Transactions of Materials and Heat Treatment

Title：Numerical simulation and technology practice of castingforging integration liquid core forging for heavy ingot

Authors： Zhao Ziwen1 2 Cao Yanfei3 Qin Zhuo1 2 Sun Mingyue3 Liu Hongwei3 Li Dianzhong3 Wang Ya′an1 2 Wang Xuming1 2 Yang Desheng1 2 Song Daochun2 4

Unit： 1. Lanzhou LS Energy Equipment Engineering Institute Co. Ltd. Lanzhou 730314 China 2. Gansu Engineering Research Center for Highend Forging and Casting Lanzhou 730314 China 3. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China 4. Lanzhou LS Casting and Forging Co. Ltd. Lanzhou 730314 China

KeyWords： castingforging integration ingot liquid core forging 09MnNiD steel

ClassificationCode：TG319

year,vol(issue):pagenumber：2019,44(5):21-28

Abstract：

In order to improve the production efficiency of large forgings and reduce the production costs, the overall process including solidification and liquid core forging for a 19 t taper steel ingot was simulated by software THERCAST and FORGE for 09MnNiD steel, and the core rate and corresponding time nodes were predicted. Then, the manufacturing techniques for liquid core forging with largescale steel ingot weighted about 19 t were formulated based on simulation results, and the developed process was applied to the production practices. The practical results show that the integration of large ingot casting and forging is guided by the numerical simulation analysis to formulate the liquid core forging technology, and the technical level of traditional forgings is reached. Therefore, the mold time of ingot is reduced by more than 90%, the utilization rate of ingot is increased by 10%, and the average tonnage of steel saves more than 300 m3 of natural gas. Furthermore, the waste heat utilization is realized by the fine production organization, the accurate control of liquid core rate, the ultra high temperature heat transfer of ingot and the liquid core forging, and the heating time is reduced to improve the forging efficiency and increase the efficiency in the energy and material saving obviously.

Funds：

国家重点研发计划(2016YFB03004072）;国家自然科学基金资助项目(51701225,U1508215,51774265);甘肃省科技计划资助项目（2015GS05896）

作者简介：赵子文（1967-），男，硕士，高级工程师 Email：zgzhaoziwen@163.com 通讯作者：曹艳飞（1988-），男，博士，助理研究员 Email：〖WTBZ〗yfcaoios@imr.ac.cn[HJ]

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