The performance of ceramic and cermet cutting tools for the machining of austempered ductile iron
The performance of ceramic and cermet cutting tools for the machining of austempered ductile iron
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DOI：
10.1007/s00170-008-1528-z
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
K. Aslantaş;İrfan Ucun
中科院分区：
文献类型：
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作者：
K. Aslantaş;İrfan Ucun
在这项研究中，奥贝球铁（ADI）具有铁素体组织的切削加工性进行了研究。为此，使用了三种类型的球墨铸铁材料（铸态，ADI-250，ADI-375）和两种不同类型的切削刀具材料（陶瓷和金属陶瓷）。为了强调等温淬火工艺的作用，球墨铸铁（DI）试样首先在900°C的盐浴中进行120分钟的淬火，然后在250°C（ADI-250）和375°C（ADI-375）的盐浴中进行120分钟的淬火。在恒定的切削深度和进给速度下，以不同的切削速度（100-500 m/min）进行加工试验。陶瓷和金属陶瓷刀具的性能进行了评价的基础上工件的表面粗糙度和后刀面磨损。用扫描电镜对刀具的磨损情况进行了表征。结果表明，较低的等温淬火温度可提高切削力，同时获得较好的表面粗糙度。此外，结果表明，刀具磨损主要发生在后刀面。然而，较高的切削速度会导致金属陶瓷刀具产生切屑。
In this study, the machinability of austempered ductile iron (ADI) having a ferritic structure was examined. For this purpose, three types of ductile iron materials (as cast, ADI-250, ADI-375) and two different types of cutting tool materials (ceramics and cermet) were used. To emphasize the role of austempering process, ductile iron (DI) specimens are first austenitized in salt bath at 900°C for 120 minutes after which they are quenched in salt bath at 250°C (ADI-250) and 375°C (ADI-375) for 120 min. Machining tests were carried out at various cutting speeds (100–500 m/min) under the constant depth of cut and feed rate. The performance of both ceramic and cermet tools were evaluated based on the workpiece surface roughness and flank wear. Wear conditions of the cutting tools were characterized by scanning electron microscope. The results point out that the lower austempering temperature results in increasing of the cutting forces, while better surface roughness is obtained. Additionally, the results indicate that the tool wear occurs mainly on the flank face. However, higher cutting speed results in chipping formation in cermet cutting tool.