新聞資訊
硬質相對6061鋁合金異型散熱型材表面質量的影響
發布人：上海艾荔艾金屬材料有限公司m.jshcn.cn
更新時間：2015-12-05
采用化學成分分析、金相分析、掃描電鏡、力學性能測試、能譜分析及PoDFA雜質分析等技術對國產6061鋁合金異型散熱型材和進口同種優質6061鋁型材進行對比分析。
硬質相對6061鋁合金異型散熱型材表面質量的影響Effect of hard phases on surface quality of?6061 special-shaped radiator aluminum profile
采用化學成分分析、金相分析、掃描電鏡、力學性能測試、能譜分析及PoDFA雜質分析等技術對國產6061鋁合金異型散熱型材和進口同種優質6061鋁型材進行對比分析。結果表明：國產型材的雜質總含量為0.195 mm2/kg，明顯高于進口型材的雜質總含量(0.016 mm2/kg)，且其中存在較多的MgAl2O4尖晶石和MgO硬質雜質相，這些物相具有特殊的形態和較高的硬度，在加工過程中易劃傷模具表面而降低型材的表面質量；國產6061鋁型材中Mg和Si元素的含量均高于進口試樣的，但由于形成了較多大塊狀、硬而脆的Fe2Si2Al9相，導致國產型材的強度雖稍高于進口型材的，但其伸長率卻大幅度下降，也影響型材的表面質量。
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.
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