45钢低温区热变形行为研究

doi:10.13228/j.boyuan.issn0449-749X.20140001

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Abstract The effect of different deformation conditions on the deformation behavior of 45 carbon structural steel at low temperatures was studied using Gleeble-1500 thermal-simulation machine. Experimental results show that peak stress increased with the decreasing of deformation temperature and the increasing of strain rate; dynamical recovery occurred when strain rate [ε]≥0.01 s-1, and deformation temperature [t]＜500 ℃; dynamical recrystallization occurred when strain rate [ε]≤1 s-1, and deformation temperature [t]≥500 ℃. The flow stress models at work harding-dynamical recovery stage and dynamical recrystallization stage were both established based on the Sellars-Tegart equation. The parameters in these models were fitted according to the experimental results. The stress-stain curves of both dynamic recovery style and dynamic recrystallization style were successfully predicted. The straightening force at low temperature of 45 steel plates in the industrial trial was predicted, and the results matched well with the measured values.

Received: 02 January 2014 Published: 13 October 2014

PACS:

TG331

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	Articles by authors
	ZHOU Jia-Lin
	SHI Mi
	ZHANG Pei-Yi
	YANG Guang-Yu
	YU Ru
	DAI Yuan

Cite this article:

ZHOU Jia-Lin,SHI Mi,ZHANG Pei-Yi等. Research on Hot Deformation Behavior of 45 Steel in Low Temperature Region[J]. Iron and Steel, 2014, 49(10): 62-65.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749X.20140001 OR http://www.chinamet.cn/Jweb_gt/EN/Y2014/V49/I10/62

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