The choice of welding alloys is made among a wide range of alloys that are available in flux-cored wire, submerged arc wire, electrodes or Mig wire and have been especially developed for coat welding both for resistance to abrasion and corrosion;
The welding procedure is chosen on the basis of guaranteeing homogeneity throughout the entire coating
surface. Such homogeneity is guaranteed as regards both chemical, mechanical and hardness characteristics thanks to our achievements in research and development.
As far as the homogeneity of the repaired surface is concerned the use of finalised materials is indispensable, in other words materials that have chemical-mechanical characteristics that are as much in line as possible with the needs of the plant indicated only for the melting part of the welding material both as a stabilisation moment of the
welding arc as well as with elements that can ideally be incorporated on the bath in a stable and homogenous form.
By using alloys in conformity with the customer’s needs, one can make structures that present bigger chromium carbides than those present in the melted material. For this reason the life of equipment armoured with these alloys is longer than that of non-armoured equipment.
Whether a welding alloy will completely or only in part be wear resistant mainly depends on the welding technology used.
This is especially true when coat welding is carried out at high speed and with thin run welding. The welding technology that is chosen fixes the degree of dilution with the base material and with it the alloy’s content, the formation of the structure and the resistance to wear of the weld coating.
Welding is carried out with thin run welding at high speed and low dilution.
Through the multitude of thin runs one obtains a pure weld with maximum wear resistance.
Through special thin run weldings and maintaining the interpass temperatures under control it is possible to weld special alloy materials without the welded part coming off and/or tearing under mechanical stress.
The characteristics of the equipment with parts resistant to abrasion and/or corrosion is mainly that of having a basic support with mechanical characteristics obtained from static calculations and a protection thickness of those parts directly exposed to corrosion and/or abrasion that determines an increase in the life of the equipment itself.
As can be seen from the photos, Elettromeccanica Viotto is able to meet any requirement of this specific field.
Elettromeccanica Viotto’ long experience and its collaboration with Corodur (a highly technological welding wire and material manufacturing company) are the best guarantee one can have and make the company a leader in the field of anti-corrosive and anti-wear repairs both for the quality and for the product itself.
Our company also offers consulting and elaboration of armour solutions and anti-wear and anticorrosion coating as well as the well known constructions and machining.
