Welding of Non-Ferrous Metals by the Argon Arc & Argonaut Processes

The paper deals with the latest inert -gas arc method of welding of non-ferrous metals

Развитие сварки в инертных газах (Обзор)

Рассмотрена история возникновения и развитие дуговой сварки в инертных газах. Ее появление основано на опыте применения атомно-водородной сварки и сварки под флюсом. Первые способы сварки ТИГ и МИГ созданы в начале 1940-х годов и были применены при изготовлении алюминиевых конструкций. В последующие годы были разработаны методы управления переносом металла в сварочную ванну, созданы различные технологии сварки цветных металлов и сплавов.The history of origination and development of inert-gas arc welding was considered. Its appearance was based on the experience of application of atomic-hydrogen welding and submerged arc welding. The first TIG and MIG welding methods were developed at the beginning of the 1940s, and were applied to fabricate aluminium structures. Later, the methods for controlling metal transfer into the weld pool were developed, and different technologies for welding non-ferrous metals and alloys were elaborated

Research at the Institute of electrotechnology in the field of induction heating

The paper informs generally about the activities at the Institute of Electrotechnology in Hannover, Germany in the fields of education and research in Electrotechnology. Several actual research projects are described in detail in the field of induction heating. A second paper written by Baake and Spitans gives an overview about the activities at the institute in induction melting

Investigation of MIG welding to the corrosion behaviour of heat treated carbon steel

The corrosion behaviour of metal inert gas (MIG) welded heat treated carbon steel was investigated. Filler material of ER308L and ER70S were used to complete the butt joint welding on non-heat treated and heat treated low carbon steel (AISI 1010). The welding heat input was manipulated by varying the welding voltage for MIG welding process. The microstructures for welded specimens were analysed with the optical microscope. During the electrochemical test, the corrosion rate on the carbon steel was determined. Microstructural analysis for specimen without cleaning and after cleaning was analysed by using SEM. Results showed that the increase in welding heat input was highly significant to the corrosion rate of carbon steel. The welding heat input was able to change the ferrite content on the microstructure of specimen which affected the corrosion rate on the carbon steel

Assessing carbon dioxide emission reduction potentials of improved manufacturing processes using multiregional input output frameworks

Evaluating innovative process technologies has become highly important within the last decades. As standard tools different Life Cycle Assessment methods have been established, which are continuously improved. While those are designed for evaluating single processes they run into difficulties when it comes to assessing environmental impacts of process innovations at macroeconomic level. In this paper we develop a multi-step evaluation framework building on multi regional input–output data that allows estimating macroeconomic impacts of new process technologies, considering the network characteristics of the global economy. Our procedure is as follows: i) we measure differences in material usage of process alternatives, ii) we identify where the standard processes are located within economic networks and virtually replace those by innovative process technologies, iii) we account for changes within economic systems and evaluate impacts on emissions. Within this paper we exemplarily apply the methodology to two recently developed innovative technologies: longitudinal large diameter steel pipe welding and turning of high-temperature resistant materials. While we find the macroeconomic impacts of very specific process innovations to be small, its conclusions can significantly differ from traditional process based approaches. Furthermore, information gained from the methodology provides relevant additional insights for decision makers extending the picture gained from traditional process life cycle assessment.DFG, SFB 1026, Sustainable Manufacturing - Globale Wertschöpfung nachhaltig gestalte

State of the Art of Laser Hardening and Cladding

In this paper an overview is given about laser surface modification processes, which are developed especially with the aim of hardness improvement for an enhanced fatigue and wear behaviour. The processes can be divided into such with and without filler material and in solid-state and melting processes. Actual work on shock hardening, transformation hardening, remelting, alloying and cladding is reviewed, where the main focus was on scientific work from the 21st century

Surface treatments for nickel and nickel-base alloys

Surface treatments of nickel and nickel alloys by diffusion coating, electroplating, explosive hardening, peening, and other method

Materials data handbook: Aluminum alloy 5456

A summary of the materials property information for aluminum alloy 5456 is presented. The scope of the information includes physical and mechanical property data at cryogenic, ambient, and elevated temperatures. Information on material procurement, metallurgy of the alloy, corrosion, environmental effects, fabrication, and joining techniques is developed

Study guide and laboratory reports on “Technology of Structural materials and Material Science” Part 1

“Technology of Structural materials and Material Science” is one of the basic technical disciplines in the syllabus for “Engineering mechanics” field of study. During the implementation of laboratory work considerable attention is given to the educational and experimental work for the study of materials that are used in different branches of an industry and manufacturing technology; alloy’s mechanical properties (tensile strength, hardness, toughness); forming technology, welding, cutting, milling and powder metallurgy. After every practical class in the laboratory, students will fill the laboratory report. The content of the laboratory class corresponds with the syllabus of the course “Material Science” for students of the “Engineering mechanics” field of study. The purpose of this manual is to provide guidelines for the students in preparation for independent laboratory work and to project its results in the laboratory reports.Introduction...3 Safety during lab activities...4 1.Mechanical properties: tensiletestand impact strength...5 2. Mechanical properties: hardness...14 3.Metal forming...21. 4. Weldingof metals...30 5.Mechanical treatment of metals(turning and milling) ...44 Glossary...62 Reference...6