Study on the Effects of Process Parameters on Weld Joint using Coaxial Inside-Beam Wire Feeding

2011 ◽  
Vol 287-290 ◽  
pp. 2279-2282
Author(s):  
Chen Wang ◽  
Shi Hong Shi ◽  
Ai Qin Xu ◽  
Xue Lei Han ◽  
Hong Yuan Li ◽  
...  
Keyword(s):  
Process Parameters ◽  
Weld Joint ◽  
Laser Power ◽  
Metal Plate ◽  
Welding Seam ◽  
Scanning Velocity ◽  
Feeding Process ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Joint Quality

The effects of process parameters such as laser power, scanning velocity and wire feeding speed on weld joint quality has been discussed through some laser welding experiments using coaxial inside-beam wire feeding process method. The results reveal that: Along with the increase of the laser power, weld width and depth are increasing gradually; Coating surface will appear burning loss and deboss when laser power is too large. The increase of scanning velocity decreases the depth and width of molten bath, and abates laser hole-effect, so the metal plate can not be welded penetration. Larger wire feeding speed can avoid welding seam produce burning loss, but it also can strengthen welding wire reflect the laser, and decline the welding.

The mechanism of process parameters influencing the AlSi10Mg side surface quality fabricated via laser powder bed fusion

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shimin Dai ◽  
Hailong Liao ◽  
Haihong Zhu ◽  
Xiaoyan Zeng
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Process Parameters ◽  
Laser Power ◽  
Side Surface ◽  
Laser Powder Bed Fusion ◽  
Scanning Velocity ◽  
Content Type ◽  
Powder Bed

Purpose For the laser powder bed fusion (L-PBF) technology, the side surface quality is essentially important for industrial applicated parts, such as the inner flow parts. Contour is generally adopted at the parts’ outline to enhance the side surface quality. However, the side surface roughness (Ra) is still larger than 10 microns even with contour in previous studies. The purpose of this paper is to study the influence of contour process parameters, laser power and scanning velocity on the side surface quality of the AlSi10Mg sample. Design/methodology/approach Using L-PBF technology to manufacture AlSi10Mg samples under different contour process parameters, use a laser confocal microscope to capture the surface information of the samples, and obtain the surface roughness Ra and the maximum surface height Rz of each sample after analysis and processing. Findings The results show that the side surface roughness decreases with the increase of the laser power at the fixed scanning velocity of 1,000 mm/s, the side surface roughness Ra stays within the error range as the contour velocity increases. It is found that the Ra increases with the scanning velocity increasing and the greater the laser power with the greater Ra increases when the laser power of contour process parameters is 300 W, 350 W and 400 W. The Rz maintain growth with the contour scanning velocity increasing at constant laser power. The continuous uniform contour covers the pores in the molten pool of the sample edge and thus increase the density of the sample. Two mechanisms named “Active adhesion” and “Passive adhesion” cause sticky powder. Originality/value Formation of a uniform and even contour track is key to obtain the good side surface quality. The side surface quality is determined by the uniformity and stability of the contour track when the layer thickness is fixed. These research results can provide helpful guidance to improve the surface quality of L-PBF manufactured parts.

Study on the Process Parameters of MPAW-Based Rapid Prototyping

2007 ◽  
Vol 353-358 ◽  
pp. 1931-1934
Author(s):  
Wurikaixi Aiyiti ◽  
Wan Hua Zhao ◽  
Yi Ping Tang ◽  
Bing Heng Lu
Keyword(s):  
Rapid Prototyping ◽  
Process Parameters ◽  
Gas Flow ◽  
Scanning Speed ◽  
Part Quality ◽  
R Ratio ◽  
Feeding Speed ◽  
Wire Feeding ◽  
The Impact

A direct metal RP (rapid prototyping) process based on micro-plasma arc welding (MPAW) is presented. The impact of R (ratio of width to height of the deposited track’s cross-section) on part quality is investigated. Taguchi method is adopted to analyze the effect of each process parameter on R, and the optimized process parameters are obtained. The results show that the quality of the parts with larger R is better than that with smaller R, and the peak current, duty cycle of pulse duration, wire-feeding speed, scanning speed and plasma gas flow rate all exert significant effects on R. The overlapped surface smoothness, tensile strength and elongation of the parts fabricated with optimized parameters are measured to show obviously better performances than those of the parts fabricated with ordinary process parameters.

