LLC «TM.WELTEK»: 25 years in the world of flux-cored wires

In 1993 the staff of the E.O. Paton Electric Welding Institute organized an enterprise, the objective of which was restoration of flux-cored wire production in Ukraine. The new enterprise rented an unused shop on flux-cored wire production at OJSC «Dneprometiz» (City of Dniepr), which was put into operation already in 1964.
     Owing to the efforts of engineering-technical personnel and workers of the shop, production was restored and manufacturing of a large range of new modern grades of flux-cored wires was mastered. Here, the physical and moral wear of the equipment was a bottleneck, leading to high cost of labour and material resources, increasing the consumption of materials and cost of flux-cored wire manufacture, and did not ensure the required labour efficiency. The main shop equipment (4/250 drawing mills) was designed for producing flux-cored wires of 2.5–3.6 mm diameter, that did not meet the modern industry needs.

     For this reason, the enterprise implemented a set of measures for repair and upgrading of old equipment and purchase of new equipment, in particular, lines for flux-cored wire production, including double mill 2/500 for producing large diameter wires (4.0–6.0 mm), two six high mill 6/250 and eight high mill 8/250. All these mills are fitted with improved forming devices and storages. Production of flux-cored strips was restored. Furnaces for drying raw materials and flux-cored wire baking and, packing complex were purchased, and charge preparation compartment was upgraded.

     Availability of such equipment allowed optimizing the technology of producing flux-cored wires of 1.0 up to 6.0 mm diameters, developing and producing a number (more than 90 grades) of modern, often unique domestic welding and surfacing flux-cored wires, including those for spraying.

     Modern forms of product delivery to DSTU ISO 544 have been mastered by now: cardboard drums with packed wire weight of 150–300 kg; frame drums R 415 an R 435; plastic spools S200 and S300 and a number of specific variants of packing, made by customer request.
     As to their purpose and technical characteristics, the flux-cored wires of WELTEC grade are not inferior to products of leading foreign companies that is confirmed by their acceptance by many enterprises in Ukraine and abroad. For instance, flux-cored welding wire designed for welding low-carbon and low-alloyed structural steels has passed testing in keeping with European Directive No.305/2011 (System 2+) in the field of building components and received CE marking. Testing was performed by TUF Division Rheinland Industrie Service GmbH (Germany).

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     Controlling bodies of Ukraine on ecology, fire safety, labour safety, etc. issued permission documents for conducting the production activity of the enterprise.
     Flux-cored wires of WELTEC trade mark are used in the most diverse sectors of industry: in railway enterprises, works of mining-metallurgical complex, plants producing metal structures, machinebuilding plants, in shipbuilding, etc.
A.A. Golyakevich