Residual stress in metal arc additive manufacturing of mill knives cutting edges

The additive manufacture process by electric arc is growing in importance due to its high material deposition rate and application in large components. However, the process also has its limitations regarding the poor quality of the surface finish and the generation of residual stresses that require...

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Bibliographic Details
Published inInternational journal of advanced manufacturing technology Vol. 104; no. 9-12; pp. 4457 - 4464
Main Authors Rusteiko, A. C., Angelo, J. D., del Conte, E. G. D.
Format Journal Article
LanguageEnglish
Published London Springer London 01.10.2019
Springer Nature B.V
Subjects
Additive manufacturing
Arc cutting
Arc deposition
CAE) and Design
Coated electrodes
Computer-Aided Engineering (CAD
Cutlery
Engineering
Industrial and Production Engineering
Knives
Longitude
Low carbon steels
Mechanical Engineering
Media Management
Original Article
Post-processing
Residual stress
Substrates
Surface finish
Tensile stress
Additive manufacturing
Mill knives
Residual stress
Metal arc
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Summary:The additive manufacture process by electric arc is growing in importance due to its high material deposition rate and application in large components. However, the process also has its limitations regarding the poor quality of the surface finish and the generation of residual stresses that require post-processing for improvements. This work investigates the metal arc additive manufacturing of mill knives cutting edges with the coated electrode DIN 8555 E6-UM-60-S and substrate material, the AISI 1020 steel. In this scenario, the effect on the change of the material deposition direction (longitudinal and transverse direction to sample length) in the residual stresses of the specimens is investigated. The following additional analyses were carried out: temperature behavior on the substrate during deposition and analysis of the microstructure in the material deposition region. The maximum average temperature in the specimens during the longitudinal deposition was 301 °C and, in the transverse, 347 °C. The longitudinal deposition resulted in lower values of residual stresses in relation to transverse deposition (difference of − 62.4 MPa at compression stress and 69.3 MPa at tensile stress).
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-019-04321-w