10 November 2003 New nonconventional process: cold and hot laser surface treatment of steels
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Proceedings Volume 5120, XIV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2003); doi: 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.
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Giuseppe Palombarini, Giuseppe Daurelio, Giuseppe Chita, 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); doi: 10.1117/12.515446; https://doi.org/10.1117/12.515446
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KEYWORDS
Carbon

Iron

Laser therapeutics

Liquids

Nitrogen

Heat treatments

Laser surface treatment

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