Impacts of Process Parameters on the Substrate Distortion of PAW-Based Rapid Prototyping

2011 ◽  
Vol 462-463 ◽  
pp. 1002-1007
Author(s):  
Wurikaixi Aiyiti ◽  
Mamtimin Gheni ◽  
Xieeryazidan Adayi
Keyword(s):  
Process Parameters ◽  
Arc Welding ◽  
Pulse Current ◽  
Low Cost ◽  
Plasma Arc Welding ◽  
Important Process ◽  
Element Analysis ◽  
Rp Process ◽  
Feeding Speed ◽  
Wire Feeding

A low-cost direct metal RP process based on the plasma arc welding (PAW) is presented. The impacts of two important process parameters (pulse current and wire-feeding speed) on the distortion of the substrate are investigated. The temperature field and the distortion of the depositing process are simulated by finite element analysis. The results show that the heat input and the quantity of the metal fed into the molten pool influence the distortion of the substrate. Higher pulse current and wire-feeding speed will bring on larger distortion.

scholarly journals Morphology and Performance Characterizations of 316 Stainless Steel Additively Fabricated by Laser Thermal-Joule Heating Composite Process

2021 ◽  
Author(s):  
Suli Li ◽  
Kaijue Ma ◽  
Xu Chao ◽  
Yang Gao ◽  
Laixia Yang ◽  
...  
Keyword(s):  
Process Parameters ◽  
Joule Heating ◽  
Bottom Layer ◽  
Temperature Profiles ◽  
Feeding Speed ◽  
Wire Feeding ◽  
And Performance ◽  
Geometric Morphology ◽  
Fabrication Parameters ◽  
Orthogonal Tests

The Laser Thermal-Joule Heating Composite Process was studied by orthogonal tests based on an analysis of fabrication parameters such as the laser power, wire feeding speed, and electric current. Temperature profiles and the geometric morphology of deposited layers under different process parameters were analyzed, and the overlaps between the layers and the substrate were observed. Results show that when the temperature at the bottom layer of the additive manufacturing is higher than the melting point of the substrate, and the highest temperature at the top layer does not exceed the over-firing temperature, good morphology and close bonding with the substrate can be obtained. Finally, appropriate process parameters were identified and verified to print multiple layers continuously.

Experimental Study Based on the Widening Melting Roads Cladding Forming of the Hollow Laser

2013 ◽  
Vol 419 ◽  
pp. 180-185
Author(s):  
Liang Liang Yu ◽  
Shi Hong Shi ◽  
Ge Yan Fu ◽  
Mei Ling Tian
Keyword(s):  
Experimental Study ◽  
Process Parameters ◽  
Research Group ◽  
Laser Power ◽  
New Technology ◽  
Scanning Speed ◽  
Feeding Speed ◽  
Series Of Experiments ◽  
Cladding Layers ◽  
Powder Feeding

Our research group has invented a kind of new technology called coaxial inside-beam powder feeding. By series of experiments, this paper analyzed and summarized the process parameters’ influence on the cladding layers’ feature and quanlity, which contain the laser power P, the powder feeding speed Vf, the scanning speed Vs and the defocusing distance L. Some cladding experiments also were made to aquire the cladding roads with variable width. The experimental results indicate that when P, Vf and D×Vs are fixed, roads with stable height and uniformly changing width are acquired by changing Vs and L at the same time.

Optimization of Laser Transmission Joining Process between Different Thermoplastics using Response Surface Methodology

2011 ◽  
Vol 291-294 ◽  
pp. 1433-1439 ◽  
Author(s):  
Zhen Kai Xu ◽  
Kai Wang ◽  
Min Feng Jiang ◽  
Yang Hu ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Process Parameters ◽  
Laser Power ◽  
Scanning Speed ◽  
Optical Microscope ◽  
Main Process ◽  
Pet Film ◽  
Joint Quality ◽  
Clamping Pressure

In order to determine the optimum joint conditions, four key process parameters affecting the joint quality of laser transmission joint of 1mm thick PET film and PC film，namely，laser power, scanning speed, clamping pressure and scanning number are optimized by response surface methodology in this paper. The interaction effect of main process parameters on joint quality is researched. The samples are tested using a multi-axis microtester in order to determine joint strength. The morphology of the joining area is observed with an optical microscope. Design Expert analysis indicates that the best laser power, scanning speed, clamping pressure and scanning number on joint quality were 35.7W, 5.0mm/s, 0.75MPa, 3, respectively. Finally, the experimental results are consistent with the predicted, which illustrates that the developed mathematical models can predict the responses adequately.

scholarly journals Laser-CMT Hybrid Welding-Brazing of Al/Steel Butt Joint: Weld Formation, Intermetallic Compounds, and Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3651 ◽  
Author(s):  
Yuxin Chen ◽  
Zhibin Yang ◽  
Chunyuan Shi ◽  
Zhibin Xin ◽  
Zitong Zeng
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Intermetallic Compounds ◽  
Welding Speed ◽  
Laser Power ◽  
Hybrid Welding ◽  
Imcs Layer ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Interface Layers

