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Textured insert for improved heat extraction in combination with high-pressure cooling in turning of superalloys

Tamil Alagan, Nageswaran, 1990- (författare)
Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW
Beno, Tomas (preses)
Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT)
Klement, Uta (preses)
Chalmers University of Technology
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Wretland, Anders (preses)
GKN Aerospace Engine Systems AB, Trollhättan, Sweden
visa färre...
 (creator_code:org_t)
ISBN 9789187531637
Trollhättan : University West, 2017
Engelska 90 s.
Serie: Licentiate Thesis ; 19
  • Licentiatavhandling (övrigt vetenskapligt/konstnärligt)
Abstract Ämnesord
Stäng  
  • Heat generated in a machining process is a common and critical obstacle faced in today's machining industries. The heat generated in the cutting zone has a direct negative influence on the tool life which, in turn contributes to increase the manufacturing costs. Especially, in machining of Heat Resistant Super Alloys, HRSA this is a very limiting factor. HRSA are capable of retaining their mechanical strength and hardness at elevated temperatures. This property is advantageous in the application in e.g. aero-engines but also a disadvantage, since it also lowers the machinability significantly. This work is an attempt to improve the heat transfer from the cutting zone, which would lead to an increase in the tool life. To achieve this goal, the cutting tool has been modified to create an improved interface between the coolant and tool in the high-temperature areas. Two generations of inserts have been designed and investigated. Firstly, an insert with surface texture features has been created with the purpose of increasing the available surface area for heat dissipation: First generation, Gen I. Secondly, a GenII was designed as a further improvement of Gen I. Here, several channel features on the rake face were added, reaching out from the contact zone to the near proximity of the cutting edge. This with the purpose of improving access of the coolant closer to the cutting edge. The experiments were conducted in facing operations of Alloy 718 with uncoated round carbide inserts. All experiments were carried out with high-pressure coolant assistance, with a pressure of 16 MPa on the rake face and 8 MPa on the flankface, respectively.The two generations of inserts, Gen I and Gen II, were experimentally evaluated by tool wear analysis in comparison with a regular insert. The results shows that the tool life increased significantly for the Gen I insert, compared to a catastrophic failure of the regular insert at the same conditions. Regarding the Gen II insert,an increase in tool life by approximately 30 to 40 percent compared to Gen I insert was observed.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

Nyckelord

Alloy 718; High-pressure coolant; Heat dissipation
Textured insert; Tungsten carbide
Tool life
Tool wear
Production Technology
Produktionsteknik
Manufacturing and materials engineering
Produktions- och materialteknik

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Av författaren/redakt...
Tamil Alagan, Na ...
Beno, Tomas
Klement, Uta
Wretland, Anders
Om ämnet
TEKNIK OCH TEKNOLOGIER
TEKNIK OCH TEKNO ...
och Materialteknik
och Bearbetnings yt ...
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Högskolan Väst

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