Influence of Process Parameters and Geometry of the Spraying Nozzle on the Properties of Titanium Deposits Obtained in Wire Arc Spraying

2015 ◽  
Vol 1111 ◽  
pp. 211-216
Author(s):  
Bogdan Florin Toma ◽  
Iulian Ionita ◽  
Diana Antonia Gheorghiu ◽  
Lucian Eva ◽  
Costică Bejinariu ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Process Parameters ◽  
High Speed ◽  
Electrical Current ◽  
Electric Arc ◽  
Arc Spraying ◽  
Oxide Content ◽  
Spray Parameters ◽  
Influence Of Process Parameters ◽  
Wire Arc Spraying

Influence of the process parameters and geometry of the spraying nozzle on the properties of titanium deposits obtained in wire arc spraying. Wire arc spraying is a process in which through minor modifications of the spray parameters, they can have a major impact on the coatings properties. In this paper there is presented a study on the influence of process parameters and fluid dynamics of the atomization gas on the properties of titanium deposits (14T - 99.9% Ti). For this there were used three different frontal spraying nozzles, having different geometries, and were varied the spraying gas pressure and the electrical current on three levels. There were evaluated the particles velocity, coating density, chemical composition and characteristic interface between deposition and substrate. Obviously, the high speed of the atomization gas determinate the improving of all properties, but in the same time increased the oxide content in the layer. However, the oxidation can be drastically reduced if the melting and atomization of the wire droplets is produced at the point of formation of the electric arc, and the spraying jet is designed to constrain the electric arc. The assessment of deposits adherence allowed the observation of process parameters that contribute to its improvement.

scholarly journals Influence of process parameters on thermal cycle and intermetallic compounds formation in high speed laser weld-brazing of aluminium-steel angle joints

2018 ◽  
Vol 26 ◽  
pp. 690-699 ◽  
Author(s):  
Guillaume Filliard ◽  
Mohamed El Mansori ◽  
Mathieu De Metz-Noblat ◽  
Christian Bremont ◽  
Anthony Reullier ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
Process Parameters ◽  
Thermal Cycle ◽  
High Speed ◽  
Laser Weld ◽  
Influence Of Process Parameters ◽  
Steel Angle

Effect of Gas Velocity and Particle Velocity on Coating Adhesion in Wire Arc Spraying

1996 ◽  
Author(s):  
X. Wang ◽  
J. Heberlein ◽  
E. Pfender ◽  
W. Gerberich
Keyword(s):  
Bond Strength ◽  
Particle Velocity ◽  
High Speed ◽  
Vision System ◽  
Arc Spraying ◽  
Gas Velocity ◽  
Coating Quality ◽  
Wire Arc Spraying ◽  
Particle Velocities ◽  
The Moment

Abstract In wire arc spraying, atomizing gas velocity and particle velocity are important factors influencing coating quality. A nozzle with secondary gas injection has been developed to increase the gas velocity and to improve coating quality. In this study, wire arc spraying of stainless steel on aluminum substrates has been investigated with the objective of establishing correlations between atomizing gas velocities, particle velocities, particle sizes and coating bond strength. Cold gas velocity is measured with a Pitot tube. Particle velocities are determined from high speed images of particle streaks taken with a Kodak high speed vision system and evaluated using image analysis. Bond strength is measured with pull-off tensile test. Secondary gas atomization clearly leads to improved adhesion due to additional metallurgical bonding between the coating and the substrate achieved through higher particle temperatures at the moment of impact.

