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Mechanical properties of engineering steel produced via ingot and c.c. route for automotive components
Author(s) -
Fattorini Francesco,
Ronchiato Giulio,
Baffigi Mauro,
Di Gianfrancesco Enrico,
Rigoni Sergio
Publication year - 1989
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198900958
Subject(s) - metallurgy , mechanical engineering , engineering , ingot , materials science , composite material , alloy
A comparison has been made of engineering steels produced by ingot and continuous casting. Particular attention has been paid to the possible influence of ghost lines, sometimes present in c.c. products, on the service behaviour of mechanical components. Experimentation has been concentrated on 40 CrMo 4 steel, used by an Italian automobile producer to make wheel hubs for motor‐cars. The comparison has been carried out on the basis of tensile strength and ductility properties and low and high cycle fatigue behaviour. Rotating bending fatigue tests have also been conducted directly on wheel hubs, reproducing the main on‐road fatigue conditions affecting these components. The experimentation has revealed no influence of ghost lines on the mechanical component behaviour and a complete tie‐in between metallurgical characteristics and the static and dynamic properties of materials produced by the two steelmaking processes.