Effects of cryogenic cooling on the surface integrity in hard turning of AISI D6 steel
| Autor: | Adilson José de Oliveira, Welber Vasconcelos Leadebal, Nicolau Apoena Castro, Anderson Clayton Alves de Melo |
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| Rok vydání: | 2018 |
| Předmět: |
AISI D6 steel
0209 industrial biotechnology Materials science Hard turning Aerospace Engineering 02 engineering and technology engineering.material Industrial and Manufacturing Engineering chemistry.chemical_compound 020901 industrial engineering & automation 0203 mechanical engineering Machining Residual stress Surface roughness Cryogenic cooling Mechanical Engineering Applied Mathematics Metallurgy General Engineering Microstructure Grinding Surface integrity 020303 mechanical engineering & transports chemistry Boron nitride Automotive Engineering Tool steel engineering PCBN tools |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
| ISSN: | 1806-3691 1678-5878 |
| DOI: | 10.1007/s40430-017-0922-6 |
| Popis: | Methods able to enhance surface integrity of machined components have been one of the emerging areas in manufacturing engineering, and a technique that has been providing satisfying results in the last years is cryogenic machining. Besides promoting surface integrity improvement, it is considered an alternative to the use of conventional cutting fluids, which is in accordance with the latest global trends for sustainable means of production. In this sense, replacing grinding operation, which uses large volumes of conventional cutting fluids, by hard turning assisted by liquid nitrogen, for example, could be a good choice. The aim of this work was to investigate the effects of cryogenic cooling on the surface integrity of quenched and tempered AISI D6 tool steel after turning operation. Dry and cryogenic turning trials with polycrystalline cubic boron nitride tools were performed and the results of surface integrity (surface roughness and topography, microhardness and residual stresses, as well as the modified microstructure of the deformed layer) were analyzed for comparison. The results showed that cryogenic cooling played an important role in modifying the workpiece surface integrity, providing low values of surface roughness (similar to those obtained in grinding operations), as well as higher values of surface microhardness and compressive residual stresses as compared to the dry condition. |
| Databáze: | OpenAIRE |
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