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.
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.
参考文献
| [1] | 杜云慧;张励忠;邢书明 等.钩舌常见失效形式与机理[J].金属学报,2003,28(06):25-30. |
| [2] | 唐振英,唐林,赵增华,陈明达.铁路货车锻造钩舌成形工艺及数值模拟优化[J].锻压技术,2012(03):11-14. |
| [3] | 钱利锋,侯英玮.U75V钢流动应力的试验研究[J].锻压技术,2009(05):132-135. |
| [4] | 孙永伟,刘勇,田保红,冯江,张毅.30%Mo/Cu-Al2O3复合材料的热压缩变形行为[J].功能材料,2012(01):99-102,107. |
| [5] | 权国政,赵磊,王阳,石彧,周杰.基于流动应力曲线的AZ80镁合金动态再结晶动力学表征[J].功能材料,2011(06):1142-1146. |
| [6] | 胡赓祥;蔡珣;戎咏华.材料科学基础(第二版)[M].上海:上海交通大学出版社,2009 |
| [7] | 赵志业.金属塑性变形与轧制理论[M].北京:冶金工业出版社,1980 |
| [8] | 司家勇,韩鹏彪,张继.Ti-46.5Al-2.5V-1.0Cr-0.3Ni合金高温锻造本构模型研究[J].锻压技术,2009(05):121-125. |
| [9] | 汪福成.金属塑性变形阻力数学模型试验研究[J].钢铁研究,1989(03):26-30. |
| [10] | 采利柯夫AN;戴周渊.轧钢机的力参数计算理论[M].北京:中国工业出版社,1965:3. |
| [11] | 波卢欣NU;贡ΓЯ;加尔金AM.金属与合金的塑性变形抗力(手册)[M].北京:机械工业出版社,1984:1-46. |
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