核电大型管板锻件两种压实工艺的数值模拟与研究  

Numerical Simulation and Research of Two Kinds of Compacting Process for Nuclear Power Large Tube-sheet Forgings

作　　者：张绍军[1] 梁书华[1] 刘钊[1] 

机构地区：[1]苏州热工研究院有限公司电站设备监理工程技术研究中心,江苏苏州215004

出　　处：《热加工工艺》2013年第13期102-105,共4页Hot Working Technology

摘　　要：中心凸台压实工艺和锥形板镦粗工艺是常用的两种大型饼类锻件镦粗方式。利用Forge锻造模拟软件模拟了两种工艺镦粗的核电管板锻件。结果表明:采用中心凸台压实工艺的坯料心部在镦粗过程中一直存在三向压应力,且心部产生了变形,但上下端面仍存在难变形区;采用锥形板镦粗工艺的坯料心部在镦粗过程中一直存在两向拉应力,虽迫使与锥板接触部位的坯料产生了变形,消除了难变形区,但心部并没有产生有效变形。A center bulge compacting process and conical plate upsetting process are frequently-used two upsetting methods of a large cake forging. Two processes of upsetting nuclear power tube-sheet forging were simulated by Forge simulation sottware. The results show that： 3-direction compressive stress always exists in the core of the billet during the center bulge compaction process, and the deformation is produced in the central of the billet, but stagnant zone still exists near the upper and bottom end surface of billet; 2-direction tensile stress always exists in the core of the billet during the conical plate upsetting process, and it will force the billet of contact with conical plate to deform, so stagnant zone is eliminated, but the effective deformation is not produced in the central of the billet.

关 键 词：管板锻件 镦粗工艺 数值模拟 应力应变分析 

分 类 号：TG316.2[金属学及工艺—金属压力加工]