The Lincoln Electrical Company

Upper Saint Clair, OH, United States

The Lincoln Electrical Company

Upper Saint Clair, OH, United States
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Kottman M.,The Lincoln Electrical Company | Zhang S.,The Lincoln Electrical Company | McGuffin-Cawley J.,Case Western Reserve University | Denney P.,The Lincoln Electrical Company | Narayanan B.K.,The Lincoln Electrical Company
JOM | Year: 2015

The laser hot wire process has gained considerable interest for additive manufacturing applications, leveraging its high deposition rate, low dilution, thermal stability, and general metallurgical control including the ability to introduce and preserve desired meta-stable phases. Recent advancements in closed-loop process control and laser technology have increased productivity, process stability, and control of deposit metallurgy. The laser hot wire process has shown success in several applications: repairing and rejuvenating casting dies, depositing a variety of alloys including abrasion wear-resistant overlays with solid and tubular wires, and producing low-dilution (<5%) nickel alloy overlays for corrosion applications. The feasibility of fabricating titanium buildups is being assessed for aerospace applications. © 2015, The Minerals, Metals & Materials Society.


Trademark
Lincoln Global Inc. and The Lincoln Electrical Company | Date: 2010-11-23

electric arc welding equipment, namely, welders, and welding accessories, namely, welding tips and nozzles.


Trademark
THE LINCOLN Electrical COMPANY and Lincoln Global Inc. | Date: 2011-05-03

Energy-saving inverters.


Trademark
Lincoln Global Inc. and The Lincoln Electrical Company | Date: 2010-07-13

electric arc welding equipment, namely, wire feeders, and welding accessories, namely, feed heads, drive rolls and controllers.


Narayanan B.K.,The Lincoln Electrical Company | Kovarik L.,Ohio State University | Sarosi P.M.,General Motors | Quintana M.A.,The Lincoln Electrical Company | Mills M.J.,Ohio State University
Acta Materialia | Year: 2010

Ferritic weld metal deposited with a self-shielded arc-welding process has intentional additions of aluminum, magnesium, titanium and zirconium. This results in a complex precipitation process that has been characterized with a combination of electron microscopy techniques. This work indicates that the formation of a spinel oxide is critical for the nucleation of nitrides of zirconium and titanium and prevents the agglomeration of aluminum rich oxides and the formation of large aluminum nitrides. High-resolution transmission electron microscopy has been used to characterize the core/shell structure of the precipitates with microalloying additions. Thermodynamic modeling of the precipitate formation during solidification is consistent with the microstructural observations. The evolution of precipitate formation is critical to limit large inclusions and improve weld metal toughness. © 2009 Acta Materialia Inc.


Zhang S.,The Lincoln Electrical Company | Melfi T.,The Lincoln Electrical Company | Narayanan B.K.,The Lincoln Electrical Company
Science and Technology of Welding and Joining | Year: 2016

Modified 9Cr–1Mo, or P91, is a creep resistance steel grade for high temperature applications. Creep strength and ambient temperature impact toughness are required for welded joints, the latter of which is often a challenge especially for high deposition process such as submerged arc welding. In this study, three P91 welds with substantial differences in impact toughness and tensile properties are investigated. An extensive characterisation of precipitates in post-weld heat treated P91 welds was performed with electron microscopy (STEM), transmission kinetic diffraction, energy dispersive spectroscopy and an electrolytic precipitate extraction technique. Among the three welds, significant difference is observed in the amount of fine MX precipitates, which is correlated to yield strength, tensile strength and impact toughness. © 2016 Institute of Materials, Minerals and Mining Published by Maney on behalf of the Institute.


Kotecki D.J.,The Lincoln Electrical Company
Soldagem e Inspecao | Year: 2010

Duplex stainless steels (DSS, including super duplex stainless steels {SDSS}) have proven to be very useful engineering materials, albeit with somewhat different welding requirements than those of the more familiar austenitic stainless steels. Despite a generally good track record in welding of duplex stainless steels, certain pitfalls have been encountered with enough frequency that they deserve review. Inappropriate base metal specification often leads to unsuitable heat affected zone (HAZ) properties. Autogenous fusion zones are also of concern. This issue centers around nitrogen limits. The most frequently encountered is applying the UNS S31803 composition for 2205 DSS, instead of the S32205 composition. Inappropriate welding heat input arises most frequently with SDSS. While 0.5 to 1.5 kJ/mm is a normal heat input recommendation for SDSS, either a root pass or many small beads towards the low end of this heat input range tends to result in precipitation and/or secondary austenite formation in weld metal subjected to repeated thermal cycles from multiple weld passes. Inappropriate PWHT occurs when the enhanced nickel filler metals (typically 9% Ni) are used. DSS are not normally given PWHT, but extensive forming of heads, for example, or repair welding of castings, may require a postweld anneal. Specifications such as ASTM A790 and A890 call for annealing at 1040°C minimum, and the fabricator tends to use temperatures close to that minimum. However, the enhanced nickel filler metals require higher temperatures to dissolve sigma phase that forms during heating to the annealing temperature.


Hedrick S.,American Welding Society | Hisey D.,American Welding Society | Petkovsek J.,American Welding Society | Petkovsek J.,The Lincoln Electrical Company
Welding in the World | Year: 2015

This document addresses provisions to prevent loss of life and property from fire or explosions as a result of hot work and provides guidance for property owners and managers, supervisors, employees, and contractors who manage, supervise, and perform hot work. It does not address the health effects of working in high-temperature environments. © 2015, International Institute of Welding.


Trademark
The Lincoln Electrical Company | Date: 2012-05-01

Metal welding fluxes. Welding wire; metal powders and alloys for welding. Electric plasma cutters. Electric arc welders; wire feeders; power supplies for electric arc welders; welding electrodes.

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