中文摘要：

利用Forge模拟软件对718高温合金在径向锻造过程中温度场、等效塑性应变场、最高温度变化和散热情况进行了研究。在第一道次，坯料升温集中在表面至距离心部1/2半径处；第二道次后心部成为温度最高部位，且心部温度较之前趋于均匀，心部温度最终比初始温度升高约45℃；坯料最高温度在径向锻造过程中先升高而后略微降低；在所有散热形式中，热辐射是坯料散热的主要方式；对等效塑性应变的模拟发现，坯料在第二道次锻造后已被锻透。现场取样观察与模拟结果对比显示，模拟结果具有可信性。

英文摘要：

The temperature field, the equivalent plastic strain field, the highest temperature and the cooling problem of INCONEL718 superalloy in radial forging were studied with Forge simulation software. In the first pass, temperature rising is focused on the surface to the half radial distance area. After the second pass, the billet core is the highest temperature area, and the tempera-ture becomes more uniform than before, even if 45℃ higher than the initial. The highest temperature of the billet during radial forging rises firstly and then falls slightly. Thermal radiation is the main cooling mode in all of the cooling methods. The simulation result of equivalent plastic strain indicates that the billet has been forged through after the second pass. At last, a comparison with sample observations shows that the simulation results are reliable.