Performance of mixed ceramics and CBN tools during hard turning of martensitic stainless steel

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• 作者：Kehinde Sobiyi (1)
  Iakovos Sigalas (1)
  Guven Akdogan (2)
  Yunus Turan (3)
  
  1. School of Chemical and Metallurgical Engineering ; University of the Witwatersrand ; Private Bag 3 ; Wits ; Johannesburg ; 2050 ; South Africa
  2. Department of Process Engineering ; University of Stellenbosch ; Private Bag X1 ; Matieland ; Stellenbosch ; 7602 ; South Africa
  3. Castco Precision Castings ; P.O. Box 19133 ; Tygerberg ; 7505 ; South Africa
  
• 关键词：PcBN ; Mixed ceramics ; Hard turning ; Cutting tool
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：77
• 期：5-8
• 页码：861-871
• 全文大小：3,767 KB
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• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

This paper describes the wear behavior of a ceramic and a PcBN cutting tool during the turning of AISI 440B stainless steels at different machining conditions. Experimental results showed that the wear mechanism for ceramic cutting tool is predominantly abrasive wear and for cBN tools was adhesive wear and abrasive wear. The abrasive wear is as a result of hard carbide particles in the workpiece material resulting in grooves formed on the flank face. There was formation of transferred layer followed by plastic deformation on the rake face of PcBN tool when cutting at low speed and feed rate. Better surface finish (Ra) was recorded for ceramics but with deteriorating surface topography. The results also show that good dimensional accuracy can be achieved with cBN tools using CNC machine with high static and dimensional stiffness coupled with high-precision hard turning.