Heat Treatment and Lubrication Analysis of the Surface Integrity of Cold Extruded Metals

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. Di...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing-green technology 2020-03, Vol.7 (2), p.329-336
Main Authors: Luiz Lara Oliveira, Thiago, Neves, Frederico Ozanan, De Paula, Thalita Cristina, Ancelotti Junior, Antonio Carlos
Format: Article
Language:English
Subjects:
Alloy steels
Aluminum
Aluminum base alloys
Billets
Canola
Cold
Cold extrusion
Cold working
Deformation
Extrusion billets
Extrusion dies
Factorial experiments
Finite element method
Hardness
Heat treatment
Heat treatments
Influence
Integrity
Load
Lubricants
Lubricants & lubrication
Lubrication
Manufacturing
Mechanical properties
Metal fatigue
Metals
Microhardness
Mineral oils
Residual stress
Roughness
Soybeans
Topography
Variables
Variance analysis
Vegetable oils
Viscosity
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Summary: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.
ISSN:2288-6206
2198-0810
DOI:10.1007/s40684-019-00091-8