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Chandel, R. S.; Seow, H. P.; Cheong, F. L.

doi:10.1023/a:1006645202182

Cited by 4 publications

(1 citation statement)

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“…ducted by submerged arc welding (SAW). [7,8] The microAlloys used for hardfacing are those of iron, nickel, copstructures of the hardfacing alloys were analyzed, and their per, and cobalt. Among them, hypereutectic high-chromium hardness, wear resistance, and fracture toughness were evalwhite irons are most widely used in rolls, dies, and pressure uated.…”

Section: Introductionmentioning

confidence: 99%

Correlation of microstructure with the wear resistance and fracture toughness of hardfacing alloys reinforced with complex carbides

Choo

Kim

Euh

et al. 2000

Metall Mater Trans A

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A correlation was made of the microstructure, wear resistance, and fracture toughness of hardfacing alloys reinforced with complex carbides. The hardfacing alloys were deposited twice on a low-carbon steel substrate by a submerged arc welding (SAW) method. In order to investigate the effect of complex carbides, different fractions of complex carbide powders included inside hardfacing electrodes were employed. Microstructural analysis of the hardfaced layer showed that cuboidal carbides, in which a TiC carbide core was encircled by a WC carbide, and rod-type carbides, in which W and Ti were mixed, were homogeneously distributed in the bainitic matrix. In the surface layer hardfaced with FeWTiC powders, more complex carbides were formed, because of the efficient melting and solidification during hardfacing, than in the case of hardfacing with WTiC powders. As the volume fraction of complex carbides, particularly that of cuboidal carbides, increased, the hardness and wear resistance increased. In-situ observation of the fracture process showed that microcracks were initiated at complex carbides and that shear bands were formed between them, leading to ductile fracture. The hardness, wear resistance, and fracture toughness of the hardfacing alloys reinforced with complex carbides were improved in comparison with high-chromium white-iron hardfacing alloys, because of the homogeneous distribution of hard and fine complex carbides in the bainitic matrix.

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Section: Introductionmentioning

confidence: 99%