welding-alloys.com 19 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 able to achieve a high hardness from the first layer, however, applying a second layer or repairing an existing hardfacing deposit with these wires is not recommended (risk of spalling). Highly alloyed steels with hard phases Product Composition [%] - Fe balance Hardness C Mn Si Cr Mo Nb V Others 3 layers as welded Hard phases microhardness [HV] HARDFACE BN 0.5 2 1.4 Ni: 2 B: 4.5 60 - 65 HRC 2100 - 3300 HARDFACE BNC 2.5 2 0.9 12 5 B: 2.2 64 - 68 HRC 1350 - 3300 HARDFACE NCWB 1.1 0.6 0.7 22 4 3.5 W: 6.5 66 - 70 HRC 950 - 1450 HARDFACE X 1 0.3 1 8 0.6 4 60 - 65 HRC 1350 - 3300 HARDFACE FC 5 1.2 0.7 18 58 - 64 HRC 950 - 1450 HARDFACE HC 5 1 1.5 27 58 - 64 HRC 950 - 1450 HARDFACE HCNB 5.2 0.2 1.5 27 2.2 60 - 65 HRC 950 - 2000 HARDFACE CN 5 0.5 1 22 7 62 - 64 HRC 950 - 2000 HARDFACE CV 5.5 0.5 1 22 3 6 0.4 W: 1 62 - 64 HRC 950 - 2900 HARDFACE VN 5 0.7 1.2 22.5 10 62 - 65 HRC 950 - 2900 HARDFACE CNV 5.5 0.5 1.5 22 5 6 1 W: 2 63 - 67 HRC 950 - 2900 HARDFACE TIC 1.8 1.2 0.8 6.5 1.2 0.2 Ti: 5 57 - 60 HRC 950 - 3200 HARDFACE NB 1.5 0.8 0.8 6.5 6 55 - 58 HRC 950 - 3200 HARDFACE 168NB 1.3 1 1.8 6 8.5 Ti: 0.2 55 - 58 HRC 950 - 3200 The technical datasheets for these products are available on our website. The safety datasheets are also available on request. A huge range of cored wires can 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 cracks will occur in 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. Back to contents page
RkJQdWJsaXNoZXIy Mjk4MDU2NA==