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| Hot Ductility of DSS and Its Microstructure Observation During Hot Deformation |
| SONG Zhi-gang,ZHENG Wen-jie,FENG Han,WU Zhong-zhong,GUO Hai-sheng,YU Fei |
| Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract By selecting several typical duplex stainless steels (DSS), i��e��, 00Cr22Ni5Mo3N, 00Cr21Ni2Mn5N and 00Cr25Ni7Mo4N, as research materials, hot ductility characteristic of DSS was studied by thermal simulation method and microstructure evolution during hot compression was observed through TEM. The results show that the optimum hot ductility temperature range of DSS is 1050-1200 ��. 00Cr25Ni7Mo4N exhibits the worst hot ductility and 00Cr21Ni2Mn5N has similar hot ductility to 00Cr22Ni5Mo3N. During hot compression, the dynamic recovery of austenite occurs in DSS while the dynamic recovery and recrystallization of ferrite take place in 00Cr22Ni5Mo3N and 00Cr21Ni2Mn5N, but only the dynamic recovery of ferrite can be observed in 00Cr25Ni7Mo4N.
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Received: 11 May 2012
Published: 23 August 2013
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Corresponding Authors:
Song Zhigang
E-mail: songzhigang1970@126.com
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2013, Vol. 20 
