Active wear and failure mechanisms of TiN-Coated high speed steel and tin-coated cemented carbide tools when machining powder metallurgically made stainless steels

1996 ◽  
Vol 27 (9) ◽  
pp. 2796-2808 ◽  
Author(s):  
Laizhu Jiang ◽  
Hannu HÄnninen ◽  
Jukka Paro ◽  
Veijo Kauppinen
Keyword(s):  
Stainless Steels ◽  
High Speed ◽  
Failure Mechanisms ◽  
High Speed Steel ◽  
Cemented Carbide ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

Fatigue Fracture Investigation of Cemented Carbide Tools in Gear Hobbing, Part 1: FEM Modeling of Fly Hobbing and Computational Interpretation of Experimental Results

2002 ◽  
Vol 124 (4) ◽  
pp. 784-791 ◽  
Author(s):  
A. Antoniadis ◽  
N. Vidakis ◽  
N. Bilalis
Keyword(s):  
High Speed ◽  
Cutting Tool ◽  
Complex Geometry ◽  
High Speed Steel ◽  
Cutting Performance ◽  
Cutting Process ◽  
Cemented Carbide ◽  
Fem Modeling ◽  
Gear Hobbing ◽  
Cemented Carbide Tools

Gear hobbing is a highly utilized flexible manufacturing process for massive production of external gears. However, the complex geometry of cutting hobs is responsible for the almost exclusive utilization of high-speed steel (HSS) as cutting tool material. The limited cutting performance of HSS, even coated HSS, restricts the application of high cutting speeds and restricts the full exploitation of modern CNC hobbing machine tools. The application of cemented carbide tools was considered as a potential alternative to modern production requirements. In former investigations an experimental variation of gear hobbing, the so-called fly hobbing was applied, in order to specify the cutting performance of cemented carbide tools in gear production. These thorough experiments indicated that cracks, which were not expected, might occur in specific cutting cases, leading to the early failure of the entire cutting tool. In order to interpret computationally the reasons for these failures, an FEM simulation of the cutting process was developed, supported by advanced software tools able to determine the chip formation and the cutting forces during gear hobbing. The computational results explain sufficiently the failure mechanisms and they are quite in line with the experimental findings. The first part of this paper applies the verified parametric FEM model for various cutting cases, indicating the most risky cutting teeth with respect to their fatigue danger. In a step forward, the second part of the paper illustrates the effect of various technological and geometric parameters to the expected tool life. Therefore, the optimization of the cutting process is enabled, through the proper selection of cutting parameters, which can eliminate the failure danger of cemented carbide cutting tools, thus achieving satisfactory cost effectiveness.

FAGERSTA WKE-45

Alloy Digest ◽  
1977 ◽  
Vol 26 (4) ◽  
Keyword(s):  
Wear Resistance ◽  
Stainless Steels ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Red Hardness

Abstract FAGERSTA WKE-45 is a tungsten-molybdenum high-speed steel containing 11% cobalt. It has greater red hardness and more wear resistance than almost any other high-speed steel and has adequate (medium) toughness. It is used mainly for lathe tools (for example, tool bits) where maximum wear resistance and red hardness are required. It is particularly suitable for working very hard and wear-inducing materials, including stainless steels. This datasheet provides information on composition and hardness. It also includes information on forming, heat treating, and machining. Filing Code: TS-317. Producer or source: Fagersta Steels Inc..

scholarly journals Wear mechanisms of uncoated and coated cemented carbide tools in machining lead-free silicon brass

Wear ◽  
2017 ◽  
Vol 376-377 ◽  
pp. 143-151 ◽  
Author(s):  
Volodymyr Bushlya ◽  
Daniel Johansson ◽  
Filip Lenrick ◽  
Jan-Eric Ståhl ◽  
Fredrik Schultheiss
Keyword(s):  
Wear Mechanisms ◽  
Cemented Carbide ◽  
Lead Free ◽  
Free Silicon ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

Study on the Coated Tool Wear Mechanism of High Speed Milling Ni-Base Superalloy GH625

2012 ◽  
Vol 723 ◽  
pp. 311-316
Author(s):  
Wei Wang ◽  
Ming Hai Wang ◽  
Xiao Peng Li
Keyword(s):  
Wear Mechanisms ◽  
High Speed ◽  
High Speed Milling ◽  
Coated Tools ◽  
Coated Tool ◽  
Tool Wear Mechanism ◽  
Cemented Carbide Tools ◽  
Tools Wear ◽  
Coated Cemented Carbide ◽  
Base Superalloy

The experiments of high speed milling Ni-base superalloy GH625 by using two types of the coated cemented carbide tools at home and abroad, using the scanning electron microscopy (SEM) to observe the tools wear morphology, analyzing the worn surface elements distribution by energy spectrum analysis (EDS) and the main wear mechanisms of the tools. The results show that adhesion, oxidation and diffusion are the main wear mechanisms in initiative wearing stage of the domestic coated tools. And the main wear mechanisms of the imported coated tools are adhesion, oxidation, diffusion and coating spallation.

Tool Wear of Aluminum/Chromium/Tungsten-Based-Coated Cemented Carbide in Cutting Hardened Steel

2015 ◽  
Vol 798 ◽  
pp. 377-383 ◽  
Author(s):  
Tadahiro Wada ◽  
Hiroyuki Hanyu
Keyword(s):  
Tool Wear ◽  
Cathode Material ◽  
Hardened Steel ◽  
Cemented Carbide ◽  
Coating Film ◽  
Carbide Tool ◽  
Micro Hardness ◽  
Cemented Carbide Tools ◽  
Coated Carbide ◽  
Coated Cemented Carbide

An aluminum/chromium based coating film, called (Al,Cr)N coating film, has been developed. This coating film has a slightly more inferior critical scratch load and micro-hardness. Therefore, to improve both the scratch strength and micro-hardness of the (Al,Cr)N coating film, the cathode material of an alumi-num/chromium/tungsten target was used in adding the tungsten (W) to the cathode material of the alumi-num/chromium target. To clarify the effectiveness of the aluminum/chromium/tungsten-based coating film, we measured the thickness, micro-hardness and critical scratch strength of aluminum/chromium/tungsten-based coating film formed on the surface of a substrate of cemented carbide ISO K10 formed by the arc ion plating process. The hardened steel ASTM D2 was turned with the (Al,Cr,W)N, (Al,Cr,W)(C,N), (Al,Cr)N and the (Ti,Al)N coated cemented carbide tools. The tool wear of the coated cemented carbide tools was ex-perimentally investigated. The following results were obtained: (1) The micro-hardness of the (Al,Cr,W)N or (Al,Cr,W)(C,N), (Al,Cr)N coating film was 3110 HV0.25N or 3080 HV0.25N, respectively. (2) The critical scratch load of the (Al,Cr,W)(C,N) coating film was 123 N, which was much higher than that of the (Al,Cr)N or (Ti,Al)N coating film. (3) In cutting the hardened steel using (Al,Cr,W)(C,N) and (Ti,Al)N coated carbide tools, the wear progress of the (Al,Cr,W)(C,N) coated carbide tool was almost equivalent to that of the (Ti,Al)N coated carbide tool. The above results clarify that the aluminum/chromium/tungsten-based coating film, which is a new type of coating film, has both high hardness and good adhesive strength, and can be used as a coating film of WC-Co cemented carbide cutting tools.

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