(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；2. 山西陽(yáng)泉鋁業(yè)股份有限公司，陽(yáng)泉 045003)
摘 要: 采用化學(xué)成分分析、金相分析、掃描電鏡、力學(xué)性能測(cè)試、能譜分析及PoDFA雜質(zhì)分析等技術(shù)對(duì)國(guó)產(chǎn)6061鋁合金異型散熱型材和進(jìn)口同種優(yōu)質(zhì)6061鋁型材進(jìn)行對(duì)比分析。結(jié)果表明：國(guó)產(chǎn)型材的雜質(zhì)總含量為0.195 mm2/kg，明顯高于進(jìn)口型材的雜質(zhì)總含量(0.016 mm2/kg)，且其中存在較多的MgAl2O4尖晶石和MgO硬質(zhì)雜質(zhì)相，這些物相具有特殊的形態(tài)和較高的硬度，在加工過(guò)程中易劃傷模具表面而降低型材的表面質(zhì)量；國(guó)產(chǎn)6061鋁型材中Mg和Si元素的含量均高于進(jìn)口試樣的，但由于形成了較多大塊狀、硬而脆的Fe2Si2Al9相，導(dǎo)致國(guó)產(chǎn)型材的強(qiáng)度雖稍高于進(jìn)口型材的，但其伸長(zhǎng)率卻大幅度下降，也影響型材的表面質(zhì)量。
關(guān)鍵字: 6061散熱鋁型材；硬質(zhì)相；表面質(zhì)量
6061 special-shaped radiator aluminum profile
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Shanxi Yangquan Aluminium Industry Co., Ltd, Yangquan 045003, China）
Abstract:Contrastive analyses of two kinds of 6061 special-shaped radiator aluminum profiles produced at home and abroad were done by composition analyses, OM, SEM, mechanical tests, energy spectrum analyses and PoDFA inclusion analyses. The results show that the inclusion concentration of the domestic profile is 0.195 mm2/kg, which is obviously higher than that of the imported one (0.016 mm2/kg). There are more spinel MgAl2O4 and MgO inclusions with special shapes and high hardness in the domestic profile, which can scratch the surface of molds and worsen the surface quality of profiles. With higher contents of Mg and Si, the strength of the domestic profile is slightly higher than that of the imported one. However, due to the formation of massive, hard and brittle Fe2Si2Al9 phases, its elongation is much lower than that of the imported one, and its surface quality is also affected.
Key words: 6061 radiator aluminum profile; hard phases; surface quality
