楔横轧成形GH4169合金的热力耦合数值模拟  

Thermomechanical coupled numerical simulation of GH4169 alloy for cross wedge rolling

作　　者：张宁[1] 王宝雨[1] 胡正寰[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《北京科技大学学报》2011年第11期1396-1401,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(50975023);国家科技重大专项(2009ZX04014-074);北京市自然科学基金资助项目(3082013)

摘　　要：采用有限元软件DEFORM--3D对GH4169合金的楔横轧成形进行了热力耦合数值模拟,得到了GH4169合金轧件的金属流动情况、温度场的分布规律以及轧件与轧辊间的轧制力和力矩,并与45#钢进行了对比分析.结果表明:在楔横轧成形中,GH4169合金轧件的轴向金属流动规律不同于45#钢,其外层金属的轴向流动大幅度滞后于心部;各力能参数都要大于45#钢,且最高为45#钢的2.15倍;变形温度始终高于45#钢,最高温升比45#钢多6.21%.Thermal-mechanical coupled numerical simulation of GH4169 alloy during cross wedge rolling（CWR） was carried out using the finite element software DEFORM-3D.The metal flowing and temperature distribution of rolled pieces,and the rolling force and torque between the rolled piece and the roller were obtained and comparatively analyzed with 45# steel.The results show that the axial metal flowing of GH4169 during CWR is different from that of 45# steel,and the axial metal flowing at the surface substantially lags behind that at the center.All the energetic parameters are much greater than 45# steel＇s,and the maximum value is 2.15 times that of 45# steel.Meantime the deformation temperature is always higher than 45# steel＇s,and the maximum temperature rise is 6.21% more than that of 45# steel.

关 键 词：高温合金 楔横轧 热力耦合分析 有限元法 

分 类 号：TG335.19[金属学及工艺—金属压力加工]