Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel
A novel hot-work die steel, named 5Cr5Mo2, was designed to obtain superior thermal stability. The proposed alloy is evaluated in terms of its hardness, microstructure, and tempering kinetics. Compared with the commonly used H13 steel, the softening resistance of the designed steel is superior. Based...
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| Format: | Article |
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MDPI AG
2020-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/4/238 |
| _version_ | 1818002012300640256 |
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| author | Ningyu Du Hongwei Liu Paixian Fu Hanghang Liu Chen Sun Yanfei Cao Dianzhong Li |
| author_facet | Ningyu Du Hongwei Liu Paixian Fu Hanghang Liu Chen Sun Yanfei Cao Dianzhong Li |
| author_sort | Ningyu Du |
| collection | DOAJ |
| description | A novel hot-work die steel, named 5Cr5Mo2, was designed to obtain superior thermal stability. The proposed alloy is evaluated in terms of its hardness, microstructure, and tempering kinetics. Compared with the commonly used H13 steel, the softening resistance of the designed steel is superior. Based on SEM and transmission electron microscopy (TEM) observations, a higher abundance of fine molybdenum carbides precipitate in 5Cr5Mo2 steel. Strikingly, the coarseness rate of the carbides is also relatively low during the tempering treatment. Moreover, owing to their pinning effect on dislocation slip, the dislocation density of the 5Cr5Mo2 steel decreases more slowly than that of the H13 steel. Furthermore, a mathematical softening model was successfully deduced and verified by analyzing the tempering kinetics. This model can be used to predict the hardness evolution of the die steels during the service period at high temperature. |
| first_indexed | 2024-04-14T03:41:24Z |
| format | Article |
| id | doaj.art-60095da5aff74910bef70c92c0c9d026 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-14T03:41:24Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-60095da5aff74910bef70c92c0c9d0262022-12-22T02:14:31ZengMDPI AGCrystals2073-43522020-03-0110423810.3390/cryst10040238cryst10040238Microstructural Stability and Softening Resistance of a Novel Hot-Work Die SteelNingyu Du0Hongwei Liu1Paixian Fu2Hanghang Liu3Chen Sun4Yanfei Cao5Dianzhong Li6Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaA novel hot-work die steel, named 5Cr5Mo2, was designed to obtain superior thermal stability. The proposed alloy is evaluated in terms of its hardness, microstructure, and tempering kinetics. Compared with the commonly used H13 steel, the softening resistance of the designed steel is superior. Based on SEM and transmission electron microscopy (TEM) observations, a higher abundance of fine molybdenum carbides precipitate in 5Cr5Mo2 steel. Strikingly, the coarseness rate of the carbides is also relatively low during the tempering treatment. Moreover, owing to their pinning effect on dislocation slip, the dislocation density of the 5Cr5Mo2 steel decreases more slowly than that of the H13 steel. Furthermore, a mathematical softening model was successfully deduced and verified by analyzing the tempering kinetics. This model can be used to predict the hardness evolution of the die steels during the service period at high temperature.https://www.mdpi.com/2073-4352/10/4/238hot-work die steelthermal stabilitycarbidedislocationtempering kinetics |
| spellingShingle | Ningyu Du Hongwei Liu Paixian Fu Hanghang Liu Chen Sun Yanfei Cao Dianzhong Li Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel Crystals hot-work die steel thermal stability carbide dislocation tempering kinetics |
| title | Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel |
| title_full | Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel |
| title_fullStr | Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel |
| title_full_unstemmed | Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel |
| title_short | Microstructural Stability and Softening Resistance of a Novel Hot-Work Die Steel |
| title_sort | microstructural stability and softening resistance of a novel hot work die steel |
| topic | hot-work die steel thermal stability carbide dislocation tempering kinetics |
| url | https://www.mdpi.com/2073-4352/10/4/238 |
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