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- 저자 : Frederico Ozanan Neves (검색결과 1 건)
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Heat Treatment and Lubrication Analysis Over Surface Integrity of Cold Extruded Metals
Thiago Luiz Lara Oliveira,Frederico Ozanan Neves,Thalita Cristina De Paula,Antonio Carlos Ancelotti Junior 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.7 No.2
Cold forming is a process which is largely employed in industry. Thisprocess may have impacts on mechanical properties and surface integrity. This paper presents a study on Surface Integrity (SI) within the context of cold extruded billets with two different materials, steel and aluminium alloys. Different lubricant oils were used in this study, and heat treatment was employed after cold processing. Typical surface alterations such as micro-hardness and roughness were analysed, and a FEM analysis was used to predict the areas with increasing hardness. An analysis of test variance (ANOVA) was conducted, aiming to determine the influence factors of the experiments. Thus, influence factors like oil performance and extrusion load were investigated. The performance and influence of oils on cold extrusion processing for different materials were analysed. Due to the effects of lubricants on surface integrity in terms of hardness and roughness, a comparison was given with projections forsubstituting mineral oils for vegetable oils without losing functional performance.
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