Composite cutting tip

Abstract

Abstract PURPOSE:To improve machining performance for the continuous and intermittent process of super hard steel by constituting a composite machining tip wherein a cutter is made of boron nitride group super high pressure sintered material and a support material is made of cermet such as tungsten carbide group sintered hard alloy. CONSTITUTION:A cutter of boron nitride group super high pressure sintered material is bonded to a support material of tungsten carbide group sintered hard alloy or cermet via a bonding layer of 0.1-100mum mean thickness consisting of a metal layer of 4a and 5a group metals in the periodic table and the double layer of a high fusion point compound made from 4a and 5a group metal nitride or carbide nitride, or the alternate multi-layer thereof in order to constitute a composite machining tip. In this case, the mean thickness of the bonded layer is limited to a range of 0.1-100mum. This is because desired effect cannot be maintained with the layer thickness less than 0.1mum and the thickness over 100mum causes a drop in the rigidity of the tip itself, leading to the easy plastic deformation thereof. By the application of the aforesaid constitution, the composite machining tip when used for the intermittent machining of super hard steel, becomes free from the break of the cutting edge and machining performance can be ensured for a long time.

Inventors

• 👤 Masami Kayukawa
• 👤 正実 粥川
• 👤 Kisho Miwa
• 👤 三輪　紀章
• 👤 Koichi Nakano
• 👤 中野　弘一
• 👤 Fumihiro Ueda
• 👤 植田　文洋
• 👤 Itsuro Tajima
• 👤 逸郎 田嶋

Bibliographic Details