INFLUENCE OF COOLING RATE DURING QUENCHING ON IMPACT TOUGHNESS OF A HOT-WORK TOOL STEEL AT AMBIENT TEMPERATURE AND AT 200 °C
|
Title | INFLUENCE OF COOLING RATE DURING QUENCHING ON IMPACT TOUGHNESS OF A HOT-WORK TOOL STEEL AT AMBIENT TEMPERATURE AND AT 200 °C |
Authors | |
Abstract | Gross cracking of die-casting dies with inferior toughness sometimes occurs through too low preheating temperature and/or too slow cooling during quenching. This study aimed to clarify the influence of cooling rate on the toughness of the hot-work tool steel grade Uddeholm Vidar Superior at ambient temperature and at 200 °C, a typical preheating temperature for aluminium die-casting dies. Toughness was measured through instrumented Charpy V-notch impact testing. The decrease in energy absorption with increasing cooling time between 800°C and 500°C both at both ambient temperature and 200 °C was pronounced. At ambient temperature, the decrease in total energy was a consequence of a decrease in initiation energy whereas, at 200 °C, the decrease in total energy was due to a decrease in propagation energy. |
Publisher | Faculty of Mechanical Engineering University of Zilina, Slovak Republic |
Date | 2013-05-18 |
Source | Materials Engineering - Materiálové inžinierstvo (MEMI) Vol 20, No 3 (2013) |
Rights | Articles published in this Open Acess Journal are licensing using Creative Commons License. Except where otherwise noted, individual articles in the Materials Engineering - Materiálové inžinierstvo journal are licensed under a CREATIVE COMMONS ATTRIBUTION-NON COMMERCIAL-NO DERIVS 3.0 UNPORTED LICENSE (for details please visit http://creativecommons.org/licenses/by-nc-nd/3.0/ ).Copyrights for articles published in Materials Engineering - Materiálové inžinierstvo (MEMI) journal are retained by the authors, with first publication rights granted to the journal. The journal/publisher is not responsible for subsequent uses of the work.Authors are permited to self-archive the final version of their published articles into institutional repositories. Authors can use the final version of published article for the non-exclusive distribution with an acknowledgement of its previous publication in this journal.Authors are allowed to post their work to institutional repositories prior to and during the submission (evaluation) process. |