超声振动影响低碳钢热压缩过程的分析和试验

doi:10.13228/j.boyuan.issn0449-749x.20180010

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Abstract In order to study the effect of ultrasonic vibration on the recrystallization of austenite in hot deformation of low carbon steel，constitutive equations of Q235 steel undertaken high temperature hot compression deformation were developed based on the results of experiments carried out on the Gleeble-1500，and the austenite grain size evolution models parameters were determined based on the metallographic observation of the original austenite grain boundary. FEM simulations of specimen compressed with and without ultrasonic vibration excitation were performed utilizing the VUMAT subroutine presented in Abaqus/Explicit solver to simulate deformed shape of the specimen and the average austenite grain evolution process. It was shown that the end of specimen excited by ultrasonic vibration toolset formed as an inverted umbrella shape，and the threshold deformation of austenite dynamic recrystallization was significantly decreased. Dynamic recrystallization of austenite occurs first at the end of the specimen contacted with the ultrasonic vibration toolset，and the minimum austenite grain size after deformation is about 20 μm. Experimental results show that the surface microstructure is nanocrystallized and the internal grain is much finer than that of the conventional compression.

Key words： ultrasonic vibration Q235 steel dynamic recrystallization finite element analysis

Received: 08 January 2018 Published: 26 October 2018

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	Articles by authors
	HE Qiang-Jiang
	ZHU Han
	GENG Chun-Li
	CI Mo-Li
	LIU Jian-Guo

Cite this article:

HE Qiang-Jiang,ZHU Han,GENG Chun-Li等. Simulation and test of ultrasonic vibration effect on low carbon steel hot compression[J]. Iron and Steel, 2018, 53(10): 61-66.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20180010 OR http://www.chinamet.cn/Jweb_gt/EN/Y2018/V53/I10/61

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