scholarly journals Modelling and Experimental Investigation of Cutting Temperature when Rough Turning Hardened Tool Steel with PCBN Tools

Procedia CIRP ◽  
2015 ◽  
Vol 31 ◽  
pp. 489-495 ◽  
Author(s):  
V. Kryzhanivskyy ◽  
V. Bushlya ◽  
O. Gutnichenko ◽  
I.A. Petrusha ◽  
J.-E. Ståhl
Keyword(s):  
Experimental Investigation ◽  
Tool Steel ◽  
Cutting Temperature ◽  
Hardened Tool Steel ◽  
Rough Turning ◽  
Pcbn Tools

NAK 80

Alloy Digest ◽  
1998 ◽  
Vol 47 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Tool Steel ◽  
Hardened Tool Steel

Abstract NAK 80 is a precipitation-hardened tool steel for molds with a similar through hardness. The alloy is used when exceptional polishing is required. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on joining and surface treatment. Filing Code: SA-495. Producer or source: International Mold Steels Inc.

scholarly journals Investigation of the Wear Behavior of PVD Coated Carbide Tools during Ti6Al4V Machining with Intensive Built Up Edge Formation

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 266
Author(s):  
M.S.I. Chowdhury ◽  
B. Bose ◽  
S. Rawal ◽  
G.S. Fox-Rabinovich ◽  
S.C. Veldhuis
Keyword(s):  
Tool Wear ◽  
Titanium Alloys ◽  
Wear Behavior ◽  
Cutting Temperature ◽  
Ti6al4v Alloy ◽  
Adhesive Interaction ◽  
Heavy Load ◽  
Micromechanical Properties ◽  
Rough Turning ◽  
Coated Carbide

Tool wear phenomena during the machining of titanium alloys are very complex. Severe adhesive interaction at the tool chip interface, especially at low cutting speeds, leads to intensive Built Up Edge (BUE) formation. Additionally, a high cutting temperature causes rapid wear in the carbide inserts due to the low thermal conductivity of titanium alloys. The current research studies the effect of AlTiN and CrN PVD coatings deposited on cutting tools during the rough turning of a Ti6Al4V alloy with severe BUE formation. Tool wear characteristics were evaluated in detail using a Scanning Electron Microscope (SEM) and volumetric wear measurements. Chip morphology analysis was conducted to assess the in situ tribological performance of the coatings. A high temperature–heavy load tribometer that mimics machining conditions was used to analyze the frictional behavior of the coatings. The micromechanical properties of the coatings were also investigated to gain a better understanding of the coating performance. It was demonstrated that the CrN coating possess unique micromechanical properties and tribological adaptive characteristics that minimize BUE formation and significantly improve tool performance during the machining of the Ti6Al4V alloy.

Diffusion and Oxidation Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics

2014 ◽  
Vol 538 ◽  
pp. 54-57
Author(s):  
Fang Shao ◽  
Yu Ting Wang ◽  
Li Jing Zou ◽  
Yan Ying Wu ◽  
Dong Sun
Keyword(s):  
High Temperature ◽  
High Speed ◽  
Cutting Temperature ◽  
Tool Material ◽  
Diffusion Reaction ◽  
Depth Of Cut ◽  
Pcbn Tool ◽  
Diffusion Wear ◽  
Pcbn Tools ◽  
Oxidation Wear

Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

Effect of Heat Treatment on the Structure, Wear and Corrosion of AISI L6 Tool Steel

2021 ◽  
Vol 406 ◽  
pp. 448-456
Author(s):  
Oualid Ghelloudj ◽  
Amel Gharbi ◽  
Djamel Zelmati ◽  
Khedidja Bouhamla ◽  
Chems Eddine Ramoul ◽  
...  
Keyword(s):  
Tool Steel ◽  
Tribological Behavior ◽  
Wear Testing ◽  
Wear And Corrosion ◽  
Hardening Treatment ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Hardened Tool Steel ◽  
Hardness Increase ◽  
Steel Hardening

This work is a contribution in analyzing structure, tribological behavior and corrosion of AISI L6 hardened tool steel. Structural characterization and tribological behavior of steel were investigated using Optical Microscopy (OM), Scanning electron microscopy (SEM), wear testing by friction on a pin-on-disc Tribometer and corrosion by potentiodynamic polarization. Comparing to the as-received steel, hardening has generated a fine martensitic microstructure causing a 1.5 times hardness increase. Hardening has contributed to improvement of wear resistance as the coefficient of friction has decreased from 0.86 to 0.67μ. An increase in corrosion resistance was observed after hardening treatment.

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