摘要
针对常规热轧异型材设计复杂、生产周期长、设备投资大等问题,尝试了轧槽不变时,通过改变辊缝得到不同孔型的对称轧制工艺。建立了角形断面型材轧制过程的三维有限元模型,基于DEFORM软件模拟分析了不同条件下轧件的孔型充满度、温度分布和应变分布。结果表明,当坯料横截面尺寸为125 mm×37 mm并轧制4道次时,得到的最大长度约为127 mm,腿部最大厚度约为15 mm的角形断面TC4型材的孔型充满度良好,温度和等效应变分布合理。应用相同的参数进行了实验验证,得到的轧件组织与模拟结果相符,说明轧槽固定而改变辊缝的角形截面型材轧制工艺是可行的。
Aiming at problems of complex design, long production cycle and large equipment investment of the conventional hot rolling profile, at groove constant, symmetric rolling process with the different passes got by changing roll gap was tried. The three-dimensional finite element model in angle section profile rolling process was established. Groove filling degree, the temperature distribution and strain distribution of rolled pieces were analyzed based on DEFORM software. The results show that, when the billet cross section size is 125 mm×37 mm and rolling is 4 passes, the groove filling degree of TC4 angle section profile （the maximum length is about 127 mm and the maximum thickness of the leg is about 15 mm） is good, and the distributions of the temperature and equivalent strain are reasonable. The experimental verification was carded out by using the same parameters. The microstructure of rolled pieces is consistent with the simulation results, which illustrates that angle section profile rolling process of changing roll gap at groove constant is feasible.
出处
《热加工工艺》
CSCD
北大核心
2017年第21期129-133,共5页
Hot Working Technology
关键词
TC4钛合金
角形截面型材
轧制
孔型
有限元模拟
TC4 titanium alloy
angle section profile
rolling
groove
finite element simulation
