Mechanical property and structure relationships in hard coatings for cutting tools

1988 ◽  
Vol 6 (3) ◽  
pp. 2149-2157 ◽  
Author(s):  
Dennis T. Quinto
Keyword(s):  
Mechanical Property ◽  
Cutting Tools ◽  
Hard Coatings ◽  
Coatings For Cutting Tools

scholarly journals An Insight into TiN, TiAlN and AlTiN Hard Coatings for Cutting Tools

2020 ◽  
Vol 17 (2) ◽  
pp. 87-89
Author(s):  
Magdalena Valentina Lungu
Keyword(s):  
Quality Improvement ◽  
Surface Quality ◽  
Metal Cutting ◽  
Large Range ◽  
Cutting Tools ◽  
Hard Coatings ◽  
Metalworking Industry ◽  
Tool Surface ◽  
Insight Into ◽  
Coatings For Cutting Tools

The evolution of the metalworking industry over the centuries was greatly influenced by the development of a large range of cutting tools. Tool surface quality improvement with hard coatings generated considerable progress in the metal cutting industry. Hard coatings were composed mainly of nitrides, carbides, borides, and oxides of transition metals (typically Ti, Cr, Zr).1-5

scholarly journals Wear Resistance of (Ti,Al)N Metallic Coatings for Extremal Working Conditions

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 157
Author(s):  
Jarosław Mikuła ◽  
Daniel Pakuła ◽  
Ludwina Żukowska ◽  
Klaudiusz Gołombek ◽  
Antonín Kříž
Keyword(s):  
Wear Resistance ◽  
Functional Properties ◽  
Tool Life ◽  
Cutting Tools ◽  
Hard Coatings ◽  
Metallographic Analysis ◽  
Process Conditions ◽  
Tool Materials ◽  
Coated Materials ◽  
Wide Range

The article includes research results for the functional properties achieved for a wide range of sintered tool materials, including sintered carbides, cermets and three types of Al2O3 oxide tool ceramics ((Al2O3 + ZrO2, Al2O3 + TiC and Al2O3 + SiC(w)) with (Ti,Al)N coating deposited in the cathodic arc evaporation (CAE-PVD) method and comparison with uncoated tool materials. For all coated samples, a uniform wear pattern on tool shank was observed during metallographic analysis. Based on the scanning electron microscope (SEM) metallographic analysis, it was found that the most common types of tribological defects identified in tested materials are: mechanical defects and abrasive wear of the tool side, crater formation on the tool face, cracks on the tool side, chipping on the cutting edge and built-up edge from chip fragments. Deposition of (Ti,Al)N coating on all tested substrates increases the wear resistance and also limits the exceeding of critical levels of permanent stresses. It even increases the tool life many times over. Such a significant increase in tool life results, among other things, from a large increase in microhardness of PVD coated materials compared to uncoated samples, increased resistance to thermal and chemical abrasion, improved chip formation and removal process conditions. Use of hard coatings applied to sintered tool materials is considered to be one of the most important achievements in improving the functional properties of cutting tools and can still be developed by improving the coating structure solutions (sorted and nanocrystalline structures) and extending the range of coating applications (Ti,Al)N in a variety of substrates.

State of the art in hard coatings for carbide cutting tools

1998 ◽  
Vol 102 (3) ◽  
pp. 183-190 ◽  
Author(s):  
H.G. Prengel ◽  
W.R. Pfouts ◽  
A.T. Santhanam
Keyword(s):  
State Of The Art ◽  
Cutting Tools ◽  
Hard Coatings

The Influence of Machining Condition Forming Multilayer Coatings for Cutting Tools

2011 ◽  
Vol 496 ◽  
pp. 80-85 ◽  
Author(s):  
V.P. Tabakov
Keyword(s):  
Cutting Tools ◽  
Multilayer Coatings ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Machining Conditions ◽  
Study Results ◽  
Coatings For Cutting Tools

The study has shown a correlation between the machining conditions and peculiarities of damage occurring to wear-resistant coatings in the process of cutting. The study has made it possible to formulate requirements for wear-resistant coatings and the principle of forming multilayer coatings depending on machining conditions. The article presents study results illustrating the efficiency of cutting tools with multilayer coatings.

scholarly journals Development of a Model of Crack Propagation in Multilayer Hard Coatings under Conditions of Stochastic Force Impact

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 260
Author(s):  
Alexey Vereschaka ◽  
Sergey Grigoriev ◽  
Anatoli Chigarev ◽  
Filipp Milovich ◽  
Nikolay Sitnikov ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Crystalline Structure ◽  
Cutting Tools ◽  
Growth Direction ◽  
Hard Coatings ◽  
Probability Density Distribution ◽  
Crack Propagation Velocity ◽  
Stochastic Force ◽  
Stochastic Loading ◽  
Cracking Pattern

The article deals with the problems of cracking in the structure of multilayered coatings under the conditions of stochastic loading process. A mathematical model has been proposed in order to predict the crack propagation velocity in the coating while taking the influence of interlayer interfaces into account. A technique for calculating the probability density distribution of the coating fracture (failure rate) has been developed. The probability of a change in the crack growth direction is compared with the experimental data that were obtained as a result of the studies focused on the pattern of cracking in the Zr,Nb-(Zr,Nb)N-(Zr,Nb,Al)N and Ti-TiN-(Ti,Cr,Al)N coatings under the conditions of the real stochastic loading of cutting tools during the turning. The influence of the crystalline structure of the coating on the cracking pattern has been studied. The investigation has found the significant effect of the crystalline structure of the coating layers on the cracking pattern.

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