锻压技术

大型钢锭铸锻一体化液芯锻造数值模拟及工艺实践

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

单位：1.兰州兰石能源装备工程研究院有限公司甘肃兰州 730314 2.甘肃省高端铸锻件工程技术研究中心甘肃兰州 730314 3.中国科学院金属研究所沈阳材料科学国家研究中心辽宁沈阳 110016 4.兰州兰石铸锻有限责任公司甘肃兰州 730314

关键词：铸锻一体化钢锭液芯锻造 09MnNiD钢

分类号：TG319

出版年,卷(期):页码：2019,44(5):21-28

摘要：

为了提高大型锻件的生产效率、降低生产成本，利用THERCAST和FORGE软件包，以09MnNiD钢材料为对象，对倒锥度19 t钢锭的凝固、液芯锻造全过程进行计算机数值模拟，预测液芯率及相应时间节点。根据模拟结果制定了19 t级大型钢锭铸锻一体化液芯锻造生产工艺，并将制定的工艺应用于生产实践。实践结果表明，采用数值模拟仿真分析指导大型钢锭铸锻一体化，实现液芯锻造工艺的制定，达到传统锻件的技术水平，钢锭在模时间减少了90%以上，钢锭利用率提高了10%，吨钢平均可节约天然气300 m3以上。通过精细化的生产组织、精确控制液芯率、钢锭超高温热送及液芯锻造，实现了余热利用，减少加热火次，提高锻造效率，节能节材增效显著。

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.

基金项目：

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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