Microstructure and Wear Resistance of Plasma Surface Layers Based of Alloy Mixture CuSn10/CrxCy

Abstract

The article relates to the study of the microstructure and wear resistance of the surface layers obtained by plasma heating of the powder-clad layer of the CuSn10 alloy and the coating of the OK 84.78 welding electrode. Microstructure studies, hardness measurements and wear tests have shown that coatings based on a tin-bronze alloy and with the addition of OK 84.78 are successfully obtained. Coating from CuSn10 + 20% alloy mixture OK 84.78 has a hardness of about 500-700 HV, and from CuSn10 alloy it is about 310-564 HV. Meanwhile, the wear resistance also increases in series: Steel St3 < coating (CuSn) < coating (CuSn + 20% OK 84.78).

Study of Wear of an Alloyed Layer with Chromium Carbide Particles after Plasma Melting

“…First of all, the wear characteristics were influenced by surface hardness and porous structure, which are among the most important parameters affecting wear behavior [12]. The results of a study [22] examining the influence of manufacturing parameters on Brinell hardness and porosity values support these interpretations. Figure 4 shows the structure of the alloyed layer made from a mixture of CuSn10 + 20% CrxCy with a paste thickness of 0.25 mm.…”

“…In initial experiments, the low wear resistance of the CuSn10 layer could be due to cracks or unexpected inclusions. When studying the wear surfaces of tested materials containing CuSn10 in different proportions, it is clear that the surface structure of materials containing only CuSn10 is different [12,22]. First of all, the wear characteristics were influenced by surface hardness and porous structure, which are among the most important parameters affecting wear behavior [12].…”

“…Most works study the alloying factors of bronze [10][11][12][19][20][21][22]. In [12,22], plasma melting of a bronze-chromium alloy was used.…”

“…Most works study the alloying factors of bronze [10][11][12][19][20][21][22]. In [12,22], plasma melting of a bronze-chromium alloy was used. An increase in the hardness of the composition and an increase in wear resistance when tested for abrasive wear on a fixed abrasive was shown.…”

“…It is known that metal-ceramic composites or metal-ceramics combine the hardness of ceramics and the strength of the metal. In particular, carbide compounds, such as WC, Ti3SiC2, TiC, SiC, TiCN, and B4C, are often used in combination with copper alloys to produce composite materials [18][19][20][21][22]. These carbides are added as refractory phases to the copper matrix of copper-carbide composite materials.…”