The Effect of Thermal Field on the Deposition of Fe-TiC on Carbon Steel Using Laser Cladding

2010 ◽  
Author(s):  
Masoud Alimardani ◽  
Ali Emamian ◽  
Amir Khajepour ◽  
Stephen F. Corbin
Keyword(s):  
Carbon Steel ◽  
Numerical Model ◽  
Laser Cladding ◽  
Thermal Field ◽  
Deposition Process ◽  
Time Dependent ◽  
Experimental Investigations ◽  
Thermal Fields ◽  
Temperature Distributions ◽  
Laser Cladding Process

In this paper, a numerical and experimental method is used to investigate the effect of thermal fields on the deposition of Fe-TiC using the laser cladding process. Since in laser cladding temperature distributions and consequent rapid cooling rates determine the microstructure and final physical properties of the deposited layers, a 3D time-dependent numerical model is used to simulate the cladding process parallel to experimental analysis. The numerical results are used to study the temperature distributions and their evolutions throughout the deposition process. The experimental and verified numerical outcomes are then employed to study the variations of the microstructures of the deposited material as well as correlation between the formed microstructures and temperature distributions across the deposition domain. The numerical and experimental investigations are conducted through the deposition of Fe-TiC on the substrate of AISI 1030 carbon steel using a 1.1 kW fiber laser. The experimental results confirm that by increasing the substrate temperature throughout the process the distribution of the TiC particles changes along with the deposited tracks and the TiC particles start forming clusters at the top of the clad.

Simulation and experimental investigations on the effect of Marangoni convection on thermal field during laser cladding process

Optik ◽  
2020 ◽  
Vol 203 ◽  
pp. 164044 ◽  
Author(s):  
Yichao Jiang ◽  
Yanhai Cheng ◽  
Xiancheng Zhang ◽  
Jinyong Yang ◽  
Xinyi Yang ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Thermal Field ◽  
Marangoni Convection ◽  
Experimental Investigations ◽  
Laser Cladding Process

Measurement of temperature distributions during laser cladding process

2000 ◽  
Vol 12 (3) ◽  
pp. 126-130 ◽  
Author(s):  
Y. P. Hu ◽  
C. W. Chen ◽  
K. Mukherjee
Keyword(s):  
Laser Cladding ◽  
Temperature Distributions ◽  
Laser Cladding Process

Experimental Study of the Convective Cooling of a Heated Continuously Moving Material

1994 ◽  
Vol 116 (1) ◽  
pp. 199-208 ◽  
Author(s):  
B. H. Kang ◽  
J. Yoo ◽  
Y. Jaluria
Keyword(s):  
Thermal Boundary Layer ◽  
Thermal Field ◽  
Manufacturing Processes ◽  
Heated Plate ◽  
Temperature Profiles ◽  
Transport Mechanisms ◽  
Design And Optimization ◽  
Thermal Buoyancy ◽  
Thermal Fields ◽  
Temperature Distributions

An experimental investigation of the heat transfer associated with a continuously moving material has been carried out. This thermal transport circumstance is encountered in many manufacturing processes, such as hot rolling, fiber drawing, plastic extrusion, crystal growing, and continuous casting. The transport associated with a heated plate or a cylindrical rod being cooled due to its own movement at uniform velocity in a stationary extensive fluid is considered. Very little experimental work has been done on this problem and this study focuses on the resulting thermal fields. Time-dependent temperature distributions in the solid, as well as in the flow, are measured for the material moving vertically downward in water and moving vertically upward or downward in air. The effects of thermal buoyancy, material speed, and properties of the material and the fluid on the thermal field are studied. The results indicate that the temperature profiles obtained are similar to those obtained in earlier numerical and analytical studies. At low material speeds, the upstream penetration of the conductive transport due to temperature variation in the material was seen to be substantial. This effect decreased with an increase in the material speed. The thermal boundary layer is found to be thicker in air than in water, as expected. The effect of thermal buoyancy on the temperature distributions in air was found to be very significant. High-thermal-conductivity materials, such as aluminum, are cooled down more rapidly than low-conductivity materials, such as teflon. The experimental results obtained lead to a better understanding of the underlying transport mechanisms and add to the data base needed for the design and optimization of the relevant systems.

