MEASUREMENT OF QUENCHING INTENSITY, CALCULATION OF HEAT TRANSFER COEFFICIENT AND GLOBAL DATABASE OF LIQUID QUENCHANTS

Božidar Liščić, Tomislav Filetin

Abstract


This paper explains the need for a database of cooling intensities for liquid quenchants, in order to predict the quench hardness, microstructure, stresses and distortion, when real engineering components of complex geometry are quenched. The existing laboratory procedures for cooling intensity evaluation, using small test specimens, and Lumped-Heat-Capacity Method for calculation of heat transfer coefficient, are presented. Temperature Gradient Method for heat transfer calculation in workshop conditions, when using the Liscic/Petrofer probe, has been elaborated. Critical heat flux densities and their relation to the initial heat flux density, is explained. Specific facilities for testing quenching intensity in workshop conditions, are shown.

The two phase project of the International Federation for Heat Treatment and Surface Engineering (IFHTSE), as recently approved, is mentioned.


Keywords


quenching; modeling; cooling intensity; database

Full Text:

PDF

Refbacks

  • There are currently no refbacks.




Copyright (c) 2012 Božidar Liščić, Tomislav Filetin

License URL: http://creativecommons.org/licenses/by-nc-nd/3.0/

................................

Articles published in the journal of Materials Engineering / Materialove inzinierstvo are indexed in Directory of Open Access Journals, Index Copernicus International, Google Scholar, Open J-GateBielefeld Academic Search Engine, Academic journal database, The Open Access Digital Library, ABC Chemistry - free chemical information, New jour, Academic Keys, Ulrich's Serials Solutions (a Proquest Business), EBSCO Academic Search, SHERPA/RoMEOGenamics JournalSeek, New York University Libraries, TrueserialsProQuest Database: ProQuest Engineering Journals, Cornell University Library,Scientific indexing services. You can find us on Facebook, Google Groups and Linked IN.