17Cr2Ni2Mo齿轮用钢热变形动态再结晶行为

doi:10.13228/j.boyuan.issn0449749x.20190153

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Abstract The thermal simulation test was carried out on the steel of hot rolled 17Cr2Ni2Mo gears. The dynamic recrystallization behavior of the materials were studied at strain rate=0.01~10 s-1 and hot deformation temperature t=1 050～1 150 ℃，which can provide theoretical guidance for exploring thermoplastic deformation processes of materials. The results show that the flow stress appears as a dynamic recovery or a continuous dynamic recrystallization softening phenomenon after the peak value at a higher strain rate. The flow stress exhibits multiple peaks in the wave and multiple dynamic recrystallization softening occurs at lower strain rates. The dynamic recrystallization critical characteristic strain εc is determined by the work hardening rate with strain curve (θε)，and the εc/εp ratio is statistically between 0.629 and 0.854. It can be seen that εc becomes smaller as the temperature increases as the strain rate is constant. When the temperature is constant，εc becomes larger as the strain rate becomes larger. At the same time，the constitutive equation of flow stress is established，and the average relative error of data verification is 1.705%. Finally，a dynamic recrystallization kinetics model was established，which can provide a theoretical reference for the formulation of related thermal processing processes.

Key words： 17Cr2Ni2Mo steel flow stress dynamic recrystallization critical strain

Received: 11 April 2019 Published: 15 November 2019

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	Articles by authors
	YU Xinping
	PAN Guangyong
	QI Yongjie
	HUANG Qinghua
	PAN Qiaoyu

Cite this article:

YU Xinping,PAN Guangyong,QI Yongjie等. Dynamic recrystallization behavior of steel for 17Cr2Ni2Mo gears[J]. Iron and Steel, 2019, 54(11): 94-100.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449749x.20190153 OR http://www.chinamet.cn/Jweb_gt/EN/Y2019/V54/I11/94

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