40Cr/Q345B双金属环坯离心铸造数值模拟研究
Numerical Simulation Research on Centrifugal Casting of 40Cr/Q345B Bimetallic Ring Blank
连笑媛 1齐会萍 2贾燕龙 2贾璐3
作者信息
- 1. 山西航天清华装备有限责任公司,山西 长治 046012
- 2. 金属材料成形理论与技术山西省重点实验室,太原科技大学材料科学与工程学院,山西 太原 030024
- 3. 太原工学院,山西 太原 030024
- 折叠
摘要
离心铸造的双金属环坯是保证双金属环在热辗扩中稳定性和最终性能的关键.通过Flow-3D软件模拟研究浇点位置、铸模转速和外层初始温度等参数对40Cr/Q345B双金属环坯离心铸造过程以及界面结合的影响,并通过实验进行了验证.结果表明:浇注点位于中心位置,有助于加快布型速度,减少铸件两端温差,壁厚均匀化.可行范围内,增加转速有助于改善偏心现象.最佳工艺参数为外层浇注温度1560 ℃,浇口 L为0.4,铸模转速800 r/min,在外层金属温度冷却至1350℃时浇注温度为1580 ℃的内层金属.通过模拟和实验验证,得到了冶金结合良好、内外层金属质量合格的40Cr/Q345B双金属环坯,为后续热辗扩提供了符合要求的坯料.
Abstract
The centrifugally cast bimetallic ring blank is the key to ensure the stability and final performance of the bimetallic ring during hot rolling.In this paper,Flow-3D software is used to simulate the influence of parameters such as pouring point position,mold rotation speed and outer layer initial temperature on the centrifugal casting process of 40Cr/Q345B bimetallic ring billet and the interface bonding,and verified by experiments.The results show that the pouring point is located in the center,which helps to speed up the patterning speed,reduce the temperature difference between the two ends of the casting,and make the wall thickness uniform.Within the feasible range,increasing the rotational speed helps to improve the eccentricity.The optimal process parameters are the outer layer pouring temperature of 1560 ℃,the gate L of 0.4,the casting speed of 800 r/min,and the inner layer metal with the pouring temperature of 1580 ℃ when the outer layer gold temperature is cooled to 1350 ℃.Through simulation and experimental verification,a 40Cr/Q345B bimetallic ring blank with good metallurgical bonding and qualified inner and outer layers of metal is obtained,which can provide a blank that meets the requirements for subsequent hot rolling.
关键词
离心铸造/双金属环坯/数值模拟Key words
centrifugal casting/bimetallic ring blank/numerical simulation引用本文复制引用
基金项目
山西省回国留学人员科研项目(2021-140)
山西省基础研究计划(202203021222283)
出版年
2024
NETL
NSTL
万方数据