Submicron and ultrafine grained hardmetals for microdrills and metal cutting inserts
Submicron and ultrafine grained hardmetals for microdrills and metal cutting inserts
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DOI：
10.1016/s0263-4368(01)00066-x
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发表时间：
2002-01-01
影响因子：
3.6
通讯作者：
Leitner, G
中科院分区：
文献类型：
--
作者：
Gille, G;Szesny, B;Leitner, G
尽管到目前为止，硬质合金钻头和铣刀等圆形工具在亚微米和超细硬质合金的应用中占主导地位，但印制电路板微型钻头的消费量在过去十年中增长最快。本文介绍了超细硬质合金的最新发展及其在印制电路板微钻和金属切割刀片上的应用。在优化工艺和硬度、热硬度、韧性、强度和耐磨性等性能的基础上，提出了新一代微型钻头。特别是，微钻的失效概率可以大大降低，钻进行程几乎翻了一番。通过使用复杂形状的金属切削刀片，将改善压制性能与适当的掺杂和优化工艺相结合，可以获得亚微米和超细硬质合金的新应用。除了这些应用实例外，本文还介绍了超细硬质合金的烧结和性能的基础研究，特别是球磨、掺杂和烧结对超细硬质合金性能的影响。本文还提出了一种新的超细WC牌号，当VC/Cr3C2混合掺杂1wt%时，WC截距为0.1um WC-10wt%，Co结构，硬度为HV30=2050。(C)2002爱思唯尔科学有限公司。保留所有权利。
Although round tools as carbide drills and mills are dominating by far the application of submicron and ultrafine hardmetals the consumption for PCB microdrills had the strongest growth rate over the last decade. This paper deals with the latest developments of ultrafine hardmetals and their application for PCB microdrills and metal cutting inserts. Based on optimized processing and properties such as hardness, hot hardness, toughness, strength and wear resistance a new generation of microdrills is presented. In particular the failure probability of the microdrills could be considerably reduced and the number of drilling strokes was nearly doubled.Combining improved pressing behaviour with proper doping and optimized processing new applications of submicron and ultrafine hardmetals could be obtained by using complex shaped metal cutting inserts. Apart from these application examples this paper gives some insight into fundamental investigations on sintering and properties of ultrafine hardmetals and shows in particular the influence of milling, doping and sintering on the properties of ultrafine hardmetals.This paper also presents a new ultrafine WC grade showing a 0.1 mum WC intercept of a sintered WC-10 wt%, Co structure and a hardness of HV30 = 2050 for a 1 wt% mixed VC/Cr3C2 doping. (C) 2002 Elsevier Science Ltd. All rights reserved.