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research-article

Investigation of the Transient Characteristics for Laser Cladding Beads using 420 Stainless Steel Powder

[+] Author and Article Information
S. M. Saqib

University of Windsor, Department of Industrial and Manufacturing Systems Engineering 401 Sunset Ave, Windsor, ON, Canada N9B 3P4
saqibs@uwindsor.ca

R. J. Urbanic

ASME Membership University of Windsor, Department of Mechanical, Automotive, and Materials Engineering 401 Sunset Ave, Windsor, ON, Canada N9B 3P4
jurbanic@uwindsor.ca

1Corresponding author.

ASME doi:10.1115/1.4036488 History: Received March 16, 2016; Revised March 17, 2017

Abstract

To understand the different aspects of the laser cladding (LC) process, process models can be of aid. Presently, the correct parameters settings for different manufacturing processes, such as machining, casting, etc. are based on simulation tools that can evaluate the influence of the process parameters for different conditions. However, there are no comprehensive, focused simulation process planning tools available for the LC process. In the past, most of the research has focused on the experimentally based optimization strategies for a process configuration, typically for a single track bead in steady state conditions. However, an understanding of realistic transient conditions needs to be explored for effective process planning simulation tools and build strategies to be developed. A set of cladding experiments have been performed for single and multiple bead scenarios, and the effects of the transient conditions on the bead geometry for these scenarios have been investigated. It is found that the lead-in and lead-out conditions differ, corner geometry influences the bead height, and when changing the input power levels, the geometry values oscillate differently than the input pulses. Changes in the bead geometry are inherent when depositing material; consequently real time adjustments for the process setting are essential. The dynamic, time varying heating and solidification, for multiple layer scenarios, leads to challenging process planning and real time control strategies.

Copyright (c) 2017 by ASME
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