Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition
Studies of 4Cr5MoSiV1 die steel suggest that under appropriate conditions, additions of rare earth (RE) can enhance tensile property. This improvement is apparently due to the more uniform distribution of carbides and the enhancement of precipitation strengthening after RE additions. In this present...
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MDPI AG
2017-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/7/10/436 |
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| author | Hanghang Liu Paixian Fu Hongwei Liu Chen Sun Jinzhu Gao Dianzhong Li |
| author_facet | Hanghang Liu Paixian Fu Hongwei Liu Chen Sun Jinzhu Gao Dianzhong Li |
| author_sort | Hanghang Liu |
| collection | DOAJ |
| description | Studies of 4Cr5MoSiV1 die steel suggest that under appropriate conditions, additions of rare earth (RE) can enhance tensile property. This improvement is apparently due to the more uniform distribution of carbides and the enhancement of precipitation strengthening after RE additions. In this present work, the effect of the RE addition on the carbides evolution and tensile property of 4Cr5MoSiV1 steel with various RE contents (0, 0.018, 0.048 and 0.15 wt %) were systematically investigated. The two-dimensional detection techniques such as optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) were used to investigate the carbides evolution of as-cast, annealed and tempered with RE addition. The results indicated that the carbides in 4Cr5MoSiV1 steels were modified by adding the suitable amount of RE. The eutectic structure and coarse eutectic carbides were all refining and the morphology of the annealed carbides initiated change from strip shape to ellipsoidal shape compared with the unmodified test steel (0RE). In addition, the amount of the tempered M8C7 carbides increased initially and then decreased with the alteration of RE addition from 0.018 to 0.15 wt %. Notably, the tensile test indicated that the average value of ultimate tensile strength (UTS) and elongation rate of 0.048RE steel increased slightly to 1474 MPa and 15%, higher than the 1452 MPa and 12% for the unmodified test steel (0RE), respectively. Such an addition of RE (0.048 wt %) would have a significant effect on the carbides evolution of as-cast, annealed and tempered and resulting in the tensile property of 4Cr5MoSiV1 die steel. |
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| last_indexed | 2024-12-23T12:59:52Z |
| publishDate | 2017-10-01 |
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| spelling | doaj.art-3f1cc9970a0e4d05a8280a06e7ef638e2022-12-21T17:46:03ZengMDPI AGMetals2075-47012017-10-0171043610.3390/met7100436met7100436Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth AdditionHanghang Liu0Paixian Fu1Hongwei Liu2Chen Sun3Jinzhu Gao4Dianzhong Li5Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, ChinaStudies of 4Cr5MoSiV1 die steel suggest that under appropriate conditions, additions of rare earth (RE) can enhance tensile property. This improvement is apparently due to the more uniform distribution of carbides and the enhancement of precipitation strengthening after RE additions. In this present work, the effect of the RE addition on the carbides evolution and tensile property of 4Cr5MoSiV1 steel with various RE contents (0, 0.018, 0.048 and 0.15 wt %) were systematically investigated. The two-dimensional detection techniques such as optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) were used to investigate the carbides evolution of as-cast, annealed and tempered with RE addition. The results indicated that the carbides in 4Cr5MoSiV1 steels were modified by adding the suitable amount of RE. The eutectic structure and coarse eutectic carbides were all refining and the morphology of the annealed carbides initiated change from strip shape to ellipsoidal shape compared with the unmodified test steel (0RE). In addition, the amount of the tempered M8C7 carbides increased initially and then decreased with the alteration of RE addition from 0.018 to 0.15 wt %. Notably, the tensile test indicated that the average value of ultimate tensile strength (UTS) and elongation rate of 0.048RE steel increased slightly to 1474 MPa and 15%, higher than the 1452 MPa and 12% for the unmodified test steel (0RE), respectively. Such an addition of RE (0.048 wt %) would have a significant effect on the carbides evolution of as-cast, annealed and tempered and resulting in the tensile property of 4Cr5MoSiV1 die steel.https://www.mdpi.com/2075-4701/7/10/436rare earth4Cr5MoSiV1 die steelcarbides evolutiontensile strengthelongation rate |
| spellingShingle | Hanghang Liu Paixian Fu Hongwei Liu Chen Sun Jinzhu Gao Dianzhong Li Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition Metals rare earth 4Cr5MoSiV1 die steel carbides evolution tensile strength elongation rate |
| title | Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition |
| title_full | Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition |
| title_fullStr | Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition |
| title_full_unstemmed | Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition |
| title_short | Carbides Evolution and Tensile Property of 4Cr5MoSiV1 Die Steel with Rare Earth Addition |
| title_sort | carbides evolution and tensile property of 4cr5mosiv1 die steel with rare earth addition |
| topic | rare earth 4Cr5MoSiV1 die steel carbides evolution tensile strength elongation rate |
| url | https://www.mdpi.com/2075-4701/7/10/436 |
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