Structural diagram of high-carbon deposited layers

• Published in: Welding international 1996-01, Vol.10 (11), p.898-900
• Main Authors: Elagina, OYu, Livshits, LS, Mal'tseva, MA
• Format: Article
• Language: English
• ISSN: 0950-7116; 1754-2138
• DOI: 10.1080/09507119609549109

Reconditioning of components with a high degree of wear operating under severe conditions is usually carried out by multipass electric arc surfacing. There are a large number of surfacing materials increasing the wear resistance of the deposited layer under different wear conditions. The existence of such a large number complicates the selection of filler material for every specific case of reconditioning components, thus making it necessary to classify these materials on the basis of a generalized feature. From of the viewpoint of the wear resistance of the deposited layer, the most important criterion for different operating conditions is the structural and phase state. The structural Schaeffler diagram is used most extensively at present. However, its application is restricted to low-carbon steels with a carbon content of 0.2%. In addition, hardfacing materials contain a solid phase in the form of carbide formations which strongly affect the structure and properties of the alloy. The presence of carbides in the alloys is not taken into account in this diagram, and in calculations of the chromium equivalent of ferrite formation no account is made of a large number of carbide-forming elements such as V, W, Ti. The structural diagram of high-carbon, high-alloy deposited layers for two-layer surfacing was developed in two stages: construction of the structural diagram of the matrix of the alloy and a carbide formation diagram.