【摘要】：采用等離子球磨技術制得W-C-10Co-0.9VC-0.3Cr_3C_2納米復合粉體,并利用單向模壓成型法將其壓制成生坯,再經(jīng)低壓燒結一步法制備成硬質合金。研究表明,等離子球磨3h所獲得的復合粉體呈片層狀形貌,并且成分分布均勻。在1 380℃及1 400℃燒結時,由于等離子球磨的特殊作用,VC、Cr_3C_2對WC晶粒長大抑制作用突顯。1 380℃燒結制備的硬質合金,致密度為99.2%,WC平均晶粒尺寸為250nm,硬度和橫向斷裂強度分別為92.3HRA和2 443 MPa,具有最佳的WC晶粒尺寸與致密度配合,以及最佳的綜合力學性能。
[Abstract]:The W-C-10Co-0.9VC-0.3Cr_3C_2 nano-composite powder was prepared by plasma ball milling technology. It was compacted into green by unidirectional molding and then prepared into cemented carbide by one step method of low pressure sintering. The results show that the composite powders obtained by plasma ball milling for 3 h have lamellar morphology and uniform distribution of composition. When sintered at 1 380 鈩，

本文編號：2244929