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.

Affection of Manufacture Parameters and Mixture Material on Plastic Alloy Bearings

2012 ◽  
Vol 164 ◽  
pp. 37-41
Author(s):  
Cheng Yun Yang ◽  
Jin Min Peng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Process Parameters ◽  
Peel Strength ◽  
Manufacture Process ◽  
Orthogonal Experiments ◽  
And Performance ◽  
Orthogonal Tests ◽  
Tearing Strength ◽  
Optimal Formula

Manufacture process parameters will be obtained from experiments in research. Molding technology determines the mechanical properties and performance of the product. The influence of molding temperature and time are significant on the performance of water lubricated bearing, the plastic alloy is based on latex material, synthesized with different fillings, accelerators and other matters, and displays great mechanical and friction properties. The main performance included peel strength, tensile strength and wearing capacity. Optimization of manufacture process parameters and the orthogonal experiments on them were carried out by integrating the results of experiments and finally the optimal manufacture process was achieved. In the experiment, three-leveled orthogonal tests were conducted for the three systems to test the tensile strength, tearing strength, stress at definite elongation, hardness and tensile rate. The impacts of the respective systems were analyzed and the content of each component are determined to get the optimal formula.

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.

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.

Droplet transfer behavior of narrow gap laser wire filling welding

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940045 ◽  
Author(s):  
Z. Zhang ◽  
R. Wang ◽  
G. Gou ◽  
H. Chen ◽  
W. Gao
Keyword(s):  
Welding Speed ◽  
High Speed ◽  
Transition Period ◽  
High Speed Photography ◽  
Narrow Gap ◽  
Droplet Transfer ◽  
Transfer Behavior ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Droplet Transition

In this paper, we study the droplet transition behavior of narrow gap laser wire filling welding under the condition of changing welding speed and wire feeding speed, and it was observed by high-speed photography. It was found that with the increase of welding speed, the frequency of droplet transfer was reduced and the transition period was prolonged. With the increase of wire feeding speed, the wire was not fully melted and finally inserted into the molten pool.

Simultaneous Measurements of Droplet Size, Temperature, and Velocity Using an Integrated Phase-Doppler/Rainbow Thermometer

2001 ◽  
Author(s):  
Matt O’ Donnell ◽  
Sumanta Acharya
Keyword(s):  
Refractive Index ◽  
Detailed Examination ◽  
Temperature Profiles ◽  
Droplet Temperature ◽  
Radial Temperature ◽  
Temperature Correlation ◽  
Simultaneous Measurements ◽  
Laser Diagnostic ◽  
The Mean ◽  
And Performance

Abstract This work summarizes efforts to determine the accuracy and performance characteristics of a new and novel laser diagnostic to measure instantaneous, in flight, droplet temperatures. The instrument uses the location of the rainbow peak to deduce the refractive index of the droplet, which in turn is related to the droplet temperature. Preliminary experiments were undertaken in order to understand the fundamental operating principles and limitations of the instrument. These experiments measured the temperature of an isothermal, single stream of monodisperse droplets. These measurements indicate that the mean refractive index can be measured with a standard deviation as low as 0.0001m. Once the operation of the refractometer was proved under isothermal conditions, the measurement of droplet temperatures in a swirl-stabilized combustor was performed. These measurements indicate that the strength of the rainbow signal is significantly hampered by the noise induced by the flame. Preliminary temperature measurements with the combustor equipped with 45° vanes showed relatively constant radial temperature profiles (∼55–60°C) at locations less than 2 inches from the nozzle exit. A detailed examination of the temperature correlation with velocity and diameter revealed that larger and faster moving droplets dominate the distributions. Thus, the smaller droplets that are suspected of having the highest temperatures are inadequately represented in the mean droplet temperature.

scholarly journals Flexible Wire-Shaped Perovskite Photodetector via Joule Heating for Improved Crystallization and Performance

2018 ◽  
Vol 5 (15) ◽  
pp. 1800082 ◽  
Author(s):  
Geoffrey Ryan Adams ◽  
Nirmal Adhikari ◽  
Helen Parker ◽  
Okenwa Okoli
Keyword(s):  
Joule Heating ◽  
Flexible Wire ◽  
And Performance

Effect of Process Parameters on the Quality of the Cladding Layer by the Inside-Laser Wire Feeding

Applied laser ◽  
2013 ◽  
Vol 33 (4) ◽  
pp. 381-384
Author(s):  
朱刚贤 Zhu Gangxian ◽  
石拓 Shi Tuo ◽  
傅戈雁 Fu Geyan ◽  
石世宏 Shi Shihong ◽  
李洪远 Li Hongyuan
Keyword(s):  
Process Parameters ◽  
Cladding Layer ◽  
Wire Feeding

Effect of Process Parameters on the Quality of the Cladding Layer by the Inside-Laser Wire Feeding

Applied laser ◽  
2013 ◽  
Vol 33 (4) ◽  
pp. 381-384
Author(s):  
朱刚贤 Zhu Gangxian ◽  
石拓 Shi Tuo ◽  
傅戈雁 Fu Geyan ◽  
石世宏 Shi Shihong ◽  
李洪远 Li Hongyuan
Keyword(s):  
Process Parameters ◽  
Cladding Layer ◽  
Wire Feeding

scholarly journals Influence of Current Feeding Position of Duplex Current Feeding MIG Welding on Droplet Heat Quantity

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3590
Author(s):  
Atsuhito Aoki ◽  
Shinichi Tashiro ◽  
Hideaki Kurokawa ◽  
Manabu Tanaka
Keyword(s):  
Welding Process ◽  
Welding Current ◽  
Mig Welding ◽  
Secondary Current ◽  
Pure Argon ◽  
Large Current ◽  
Heat Quantity ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Simplified Calculation

Pure argon metal inert gas (MIG) welding is expected to offer the possibility to obtain high toughness weld joints. However, due to its arc instability and low wettability, it is difficult to apply pure argon MIG to a practical welding structure. In order to solve these problems, an improved MIG welding process with a duplex current feeding (DCF-MIG) mechanism was developed. In the DCF-MIG process, the welding current and the wire feeding speed are independently controlled by an additionally feeding secondary current from a secondary power source. Thereby, DCF-MIG can supply a large current compared to conventional MIG under the same deposition rate. In this study, to consider the influence of the secondary current feeding position of DCF-MIG on droplet heat quantity, droplet heat quantity was measured by calorimetry. As a result, the droplet heat quantity was found to be increased significantly with the increase of the distance between the primary current feeding point and secondary current feeding point. The increase of the droplet heat quantity in the DCF-MIG process had a strong effect on improving bead shape and penetration. The droplet heat quantity with the effective current value of DCF-MIG was derived from the simplified calculation and the results roughly agreed with the experimental data.

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