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| Effect of Heat and Insulation Treatment on MnS Inclusion in Heavy Rail Steel |
| QI Jiang-hua,YANG Cheng-wei,ZHU Wang-jun,OU Tie,LIU Yang,JI Yu |
| （Research Institute of Wuhan Iron and Steel Group Co., Wuhan 430080, Hubei, China） |
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Abstract The influence of heat and insulation treatment on MnS inclusion was researched in U75V high rate heavy rail steel. The change process of MnS inclusions in casting slab and steel rail was in-situ observed by con-focal laser scanning microscope. The result shows the spheroidization of the MnS inclusions is found at heating temperature between 600 and 870℃ and MnS inclusions begin to dissolve the steel at about 1180℃. According to the results, another experiment of heat and insulation treatment was carried on in electrical resistance furnace. The result indicates that the size of MnS inclusions reduce very little and aspect ratio decreases after the insulation at 830℃, but after insulation at 1180℃ the number of large MnS inclusions reduce obviously and minor sized inclusions increase ,the inclusion number further reduces and the aspect ratio further decreases with the prolong of the time. The slender MnS can be controlled through heat and insulation treatment in rail steel.
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Received: 07 January 2013
Published: 25 November 2013
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| [1] |
HE Ya-yuan,LI Li-wei,YIN Yun-yang,DENG Zhao-jun. Evolution of microstructure and properties of thickness section of wearresistant steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(6): 512-518. |
| [2] |
SUN Li-gen, LEI Ming, ZHANG Xin, LIU Yun-song, ZHU Li-guang. In-situ research on microstructure refining effect of Mg treatment for shipbuilding steel at high temperature[J]. Iron and Steel, 2020, 55(5): 94-102. |
| [3] |
. Study on NbC Precipitate of Nb Microalloying Mid-carbon Steel[J]. , 2020, 45(3): 0-0. |
| [4] |
YANG Chen-xing1,2,WU Zhi-wei1,2,YANG Mao-sheng2,ZHAO Kun-yu1. Microstructure and mechanical properties of Ni-Cr bearing alloy in solution aging treatment[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(3): 242-252. |
| [5] |
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| [6] |
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2013, Vol. 48 
