摘要
钢锭的加热是大锻件生产的一个重要环节,加热规范的制定长期以来只能依靠经验公式。随着有限元技术的发展,数值模拟技术越来越多地运用于生产实际。借助于有限元软件Deform-3D对八角形钢锭的加热过程进行数值模拟,获得了钢锭加热过程的温度场和应力场。结果表明:钢锭表面与心部温差将出现两次峰值;钢锭内部应力以心部轴向应力为最大,且在整个过程中会出现两次应力峰值。通过正交试验方法探讨了相变期保温温度、相变期保温时间、温度头等对加热总时间的影响规律,得到了最优的钢锭加热规范。
Ingot heating is an important process of large forgings production. The establishment of ingot heating specification could only depend on empirical formula for a long time. With the development of FEM technology, numerical simulation is increasingly applied to practical production. The heating process of octagonal ingot was simulated by using the finite element software Deform- 3 D, the temperature and stress fields during ingot heating were obtained. The result shows that two peak temperature difference between the surface and core of ingot exist during heating;the axial stress of the core is the biggest stress, and two peak stresses occur during heating. The effect of the processing parameters, such as the preservation temperature and time during phase transfor- mation, the temperature head on the total heating time was analyzed by orthogonal experimental method, the optimal ingot heating specification was established.
出处
《现代制造工程》
CSCD
北大核心
2012年第6期55-59,共5页
Modern Manufacturing Engineering
基金
广东省重大科技专项项目(2009A080304004)
广州市工业科技攻关计划项目(2008Z1-D221)
关键词
大型八角形钢锭
加热规范
数值模拟
温度场
应力场
large octagonal ingot
heating specification
numerical simulation
temperature field
stress field
