Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment

Tungsten carbide is the most widely used material for cutting tools. Due to extreme demands higher tool life several types of coating have been introduced to prolong the service time which include diamond coating. However cobalt binder in tungsten carbide prevents diamond to adhere well on the subst...

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Main Author:	Khairul Azmi, Mohd Mawardzi
Format:	Undergraduates Project Papers
Language:	English
Published:	2012
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/4455/ http://umpir.ump.edu.my/id/eprint/4455/ http://umpir.ump.edu.my/id/eprint/4455/1/cd6634_64.pdf

id	ump-4455
recordtype	eprints
spelling	ump-44552015-03-03T09:19:07Z http://umpir.ump.edu.my/id/eprint/4455/ Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment Khairul Azmi, Mohd Mawardzi TJ Mechanical engineering and machinery Tungsten carbide is the most widely used material for cutting tools. Due to extreme demands higher tool life several types of coating have been introduced to prolong the service time which include diamond coating. However cobalt binder in tungsten carbide prevents diamond to adhere well on the substrate and its content at the outer surface should be reduce to below 1%. Pretreatments have been studied by many researchers. But to date poor adhesion of diamond coating still an issue. In this work a murakami pretreatment was used to etch tungsten carbide at the surface of the substrate in order to solve poor adhesion problem. First step with Murakami's reagent 20 minutes and the second step of the process were carried out by etching in a solution of hydrochloric acid (45 seconds). The effect of murakami pretreatments on Co cemented tungsten carbide samples were study in term of surface morphology, surface roughness, and cobalt removal from the surface was examined. Based on the experimental, the following conclusions can be withdrawn. It is found that murakami suface pretreatment affecting the final surface roughness of substrate. Murakami pretreatment able to strengthened the diamond coating adhesion by modifying the surface roughness. The wear resistance of coated tungsten carbide was higher than uncoated tungsten carbide. Cutting tool with coated tungsten carbide produced better work piece’s surface finish as compared to uncoated cutting tool. It was also further improved when pretreatment (murakami) was used. 2012-06 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/4455/1/cd6634_64.pdf Khairul Azmi, Mohd Mawardzi (2012) Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment. Faculty of Mechanical Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:69515&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Khairul Azmi, Mohd Mawardzi Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
description	Tungsten carbide is the most widely used material for cutting tools. Due to extreme demands higher tool life several types of coating have been introduced to prolong the service time which include diamond coating. However cobalt binder in tungsten carbide prevents diamond to adhere well on the substrate and its content at the outer surface should be reduce to below 1%. Pretreatments have been studied by many researchers. But to date poor adhesion of diamond coating still an issue. In this work a murakami pretreatment was used to etch tungsten carbide at the surface of the substrate in order to solve poor adhesion problem. First step with Murakami's reagent 20 minutes and the second step of the process were carried out by etching in a solution of hydrochloric acid (45 seconds). The effect of murakami pretreatments on Co cemented tungsten carbide samples were study in term of surface morphology, surface roughness, and cobalt removal from the surface was examined. Based on the experimental, the following conclusions can be withdrawn. It is found that murakami suface pretreatment affecting the final surface roughness of substrate. Murakami pretreatment able to strengthened the diamond coating adhesion by modifying the surface roughness. The wear resistance of coated tungsten carbide was higher than uncoated tungsten carbide. Cutting tool with coated tungsten carbide produced better work piece’s surface finish as compared to uncoated cutting tool. It was also further improved when pretreatment (murakami) was used.
format	Undergraduates Project Papers
author	Khairul Azmi, Mohd Mawardzi
author_facet	Khairul Azmi, Mohd Mawardzi
author_sort	Khairul Azmi, Mohd Mawardzi
title	Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
title_short	Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
title_full	Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
title_fullStr	Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
title_full_unstemmed	Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
title_sort	investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment
publishDate	2012
url	http://umpir.ump.edu.my/id/eprint/4455/ http://umpir.ump.edu.my/id/eprint/4455/ http://umpir.ump.edu.my/id/eprint/4455/1/cd6634_64.pdf
first_indexed	2023-09-18T21:59:03Z
last_indexed	2023-09-18T21:59:03Z
_version_	1777414275293249536

Investigation of machining performance of the coated carbide cutting tools with murakami surface pretreatment

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