High Speed Dry Sliding Tribological Behaviors of Amorphous Fe-Based Alloy Coatings

2012 ◽  
Vol 184-185 ◽  
pp. 1006-1009
Author(s):  
San Ming Du ◽  
Yue Chen ◽  
Yong Zhen Zhang
Keyword(s):  
High Speed ◽  
Steel Substrate ◽  
Electric Arc ◽  
Arc Spraying ◽  
Dry Sliding ◽  
Friction Process ◽  
Wear Rates ◽  
Pin On Disc ◽  
Sprayed Coating ◽  
Amorphous Coatings

In the present study, amorphous coatings on plain steel substrate were prepared by electric arc spraying technique. The high-speed dry sliding tribological properties of the coating were investigated on a pin-on-disc tribo-meter. The results show that amorphous phase generates in the sprayed coating. When the sliding speeds are less than 40m/s, the friction coefficient increases. The friction coefficients decrease with the sliding speed exceeding 60m/s. The wear rates increase with increasing the sliding. Phase transition occurs in the friction process.

Computer Simulation of the Metal Organic Chemical Vapor Deposition of CdTe

1990 ◽  
Vol 198 ◽  
Author(s):  
S. Kang ◽  
T.J. Jasinski ◽  
G.S. Tompa ◽  
R.A. Stall
Keyword(s):  
Computer Simulation ◽  
Chemical Vapor Deposition ◽  
Process Parameters ◽  
Vapor Deposition ◽  
High Speed ◽  
Chemical Vapor ◽  
Operating Conditions ◽  
Organic Chemical ◽  
Influence Of Process Parameters ◽  
Process Gas

ABSTRACTThe optimization of chemical vapor deposition processes requires an understanding of the influence of various process parameters on the deposition of thin films. A recently developed computer simulation tool provides a powerful means to develop this understanding. This paper describes the use of the computer program, FLUENT, to study the gas flow, temperature, and chemical species distributions during the deposition of CdTe. Numerical results are reported for two operating conditions for an EMCORE vertical high-speed rotating disk growth reactor and are compared to experimental data. The influence of process parameters is discussed. The effects of the addition of significant amounts of Hg (several percent) to the process gas is evaluated.

scholarly journals Development of Thermal Spray Processes for Depositing Coatings on Thermoplastics

2021 ◽  
Author(s):  
Kirsten Bobzin ◽  
Wolfgang Wietheger ◽  
Martin Andreas Knoch
Keyword(s):  
Process Parameters ◽  
Signal Transmission ◽  
Thermal Spraying ◽  
Arc Spraying ◽  
Coating Application ◽  
Critical Areas ◽  
Copper Coatings ◽  
Layer Deposition ◽  
Wire Arc Spraying ◽  
Thermal Spray Processes

AbstractThermoplastics combine high freedom of design with economical mass production. Metallic coatings on thermoplastics enable power and signal transmission, shield sensitive parts inside of housings and can reduce the temperature in critical areas by functioning as a heat sink. The most used technical thermoplastics are polyamides (PA), while the described use cases are often realized using Cu. Consequently, several studies tried to apply copper coatings on PA substrates via thermal spraying; so far, this combination is only feasible using an interlayer. In this study, a new approach to metallize thermoplastics via thermal spraying based on validated state-of-the-art predictions of the thermoplastics’ material response at relevant temperatures and strain rates is presented. Using these predictions, high velocity wire-arc spraying was selected as coating process. Furthermore, the process parameters were adapted to realize a continuous coating while also roughening the substrate during coating deposition. The resulting Cu coating on PA6 had a sufficiently high coating adhesion for post-treatment by grinding. The adhesion is achieved by in situ roughening during the coating application. The results indicate that different process parameters for initial layer deposition and further coating buildup are required due to the low thermal stability of PA6.

scholarly journals INFLUENCE OF PROCESS PARAMETERS ON 6065 – T6 ALUMINUM ALLOY USING CNC END MILLING – A FUZZY APPROACH

2020 ◽  
pp. 1-4
Author(s):  
P. Hema ◽  
U. Sainadh ◽  
B.Vinod Kumar
Keyword(s):  
Surface Roughness ◽  
Aluminum Alloy ◽  
Process Parameters ◽  
High Speed ◽  
End Milling ◽  
High Speed Steel ◽  
Depth Of Cut ◽  
Influence Of Process Parameters ◽  
Taguchi Design Of Experiments ◽  
Cnc End Milling

