短流程铸辗复合成形工艺利用环件铸坯直接辗扩成形,减少了加热次数,缩短了工艺流程。在成形工艺中环件铸坯的质量是保证辗扩成形的关键。基于此设计了法兰毛坯铸造工艺,并用Pro CAST软件对铸件凝固过程和微观组织进行了模拟。结果显示,不同浇注温度下铸件的缩松、缩孔缺陷留在浇注系统及冒口内。用CAFE模块对凝固组织进行了模拟,结果表明,降低浇注温度有利于晶粒细化。 The short process of casting and rolling composite forming process using ring casting directly roll forming, reducing the number of heating and shorten the process. In the forming process, the quality of ring billet is the key to ensure rolling forming. Based on this, the flange blank casting process was designed and the casting solidification process and microstructure were simulated with Pro CAST software. The results show that casting shrinkage at different casting temperatures, shrinkage defects remain in the casting system and riser. The solidified structure was simulated by CAFE module. The results show that reducing the pouring temperature is beneficial to grain refinement.