Hot compression and fracture toughness of HSS composed hot strip work rolls |
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Authors: | Abdelylah Benazza Abdelkader Ziadi Boualem Serier Belabbes Bachir Bouiadjra Benali Boutabout |
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Affiliation: | (1) Department of Mechanical Engineering, University of Sidi Bel Abbes, Sidi Bel Abbes, 22000, Algeria |
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Abstract: | The rolls in the finishing stands must have good resistance to both wear and fire cracks. The use of high-speed steel at the
finishing stands has shown satisfactory results. The composition of this high-alloyed steel is an important parameter as the
most significant change lays on the type, morphology, and volume fraction of the eutectics carbides. The heat treatment of
these products consists of high temperature austenization followed by quenching and two temperings, as required in order to
increase their overall hardness and to completely eliminate residual austenite. The influence of tempering temperatures on
the mechanical properties of these products, determined using tensile, hot compression and fracture toughness tests, was studied
in this research work. Their corresponding failure micromechanisms were defined by means of the analysis of fracture surfaces. |
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