ZL205A合金凝固过程本构模型及其在筒形件中的应用  

Constitutive Model of ZL205A Alloy During Solidification and Its Application in Cylindrical Component

作　　者：王明杰 张建兵 吴士平[1] 黄西西 戴贵鑫 张晓东[1] 慕岩 史玉童 Wang Mingjie;Zhang Jianbing;Wu Shiping;Huang Xixi;Dai Guixin;Zhang Xiaodong;Mu Yan;Shi Yutong(School of Materials Science and Engineering,Harbin Institute of Technology;Shoudu Space Machinery Company)

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [2]首都航天机械有限公司

出　　处：《特种铸造及有色合金》2021年第5期570-574,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52075123)。

摘　　要：ZL205A合金在凝固过程中极易产生热裂缺陷,由于其高温阶段本构模型的缺失,使铸件热裂的预测十分困难。借助ProCAST软件研究了适用于ZL205A合金的线弹性、弹塑性及粘弹塑性本构模型,在此基础上与热裂实际浇注试验进行对比分析,发现粘弹塑性本构模型更适合于ZL205A合金。将该模型应用于大型薄壁筒形件中,结果发现,应力主要集中在法兰与薄壁的交界处,当筋高由19 mm增加至48 mm时,能够有效地改善筒形件的变形情况。The hot cracking occur easily in ZL205 A alloy during solidification process.However,the lack of constitutive model in the high temperature makes it considerably difficult to predict hot cracking.The linear elastic,elasto-plastic and elasto-visco-plastic constitutive models which are suitable for the mushy alloy of ZL205 A was evaluated by the simulation of ProCAST software,which was compared with the actual pouring test of hot crack on this basis.The results indicate that the elasto-visco-plastic constitutive model is more suitable for the mushy alloy of ZL205 A,and the stress is mainly concentrated at the intersection of the flange and the thin-wall of large-sized thin-wall cylindrical component with the constitutive model.The deformation of cylindrical component is effectively improved when the height of tiepiece is increased from 19 mm to 48 mm.

关 键 词：ZL205A合金 粘弹塑性本构模型 薄壁筒形件 

分 类 号：TG213[金属学及工艺—铸造] TG245