论文部分内容阅读
研究了在无润滑条件下,压铸铝合金A lSi9Cu3的铁金属间化合物对高速钢刀具钻削磨损特性的影响。结果表明:当合金中铁的质量分数较低时(w(Fe)<0.6%),铁金属间化合物以细小的多边形形状铁相为主,刀具后刀面磨损机制主要为塑性变形磨损,磨损量较大;当0.6%0.8%时,汉字状和多边形状铁相明显增多,呈薄片晶状的β相A l5FeSi出现,磨粒磨损成为主要的磨损机制,磨损量变大。粘着磨损和磨粒磨损共存的磨损机制是钻削压铸铝合金刀具合理的磨损机制。
The effect of iron-iron intermetallic compound of die-casting aluminum alloy AlSi9Cu3 on the drilling wear characteristics of HSS tool was studied under non-lubrication conditions. The results show that when the mass fraction of iron in the alloy is low (w (Fe) <0.6%), the iron intermetallic compounds are mainly composed of fine polygonal iron phases. The flank wear mechanism of the tool is mainly plastic deformation and wear, When w (Fe)> 0.6%, the Chinese iron-like α phase appears, and the tool wear form changes from plastic deformation wear to adhesive wear and abrasive wear, and the wear amount decreases. When w 0.8%, the shape of Chinese characters and the polygonal shape of the iron phase increased significantly, was thin crystalline β-phase A15FeSi appear, abrasive wear as the main wear mechanism, the amount of wear becomes larger. The wear mechanism coexisting with adhesive wear and abrasive wear is a reasonable wear mechanism for drilling die-cast aluminum alloy cutting tools.