On a Numerical Model of Laser Cladding Process

2010 ◽  
Author(s):  
J. Esmaeelpanah ◽  
M. Passandideh-Fard
Keyword(s):  
Numerical Model ◽  
Phase Change ◽  
Laser Cladding ◽  
Stokes Equations ◽  
Volume Fraction ◽  
Particle Temperature ◽  
Solid Volume Fraction ◽  
Titanium Substrate ◽  
Powder Injection ◽  
Laser Cladding Process

In this paper, a 2D transient numerical model for the simulation of a laser cladding process with a coaxial powder injection is developed. The model is based on the enthalpy method integrated into a liquid/solid volume fraction approach which can simulate the phase change phenomenon. The physical governing equations solved in the model are: the Navier-Stokes equations for fluid flow, and the energy equation including phase change for heat transfer within the powder, clad and substrate. A Volume-of-Fluid (VOF) algorithm is used to obtain the solution of the free surface. The model is capable of predicting the clad height, dilution depth and final shape of the clad. The simulations were performed for titanium particles on a titanium substrate. The simulations show that the clad height is decreased with the laser power, the scan speed, and the substrate and particle temperature.

scholarly journals Research On Energy Distribution and Solidification Characteristics During Laser Cladding Based On Numerical Simulation

2021 ◽  
Author(s):  
Wenhui Yang ◽  
Yanhai Cheng ◽  
Yipeng Zhang ◽  
Jinyong Yang ◽  
Xiubing Liang
Keyword(s):  
Surface Modification ◽  
Numerical Model ◽  
Energy Distribution ◽  
Laser Cladding ◽  
Laser Energy ◽  
Solidification Rate ◽  
Melt Pool ◽  
Laser Cladding Process ◽  
Calculation Results ◽  
Effects Of Temperature

Abstract Laser cladding as an emerging surface modification technology can be widely adopted for surface modification. In this study, 27SiMn was selected as the substrate, the powder was a self-made iron-based alloy, and the thermophysical properties of the material were predicted by the CALPHAD algorithm. The numerical model of the laser cladding process is established by setting reasonable hypothetical condition, initial condition, boundary condition, and solver parameters. In order to verify the accuracy of the numerical model, 10 sets of experiments have been carried out, and the agreement between the model calculation results and the experimental results reached 92%. Through the study of energy distribution in the laser cladding process, it is found that about 10% of the laser energy is used to heat the substrate to form a melt-pool, and at least 53% of the energy is radiated into the environment. Finally, the effects of temperature gradient and solidification rate on the microstructure of the cladding layer were explored.

Investigation on the Process Characteristics of Laser Cladding Fabrication Using 45 Carbon Steel Wire

2012 ◽  
Vol 499 ◽  
pp. 147-151
Author(s):  
Jin Sun ◽  
Singare Sekou
Keyword(s):  
Carbon Steel ◽  
Laser Cladding ◽  
Nd:Yag Laser ◽  
Laser Scanning ◽  
Steel Wire ◽  
Scanning Speed ◽  
Deposition Process ◽  
Process Characteristics ◽  
Wire Feeding ◽  
Metal Microstructure

This study investigates the effect of wire feeding direction, angle, wire feeding speed, laser scanning speed and laser power in a high power Nd:YAG laser direct metal deposition process for single and multilayered clad/parts. The lap cladding experiment using 500 W Nd:YAG laser is designed to study the best lap rate of 45 carbon steel. The microstructure and micro hardness of the melting track shows that dense metal microstructure can be obtained using laser cladding.

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