Effect of the Increase in the Entrance Convergent Section Length of the Gun Nozzle on the High-Velocity Oxygen Fuel and Cold Spray Process

2001 ◽  
Vol 10 (3) ◽  
pp. 487-496 ◽  
Author(s):  
K. Sakaki ◽  
Y. Shimizu
Keyword(s):  
Cold Spray ◽  
High Velocity ◽  
High Velocity Oxygen Fuel ◽  
Cold Spray Process ◽  
Spray Process ◽  
Oxygen Fuel

scholarly journals Numerical Analysis of High-Velocity Oxygen Fuel Thermal-Spray Process for Fe-Based Amorphous Coatings

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1533
Author(s):  
Jianxing Yu ◽  
Xin Liu ◽  
Yang Yu ◽  
Haoda Li ◽  
Pengfei Liu ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
High Velocity ◽  
Injection Rate ◽  
Amorphous Coating ◽  
High Velocity Oxygen Fuel ◽  
Alloy Particle ◽  
Coating Structure ◽  
Particle Behavior ◽  
Spray Process ◽  
Oxygen Fuel

High-velocity oxygen fuel (HVOF)-sprayed amorphous alloy coatings usually have advantages of a dense structure that improve their resistance to corrosion, wear, and fatigue in the substrate. The flame flow characteristics and particle behaviors during the spray process have a significant influence on the amorphous coating structure and properties. In this study, a computational fluid dynamics model is enforced to analyze the flame flow and Fe-based amorphous alloy particle behavior in an HVOF spray process. The flame flow temperature, velocity characteristics, and the Fe48Cr15Mo14C15B6Y2 Fe-based amorphous alloy particles’ velocities, temperatures, flight trajectories, and mass concentration distribution characteristics are simulated. Moreover, the effects of the oxygen/fuel ratio, particle morphology parameter, particle-injection rate, and angle on the particle behavior are also investigated. Judging from the simulation results, the optimum amorphous alloy particle size varies between 20 and 30 μm, the shape factor is within the range of 0.9–1, the optimum O/F ratio is 3.4, the optimum injection angle is 45°, and the optimum injection rate is 10 m/s. With these conditions, most of the particles settled toward the centerline of the spray gun and are in a semisolid or solid state before affecting the substrate, giving the materials optimal coating structure and performance.

COLMONOY NO. 43HV

Alloy Digest ◽  
2008 ◽  
Vol 57 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Velocity ◽  
Base Alloy ◽  
Heat Treating ◽  
High Velocity Oxygen Fuel ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Oxygen Fuel

Abstract Colmonoy No. 43HV comprises a nickel-base alloy recommended for hard surfacing parts to resist wear, corrosion, heat, and galling. Deposits that have moderate hardness have increased ductility and slightly less resistance to abrasion than Colmonoy 53HV. Deposits can be finished by grinding or machined with carbide tooling. Colmonoy No. 43HV is supplied as an atomized powder specially sized for application with high-velocity oxygen fuel (HVOF) systems. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance and surface qualities as well as heat treating and surface treatment. Filing Code: Ni-664. Producer or source: Wall Colmonoy Corporation.

scholarly journals SPH modeling of adhesion in fast dynamics: Application to the Cold Spray process

2016 ◽  
Vol 344 (4-5) ◽  
pp. 211-224 ◽  
Author(s):  
Paul Profizi ◽  
Alain Combescure ◽  
Kahuziro Ogawa
Keyword(s):  
Cold Spray ◽  
Cold Spray Process ◽  
Spray Process

Significant influence of carrier gas temperature during the cold spray process

2014 ◽  
Vol 30 (6) ◽  
pp. 443-450 ◽  
Author(s):  
S. Yin ◽  
X. Suo ◽  
H. Liao ◽  
Z. Guo ◽  
X. Wang
Keyword(s):  
Cold Spray ◽  
Significant Influence ◽  
Gas Temperature ◽  
Cold Spray Process ◽  
Carrier Gas ◽  
Spray Process

Difference oxidation behaviors of Ni8Al and Ni25Cr coatings in air with water vapor at 650∘

2021 ◽  
pp. 2150274
Author(s):  
Dingjun Li ◽  
Wenlang Huang ◽  
Xiaohu Yuan ◽  
Taihong Huang ◽  
Chao Li ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Velocity ◽  
Cyclic Oxidation ◽  
Oxidation Behaviour ◽  
Fuel Spray ◽  
High Velocity Oxygen Fuel ◽  
Service Environment ◽  
Generator Unit ◽  
Oxygen Fuel ◽  
Oxidation Behaviors

The oxidation behaviour of Ni8Al and Ni25Cr coatings produced by high velocity oxygen fuel spray (HVOF) which were deposited on Fe-based alloys (CB2) was investigated. We simulated the service environment of the steam generator unit, and put the samples in a thermostatic tube furnace at 650[Formula: see text] in air with 20 wt.% water vapor for 1000 hours of cyclic oxidation. The formation mechanism are explained using SEM, XRD, and EDX. There were no spallations and obvious cracks in both coatings. Ni25Cr coating generated a better protection oxides scale than that scale on Ni8Al. The behavior and mechanism of the oxide scale formation had an important influence in coatings and we have discussed these phenomenons in the study.

scholarly journals Deposition of Copper Fine Particle by Cold Spray Process

2009 ◽  
Vol 50 (6) ◽  
pp. 1482-1488 ◽  
Author(s):  
Masahiro Fukumoto ◽  
Hiroki Terada ◽  
Masahiro Mashiko ◽  
Kazunori Sato ◽  
Motohiro Yamada ◽  
...  
Keyword(s):  
Cold Spray ◽  
Fine Particle ◽  
Cold Spray Process ◽  
Spray Process
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