Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel
Previous studies have indicated that the preformed martensite has a significant effect on the subsequent bainite transformation of nanobainite bearing steel, but its effects on the microstructure and mechanical properties are still unclear. In this paper, the effects of preformed martensite and its...
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MDPI AG
2023-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/1/99 |
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| author | Decheng Jia Dongyun Sun Qingchao Wang Feng Liu Yanguo Li Sujuan Yuan Zhinan Yang Fucheng Zhang |
| author_facet | Decheng Jia Dongyun Sun Qingchao Wang Feng Liu Yanguo Li Sujuan Yuan Zhinan Yang Fucheng Zhang |
| author_sort | Decheng Jia |
| collection | DOAJ |
| description | Previous studies have indicated that the preformed martensite has a significant effect on the subsequent bainite transformation of nanobainite bearing steel, but its effects on the microstructure and mechanical properties are still unclear. In this paper, the effects of preformed martensite and its volume fraction on microstructure and mechanical properties of nanobainite bearing steel were investigated by using scanning electron microscope, transmission electron microscope, X-ray diffractometer and wear resistance experiments. It was demonstrated that the introduction of preformed martensite can refine bainitic microstructure and increase the volume fraction of retained austenite, but reduces the mechanical stability of retained austenite. When the volume fraction of preformed martensite is less than 20%, the hardness and wear resistance of nanobainite bearing steel gradually increases with the increase in the volume fraction of preformed martensite, but the toughness of steel decreases gradually. When the volume fraction of preformed martensite reaches 25%, the properties of nanobainite bearing steel, especially the wear resistance, obviously deteriorate. The optimized volume fraction of preformed martensite is ~10%–15% by comprehensive comparison the mechanical properties of nanobainite bearing steel. |
| first_indexed | 2024-03-09T11:42:21Z |
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| id | doaj.art-4114c497761f4be4a4dc0c0256f65adf |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T11:42:21Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-4114c497761f4be4a4dc0c0256f65adf2023-11-30T23:30:43ZengMDPI AGMetals2075-47012023-01-011319910.3390/met13010099Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing SteelDecheng Jia0Dongyun Sun1Qingchao Wang2Feng Liu3Yanguo Li4Sujuan Yuan5Zhinan Yang6Fucheng Zhang7National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaNational Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, ChinaNational Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaNational Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, ChinaPrevious studies have indicated that the preformed martensite has a significant effect on the subsequent bainite transformation of nanobainite bearing steel, but its effects on the microstructure and mechanical properties are still unclear. In this paper, the effects of preformed martensite and its volume fraction on microstructure and mechanical properties of nanobainite bearing steel were investigated by using scanning electron microscope, transmission electron microscope, X-ray diffractometer and wear resistance experiments. It was demonstrated that the introduction of preformed martensite can refine bainitic microstructure and increase the volume fraction of retained austenite, but reduces the mechanical stability of retained austenite. When the volume fraction of preformed martensite is less than 20%, the hardness and wear resistance of nanobainite bearing steel gradually increases with the increase in the volume fraction of preformed martensite, but the toughness of steel decreases gradually. When the volume fraction of preformed martensite reaches 25%, the properties of nanobainite bearing steel, especially the wear resistance, obviously deteriorate. The optimized volume fraction of preformed martensite is ~10%–15% by comprehensive comparison the mechanical properties of nanobainite bearing steel.https://www.mdpi.com/2075-4701/13/1/99nanobainite steelbearing steelmartensitemicrostructuremechanical property |
| spellingShingle | Decheng Jia Dongyun Sun Qingchao Wang Feng Liu Yanguo Li Sujuan Yuan Zhinan Yang Fucheng Zhang Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel Metals nanobainite steel bearing steel martensite microstructure mechanical property |
| title | Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel |
| title_full | Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel |
| title_fullStr | Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel |
| title_full_unstemmed | Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel |
| title_short | Effects of Preformed Martensite on Microstructure and Mechanical Properties of Nanobainite Bearing Steel |
| title_sort | effects of preformed martensite on microstructure and mechanical properties of nanobainite bearing steel |
| topic | nanobainite steel bearing steel martensite microstructure mechanical property |
| url | https://www.mdpi.com/2075-4701/13/1/99 |
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