CAJ | 학술논문

采用 Gleeble-1500热模拟试验机对25 MnCrNiMoA钢的流动应力行为进行等温压缩研究,在应变`量为0．6,变形温度为700~1200℃,变形速率为0．1,1和10 s-1下的等温压缩实验.根据实测数据与应力-应变曲线,分析流动应力与变形量、变形温度以及变形速率之间的关系,建立了该种材料在高温状态下金属流动的力学模型.对该力学模型进行非线性回归,求出相关系数,通过分析模型的残差,说明该模型拟合特性良好.
채용 Gleeble-1500열모의시험궤대25 MnCrNiMoA강적류동응역행위진행등온압축연구,재응변`량위0．6,변형온도위700~1200℃,변형속솔위0．1,1화10 s-1하적등온압축실험.근거실측수거여응력-응변곡선,분석류동응력여변형량、변형온도이급변형속솔지간적관계,건립료해충재료재고온상태하금속류동적역학모형.대해역학모형진행비선성회귀,구출상관계수,통과분석모형적잔차,설명해모형의합특성량호.
The flow stress behavior of 25MnCrNiMoA steel was studied by isothermal compression test at Gleeble-1500 thermal-mechnical simulator.The test condition were at degree of deformation for 0.6,tempera-ture of deformation for 700-1 200 ℃ and rate of deformation for 0.1,1,10 s-1 .Based on the experiment data and stress-strain curve,analysis the relationship of the flow stress between degree of deformation,temperature of deformation and rate of deformation.Under this relationship,a mechanical model of the material which metal flowed in hot temperature was established.Then nonlinear regression the mechanics model and correlation the coefficient.Through the analysis model of residuals,to explain the model fitting characteristics was well.