热物性参数反求技术在消失模铸造球铁件中的应用  

Application of Reverse Thermophysical Parameters Technology in Lost Foam Casting Ductile Casting

作　　者：田桥[1] 田万刚 周建新[1] 左从军 沈旭[1] 殷亚军[1] 

机构地区：[1]华中科技大学材料科学与工程学院 [2]芜湖瑞鹄铸造厂

出　　处：《特种铸造及有色合金》2015年第3期288-291,共4页Special Casting & Nonferrous Alloys

基　　金：国家青年自然科学基金资助项目(51305149)

摘　　要：通过对消失模铸造阶梯件凝固过程的实时测温,获得铸件的凝固曲线。利用反求原理,基于华铸CAE,对球铁合金铸件进行正交模拟试验,得到铸件模拟降温曲线。选取铸件模拟温度曲线和实际测得的铸件测温曲线的相似度最高的模拟曲线,确定该合金的热物性参数。结果显示,在温度范围为800~1 300℃之间,反求之后的铸件温度曲线与实际温度曲线的相似度较高,误差小于5%。分别利用反求前、后的热物性参数去模拟铸件缺陷并且进行对比分析,反求之后的模拟结果更加符合实际情况,并且通过铸件切片试验得以验证。By measuring the temperature of a lost foam casting ductile ladder casting during the solidification process,the actual casting cooling curves were presented.Based on reverse principle,a series of orthogonal experiments were conducted to obtain the simulation cooling curves based on casting simulation software InteCast CAE.By the method of error analysis,comparing the casting cooling curves obtained by the orthogonal experiments to the ones from actual temperature measuring experiment,the most similar casting cooling curve was adopted to determine the thermophysical parameters of the alloy.Orthogonal simulation experiment results show that,at 800 ~1 300 ℃,casting temperature curves obtained by reverse technology are well agreement with the actual ones,and the error is less than 5%.Using the parameters obtained by orthogonal simulation experiment and previous ones to simulate the casting defects,respectively,the simulation results of the former are more in line with the actual situation,and it is verified through the casting slice experiment.

关 键 词：数值模拟 热物性参数 反求 消失模 球铁件 

分 类 号：TG249.6[金属学及工艺—铸造] TP311[自动化与计算机技术—计算机软件与理论]