CAJ | 학술논문

利用Gleeble-2000热模拟试验机对含Nb微合金钢进行了单道次压缩试验,实测了不同变形温度和变形速率下实验钢的变形抗力,分析了各变形参数对实验钢动态再结晶和变形抗力的影响.确定了实验钢的动态再结晶激活能为245.448 kJ/mol(峰态时)和166.994 kJ/mol(稳态时),并建立了实验钢高温变形抗力的数学模型.该模型具有良好的曲线拟合特性,用该模型计算的结果与实测值吻合较好,可以为计算力能参数提供理论依据.
이용Gleeble-2000열모의시험궤대함Nb미합금강진행료단도차압축시험,실측료불동변형온도화변형속솔하실험강적변형항력,분석료각변형삼수대실험강동태재결정화변형항력적영향.학정료실험강적동태재결정격활능위245.448 kJ/mol(봉태시)화166.994 kJ/mol(은태시),병건립료실험강고온변형항력적수학모형.해모형구유량호적곡선의합특성,용해모형계산적결과여실측치문합교호,가이위계산력능삼수제공이론의거.
The single-pass compression experiment was carried out on Gleeble-2000 thermal simulator for a steel micro-alloyed with Nb, the deformation resistance of the testing steel under different deformation temperature and deformation rates was measured, and the influences of different process parameters on the dynamic recrystallization and deformation resistance were analyzed. The activation energy of dynamic recrystallization in peak state and steady state is respectively determined as 245.448 kJ/mol and 166.994 kJ/mol, and the mathematical model of high temperature deformation resistance is established. The model has good curve-fiRing performance, the expected values close to the measured ones, which provides necessary theoretic basis for the calculation of force-energy parameters.