一种新型高淬透性Ni-Cr-Mo-B钢的热变形本构分析

doi:10.11896/cldb.201904025

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Abstract Hot deformation behavior of a novel Ni-Cr-Mo-B ultra-heavy plate steel with high hardenability at 850-1 150 ℃ and the strain rates of 0.01 to 10 s^-1 was studied by means of single pass Gleeble hot compression tests, optical microscopy and regression method. The results revealed that the rheological stress of Ni-Cr-Mo-B steel decreased with the increasing deformation temperature and increased with the rising strain rate du-ring hot compression. The classic strain-compensation Arrhenius-type constitutive equation established in this study could roughly predict the rheological behavior of Ni-Cr-Mo-B steel. Furthermore, a revised strain-compensation Arrhenius-type constitutive equation was proposed by taking the influence of strain rate and deformation heat on the deformation process into consideration. The statistical parameters of the revised equation were as follow, R_c=0.994 68, AARE=3.69%, RMSE=6.44 MPa, NMBE=1.25%, -10%≤δ≤10%, which means that the revised equation could predict the rheological stress more accurately.

Key words： Ni-Cr-Mo-B steel ultra-heavy plate hot deformation constitutive equation

Published: 11 March 2019

CLC number:

TG142.3

Fund:This work was financially supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2011BAE25B01), the Doctoral Scientific Research Foundation of Liaoning Province (20170520151), the Undergraduate Training Programs for Innovation and Entrepreneurship of Province Level (201710147000084).

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	Articles by authors
	GAO Zhiyu
	SHENG Kai
	KANG Yu
	ZHANG Xu
	PAN Tao

Cite this article:

GAO Zhiyu,SHENG Kai,KANG Yu, et al. Hot Deformation Constitutive Analysis of a Novel Ni-Cr-Mo-B Steel with High Hardenability[J]. Materials Reports, 2019, 33(4): 694-698.

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http://www.mater-rep.com/EN/10.11896/cldb.201904025 OR http://www.mater-rep.com/EN/Y2019/V33/I4/694

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