plasma Spraying and Characterization of Tungsten Carbide-Cobalt Coatings by the Water-Stabilized System WSP

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
Pavel Ctibor ◽  
Micheala Kašparová ◽  
Jeremy Bellin ◽  
Emmanuel Le Guen ◽  
František Zahálka
Keyword(s):  
Tungsten Carbide ◽  
Cross Sections ◽  
Mechanical Tests ◽  
Influence Of Spray Parameters ◽  
Spray Parameters ◽  
Wear Performance ◽  
Plasma Sprayed ◽  
Steel Substrates

Tungsten carbide-cobalt powders (WC-17wt% Co) were plasma sprayed by a water-stabilized system WSP. Experiments with variable feeding distances and spray distances were carried out. Thinner coatings were deposited on carbon steel substrates and thicker coatings on stainless steel substrates to compare different cooling conditions. Basic characterization of coatings was done by XRD, SEM, and light microscopy plus image analysis. Microhardness was measured on polished cross-sections. The main focus of investigation was resistance against wear in dry as well as wet conditions. The appropriate tests were performed with set-ups based on ASTM G65 and G75, respectively. The influence of spray parameters onto coating wear performance was observed. The results of mechanical tests were discussed in connection with changes of phase composition and with the quality of the coating's microstructure. The results show that for obtaining the best possible WC-17Co coating with WSP process, from the viewpoint of wear resistance, the desired parameters combination is long feeding distance combined with short spray distance.

scholarly journals Properties of TiC Coating by Pulsed DC PACVD

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mahboobeh Azadi ◽  
Alireza Sabour Rouhaghdam ◽  
Shahrokh Ahangarani
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Wear Resistance ◽  
Flow Rate ◽  
Gas Flow ◽  
High Hardness ◽  
Grazing Incidence ◽  
Knoop Hardness ◽  
Flow Rate Ratio ◽  
Pulsed Dc

In the PACVD technique, temperature and gas flow rate are two important parameters affecting the coating characteristics. Effect of these parameters on mechanical behaviors of TiC coating that was deposited on hot work tool steel (H13) was investigated in this paper. We analyzed TiC coating composition and structure with grazing incidence X-ray diffraction (GIXRD) and Fourier transformation infrared spectroscopy (FTIR). The mechanical properties of the coatings, such as microhardness, wear resistance, and surface roughness, were studied with Knoop hardness indentation, pin on disk wear tests, and atomic force microscopy, respectively. When the deposition temperature decreased from 490°C to 450°C and the CH4 to TiCl4 flow rate ratio was also increased from 1.5 to 6, TiC coating color changed from dark gray to silver. The best mechanical properties such as a high hardness (27 GPa), wear resistance, and low surface roughness were related to the coating that was deposited at 450°C.

A Taguchi Design Study for Optimisation of Plasma Sprayed Hydroxyapatite Coatings

2013 ◽  
Vol 773-774 ◽  
pp. 590-601
Author(s):  
Md Fahad Hasan ◽  
James Wang ◽  
Christopher C. Berndt
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Flow Rate ◽  
Feed Rate ◽  
Gas Flow ◽  
Deposition Efficiency ◽  
Gas Flow Rate ◽  
Powder Feed Rate ◽  
Hydroxyapatite Coatings ◽  
Plasma Sprayed

Plasma sprayed hydroxyapatite coatings were deposited onto mild steel substrates. A Taguchi L9design of experiment protocol was used to optimise the coating process parameters. The effect of three factors: (i) power and secondary gas flow rate (X1), (ii) powder feed rate and carrier gas flow rate (X2), and (iii) stand-off distance (X3) on the coating responses was studied. The responses of the plasma sprayed hydroxyapatite coatings were evaluated in terms of porosity, deposition efficiency, microhardness, crystallinity, and surface roughness. A regression analysis established relationships between process parameters and responses. Higher power, lower powder feed rate and the middle stand-off distance of 11 cm lead to optimum attributes of low porosity, high deposition efficiency, high microhardness, high crystallinity, and high surface roughness.

COLMONOY No. 83 PTA

Alloy Digest ◽  
1995 ◽  
Vol 44 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Compressive Strength ◽  
Physical Properties ◽  
Tungsten Carbide ◽  
Tensile Properties ◽  
Powder Metal ◽  
Application Method ◽  
Plasma Transferred Arc ◽  
Transferred Arc ◽  
Nickel Base

Abstract COLMONOY No. 83 PTA is a nickel-base hard surfacing alloy containing tungsten carbide. The application method is plasma transferred arc and the application is designed to protect extrusion screws. This datasheet provides information on composition, physical properties, microstructure, hardness, tensile properties, and compressive strength. It also includes information on wear resistance as well as machining and powder metal forms. Filing Code: Ni-493. Producer or source: Wall Colmonoy Corporation.

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