Mo70Cu30合金烧结棒坯热旋锻变形研究  

Research on Hot-swage Deformation of Mo70Cu30 Alloy Sintered Bar

作　　者：李卿[1] 李增德[1] 林晨光[1] 崔舜[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《粉末冶金技术》2015年第5期355-358,共4页Powder Metallurgy Technology

摘　　要：为了提高钼铜合金的性能,研究了Mo70Cu30合金烧结棒坯在700～850℃温度下,以1.2～1.6 m/min速度热旋锻变形的特点。结果表明：在变形量小于60%时,随着变形量增大,棒材相对密度和组织均匀性有所提高,组织中铜相富集区和孔洞逐渐消失,材料硬度与电导率升高。当变形量大于60%时,棒材组织中铜相出现烧损现象,而且材料硬度与电导率呈现下降趋势。随着变形量继续增大,心部组织出现裂纹,棒材发生劈裂。In order to improve the performance of the molybdenum-copper alloy, hot-swage deformation characteristics of Mo70Cu30 alloy sintered bars were studied in a temperature range of 700 - 850 ℃ , with deformation speed of 1.2 - 1.6 m/rain. When the deformation amount is less than 60% , the results show that with deformation increases, relative density and uniformity of bars are enhanced, hardness and electrical conductivity of the material increase due to the gradual disappearing of copper phase-rich regions and holes in bars . When the deformation is more than 60% , material＇s hardness and electrical conductivity decline due to the burning loss of copper phase. As deformation continues to increase, the core structure appears cracks which cause the bars splitting.

关 键 词：Mo70Cu30合金 热旋锻 相对密度 均匀性 硬度 电导率 

分 类 号：TF125.241[冶金工程—粉末冶金]