定向凝固大模组螺旋选晶器温度场演化和晶粒生长  

Temperature Field Evolution and Grain Growth of Large-module Spiral Crystal Selector during Directional Solidification

作　　者：张朝威[1] 孟祥斌 李金国[1] 刘雅咏 姚刚 黄瀚川 向位 刘纪德[1] 梁静静[1] 赵乃仁[1] 邹明科 王猛[1] 姜卫国 李强[2] Zhang Chaowei;Meng Xiangbin;Li Jinguo;Liu Yayong;Yao Gang;Huang Hanchuan;Xiang Wei;Liu Jide;Liang Jingjing;Zhao Nairen;Zou Mingke;Wang Meng;Jiang Weiguo;Li Qiang(Institute of Metal Research,Chinese Science Academy;Weifang University of Science and Technology;Weifang Key Laboratory of High-temperature Materials and Single Crystal Components Fabrication Tcchnology for Advanced Engine System;Guiyang AECC Power Precision Casting Co.,Ltd.)

机构地区：[1]中国科学院金属研究所 [2]潍坊科技学院 [3]潍坊市先进动力系统用热端材料及单晶部件制备技术重点实验室 [4]贵阳航发精密铸造有限公司

出　　处：《特种铸造及有色合金》2023年第1期7-11,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(U1508213,51771190,51601102,51871221);国家科技重大专项资助项目(J2019-Ⅵ-0023-0139,2017-Ⅵ-0003-0073);山东省自然科学基金资助项目(ZR2020ME110);德阳市开放式校市合作技术研发资助项目(2018CKJ001)。

摘　　要：针对高速凝固法(HRS法)定向凝固设备的现有问题,集成了中心加热系统和底部水冷散热系统,在原有HRS单晶炉基础上改进了加热冷却方式,设计了一种新型高效的大模组单晶叶片生长设备。通过商业建模软件UG和有限元模拟软件ProCAST,对新型单晶炉在定向凝固过程中,螺旋选晶器的温度场演化过程和晶粒生长行为进行了研究。结果表明,新设备显著提高了固液界面前沿的温度梯度及其稳定性,有效解决了单晶铸件生长过程中的阴影效应问题,减少了单晶叶片的铸造缺陷,提高了单晶品质和叶片合格率。Aiming at the existing weakness of high rate solidification(HRS) equipment, the central heating system and the bottom water cooling system were integrated, and the heating and cooling mode was modified based on original HRS furnace to design a new large-module high-efficiency single crystal blade growth equipment. The commercial modeling software UG and the finite element simulation software ProCAST were utilized to investigate the temperature field evolution and grain growth of the spiral crystal selector of the novel single crystal furnace during directional solidification process. The results indicate that the new equipment can significantly improve the temperature gradient and stability at the front of the solid-liquid interface, effectively solve the problem of shadow effect in the growth process of single crystal casting, and reduce the casting defects of blade, improving the quality of single crystal and the qualification rate of blade.

关 键 词：大模组 螺旋选晶器 温度场演化 晶粒生长 

分 类 号：TG302[金属学及工艺—金属压力加工] TP311[自动化与计算机技术—计算机软件与理论]