The present work deals with the investigation of performance parameters of surface roughness and material removal rate of the machined parts during milling of Aluminum alloy 6065-T6 using CNC vertical milling machine with High speed steel milling, Carbide tool cutter by optimizing the process parameters such as speed, feed, cutting environment, depth of cut and cutting tool. The experiments are conducted based on Taguchi design of experiments with an orthogonal array (L16) the optimization of process parameters based on performance measures are done by using Fuzzy Logic. Also, the most influential process parameters are finding out by using ANOVA technique. Ideal execution parameters are found for smaller surface roughness and larger MRR utilizing the MINITAB and MATLAB software’s.

scholarly journals High-Speed Laser Cladding on Thin-Sheet-Substrates—Influence of Process Parameters on Clad Geometry and Dilution

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 952
Author(s):  
Niklas Sommer ◽  
Florian Stredak ◽  
Stefan Böhm
Keyword(s):  
Laser Cladding ◽  
Process Parameters ◽  
High Speed ◽  
Continuous Wave ◽  
Thin Sheet ◽  
Production Method ◽  
Metal Powders ◽  
Influence Of Process Parameters ◽  
Target Values ◽  
Directed Energy

Laser-based Directed Energy Deposition (DED-LB) represents a production method of growing importance for cladding and additive manufacturing through the use of metal powders. Yet, most studies utilize substrate materials with thicknesses of multiple millimeters, for which laser cladding of thin-sheet substrates with thicknesses less than 1 mm have only been scarcely studied in the literature. Most studies cover the use of pulsed laser sources, since sheet distortion due to excess energy input is a key problem in laser cladding of thin-sheet substrates. Hence, the authors of the present investigation seek to expand the boundaries of cladding thin-sheet substrates through the use of a high-speed laser cladding approach which utilizes a continuous-wave, ytterbium fiber laser and traverse speeds of 90 mms−1 to clad stainless steel sheets with a thickness of 0.8mm. Furthermore, fundamental process–property relationships for the target values of clad width, clad height, and dilution depth are studied and thoroughly discussed. Additionally, process maps for the target values are established based on manifold experiments, and the significance of process parameters on target values is studied using analysis of variance. The results demonstrate that clad widths as high as 1413 μm and dilution depths as low as 144 μm can be obtained by high-speed laser cladding of thin-sheet substrates. Thus, pathways toward thin-sheet substrates with enhanced performance are opened.

Shaping Parameter Control of High-Speed Cold Roll-Beating Based on Simulation and Regression Analysis

2011 ◽  
Vol 109 ◽  
pp. 517-522
Author(s):  
Ming Shun Yang ◽  
Yan Li ◽  
Qi Long Yuan ◽  
Jian Ming Zheng
Keyword(s):  
Process Parameters ◽  
High Speed ◽  
Groove Depth ◽  
Forming Process ◽  
Influence Of Process Parameters ◽  
Lead Screw ◽  
Cold Roll ◽  
Plastic Forming ◽  
Near Net Shaping ◽  
Net Shaping

High-speed cold roll-beating is a near-net shaping technology in which with the characteristic of metal plastic forming used, revolving roller with high speed is applied to roll and beat the blank shaft, then force mental to flow and form a component profile. In the forming process, matching between the process parameters and the part profile is key to implement and apply the technology. In this paper, the FEM model of the lead screw cold roll-beating forming is built, the ABAQUS software is used to simulate the forming process. Based on the simulation results, the orthogonal test is designed, influence of process parameters on groove depth and bulging height of cold roll-beating process are studied; multivariate regression models of maximum bulging height and groove depth relative to the process parameters are established, and the effectiveness of the models are verified, which is of important guiding significances for forming accurate profile of lead screw by controlling process parameters.

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