Surface Alloying of Iron Alloys by Laser Beam Melting

1981 ◽  
Vol 8 ◽  
Author(s):  
Barry L. Mordike ◽  
Hans W. Bergmann
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
Epitaxial Growth ◽  
High Power ◽  
Iron Alloys ◽  
Surface Heat ◽  
Laser Hardening ◽  
Surface Alloying ◽  
High Power Lasers ◽  
Laser Beam Melting

ABSTRACTThe surface heat treatment of iron alloys using high power lasers is reported. The essential features e.g. epitaxial growth, homogeneity etc. are discussed. The results are tabulated for the technically important alloys. The possibilities of laser hardening are demonstrated by four examples.

scholarly journals Development of Large Surface Heat Treatment Method for Carbon Steel with High Power CO2 Laser (2nd Report)

1997 ◽  
Vol 63 (9) ◽  
pp. 1320-1324 ◽  
Author(s):  
Hiroyuki Yamamoto ◽  
Masashi Oikawa ◽  
Katsuhiro Minamida ◽  
Hiromichi Kawasumi
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Co2 Laser ◽  
High Power ◽  
Treatment Method ◽  
Surface Heat ◽  
Heat Treatment Method

High power laser beam melting of Ti6Al4V on formed sheet metal to achieve hybrid structures

2015 ◽  
Author(s):  
Bhrigu Ahuja ◽  
Adam Schaub ◽  
Michael Karg ◽  
Roman Schmidt ◽  
Marion Merklein ◽  
...  
Keyword(s):  
Laser Beam ◽  
Sheet Metal ◽  
High Power ◽  
Hybrid Structures ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Beam Melting

scholarly journals High-power laser beam shaping using apodized apertures

1990 ◽  
Vol 8 (1-2) ◽  
pp. 349-360 ◽  
Author(s):  
S. G. Lukishova ◽  
P. P. Pashinin ◽  
S. Kh. Batygov ◽  
V. A. Arkhangelskaya ◽  
A. E. Poletimov ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Fresnel Diffraction ◽  
Beam Shaping ◽  
High Power Laser ◽  
Laser Beam Shaping ◽  
Power Laser ◽  
High Power Lasers ◽  
Uv Visible

This paper gives the results of the investigations of four types of apodized (soft) apertures for beam shaping of UV, visible and IR high-power lasers with near-Gaussian and flat-top transmittance. The apodized apertures (AA) are ≈3–45 mm in diameter, but the principles of fabrication of such apertures lends the possibility of apodizing beams with diameter <1 mm and >200 mm. The examples of studies of the AA in high-power lasers are presented. The possibility of avoiding the Fresnel diffraction ripples is proved experimentally.

scholarly journals Heat Treatment and Formation of Magnetocaloric 1:13 Phase in LaFe11.4Si1.2Co0.4 Processed by Laser Beam Melting

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 773 ◽  
Author(s):  
Jwalant Kagathara ◽  
Sandra Wieland ◽  
Eric Gärtner ◽  
Volker Uhlenwinkel ◽  
Matthias Steinbacher
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
Entropy Change ◽  
Experimental Investigations ◽  
Cast Material ◽  
Cooling Systems ◽  
Laser Beam Melting ◽  
Conventional Heat Treatment ◽  
Magnetocaloric Properties ◽  
Short Time

In recent years, magnetocaloric materials have been extensively studied as materials for use in alternative cooling systems. Shaping the magnetocaloric material to thin-walled heat exchanger structures is an important step to achieve efficient magnetocaloric cooling systems. In the present work, experimental investigations were carried out on the heat treatment of LaFe11.4Si1.2Co0.4 alloy processed by Laser Beam Melting (LBM) technology. Due to the rapid solidification after melting, LBM results in a refined micro structure, which requires much shorter heat treatment to achieve a high percentage of magnetocaloric 1:13 phase compared to conventional cast material. The influence of the heat treatment parameters (temperature, time, and cooling rate) on the resulting microstructure has been extensively studied. In addition to the conventional heat treatment process, induction technology was investigated and the results were very promising in terms of achieving good magnetocaloric properties after short-time annealing. After only 15 min holding time at 1373 K, the magnetic entropy change (∆S) of -7.9 J/kg/K (0–2 T) was achieved.

Laser beam melting and heat-treatment of 1.2343 (AISI H11) tool steel – microstructure and mechanical properties

2019 ◽  
Vol 742 ◽  
pp. 109-115 ◽  
Author(s):  
Florian Huber ◽  
Corinna Bischof ◽  
Oliver Hentschel ◽  
Johannes Heberle ◽  
Julian Zettl ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Laser Beam ◽  
Tool Steel ◽  
Steel Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Laser Beam Melting

scholarly journals Experimental Study on Effect of Laser Hardening Parameters on Carbon Steel, Non-Malleable Cast iron and X20Cr13 Materials

2018 ◽  
pp. 211-218
Author(s):  
K. Prashanthi ◽  
B. Ramakrishna
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Carbon Steel ◽  
Surface Hardening ◽  
Treatment Process ◽  
Surface Heat ◽  
Laser Surface ◽  
Laser Hardening ◽  
Heat Treatment Process ◽  
Malleable Cast

Laser hardening is a surface heat treatment process used to enhance tribological and mechanical properties of metals which also leads to increase in service life of the components. Material removal, wear and tear, load concentration occurs mostly at rotating and reciprocating parts. Hence it is sufficient to enhance the hardness of a component at functional areas rather than the entire component. Laser hardening process is designed to change the microstructure of metals through controlled heating and cooling to get a modified surface. The constraints of traditional surface heat treatment process such as inability to treat specific area, distortion, poor degree of controllability, requirement of a quenching medium, long cycle time can be overcome by using Laser surface heat treatment and in addition to that it can be automated. With its benefits Laser surface hardening turns out to be a cost effective and energy saving process. The presented work is an investigation of the laser surface hardening via experimental results making use of a 6 axis robotic arm and a 10KW high power diode laser system as heat source with a wavelength of 980nm on leading automotive parts such as retainer, hub, and turbine blade whose materials being non-malleable cast iron, carbon steel, X20Cr13 respectively. Process parameters such as laser power from power source, scan speed were varied to understand the influence on resulting heat treated surface and efforts were made to optimize the process parameters to attain maximum hardness for the component to enhance its working life.

Application of high-power lasers to study matter at ultrahigh pressures

1984 ◽  
Vol 142 (3) ◽  
pp. 395 ◽  
Author(s):  
S.I. Anisimov ◽  
A.M. Prokhorov ◽  
Vladimir E. Fortov
Keyword(s):  
High Power ◽  
High Power Lasers

Cutting of steels by high-power CO laser beam

1988 ◽  
Author(s):  
Shunich Sato ◽  
Kunimitsu Takahashi ◽  
Hideaki Saito ◽  
Masato Sugimoto ◽  
Tomoo Fujioka ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Co Laser
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