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1. 发明公开

EP1205563A1 Surface decarburization of a drill bit having a refined primary cutting edge 失效
标题翻译：具有精磨主切削刃的钻头的表面脱碳
公开(公告)号：EP1205563A1
公开(公告)日：2002-05-15
申请号：EP01204918.5
申请日：1994-11-10
申请人： Rogers Tool Works, Inc.
发明人： Britzke, Robert W. , Fang, Zhigang , Eason, Jimmy
IPC分类号： C21D3/04 , C21D9/22 , C23C30/00 , B24B3/26 , B23B51/02
CPC分类号： B24D3/26 , B23B51/02 , B23B2228/10 , B23B2251/122 , B23B2251/125 , B23B2251/18 , B23B2251/426 , B24B3/26 , C21D3/04 , C21D9/22
摘要： The present invention provides a method of surface decarburizing a cemented carbide cutting tool. The tool is placed in a protective environment. The tool is heated to an elevated temperature of between 600-1100 degrees C while in the protective environment for a period of 15-120 minutes. In another aspect of the invention, a drill is provided having a drill body (13) which has a cutting tip, an axis of symmetry, and a plurality of flutes (15), wherein the flutes (15) have a rake surface (17) at the cutting tip. The cutting tip comprises a plurality of side blade between the flutes (15) and joined at a web. A plurality of flank surfaces (27) extend from an outer diameter of the cutting tip to the axis of symmetry and a plurality of primary cutting edges (20) are present at the intersection of the flank surfaces (27) with the rake surfaces (17). The primary cutting edges (20) include either an angular or radius surface (21) or a combination thereof extending from the flank surfaces (27) to the rake surfaces (17).
摘要翻译：本发明提供了一种使硬质合金切削工具表面脱碳的方法。该工具置于保护环境中。工具在保护环境中加热到600-1100摄氏度之间的高温，持续15-120分钟。在本发明的另一方面中，提供了一种钻具，其具有钻削主体（13），该钻削主体具有切削尖端，对称轴线和多个凹槽（15），其中凹槽（15）具有前倾表面）在切割尖端。切削刀片包括多个位于凹槽（15）之间并且在腹板处连接的侧刀片。多个侧面（27）从切削刃尖的外径延伸到对称轴线，并且多个主切削刃（20）存在于侧面（27）与前刀面（17）的相交处）。主切削刃（20）包括从侧面（27）延伸到前刀面（17）的角形或半径表面（21）或其组合。

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