Process parameters analysis of high power direct diode laser cladding

2010 ◽  
Author(s):  
Soundarapandian Santhanakrishnan ◽  
Fanrong Kong ◽  
Radovan Kovacevic
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
Process Parameters ◽  
High Power ◽  
Parameters Analysis

High power diode laser cladding of hard Fe-based coatings

2012 ◽  
Author(s):  
LI Zhuguo ◽  
YAO Chengwu ◽  
ZHU Yanyan ◽  
HUANG Jian ◽  
WU Yixiong
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Power Diode ◽  
High Power Diode Laser

High power diode laser cladding

2003 ◽  
Vol 138 (1-3) ◽  
pp. 411-416 ◽  
Author(s):  
S Barnes ◽  
N Timms ◽  
B Bryden ◽  
I Pashby
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Power Diode ◽  
High Power Diode Laser

An experimentally based thermo-kinetic hardening model for high power direct diode laser cladding

2011 ◽  
Vol 211 (7) ◽  
pp. 1247-1259 ◽  
Author(s):  
Soundarapandian Santhanakrishnan ◽  
Fanrong Kong ◽  
Radovan Kovacevic
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Hardening Model

High Power Diode Laser Cladding of Wear Resistant Metal Matrix Composite Coatings

2013 ◽  
Vol 199 ◽  
pp. 587-592 ◽  
Author(s):  
Damian Michał Janicki
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Heat Input ◽  
Laser Power ◽  
Composite Coatings ◽  
Power Level ◽  
Erosive Wear ◽  
Homogeneous Distribution ◽  
Wear Properties

The paper describes the application of high power direct diode laser (HPDDL), with a rectangular laser beam spot of size 1.8x6.8 mm, for the cladding of Ni-based alloy (NiSiB)+WC composite coatings. The laser cladding process was carried out with a direct injection of cladding powder into the melt pool. The influence of parameters, such as laser power beam (heat input) and WC particles size in the cladding powder on the coatings microstructure and wear properties was investigated. The microstructure and morphology of the coatings were assessed by optical and scanning electron microscopy. Wear properties of the coatings were investigated using abrasive and erosive wear tests. The results showed that a proper selection of laser cladding parameters provides non-porous coatings with excellent metallurgical bonding and a homogeneous distribution of WC particles. The dissolution of WC particles increases with the size of WC particles decreasing in the cladding powder and increasing the laser power level (heat input). The coatings containing WC particles in size range of 100-200 µm provide the highestwear resistance under erosive and abrasiveconditions.

Optical monitoring of high power direct diode laser cladding

2014 ◽  
Vol 64 ◽  
pp. 363-376 ◽  
Author(s):  
Shuang Liu ◽  
Parisa Farahmand ◽  
Radovan Kovacevic
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Optical Monitoring

Modeling of the Off-Axis High Power Diode Laser Cladding Process

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
Shaoyi Wen ◽  
Yung C. Shin
Keyword(s):  
Diode Laser ◽  
Laser Cladding ◽  
High Power ◽  
Molten Pool ◽  
Flow Behavior ◽  
Powder Flow ◽  
Powder Injection ◽  
Rectangular Beam ◽  
Power Diode ◽  
High Power Diode Laser

Off-axis high power diode laser (HPDL) cladding is commonly used for surface quality enhancement such as coating, part repairing, etc. Although some laser cladding models are available in literature, little has been reported on the modeling of powder flow and molten pool for a rectangular beam with side powder injection. In this article, a custom-designed flat nozzle delivers the powder material into a distinct molten pool formed by a HPDL with a rectangular beam. A powder model is first presented to reveal the powder flow behavior below the flat nozzle. Key parameters such as nozzle inclination angle, rectangular beam profile, shielding gas flow rates, and powder feed rate are incorporated so that spatial powder density, powder velocity, and temperature distribution are distinctly investigated. Then in order to describe thermal and fluidic behaviors around the molten pool formed by the rectangular beam, a three-dimensional self-consistent cladding model is developed with the incorporation of the distributed powder properties as input. The level set method is adopted to track the complex free surface evolution. Temperature fields and fluid motion in the molten pool area resulting from the profile of rectangular beam are distinctly revealed. The effect of continuous mass addition is also embedded into the governing equations, making the model more accurate. A HPDL cladding with little dilution is formed and the simulated results agree well with the experiment.

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