核电用大型饼类锻件排砧工艺的研究  

Research on parallel anvil process for heavy disk forgings used in nuclear power plant

作　　者：丁燕青[1] 高锦张[1] 王兴中 马武江 

机构地区：[1]东南大学材料科学与工程学院,江苏南京211189 [2]上海新闵重型锻造股份有限公司,江苏东台224200

出　　处：《锻压装备与制造技术》2016年第1期92-96,106,共6页China Metalforming Equipment & Manufacturing Technology

摘　　要：为了解决大型饼类锻件成形过程中因锻件变形不均匀引起的层状裂纹缺陷,通过DEFORM-3D有限元软件建立了排砧工艺的有限元模型,对传统下平台的排砧工艺进行了改进,提出了上下平砧的对称排砧工艺。模拟结果表明使用上下平砧且相邻道次错砧的对称排砧工艺方案能够较大提高锻件的应变均匀程度,减小裂纹倾向;在该工艺方案下采用15%压下率和400mm进砧量的工艺参数可在锻件心部获得稳定的压应力状态,同时具有较高的均匀变形率。通过产品试制和批量生产验证了该工艺方案的合理性。In order to solve the laminated crack in heavy disk forgings caused by inhomogeneous deformation, the traditional parallel anvil process was improved and the symmetrical parallel anvil process was proposed. The pro- cess was modeled and simulated by DEFORM-3D finite element software; simulation indicated the strain unifor- mity was significantly improved by symmetrical parallel anvil process with crossing configuration in adjacent pass; the forging parameters of 15% reduction ratio and 400mm feed value resulted in homogeneous deformation and compressive stress state in forging center. The process was verified by the trial and volume production.

关 键 词：大型饼类锻件 对称排砧工艺 数值模拟 

分 类 号：TG316[金属学及工艺—金属压力加工]