6A01-T5 aluminum alloy and SUS301L-DLT austenitic stainless steel sheets were welded by a laser-cold metal transfer (CMT) hybrid welding-brazing method with ER5183 filler wire. We researched the weld forming, intermetallic compounds, and mechanical character, which are influenced by laser power, wire feeding speed, and welding speed. Well-formed joints with uniformly distributed interface layers were obtained under certain parameters. The spreading and wetting distance on the steel upper surface increased initially and then decreased as the laser power increased, and increased progressively as the wire feeding speed increased or welding speed decreased. There were both Fe2Al5 and Fe4Al13 in the interfacial intermetallic compounds (IMCs) layer. The thickness was controlled to within 2.0–6.9 µm. The thickness of the IMCs layer increased as the heat input increased; however, the increasing rate decreased gradually. The tensile strength of the joints was not only completely dependent on the thickness of the IMCs, but also on the spreading and wetting distance on the steel surface. The highest tensile strength could reach up to 188.7 MPa, which is about 77.1% of that of the base aluminum alloy. The tensile sample fracture occurred at the IMCs layer, and regional metallurgical bonding happened in the interface layer.

The Influence of Ring Inside-Laser Coaxial Powder Feeding Process Parameter on Forming

2012 ◽  
Vol 529 ◽  
pp. 120-124 ◽  
Author(s):  
Ying Yin Zhang ◽  
Shi Hong Shi ◽  
Ge Yan Fu ◽  
Ping Zhu ◽  
Wei Cai
Keyword(s):  
Laser Power ◽  
Ring Laser ◽  
Feeding Rate ◽  
Single Channel ◽  
Influence Of Process Parameters ◽  
Scanning Velocity ◽  
Layer Height ◽  
Cladding Layer ◽  
Feeding Process ◽  
Powder Feeding

This experiment uses the shower nozzle of the ring laser inside-laser coaxial powder feeding for single channel /layer, defocusing, and multi-channel lap cladding. This study investigates the influence of process parameters (such as the laser power) on forming size and surface morphology. In certain limits, the cladding layer height and width are in positive correlation with laser power and powder feeding rate, and in negative correlation with scanning velocity. When the lap coefficient is 50%, the forming quality is high.

Modeling and Optimization of Laser Direct Joining Process Parameters of Titanium Alloy and Carbon Fiber Reinforced Nylon Based on Response Surface Methodology

2014 ◽  
Vol 620 ◽  
pp. 3-9 ◽  
Author(s):  
Ye Cai ◽  
Chuang Huang ◽  
Hui Xia Liu ◽  
Dong Dong Meng ◽  
Yan Wei Wu ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Response Surface Methodology ◽  
Titanium Alloy ◽  
Process Parameters ◽  
Laser Power ◽  
Scan Speed ◽  
Predicted Values ◽  
Joint Quality ◽  
The Mathematical Model ◽  
Joining Process

A laser direct joining (LDJ) experiment of titanium alloy (Ti-6Al-4V) and carbon fiber reinforced nylon (PA66CF20) is presented here using diode laser equipment. Experimental design and experiment of LDJ are carried out according to a single process parameters range obtained from the previous experiment. Response surface methodology (RSM) in Design-Expert v7 software is adopted to establish the mathematical model between LDJ process parameters and joint quality. Then the interaction effects of joining process parameters (laser power, scan speed and stand-off distance) on joint quality are investigated using analysis-of-variance (ANOVA), and the result shows that the interaction effect of laser power and scan speed on joint quality is the greatest. Finally, the predicted values from the mathematical model established by RSM are compared with the experimental values, and the process parameters are optimized to obtain the strongest joint strength. The result suggests that the predicted values are in good agreement with the experimental ones. The purpose of predicting and optimizing joint quality based on reasonable process parameters is achieved.

Influence of Process Parameters on Temperature Field in Laser Remelting Coating Prepared by Plasma Spraying on Titanium Alloy Surface

2012 ◽  
Vol 197 ◽  
pp. 802-807
Author(s):  
Hua Feng Guo ◽  
Tao Sun ◽  
Zhi Li ◽  
Ju Li Li
Keyword(s):  
Titanium Alloy ◽  
Temperature Field ◽  
Plasma Spraying ◽  
Process Parameters ◽  
Laser Power ◽  
Alloy Surface ◽  
Laser Remelting ◽  
Influence Of Process Parameters ◽  
Scanning Velocity ◽  
Spot Diameter

In order to research the effect of process parameters on temperature field evolution in laser remelting coating prepared by plasma spraying on titanium alloy surface，the finite element model of laser multi-tracks remelting temperature field was established based on ANSYS, and remelting temperature field was analyzed. The analysis results show that: under certain scanning velocity and laser spot diameter, too small laser power can't achieve metallurgical combination between coating and substrate; the effect on temperature field of scanning velocity was smaller than laser power; the influence on molten pool center temperature and remelting width of spot diameter is bigger; preheating coating and substrate can be effectively balance remelting process temperature field, thereby reducing the thermal stress and coating cracks appear chance.Through the calculation model can master the evolution of the temperature of lasre remelting process and can provide the theory basis for process parameter selection and optimization.

Sign in / Sign up

Export Citation Format

Share Document