摘要
研究了钴铬钼合金关节与珠粒烧结时不同冷却制度对零件组织和性能的影响。即A组铸件按照原生产工艺经固溶处理后,进行1280℃高温真空烧结,炉冷;B组铸件直接进行1280℃高温真空烧结,随炉冷却至1200℃充入氩气快速冷却至室温;C组铸件于铸模中缓慢冷却后不进行热处理;D组铸件进行1200~1240℃固溶处理,油冷;彼此作为对照组。结果表明：B组钴铬钼合金关节铸件不经过固溶处理直接进行高温烧结,随后采用冲入氩气方式快速冷却至室温,其获得的产品显微组织中M23C6碳化物强化相呈细小质点状均匀分布于基体,满足了力学性能技术要求。该工艺具有降低关节生产成本,提高产品质量和生产效率的现实意义。
On the basis of moderately increasing sinter temperature to insure the bond strength between beads and joints,the microstructure and mechanical properties of casting Co-Cr-Mo alloy joints under different cooling regime were priority investigated.Group A of castings were vacuum sintered at 1280℃ and furnace cooled after original solution treatment.Group B was directly vacuum sintered at 1280℃and furnace cooled to 1200℃,finally cooling to room temperature with flowing Ar atmosphere.Group C slowly cooled in casting die without heat treating.Group D was solution treated between 1200-1240℃ and oil cooled.All above of them were as contrast samples with each others.The results showed that mechanical properties of the Group B casting Co-Cr-Mo joints met the technical requirement,after high-temperature vacuum sintering without solution treatment and fast argon gas cooling.Moreover,finer microstructure,smaller disperse carbide M23C6 were obtained by gas cooling.This trial and exploring process improved mechanical performance,increased pass percentage and excused from the solution treatment procedure,so it has actual significance of reducing cost and time as well as increasing product quality and productivity.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2011年第6期48-51,共4页
Journal of Materials Engineering
