These wires are composed of hard phases in a matrix where the structure depends on the composition of the filler metal.
Products having a high boron content offer the best solution to fight against a wide variety of pure abrasive wear. HARDFACE BN, HARDFACE BNC and HARDFACE NCWB are ablre to achieve a high hardness from the first layer, however, applying a second layer or repairing and existing hardfacing deposit will these wires is not recommended (risk of spalling).
A huge range of cored wires van be designed and manufactured simply by adjusting or adding specific elements. For example, by adding the suitable amount of niobium, our HARDFACE HCNB-O will provide better wear performance from the first layer, compensating the effect of dilution onto the substrate.
With most of these wires, shrinkage craks will occur int the deposit. These are the result of the natural relaxation of stresses in the deposit. Stress-relief cracking does not usually occur when using cored wires that have been designed for impact resistance.
