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| SelfSuperplasticization of Spray Formed UltrahighCarbon Steel |
| LIN Yijian1,ZHANG Jingguo1,LI Xiaojun2,SHI Haisheng3,ZHOU Candong3 |
| 1. Shanghai Key Lab. of Functional Metallic Materials, Shanghai 200092, China; 2. School of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China;3. Advanced Technology Institute,Shanghai Baosteel Research Institute, Shanghai 201900, China |
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Abstract 1.25C2.8Si1.5Cr ultrahigh carbon steel (UHCS) with a carbidenetworkfree and fully fine pearlitic microstructure,prepared by spray forming technology, exhibits fairly good superplasticity with elongation up to 380% without any thermal and/or mechanical pretreatment.An elongation of 122% was reached when the strain rate was raised to 2×10-1s-1.It was found that the unique superplasticity is resulted from microstructure evolution during the deformation, from the pearlite to fineequiaxedgrained structure with the lamellar cementite turning into spheroidized particles. High strain rate could facilitate utrafine spheroidized structure. Based on the above result, a method combining sprayforming and hot rolling with highdeformation rate was developed to make UHCS superplastic more effectively. The method was proved to be effective for other highcarbon steels such as highspeed steels.
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Received: 01 January 1900
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| [1] |
ZHANG Hai-jun, DU Wen-hua, XIN Dong-mei. Effects of spray forming and powder metallurgy on microstructureand property of 2030 steels[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(4): 400-406. |
| [2] |
SU Chang-shui，WANG Xiao-dong，ZHOU Xun， XIAO Fu-ren. In-situo bservation of the surface oxidation behaviours of a highspeed steel roll[J]. PHYSICS EXAMINATION AND TESTING, 2019, 37(4): 1-5. |
| [3] |
ZHANG Zhang,CHANG Kai-hua,CHANG Li-zhong,CHEN Jia-shun,ZHENG Fu-zhou. Effect of Mg on carbides in M2 high speed tool steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(12): 1046-1052. |
| [4] |
HAO Yong-fei，CHENG Guo-guang，XIE You. Precipitation behavior of carbides in W4Mo3Cr4VSi high-speed steel[J]. Iron and Steel, 2018, 53(8): 73-82. |
| [5] |
XIAO Zhi- xia,,,LI Hai- peng,,,FENG Jian- hang,,,MI Yong- wang,NIE Yi- hong5,YIN Fu- xing,,. Microstructure homogeneity of high speed steel M2 ingot by electroslag remelting[J]. , 2018, 30(7): 529-535. |
| [6] |
ZHAO Hai- sheng,LIU Zheng,ZHANG Wei,ZHOU Liu- yong,SHEN Jun- bo. Effects of alternating magnetic field on hardness of W6Mo5Cr4V2 high- speed steel cutting tool[J]. , 2018, 30(5): 368-372. |
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2007, Vol. 42 
