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首页> 外文会议>International Latin-American Conference on Powder Technology >Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts
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Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts

机译：PM阀座插入件PM材料的加工和力学表征

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This article shows some fabrication aspects related to the obtention of sintered valve seat insert. This insert was made of a mixture of high-speed steel powders and iron powders plus NbC. This is a new development aiming the substitution of Co alloys currently used for valve seat inserts. The physical properties, mechanical properties and machining behaviour are discussed. The machining characteristics in terms of tool wear, cutting forces and chips morphology of the insert was compared to available commercial insert. The machining results indicate that the material under development has potential for commercial application and shows good machining evidences, in terms of equivalent cutting forces for ceramic tool. In addition, the machining using hard metal tool was susceptible to hardness variation observed for the material under development. Therefore, the machining tests point out the necessity for a microstructure homogenisation of the obtained material.
机译：本文介绍了与烧结阀座插入件的基础相关的一些制造方面。该插入物由高速钢粉和铁粉加上NBC的混合物制成。这是一种新的发展，旨在替代目前用于阀座插入件的CO合金。讨论了物理性质，机械性能和加工行为。将插入物的工具磨损，切割力和芯片形态的加工特性与可用的商业插入相比。加工结果表明，在陶瓷工具的等效切割力方面，开发的材料具有潜力，并显示出良好的加工证据。此外，使用硬质金属工具的加工易于观察到在开发的材料中观察到的硬度变化。因此，加工试验指出所获得的材料的微观结构均匀化的必要性。

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