Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel
Shock resistance cold work tool steel (S5) has many applications such as blades for sheet cutting, manufacturing of chisel and hammers etc. This Steel has the ability to accommodate residual stresses without premature failure. This work investigates the effect of carbide forming elements; V and Nb o...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-03-01
|
| Series: | Results in Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X23000122 |
| _version_ | 1797884509241212928 |
|---|---|
| author | Mahmoud A. Essam Ahmed Y. Shash Mohamed Kamal El-Fawakhry Emad El-Kashif Hassan Megahed |
| author_facet | Mahmoud A. Essam Ahmed Y. Shash Mohamed Kamal El-Fawakhry Emad El-Kashif Hassan Megahed |
| author_sort | Mahmoud A. Essam |
| collection | DOAJ |
| description | Shock resistance cold work tool steel (S5) has many applications such as blades for sheet cutting, manufacturing of chisel and hammers etc. This Steel has the ability to accommodate residual stresses without premature failure. This work investigates the effect of carbide forming elements; V and Nb on the microstructure and mechanical properties of S5 tool steel. Three heats were prepared with different content of carbide forming elements via vacuum melting and the effect of heat treatment [hardening, tempering and deep cryogenic treatment (DCT) at - 196 °C] on the mechanical properties was investigated. Retained austenite for quenched samples were calculated using X-ray diffraction method, also impact test was used to determine the toughness of all samples after different heat treatment conditions. Microstructure observation showed that the basic structure for the tested samples are tempered martensite for traditional S5 samples and fine tempered martensite for other micro alloyed samples. Scanning electron microscope (SEM) was also used to ensure that the amount of retained austenite have been eliminated or reduced due to deep cryogenic treatment. Hardness (HRC) after quenching process reached 51 HRC, further increase in hardness values has been obtained after DCT due to reduction of retained austenite. The toughness results showed lower values for deep cryogenic treatment than conventional heat treatment samples; this is mainly due to the reduction in retained austenite content. |
| first_indexed | 2024-04-10T04:07:41Z |
| format | Article |
| id | doaj.art-d1f9a40d4cb94c0ebc49fb9f603bce84 |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-04-10T04:07:41Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Materials |
| spelling | doaj.art-d1f9a40d4cb94c0ebc49fb9f603bce842023-03-13T04:16:05ZengElsevierResults in Materials2590-048X2023-03-0117100374Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steelMahmoud A. Essam0Ahmed Y. Shash1Mohamed Kamal El-Fawakhry2Emad El-Kashif3Hassan Megahed4Mechanical Engineering Department, Higher Technological Institute (HTI), 10th of Ramadan City, EgyptMechanical Design and Production Department, Faculty of Engineering, Cairo University, Cairo, Egypt; Faculty of Engineering and Materials Science, German University in Cairo, Cairo, Egypt; Corresponding author. Mechanical Design and Production Department, Faculty of Engineering, Cairo University, Cairo, Egypt.Steel and Ferroalloys Department, Central Metallurgical Research and Development Institute (CMRDI), Cairo, EgyptMechanical Design and Production Department, Faculty of Engineering, Cairo University, Cairo, EgyptMechanical Design and Production Department, Faculty of Engineering, Cairo University, Cairo, EgyptShock resistance cold work tool steel (S5) has many applications such as blades for sheet cutting, manufacturing of chisel and hammers etc. This Steel has the ability to accommodate residual stresses without premature failure. This work investigates the effect of carbide forming elements; V and Nb on the microstructure and mechanical properties of S5 tool steel. Three heats were prepared with different content of carbide forming elements via vacuum melting and the effect of heat treatment [hardening, tempering and deep cryogenic treatment (DCT) at - 196 °C] on the mechanical properties was investigated. Retained austenite for quenched samples were calculated using X-ray diffraction method, also impact test was used to determine the toughness of all samples after different heat treatment conditions. Microstructure observation showed that the basic structure for the tested samples are tempered martensite for traditional S5 samples and fine tempered martensite for other micro alloyed samples. Scanning electron microscope (SEM) was also used to ensure that the amount of retained austenite have been eliminated or reduced due to deep cryogenic treatment. Hardness (HRC) after quenching process reached 51 HRC, further increase in hardness values has been obtained after DCT due to reduction of retained austenite. The toughness results showed lower values for deep cryogenic treatment than conventional heat treatment samples; this is mainly due to the reduction in retained austenite content.http://www.sciencedirect.com/science/article/pii/S2590048X23000122Tool steelCold workShock resistingDeep cryogenic treatmentHardnessImpact toughness |
| spellingShingle | Mahmoud A. Essam Ahmed Y. Shash Mohamed Kamal El-Fawakhry Emad El-Kashif Hassan Megahed Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel Results in Materials Tool steel Cold work Shock resisting Deep cryogenic treatment Hardness Impact toughness |
| title | Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel |
| title_full | Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel |
| title_fullStr | Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel |
| title_full_unstemmed | Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel |
| title_short | Influence of micro-alloying elements and deep cryogenic treatment on microstructure and mechanical properties of S5 cold work shock resisting tool steel |
| title_sort | influence of micro alloying elements and deep cryogenic treatment on microstructure and mechanical properties of s5 cold work shock resisting tool steel |
| topic | Tool steel Cold work Shock resisting Deep cryogenic treatment Hardness Impact toughness |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X23000122 |
| work_keys_str_mv | AT mahmoudaessam influenceofmicroalloyingelementsanddeepcryogenictreatmentonmicrostructureandmechanicalpropertiesofs5coldworkshockresistingtoolsteel AT ahmedyshash influenceofmicroalloyingelementsanddeepcryogenictreatmentonmicrostructureandmechanicalpropertiesofs5coldworkshockresistingtoolsteel AT mohamedkamalelfawakhry influenceofmicroalloyingelementsanddeepcryogenictreatmentonmicrostructureandmechanicalpropertiesofs5coldworkshockresistingtoolsteel AT emadelkashif influenceofmicroalloyingelementsanddeepcryogenictreatmentonmicrostructureandmechanicalpropertiesofs5coldworkshockresistingtoolsteel AT hassanmegahed influenceofmicroalloyingelementsanddeepcryogenictreatmentonmicrostructureandmechanicalpropertiesofs5coldworkshockresistingtoolsteel |