Characterization of hot deformation behavior of wear-resistant steel BTWl using processing maps and constitutive equations
Characterization of hot deformation behavior of wear-resistant steel BTWl using processing maps and constitutive equations作者机构：College of Mechanical Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China Heavy Machinery Engineering Research Center of the Ministry Education Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2018年第25卷第10期
页 面：1054-1061页
核心收录：
学科分类：07[理学] 08[工学] 0806[工学-冶金工程] 070503[理学-地图学与地理信息系统] 0705[理学-地理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
主 题：Wear-resistant steel BTW 1 Processing map Constitutive equation Hot deformation Dynamicrecrystallization
摘 要：In order to predict flow instability of wear-resistant steel BTW1, the hot compressions of wear-resistant steel BTW1 were firstly performed at the temperature of 900-1150 ℃ and at the strain rate of 0.05-15 s-1. Then, the constitutive relation was established based on Arrhenius-type hyperbolic sine equation. The results demonstrated that the flow stress depended on the deformation temperature and strain rate. When the deformation temperature kept constant, the flow stress increased as the strain rate increased. When the strain rate remained constant, the flow stress decreased as the temperature increased. The flow stresses calculated by constitutive equations were in a good agreement with experimental results. The apparent activation energy for deformation in the above processing region was estimated to be 369 kJ tool-1. A processing map could be obtained by the superimposition of an instability map on a power dissipation map. Based on the analysis of processing map and the microstructures, the theological instability regimes of strain rate and temperature for hot deformation of wear-resistant steel BTWl had been identified.
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