现在生产钨丝、钨坯多用方条,在硬模压制方条过程中,除在内部容易引起分层、密度不均、裂纹等缺陷外,尤其在旋锻开坯时,由于四角加工量大,变形不一,引起再结晶组织和内应力不匀,致使表面裂纹,一直延伸到最后,影响钨丝质量。为此,国外某些厂家,已采用六角或八角形钨条用来减 Now the production of tungsten wire, tungsten blank multi-purpose bar, in the process of pressing square bar, in addition to easily lead to stratification, uneven density, cracks and other defects, especially in the rotary billet billet, due to large processing four corners , Different deformation, causing recrystallization and internal stress uneven, resulting in surface cracks, has been extended to the end, affecting the quality of tungsten. To this end, some foreign manufacturers, hexagonal or octagonal tungsten rod has been used to reduce