A spherical surface coating thickness model for a robotized thermal spray system

2019 ◽  
Vol 59 ◽  
pp. 297-304 ◽  
Author(s):  
Yanjun Zhang ◽  
Wenbo Li ◽  
Chao Zhang ◽  
Hanlin Liao ◽  
Yicha Zhang ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Coating Thickness ◽  
Surface Coating ◽  
Spherical Surface ◽  
Spray System

Simulation of Thermal Spray Process Based on Particle Tracing Method

2000 ◽  
Author(s):  
K. Wada ◽  
M. Ito ◽  
M. Takahashi ◽  
K. Takaishi
Keyword(s):  
Thermal Spray ◽  
Coating Thickness ◽  
Computer Aided Design ◽  
Simulation Method ◽  
Work Piece ◽  
Stainless Steel 316L ◽  
Particle Tracing ◽  
Computer Aided ◽  
Thermal Spray Processes ◽  
Tracing Method

Abstract As applications of thermal spray processes are expanding, the importance of computer-aided design systems and computer-aided engineering systems for these processes has been growing. The principal objective of this study is to propose a new analytic method for the prediction of coating thickness and deposition efficiency. This method is called the particle tracing method and is based on the Monte Carlo simulation method. In order to evaluate the validity of this model, several tests were carried out. The same stainless steel 316L layers coated by the HP/HVOF process (TAFA JP-5000) were used throughout each test. First, spray patterns were observed which had formed on flat-plate specimens from various spray gun angles. Coating thickness distributions on several curved planes were consequently investigated. Finally, the coating process for a blade of a compressor in a gas turbine was simulated. In the right of the results of these experiments, it is summarized that the calculated values of the coating thickness obtained by our method are in good agreement with experimental values. The accuracy is within 10% of the maximum thickness value in each specimen, except for at the edge of the work-piece. In conclusion, the particle-tracing method can be applied to the fundamental analytic model in the CAD or CAE system for thermal spray processes.

scholarly journals A First Application of Thermographic Phosphors in a Marine Two-Stroke Diesel Engine for Surface Temperature Measurement

2014 ◽  
Author(s):  
Fahd Abou Nada ◽  
Johan Hult ◽  
Christoph Knappe ◽  
Mattias Richter ◽  
Stefan Mayer ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Coating Thickness ◽  
Surface Coating ◽  
Cylinder Wall ◽  
Load Range ◽  
Marine Research ◽  
Surface Temperature Measurement ◽  
Thermographic Phosphors ◽  
Phosphor Thermometry ◽  
First Time

Phosphor thermometry is applied for the first time in a large-bore two-stroke diesel engine. The work proves the practicality of phosphor thermometry in large-bore engines. The experiments were conducted on the MAN 4T50ME-X marine research engine equipped with an optical cylinder head. By employing a thin surface coating of CdWO4 phosphor, cycle resolved temperature measurements of the cylinder wall were obtained. Motored and fired engine operations were tested at engine loads covering the low and medium engine load range. Phosphor thermometry proved to be successful in retrieving the temperature with standard deviations ranging around 1–8 K. Experimental considerations like detector linearity, coating thickness and an automated phosphor calibration routine will be addressed.

Thermal Spray for Corrosion Control: A Competitive Edge for Commercial Shipbuilding

1995 ◽  
Vol 11 (01) ◽  
pp. 53-55
Author(s):  
Frank S. Rogers
Keyword(s):  
Thermal Spray ◽  
Marine Environment ◽  
Thermal Spraying ◽  
Spray Coating ◽  
Cost Effective ◽  
Thermal Spray Coating ◽  
Coating System ◽  
Protection Mechanism ◽  
Arc Spray ◽  
Spray System

Thermal spraying of steel with aluminum to protect it from corrosion is a technology that has been proven to work in the marine environment. The thermal spray coating system includes a paint sealer that is applied over the thermally sprayed aluminum; this extends the service life of the coating, and provides color to the end product. The thermal spray system protects steel both through the principle of isolation (as in painting) and galvanization (as in galvanizing). With this dual protection mechanism, steel is protected from corrosion even when the coating is damaged. The thermal sprayed aluminum coating system has proven to be the most cost-effective corrosion protection system for the marine environment. Until recently, however, the initial cost of application has limited its use for general application. Today a new arc spray technology has reduced the application cost of thermal spraying aluminum to below that of painting. Commercial shipbuilders could use this technology to enhance their market position in the marine industry.

Development of Thermal Spray Map for Liquid Feeding Thermal Spray System

2017 ◽  
Vol 866 ◽  
pp. 418-421
Author(s):  
Noppakun Sanpo ◽  
Jirasak Tharajak
Keyword(s):  
Data Mining ◽  
Particle Size ◽  
Thermal Spray ◽  
Experimental Work ◽  
Research Work ◽  
Reference Points ◽  
Range Data ◽  
Spray System ◽  
Liquid Feeding ◽  
Set Up

This research work exhibits a procedure to classify and reorder thermal spray data point so that relationships and correlations between competing processes and materials can be identified. The broad range data mining of published experimental work was performed to create thermal spray map (TS map). A single TS map displayed the correlation between standoff distance (SOD) and feeding particle size is mainly focused. The discussion and evaluation of TS map was taken place. These data mining could be useful to use and/or adapt as reference points for the thermal spray experiment set up in the future.

THE EFFECT OF COATING THICKNESS ON FATIGUE PROPERTIES OF STEEL THERMALLY SPRAYED WITH Ni-BASED SELF-FLUXING ALLOY

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3599-3604 ◽  
Author(s):  
HIROYUKI AKEBONO ◽  
JUN KOMOTORI ◽  
HIDETO SUZUKI
Keyword(s):  
Fatigue Strength ◽  
Thermal Spray ◽  
Coating Thickness ◽  
Volume Fraction ◽  
Steel Substrate ◽  
Fatigue Cracks ◽  
Spray Coating ◽  
Maximum Size ◽  
Thermal Spray Coating ◽  
Fatigue Properties

The Thermal spraying is one of the most popular surface coating techniques. To achieve the most efficient use of this technique in practice, it is very important to clarify the fatigue properties of steel coated with a thermal spray coating. In this study, to clarify the effects of coating thickness on the fatigue properties of the steel substrate, three types of sprayed specimens with different coating thickness (0.2, 0.5 and 1.0mm) were prepared and fatigue tests were carried out. Coating thickness strongly affected the fatigue properties; the thinner the coating thickness, the higher the fatigue strength. Fatigue crack propagation behaviors were observed. Accordingly the fatigue cracks propagated through many defects on the coated surface. The sizes and number of the coating defects were determined by coating thickness; the thicker the coating thickness, the larger the defect and number. Therefore, the sprayed specimens with thinner coatings indicated higher fatigue strength. Furthermore, estimations of the fatigue strength were performed by using Murakami's equation. The fatigue strengths of thermal spray coated specimens were estimated by three parameters; (i) maximum size of coating defects estimated by statistics of extreme value, (ii) hardness of the matrix and (iii) volume fraction of coating defects.

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