大尺寸燃气轮机叶片蜡模注射成型与尺寸精度控制  

Injection Molding and Dimensional Accuracy Control of Large Size Gas Turbine Blade Wax Pattern

作　　者：周乐尧 汪东红 刘淑梅[1] 帅三三 赵代银[4] 疏达 ZHOU Le-yao;WANG Dong-hong;LIU Shu-mei;SHUAI San-san;ZHAO Dai-ying;SHU Da(School of Materials Science and Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming,Shanghai 200240,China;School of Materials Science and Engineering,State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200444,China;State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment,Dongfang Electric Dongfang Turbine Co.,Ltd.,Deyang 618000,Sichuan,China)

机构地区：[1]上海工程技术大学材料科学与工程学院,上海201620 [2]上海交通大学材料科学与工程学院上海市先进高温材料及其精密成形重点实验室,上海200240 [3]上海大学材料科学与工程学院,省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [4]东方电气集团东方汽轮机有限公司清洁高效透平动力装备全国重点实验室,四川德阳618000

出　　处：《铸造》2023年第6期641-647,共7页Foundry

基　　金：国家科技重大专项(J2019-VI-0004-0117);国家重点研发计划(2020YFB1710100,2022YFB3706800);国家自然科学基金(51821001,52074183,52090042);浙江省重点研发计划(2020C01056,2021C01157,2022C01147);材料成形与模具技术国家重点实验室开放基金(P2021-006);长寿命高温材料国家重点实验室开放基金(DECSKL202109)。

摘　　要：应用蜡模注射成型数值模拟方法,分析了单晶涡轮叶片蜡模充填过程、体积收缩率与翘曲变形和熔接痕;建立了注蜡工艺参数与翘曲变形的响应面模型,并使用多岛遗传算法获得全局最优的工艺参数。工艺参数对翘曲变形的影响最大的是保压压力,其次是注射温度和保压时间,叶片蜡模的最优注蜡工艺参数为保压压力13.66 bar,注射温度69.96℃,保压时间155.73 s,经试验验证,叶片蜡模尺寸精度达到CT4级别。A numerical simulation method was used to analyze the filling process,volume shrinkage,warpage deformation and weld lines of the single crystal turbine blade wax pattern.A response surface methodology of the wax injection process parameters and warpage deformation was developed and a multi-island genetic algorithm was used to obtain the global optimum process parameters.The process parameters that had the greatest influence on deformation were holding pressure,followed by injection temperature and holding time.The optimum wax injection parameters for the blade wax pattern were holding pressure 13.66 bar,injection temperature 69.96℃and holding time 155.73 s.The dimensional accuracy of the wax pattern was verified to achieve CT4 level.

关 键 词：熔模铸造 涡轮叶片 蜡模 数值模拟 尺寸精度 

分 类 号：TG241[金属学及工艺—铸造]