Wear resistant layers obtained by using materials powder for overlay welding structural steel

摘要

Hardfacing is one of the most useful and eco-nomical ways to improve the performance of componentssubmitted to severe wear conditions. A study [1] was tocompare the microstructure and abrasion resistance ofhardfacing alloys reinforced with primary chromium car-bides, complex carbides or tungsten carbides. The resultsshowed that the wear resistance is determined by the size,shape, distribution and chemical composition of the car-bides, as well as by the matrix microstructure. The bestabrasion resistance was obtained in microstructures com-posed of eutectic matrix and primary M 7 C 3 or MC car-bides, while the higher mass losses were measured in com-pletely eutectic deposits.