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Effects of Austenit...
Effects of Austenitisation Temperature and Multiple Tempering on the Microstructure and Impact Toughness of a 5 wt. % Cr Cold Work Tool Steel
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- Rehan, Arbab (författare)
- Högskolan Väst,Forskningsmiljön produktionsteknik(PTW),Uddeholms AB, SE-683 85, Hagfors, Sweden,PTW
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- Medvedeva, Anna (författare)
- Uddeholms AB, SE-683 85, Hagfors, Sweden.
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- Svensson, Lars-Erik, 1951- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW
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- Karlsson, Leif, 1952- (författare)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW
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(creator_code:org_t)
- 10th TOOL Conference, 2016
- 2016
- Engelska.
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Ingår i: 10th TOOL Conference, Tool, conference proceedings. - : 10th TOOL Conference. ; , s. 1-10
- Relaterad länk:
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http://tool2016.org/...
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http://tool2016.org/
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https://hv.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The microstructure and properties of a 5 wt.% Cr cold work tool steel were studied after austenitisation at 1020°C, 1050°C or 1075°C followed by single, double and triple tempering treatments at 525°C. The microstructures were investigated with scanning electron microscopy and X-ray diffraction and phase transformations were studied by dilatometry. Furthermore, hardness and Charpy un-notched and V-notched impact toughness testing was performed and results were correlated to observed microstructures. With higher austenitisation temperature, the martensite and bainite start temperatures were lowered resulting in microstructures containing a higher volume fraction of retained austenite. Retained austenite transformed into martensite on cooling from the tempering temperature. Specimens that were austenitised at 1050°C or 1075°C and tempered twice contained fresh martensite. Applying a third tempering was therefore required to guarantee a fully tempered microstructure. The second tempering resulted in an increase of the un-notched impact energy while the third tempering did not have a pronounced effect. A triple tempering procedure could be preferable when austenitising at high temperatures to avoid undesirable fresh martensite in the tool microstructure.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Nyckelord
- Cold work tool steel
- microstructure
- martensite
- retained austenite
- toughness
- X-ray diffraction
- scanning electron microscopy
- dilatometry
- Production Technology
- Produktionsteknik
- Manufacturing and materials engineering
- Produktions- och materialteknik
Publikations- och innehållstyp
- vet (ämneskategori)
- kon (ämneskategori)