New nonconventional process: cold and hot laser surface treatment of steels

Giuseppe Palombarini; Giuseppe Daurelio; Giuseppe Chita; Fabrizio Memola Capece Minutolo

doi:10.1117/12.515446

10 November 2003 New nonconventional process: cold and hot laser surface treatment of steels

Giuseppe Palombarini, Giuseppe Daurelio, Giuseppe Chita, Fabrizio Memola Capece Minutolo

Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003) https://doi.org/10.1117/12.515446
Event: XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2002, Wroclow, Poland

Abstract

This experimental research work presents for the first time the results obtained by using a new non-conventional process, that is a cold and hot laser surface tratment on steels. The aim is to obtain Surface Hardening Structure by a sharp change in temperature obtained by employing a laser beam that passes on steel surfaces , having many tenths degrees below zero (≈ -196°C). The materials experimented have been some different Carbon Steels as Constructional ones (Fe 510 - Fe 360 B) and Medium and High Carbon content Steels ( C40-C70 ). The innovation of this new process consists havig to use a powerfull cooling medium - the liquid Nitrogen - into a Dewar recipient in which the steel has immersed for some minutes. The preliminary researches and tests have shown that, also on steels having a low content of Carbon, the Surface Hardness has significantly increased, so to reach values up to an increase of about 50% respect to the relate value measured on the base material.

Citation Download Citation

Giuseppe Palombarini, Giuseppe Daurelio, Giuseppe Chita, and Fabrizio Memola Capece Minutolo "New nonconventional process: cold and hot laser surface treatment of steels", Proc. SPIE 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (10 November 2003); https://doi.org/10.1117/12.515446

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