纯钼骨架熔渗Mo-Cu合金工艺研究

研究了利用纯钼骨架熔渗法制备Mo70Cu30、Mo60Cu40(质量分数)合金的相关工艺。结果表明:试验原料可选取经高温预处理及筛分后费氏粒度为5.2μm,粒度分布范围较窄及C、O含量低的纯钼粉,不添加诱导Cu粉。利用限位法压制成型的钼素坯经H2气氛在1200～1300℃预烧结出孔隙率ε(%)为33.5%、45.2%的纯钼骨架,在H2气氛熔融态Cu中经1 200～1 350℃熔渗60～120 min可制得Cu含量为31.3%、40.7%的Mo70Cu30、Mo60Cu40合金。利用纯钼骨架熔渗法制备的Mo-Cu合金相对密度可达到98%以上,微观形貌可见Mo、Cu两相均匀分布。

The Mo-Cu Fabrication Process by Pure Molybdenum Skeleton Infiltration

This paper studies the process of Mo70Cu30 and Mo60Cu40 （weight percent） alloy fabrications by pure molybdenum skeleton infiltration. Raw materials are pure molybdenum powders pre-sintered at high temperature and screened. The molybdenum powder＇s particle size is 5μ m with narrow scope particle size distribution and low carbon and oxygen element content without adding inducing copper powder. The pure molybdenum skeleton with porosity between 33.5 % and 45.2 % can be fabricated by limited-dimension pressing method and pre-sintering at the temperature of 1 200-1 300 ~C in hydrogen atmosphere. The 31.3 % and 40.7 %Cu （weight percent）Mo70Cu30 and Mo60Cu40 alloy can be fabricated by infiltrating for 60-120min in liquation copper at the temperature range of 1 200-1 350℃ in hydrogen atmosphere. The relative density of the Mo-Cu alloy fabricated by pure molybdenum skeleton infiltration amounted to 98 %. The Mo and Cu phases were well-distributed from micro observation.