一、前言 以粉末冶金方法生产出烧结锭并进行压力加工是生产钨、钼等难熔金属材料的重要方法之一。H·A·Kuhn等人对钢铁与铝合金烧结坯的锻造工艺、形变特征、锻件的机械性能与组织结构的关系进行了系统的研究。H.A.Gaigher利用扫描、透射电镜对铁粉烧结坯形变时内部组织变化的规律 I. Introduction One of the important methods for producing refractory metal materials such as tungsten and molybdenum is to produce sintered ingots by powder metallurgy and press working. HA Kuhn et al. Conducted a systematic study on the forging process, the deformation characteristics, the mechanical properties and the structure of the forged steel-aluminum alloy billet. H.A.Gaigher Scanning, transmission electron microscopy of iron powder sintered billet deformation of the internal changes in the law