文中介绍为了提高大锻件的内在质量及机械性能,提出一种新型的锻造开坯工艺,经过模拟试验,证实了由于钢锭形状的改变,造成三向压应力,显著提高锻坯的变形程度,使变形均匀,从而可消除镦粗时的表面及内部裂纹并增加铸态组织的破碎程度及焊合锻件中的各种缺陷。 In order to improve the inherent quality and mechanical properties of large forgings, a new forging billet process is proposed. Through simulation tests, the three-direction compressive stress is confirmed as a result of the change of the ingot shape, and the deformation degree of the forging billet is significantly increased. Uniform deformation, which can eliminate upsetting the surface and internal cracks and increase the degree of crushing the as-cast structure and welded forgings in various defects.