Tribology of tool-chip interface and tool wear mechanisms

被引:82
作者
Gekonde, HO [1 ]
Subramanian, SV [1 ]
机构
[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
tribology of tool-chip interfaced; seizure; tool wear mechanisms; dislocation pipe diffusion; phase transformation;
D O I
10.1016/S0257-8972(01)01488-8
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The tribological phenomenon at the tool-chip interface controls chip formation and tool wear. As metal cutting speed increases from low to moderate speeds, the tribological conditions at the tool-chip interface tend to change from sliding to seizure, giving rise progressively to partially segmented chips. Once seizure sets in, thermoplastic shear occurs in the secondary shear zone, raising the local temperature at the tool-chip contact. Thermally activated processes set in. Dissolution of the tool into the chip takes place by a diffusion mechanism, causing tool crater wear. The maximum depth of the crater is located at some distance away from the cutting edge of the tool. At higher cutting speeds chip segmentation is caused by thermoplastic shear localisation at the primary shear zone causing high temperature rise and rapid tool wear close to the cutting edge of the tool. The change in tribological phenomenon at the tool-chip interface as a function of cutting speed is discussed. Quantitative data are reported to show the onset of seizure in metal cutting and the consequences of seizure in promoting dissolution wear by diffusion mechanism. The calculated temperature distribution under seizure conditions is compared with measured crater depth profiles to show that crater wear is coupled with phase transformation. Under conditions of seizure, the role of coatings in suppressing dissolution wear is demonstrated in both ductile iron and low carbon steel using TiN and HfN, which are compounds having the least solubility in the workpiece (steel matrix). (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:151 / 160
页数:10
相关论文
共 26 条
[1]   NANOTRIBOLOGY - FRICTION, WEAR AND LUBRICATION AT THE ATOMIC-SCALE [J].
BHUSHAN, B ;
ISRAELACHVILI, JN ;
LANDMAN, U .
NATURE, 1995, 374 (6523) :607-616
[2]  
Bowden F. P., 1954, FRICTION LUBRICATION
[3]  
Buckley D.H., 1981, SURFACE EFFECTS ADHE
[4]  
CARTER CF, 1979, PRINCIPLES PHYSICAL, P250
[5]  
DOYLE ED, 1973, P ROY SOC LOND A MAT, V173, P336
[6]   Modelling the kinetics of strain induced precipitation in Nb microalloyed steels [J].
Dutta, B ;
Palmiere, EJ ;
Sellars, CM .
ACTA MATERIALIA, 2001, 49 (05) :785-794
[7]  
GEKONDE HO, 1998, THESIS MCMASTER U HA
[8]  
Gladman T., 1997, PHYS METALLURGY MICR, P206
[9]  
INGLE SS, 1993, THESIS MCMASTER U HA
[10]   TOOL WEAR BY SOLUTION - A QUANTITATIVE UNDERSTANDING [J].
KRAMER, BM ;
SUH, NP .
JOURNAL OF ENGINEERING FOR INDUSTRY-TRANSACTIONS OF THE ASME, 1980, 102 (04) :303-309