低压烧结温度对一步法制备超细晶WC-Co基硬质合金组织及性能的影响
发布时间：2018-09-16 21:53
【摘要】：采用等离子球磨技术制得W-C-10Co-0.9VC-0.3Cr_3C_2纳米复合粉体,并利用单向模压成型法将其压制成生坯,再经低压烧结一步法制备成硬质合金。研究表明,等离子球磨3h所获得的复合粉体呈片层状形貌,并且成分分布均匀。在1 380℃及1 400℃烧结时,由于等离子球磨的特殊作用,VC、Cr_3C_2对WC晶粒长大抑制作用突显。1 380℃烧结制备的硬质合金,致密度为99.2%,WC平均晶粒尺寸为250nm,硬度和横向断裂强度分别为92.3HRA和2 443 MPa,具有最佳的WC晶粒尺寸与致密度配合,以及最佳的综合力学性能。
[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，
本文编号：2244929
[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，
本文编号：2244929
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