钒和铌-钒低碳微合金钢的静态再结晶行为

doi:10.13228/j.boyuan.issn0449-749x.20170478

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Abstract The recrystallization regularities of V and Nb-V microalloyed steels have been studied with the MMS-300 hot simulation tester. The softening ratio curves caused by recrystallization were drawn. The static recrystallization activation energies of tested steels were estimated and the models of static recrystallization dynamic were established. The influence of Nb on the static recrystallization behaviors of V microalloyed steel was investigated with the observation of precipitates in the microstructure. The results show that， The static recrystallization activation energy of Nb-V microalloyed steel is significantly higher than that of V microalloyed steel. Under the conditions of deformed at 800 to 950 ℃ and kept for more than 60 s，the strain-induced precipitation occurs in Nb-V microalloyed steel. The tiny carbonitride is dispersed and distributed on dislocation lines and grain boundary. It leads to platform can be observed on the softening ratio curves of Nb-V microalloyed steel. All above these can indicate that Nb can not only present the occurrence of static recrystallization，but also obstruct the continuance of softening behavior.

Received: 20 September 2017 Published: 09 April 2018

PACS:

TG111.7

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	ZHUANG-FEI Fei-Wang

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ZHUANG-FEI Fei-Wang. Static recrystallization behaviors in V and Nb-V microalloyed steels[J]. Iron and Steel, 2018, 53(4): 62-66.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20170478 OR http://www.chinamet.cn/Jweb_gt/EN/Y2018/V53/I4/62

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