2A12铝合金粉末热等静压成形的性能研究.pdfVIP

第 25卷 第5期 Vo1．25，No．5，p42·46 学兔兔 粉宋冶金工业 2015年 lO月 POWDER M[ETALLURGY INDUSTRY oct．20l5 DOh 10．13228~．boyuan．issn1006-6543 2A12铝合金粉末热等静压成形的性能研究 喻 思，郎利辉，王 刚，黄西娜，续秋玉 (北京航空航天大学机械工程及自动化学院，北京 100191) 摘 要：通过热等静压工艺，采用方形包套制备了2A12铝合金粉末试样，研究了包套的变形情况、2A12铝合 金粉末试样的力学性能和断口形貌。结果表明：2A12铝合金粉末试样的力学性能低于锻件，断裂方式为脆性 断裂；粉末表面的氧化物抑制了其扩散连接，从而粉末界面连接强度较低，试样从界面连接处断裂。 关键词：热等静压；2A12铝合金粉末；脆性断裂 文献标志码：A 文章编号：1006．6543．(2015)05—0042．05 Study Oil the properties of 2A12 aluminum alloy powder prepared by hot isostatie pressing YU Si，LANG Li—hui，WANG Gang，HUANG Xi-na，XU Qiu—yu (School ofMechanical Engineering and Automation，Beihang University,Beijing 100191，China) Abstract：111e 2A12 aluminum alloy powder specimens were prepared by hot isostatic pressing with a square can— ning．The deformation of canning．mechanical properties and fracture morphology of 2A12 aluminum alloy pow- der specimens were studied．Results show mat mechanical properties of the specimens are 1ower than those of forged samples，the fracture mechanism is brittle fracture；the surface oxides inhibit the diffusion bonding among the powder particles；and the bonding sUength in the powder interface is low,thus the samples are fractured from theinterface． Key words：hot isostatic pressing；2A12 aluminum alloy powder；brittle fracture 铝合金由于密度低、比强度高、成形性好、耐腐 压成形工艺得到了极大发展。与传统方法相比，粉 蚀、成本低等一系列优点，在航空、航天、船舶、武器 末热等静压具有如下优点 】：(1)制品晶粒细小，组 等领域有着广泛的应用前景和不可替代的地位，铝