Mo-Re合金粉末冷等静压成形规律  

Forming regularity of Mo-Re alloy powders by cold isostatic pressing

作　　者：何浩然 刘奇 薄新维 王小宇 姚志远 韩校宇 王于金 HE Haoran;LIU Qi;BO Xinwei;WANG Xiaoyu;YAO Zhiyuan;HAN Xiaoyu;Wang Yujin(Chongqing Material Research Institute Co.,Ltd.,Chongqing 400707,China;College of Materials Science and Engineering,Chongqing University,Chong Qing 400045,China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《粉末冶金技术》2025年第1期102-108,共7页Powder Metallurgy Technology

基　　金：重庆英才创新领军人才项目(CQYC20200301185);重庆市基础研究与前沿探索面上项目(cstc2019jcyj-msxmX0795);北碚区科技人才与自主创新专项(2022-12)。

摘　　要：研究了Mo-47.5%Re(质量分数)球磨混料合金粉与等离子球化合金粉的冷等静压成形,利用“黄培云双自然对数方程”拟合压制参数,并分析压制压力与压坯密度的关系。结果表明,在长径比较大的模具中进行冷等静压压制,球磨混料合金粉与等离子球化合金粉均表现为压坯轴向收缩率大于径向收缩率。等离子球化合金粉压制后,压坯完整,未开裂,压坯密度沿轴向变化较少,芯部密度略低于两端密度。球磨混料合金粉压制后,压坯呈竹节状断裂,压坯密度沿轴向存在较大变化,芯部密度显著低于两端密度。等离子球化合金粉硬化指数(m)略高于球磨混料合金粉,其压制模量(M)低于球磨混料合金粉,说明等离子球化合金粉硬化趋势更大,相较于球磨混料合金粉更易压制。The cold isostatic pressing of Mo-47.5%Re alloy powders(mass fraction)mixed by ball milling and plasma spheroidization was compared and analyzed.The compression parameters were fitted and the relationship between pressing pressure and billet density was analyzed by Huang Peiyun’s double logarithmic pressing theory.The results show that the axial shrinkage of the compacts mixed by both ball milling and plasma spheroidization is greater than that of the radial shrinkage after cold isostatic pressing in the mold with large length/diameter ratio.The billets pressed by plasma spheroidization alloy powders are complete and uncracked,the density changes less along the axial direction,and the core density is slightly lower than that at both ends.The billets pressed by ball milling alloy powders are broken like bamboo joint,the density varies greatly along the axial direction,and the core density is significantly lower than that at both ends.The harding exponent of plasma spheroidization alloy powders is slightly higher than that of ball milling alloy powders,while the pressing modulus(M)is lower than that of ball milling alloy powders,which means the hardening tendency of plasma spheroidization alloy powders is greater.

关 键 词：钼铼合金 球磨 等离子球化 冷等静压 

分 类 号：TF124[冶金工程—粉末冶金]