拨叉热裂数值模拟与分析（英文）  

Numerical Simulation and Analysis of Hot Cracking in the Casting of Fork

作　　者：王明光[1] 蒲勇[1] 

机构地区：[1]重庆文理学院重庆市高校微纳米材料工程与技术重点实验室,重庆402160

出　　处：《稀有金属材料与工程》2017年第4期946-950,共5页Rare Metal Materials and Engineering

基　　金：Science and Technology Projects of Chongqing Education Commission(KJ1401123);Foundation and Frontier Research Program Projects of Chongqing(cstc2014jcyj A50033)

摘　　要：在采用熔模精密铸造生产拨叉的过程中,热裂是常见的铸造缺陷。为了充分分析热裂产生的原因,采用铸造仿真软件Procast对铸造过程进行模拟,对流场、温度场、应力场进行了模拟和分析,预测和分析热裂产生的位置,结果表明:拨叉铸造过程中,局部区域应力集中,在缩孔附近产生热裂纹。通过降低浇注温度,提高模壳预热温度,增大凸台过渡倒角,可以减小应力集中,从而避免热裂。In the investment casting of shifting fork, hot cracking is a common defect. In order to analyze the hot cracking in the investment casting, the ProCAST software was adopted, and the investment casting process was simulated, The filling field, temperature field and stress field were analyzed, and the cause of crack was predicted. Results show that as the local area receives larger tensile stress from around, the shrinkage cavity appears; as a result, hot cracking occurs. By decreasing the pouring temperature, increasing preheating temperature of the shell, or chamfer angle of the fork, the casting stress can be reduced, and thus the crack will be avoided.

关 键 词：拨叉 热裂 数值模拟 

分 类 号：TG245[金属学及工艺—铸造]