(中南工業(yè)大學(xué)粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室， 長(zhǎng)沙 410083)
摘 要: 含鎢量較高的W-Ni-Fe高比重合金具有高的密度、強(qiáng)度等優(yōu)異性能，適合用作動(dòng)能穿甲彈以及防輻射屏蔽材料； 而粉末注射成形技術(shù)(PIM)在生產(chǎn)小而形狀復(fù)雜與性能良好的零件方面具有很大的潛在優(yōu)勢(shì)。研究了95W-3.5Ni-1.5Fe高比重合金的注射成形工藝，討論了其燒結(jié)工藝與性能的關(guān)系，并與采用傳統(tǒng)粉末冶金(PIM)法制造的合金性能與顯微組織進(jìn)行了比較。結(jié)果表明，采用注射成形所生產(chǎn)的合金，性能更高，硬度分布和顯微組織結(jié)構(gòu)更均勻。
關(guān)鍵字: 注射成形 高比重合金 性能 顯微組織
（State Key Laboratory for Powder Metallurgy, Central South University of Technology, Changsha 410083, P. R. China）
Abstract:W-Ni-Fe heavy alloy with higher content of tungsten has a series of good properties, such as high density, high strength and so on. It is applicable to be used as penetrors, armor-piercing bullets, and radiation shielders. Powder injection molding (PIM) has a potential advantage in manufacturing small parts with complex shape. The injection process of 95W-3.5Ni-1.5Fe samples molding was investigated, and the sintering process and the dependence of properties on microstructures were discussed. Compared with traditional powder metallurgy (PM), the properies of this kind of alloy made by PIM is higher, the distribution of hardness and microstructure are uniform.
Key words: tungsten heavy alloy powder injection molding property microstucture
