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Influence of cooling speed on the microstructure and wear behaviour of hypereutectic FeCrC hardfacingsHornung, J. ...The main focus of this work is to show influences of the cooling rate on the microstructure and wear performance of Fe-Cr-C hardfacings. The coatings were produced by welding. The weld overlays were ... cooled from the molten stage in selected variations: (i) standard cooling - cooling on air at the steel welding table; (ii) passive cooling - cooling of the base material during the hardfacing process with a water cooled cooper plate with 12 1C; (iii) active cooling - cooling of the welding seam behind the main arc with CO2 gas at temperature of -80 1C. For each cooling situation the temperature of the weld seam was measured in the melt pool with help of thermocouple. It was shown, that different cooling conditions can lead to the significant changes in the cooling-off time t8/5, dilution of the hardfacing with substrate and microstructural features of the hardfacings under investigation. Three different wear tests (three-body abrasion according to ASTM G65 standard, impact/abrasion and solid particle erosion) were performed to study the wear performances of Fe-Cr-C hardfacing. Testing results have shown that if the cooling-off time t8/5 is too short it influences the brittleness and increases the residual stresses of the Fe-Cr-C hardfacing, which lowers its impact resistance. The effect of the cooling rate is in good correlation with wear test results and gives promise for further microstructure and process optimisation for the improved tribological performance.Source: Materials Science & Engineering. A, Structural materials: Properties, Microstructure and Processing. - ISSN 0921-5093 (Vol. 576, 2013, str. 243-251)Type of material - article, component partPublish date - 2013Language - englishCOBISS.SI-ID - 12832283
Author
Hornung, J. |
Zikin, A. |
Pichelbauer, K. |
Kalin, Mitjan |
Kirchgaßner, M.
Topics
hitrost hlajenja |
erozija |
tribologija |
obraba |
zaostale napetosti |
Fe-Cr-C |
cooling speed |
erosion |
tribology |
abrasion |
residual stresses
source: Materials Science & Engineering. A, Structural materials: Properties, Microstructure and Processing. - ISSN 0921-5093 (Vol. 576, 2013, str. 243-251)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Hornung, J. | |
Zikin, A. | |
Pichelbauer, K. | |
Kalin, Mitjan | 14556 |
Kirchgaßner, M. |
Source: Personal bibliographies
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