Wpływ niobu na właściwości warstw wierzchnich napawanych samoosłonowymi drutami proszkowymi o stopiwie Fe-Cr-C
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Abstract
Badano wpływ zawartości niobu w samoosłonowych drutach proszkowych ze stopiwem Fe-Cr-C na twardość, strukturę oraz odporność na zużycie ścierne typu me- tal-minerał napoin jedno- i dwuwarstwowych. Stwierdzono niejednoznaczny wpływ zmiany zawartości niobu w zakresie od 4 do 10% na te właściwości w zależności od liczby warstw napawanych. Zauważono, że wyżarzanie odprężające w temperaturze 650 oC powoduje zmniejszenie twardości, jak również zwiększenie zużycia ściernego wszystkich badanych napoin.
Effect of niobium on properties of hardfaced layers surface welded by Fe-Cr-C open arc flux-cored wire electrodes
The influence of niobium in Fe-Cr-C open arc flux-cored wires electrodes on hardness, microstructure and abrasion resistance of overlay welds consisted of one and two layers are investigated. It was found that variation of niobium content in range from 4 to 10% has ambiguous effect on these properties depending on number of layers. It was found also that heat treatment at 650 oC cause fall dawn hardness and abrasion resistance of all investigated overlay welds.
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