Wear Resistance of Fe-based Nanostructured Hardfacing.

The purpose of this work was to study the microstructural evolution and wear resistance of a nanostructured iron-based alloy deposited by FCAW process. Two samples with one and two layers were welded under Ar-20CO 2 shielding and heat input of 3.5 kJ/mm. Chemical composition was determined and microstructure was studied using both optical and scanning electron microscopy and X ray diffraction. Hardness, cristallite size, percentage of dilution and abrasive wear resistance were measured. The hardness of the deposit was found between 800 and 920 HV 2 , depending on the number of layers as well as the chemical composition of the samples. The wear test results were discussed in relation to chemical composition, microstructure and hardness. [ABSTRACT FROM AUTHOR]