采用DEFORM-3D有限元软件平台,分析了GH4169圆棒在精锻过程中旋转角度和送进速度对外观形状、内部应力和中心等效应变的影响。计算结果表明,当送进速度为3.0 m·min~(-1)时,即使采用较小的旋转角度,产品的表面质量也较好;当送进速度增大到4.5 m·min~(-1)时,采用较小的旋转角度,产品表面出现较重的螺旋纹,随着旋转角度的增大,产品表面质量逐渐好转;当送进速度达到6.0 m·min~(-1)时,采用最大旋转角度锻造,表面仍然留下重度螺旋纹。在送进速度为3.0和4.5 m·min~(-1)时,随着旋转角度的增加,中心等效应变均呈现出先增加后减小的变化规律,而Y向拉应力则为先减少后增加。综合考虑精锻后锻件表面质量最优、中心等效应变最大和Y向拉应力值最小等情况,若铸锭内部质量较好,选择旋转角度为14.0(°)/次,送进速度为4.5 m·min~(-1),使锻造开裂倾向最低的同时节约锻造时间;若锻造质量稍差,选择旋转角度为14.5(°)/次,送进速度为3.0 m·min~(-1),以提高中心等效应变,从而达到消除或减轻缩孔、疏松等冶金缺陷的目的。 The DEFORM-3D finite element software platform was used to analyze the influence of the rotation angle and feed speed of GH4169 round bar on the appearance shape, internal stress and center-equivalent strain during the precision forging process. The calculated results show that the surface quality of the product is good even with a small rotation angle when the feed speed is 3.0 m · min -1. When the feeding speed is increased to 4.5 m · min -1, 1), the surface of the product shows a gradual improvement as the rotation angle increases with a smaller rotation angle. When the feeding speed reaches 6.0 m · min -1, Forged with the maximum rotation angle, the surface still leaves a heavy spiral pattern. At the feed rates of 3.0 and 4.5 m · min ~ (-1), with the increase of rotation angle, the central equivalent strain showed the first increase and then decrease, while the Y-direction tensile stress decreased firstly increase. Considering the surface quality of forging after forging the best, the center of the maximum equivalent strain and Y to minimize the tensile stress, etc. If the internal quality of the ingot is better, select the rotation angle of 14.0 (°) / times, the feed rate of 4.5 m · min ~ (-1), the forging cracking tendency is saved while the forging time is saved. If the forging quality is a bit weaker, the rotation angle is selected to be 14.5 (°) / time and the feed speed is 3.0 m · min -1 , In order to improve the center of equivalent strain, so as to eliminate or reduce shrinkage, porosity and other metallurgical defects.