铸态W12Cr4V5Co5钢热变形行为研究

IF 1.7 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Ironmaking & Steelmaking Pub Date : 2022-12-12 DOI:10.1080/03019233.2022.2151768
Bo Zhao, Min Xia, C. Ge, Ming-Yu Wu
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引用次数: 0

摘要

通过等温压缩试验,研究了铸态W12Cr4V5Co5钢在1000 ~ 1150℃、应变速率0.01 ~ 10 s−1范围内的热加工响应。实验结果表明,热变形参数对流变应力和微观组织演化有影响。首先在小应变下发生加工硬化,然后发生软化,最后在加工硬化和软化之间达到近似的动态平衡。计算得到变形激活能为557.33 kJ mol−1,并建立了应变补偿本构方程,将流变应力描述为变形参数的函数。显微组织分析表明,随着应变速率的升高和变形温度的降低,平均晶粒尺寸减小。此外,通过Deform-3D软件进行热变形模拟,揭示了试样在热压缩过程中的不均匀变形。本研究可为铸态W12Cr4V5Co5钢的热加工提供指导。
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Research on hot deformation behaviour of as-cast W12Cr4V5Co5 steel
ABSTRACT Hot working response of as-cast W12Cr4V5Co5 steel was investigated by isothermal compression testing in the temperature range of 1000-1150°C and strain rate range of 0.01-10 s−1. Experimental results showed that the flow stress and microstructure evolution were susceptible to the hot deformation parameters. Work hardening first occurred at a small strain, followed by softening, and finally, an approximate dynamic equilibrium was achieved between work hardening and softening. The activation energy of deformation was calculated to be 557.33 kJ mol−1, and constitutive equations compensated with strain were proposed to describe the flow stress as a function of deformation parameters. Microstructure analysis indicated that the average grain size decreased with the increase in strain rate and the decrease in deformation temperature. Additionally, the simulation of hot deformation via Deform-3D software revealed the sample's inhomogeneous deformation during hot compression. This study may provide guidance for hot working of as-cast W12Cr4V5Co5 steel.
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来源期刊
Ironmaking & Steelmaking
Ironmaking & Steelmaking 工程技术-冶金工程
CiteScore
3.70
自引率
9.50%
发文量
125
审稿时长
2.9 months
期刊介绍: Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.
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