Chemical Effects on Formation and Propagation of Comb Cracks in Coated Cemented Carbide Milling Inserts

作者: Klas Jonsson Wildner

DOI:

关键词:

摘要: The report aims to investigate the influence of chemical reactions on comb crack formation and propagation in coated cemented carbide milling inserts with different compositions. A series novel experimental techniques have been developed applied understand oxidation corrosion effects cracks. Furthermore microstructure changes region cracks worn were studied by high resolution microscopy. It has observed that main effect is connected an attack binder phase, affecting its composition, distribution morphology. Different types for dry wet observed. In presence cooling media (wet machining) present lateral (fatigue induced) principal crack, which form at regions where strongly corroded. Despite addition Cr (Ta,Nb)C enhance both resistance a minor Schematic models based results scientific discussions are presented

参考文章(13)
F.J.J. Kellner, H. Hildebrand, S. Virtanen, Effect of WC grain size on the corrosion behavior of WC–Co based hardmetals in alkaline solutions International Journal of Refractory Metals & Hard Materials. ,vol. 27, pp. 806- 812 ,(2009) , 10.1016/J.IJRMHM.2009.02.004
Xiaoliang Shi, Hua Yang, Gangqin Shao, Xinglong Duan, Sheng Wang, Oxidation of ultrafine-cemented carbide prepared from nanocrystalline WC–10Co composite powder Ceramics International. ,vol. 34, pp. 2043- 2049 ,(2008) , 10.1016/J.CERAMINT.2007.07.029
Sutha Sutthiruangwong, Gregor Mori, Corrosion properties of Co-based cemented carbides in acidic solutions International Journal of Refractory Metals & Hard Materials. ,vol. 21, pp. 135- 145 ,(2003) , 10.1016/S0263-4368(03)00027-1
L. S. Sigl, H. E. Exner, Experimental study of the mechanics of fracture in WC-Co alloys Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 18, pp. 1299- 1308 ,(1987) , 10.1007/BF02647199
K.P. Mingard, H.G. Jones, M.G. Gee, B. Roebuck, J.W. Nunn, In situ observation of crack growth in a WC-Co hardmetal and characterisation of crack growth morphologies by EBSD. International Journal of Refractory Metals & Hard Materials. ,vol. 36, pp. 136- 142 ,(2013) , 10.1016/J.IJRMHM.2012.08.006
Bengt Johannesson, Richard Warren, Subcritical crack growth and plastic deformation in the fracture of hard metals Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. pp. 353- 361 ,(1988) , 10.1016/0025-5416(88)90717-3
V.B. Voitovich, V.V. Sverdel, R.F. Voitovich, E.I. Golovko, Oxidation of WC-Co, WC-Ni and WC-Co-Ni hard metals in the temperature range 500–800 °C International Journal of Refractory Metals & Hard Materials. ,vol. 14, pp. 289- 295 ,(1996) , 10.1016/0263-4368(96)00009-1
M. Hellsing, H. -O. Andrén, H. Nordén, A. Henjered, Quantitative microanalysis of carbide/carbide interfaces in WC–Co-base cemented carbides Materials Science and Technology. ,vol. 2, pp. 847- 855 ,(1986) , 10.1179/MST.1986.2.8.847
M. Aristizabal, J.M. Sanchez, N. Rodriguez, F. Ibarreta, R. Martinez, Comparison of the oxidation behaviour of WC–Co and WC–Ni–Co–Cr cemented carbides Corrosion Science. ,vol. 53, pp. 2754- 2760 ,(2011) , 10.1016/J.CORSCI.2011.05.006
C.F. Barbatti, F. Sket, J. Garcia, A. Pyzalla, Influence of binder metal and surface treatment on the corrosion resistance of (W,Ti)C-based hardmetals Surface & Coatings Technology. ,vol. 201, pp. 3314- 3327 ,(2006) , 10.1016/J.SURFCOAT.2006.07.135