摘要
利用DEFORM-3D软件模拟了双金属复合管热挤压成形过程,分析了变形体内应力、应变的分布和大小及其与挤压温度、模具温度的对应关系.确定了最佳挤压温度在1150~1200℃;挤压前对模具进行预热有利于挤压过程的顺利进行;采用异温挤压时变形体内最大等效应力差减小,缩小了内外层金属的塑性流动差异,减小了压头、压尾的比例,有利于提高成材率.通过实际生产验证,模拟热挤压过程的计算结果与实测结果有较好的一致性.
The-extrusion process of dual-metal cla d pipe is numerically simulated with the DEFORM-3D finite element software.Also analyzed are the distribution and size of the stress and strain in the deformed body and their corresponding relationship with the extrusion temperature and the die temperature.Moreover the optimal extrusion is determined as 1150~1200℃.Pre-heating of the die before hot-extrusion is helpful for a smooth extrusion operation.Thanks to the hetero-temperature extrusion technique,the maximum equivalent stress difference in the deformed body is reduced,and the plastic flow difference between the inner layer and the outer layer of metal is reduced so as the extruded head and extruded end proportion is reduced,resulting in enhancement of the yield.Through the actual production verification,the calculated result of the simulated hot extrusion process are in good agreement with the measured result.
作者
刘建彬
张琦
王涛
LIU Jianbin;ZHANG Qi;WANG Tao(China Petroleum Technology and Development Corporation,Beijing 100028,China)
出处
《钢管》
CAS
2022年第4期16-21,共6页
Steel Pipe
作者简介
刘建彬(1977一),男,博士,高级工程师,主要从事双金属复合管的产品与技术开发,以及高端不锈钢与镍基合金的研究工作。
