冷等静压法制备Mo-30Cu合金的组织与轧制性能  

Microstructure and rolling performance of Mo-30Cu alloy prepared by cold isostatic pressing

作　　者：李杰[1] 姜国圣[1] 张帅[1] 王志法[1] 

机构地区：[1]中南大学材料与科学工程学院,长沙410083

出　　处：《粉末冶金材料科学与工程》2016年第4期610-617,共8页Materials Science and Engineering of Powder Metallurgy

摘　　要：采用冷等静压法（cool isostatic pressing，CIP）制得大尺寸钼骨架，对骨架进行渗铜制备Mo-30Cu合金，并在350℃进行温轧，研究CIP压力及熔渗温度和熔渗时间对合金致密度的影响以及合金的轧制性能。结果表明：采用冷等静压法在120～180 MPa压力下可制备孔隙分布均匀，无分层等缺陷的钼骨架，熔渗后坯料的线收缩率随CIP压力增加而逐渐降低，最佳CIP压力为160 MPa；在一定范围内升高熔渗温度与延长保温时间均有助于提高合金致密度；冷等静压–溶渗法制备的高致密Mo-30Cu合金具有较好的温轧性能，有效提高了大尺寸试样的加工性能。CIP压力为160 MPa压制的骨架在1350℃渗铜6 h后相对密度达到99%以上，合金的温轧变形量可达到65%。Mo-30Cu composite material was prepared by infiltrating Cu into Mo-skeleton which was fabricated by cold isostatic pressing （CIP）, and then the Mo-30Cu composite was warm rolled at 350℃. The effects of pressing pressure, infiltration temperature and time on the properties of the sintered alloys were studied and determined by the measurement of sintering density as well as the characterization of microstructures. The results show that, the pores of the Mo-skeleton with large size prepared by CIP under 120？180 MPa pressure are distributed uniformly, and no delamination defect is found. The linear shrinkage rate of the blank after infiltration decreases with increasing CIP pressure, and the most appropriate CIP pressure is 160 MPa. With increasing the infiltration temperature and prolonging the holding time, the relative density of Mo-30Cu alloy increases. The high density Mo-30Cu alloy prepared by CIP-infiltration method has good warm rolling performance, which can effectively improve the deformability of large-sized sample. The maximum sintering density of Mo-30Cu alloys can reach the level of 99% relative density, and the bonding fracture of the rolling specimen is never occurred even the deformation amount of the rolling specimen goes up to 65%, when the Mo-skeleton prepared in 160 MPa and infiltrated Cu at 1350℃ for 6 hours.

关 键 词：Mo-Cu合金 冷等静压(CIP) 渗铜 致密化 轧制性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]