Revista SUDURA

Nr. 2/2017

 
 

Revista Sudura 1/2017

The articoles abstracts are published in romanian and english languages

 

Trends in the development of ultra high strength steels and welded joints

Traian Fleșer

Universitatea Politehnica din Timișoara

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Abstract: High strength steels combine use characteristics, as high strength, low temperature toughness, weldability, formability. Their masses and lower sections have beneficial effects on the cost of processing, handling, including welding operations. Overall, the costs and benefits throughout the life of the product are favorable use of the products. These objectives are met microalloyed steel heat treated or processed cold or hot, fine grain. The main uses are in the manufacture of vehicles, lifting and transport systems, bridges and similar products, pipes, etc. The paper is a review of the technical and technological implications of achieving highest-strength steels and welded joints, in practical used. Keywords: ultra high strength steels, welded joints, filler materials

Development of a new range of consumables displaying lower fume emission rate and reduced hexavalent chromium CR VI designed for stainless steels welding

Sorin Crăciun*, Daniel Toncelli**, Bruno Leduey***

*AIR LIQUIDE WELDING – România, **AIR LIQUIDE WELDING – Italia, ***AIR LIQUIDE WELDING – Franța

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Abstract: It is commonly known that arc welding causes a series of harmful effects such as UV radiation, noise, and emission of fume. The hexavalent chromium Cr VI present in welding fumes generated by stainless steel welding consumables is reported to be a substance causing the damage of respiratory organs through inhalation exposure, considered extremely harmful for human body. Although is mandatory to use personal protection and collective protection equipment in order to preserve the health of operators and personnel nearby, it is obvious that any reduction of these harmful effects at the source – which is the welding consumable itself - will have a positive impact on working conditions. Even though the principle of hexavalent chromium Cr VI formation and the mechanism for its reduction are well known, it turns out in practice that the operating properties (weldability) of such low fumes welding consumables have proved to be totally inferior to those currently used on the field. Moreover, in case of covered electrodes, past experiences have demonstrated big difficulties in industrial production because of poor extrusion behaviour and poor adherence and covering’s resistance of such electrodes in their final stage. These are the reasons for which such consumables do not properly exist on the market. The present paper summarizes the development of a new range of welding consumables (stick electrodes and flux cored wires) grades 308L-309L-316L, which provides a significant reduction of fume emission rate (up to 40 %) and hexavalent chromium Cr VI (up to 60 %), contributing to an improved working environments for welders and in workshops. The new range of covered electrodes is able to be produced industrially without particular problems. Simultaneously, the Clearinox range is still able to display excellent operational performances requested by the market end users. Keywords: stainless steel, welding fume, emission rate, hexavalent chromium

 

European standards harmonized with European Directives related to electrotechnics and electronics, applicable to equipment for welding and allied processes

Petru Țenchea

Președinte ASRO/CT 129 - Sudare electrică, E-QSE CONSULTING S.R.L. Timișoara

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Abstract: The European Directives related to electrical equipment designed for use within certain voltage limits (LVD), to electromagnetic compatibility (EMC), and on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields) (EMF), the international, European and Romanian standardization bodies active in this field and the European standards harmonized with the directives, specific to welding and allied processes, are presented. Keywords: European Directive, harmonized standard, arc welding, resistance welding, low voltage, electromagnetic compatibility, human exposure, electromagnetic fields

 

Progress of the industry through international Qualifications

Luisa Coutinho, Monica Sibișteanu

Federația European Welding Federation (EWF)

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Abstract: Today’s changes in information, communication and manufacturing technologies respond to the deep and practical needs of the welding industry, which stimulates redesign of qualifications at international level. However, redesigning, to be effective, must take into account the latest trends, both in the educational and industrial branches. Moreover, the redesign of qualifications should aim not only in attracting new generations but also in improving the skills of those already qualified and experienced. This paper aims to show how international qualification can contribute to the development of the industry and how it can develop. Keywords: international qualifications, vocational educational training, welders qualifications, welding industry

 

 

THE SOCIETY INFORMS YOU

  • ASR Awards in 2017
  • ASR Conference of welding coordinators, 19-20.10.2017, Satu Mare
  • ASR events, Iaşi, 5-7 April 2017
  • Personals
  • Products presented by ASR members at Metalshow exhibition
  • Calendar of scientific events 2017
  • Calendar of ASR courses 2017
  • The list of companies with advertisements in SUDURA 2/2017