Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM
Cemented carbides are composed of tungsten carbide and cobalt as a binder. Tungsten carbide (WC) can be decomposed into tungsten and carbon at about 620°C in air, and the carbon that separates from WC reacts with oxygen to form carbon dioxide gas. In this study, these phenomena are applied to the el...
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| Veröffentlicht in: | Journal of The Japan Society of Electrical Machining Engineers 2016, Vol.50(125), pp.205-211 |
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| container_title | Journal of The Japan Society of Electrical Machining Engineers |
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| creator | TAMURA, Takeo URATA, Yasuhiro |
| description | Cemented carbides are composed of tungsten carbide and cobalt as a binder. Tungsten carbide (WC) can be decomposed into tungsten and carbon at about 620°C in air, and the carbon that separates from WC reacts with oxygen to form carbon dioxide gas. In this study, these phenomena are applied to the electrical discharge machining (EDM) of cemented carbides in deionized water. First, using deionized water as the dielectric working fluid, it is ensured that dissolved oxygen exists in the liquid. Secondly, as EDM is a removal method based on melting and evaporation, the workpiece temperature around the sparking area exceeds the melting point of the material. Therefore, cemented carbides are machined by EDM in deionized water. As a result, it was found that the debris obtained during EDM is composed of tungsten (W) and tungsten oxide (WO3). Moreover, the carbon that separates from WC reacts with the dissolved oxygen in the gap between the electrode and the workpiece to form carbon dioxide gas. Thus, in the EDM of cemented carbides in deionized water, the removal mechanism based on the decomposition of tungsten carbide is in effect as well as that based on melting and evaporation. |
| doi_str_mv | 10.2526/jseme.50.205 |
| format | Article |
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Tungsten carbide (WC) can be decomposed into tungsten and carbon at about 620°C in air, and the carbon that separates from WC reacts with oxygen to form carbon dioxide gas. In this study, these phenomena are applied to the electrical discharge machining (EDM) of cemented carbides in deionized water. First, using deionized water as the dielectric working fluid, it is ensured that dissolved oxygen exists in the liquid. Secondly, as EDM is a removal method based on melting and evaporation, the workpiece temperature around the sparking area exceeds the melting point of the material. Therefore, cemented carbides are machined by EDM in deionized water. As a result, it was found that the debris obtained during EDM is composed of tungsten (W) and tungsten oxide (WO3). Moreover, the carbon that separates from WC reacts with the dissolved oxygen in the gap between the electrode and the workpiece to form carbon dioxide gas. Thus, in the EDM of cemented carbides in deionized water, the removal mechanism based on the decomposition of tungsten carbide is in effect as well as that based on melting and evaporation.</description><identifier>ISSN: 0387-754X</identifier><identifier>EISSN: 1881-0888</identifier><identifier>DOI: 10.2526/jseme.50.205</identifier><language>eng ; jpn</language><publisher>Tokyo: Japan Society of Electrical Machining Engineers</publisher><subject>Carbides ; Carbon ; Carbon dioxide ; cemented carbide ; Cemented carbides ; Decomposition ; decomposition of tungsten carbide ; Deionization ; EDM ; EDM electrodes ; Electric discharge machining ; Evaporation ; Melting ; Oxygen ; removal mechanism ; Tungsten carbide ; Working fluids</subject><ispartof>Journal of The Japan Society of Electrical Machining Engineers, 2016, Vol.50(125), pp.205-211</ispartof><rights>2016 Japan Society of Electrical Machining Engineers</rights><rights>Copyright Japan Science and Technology Agency 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2045-8e4ca3c04a38bb798186d22bf502c3895ff12840226170fa418c4eea8b5bd3cb3</citedby><cites>FETCH-LOGICAL-c2045-8e4ca3c04a38bb798186d22bf502c3895ff12840226170fa418c4eea8b5bd3cb3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,1877,4010,27900,27901,27902</link.rule.ids></links><search><creatorcontrib>TAMURA, Takeo</creatorcontrib><creatorcontrib>URATA, Yasuhiro</creatorcontrib><title>Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM</title><title>Journal of The Japan Society of Electrical Machining Engineers</title><addtitle>Journal of the Japan Society of Electrical Machining Engineers</addtitle><description>Cemented carbides are composed of tungsten carbide and cobalt as a binder. Tungsten carbide (WC) can be decomposed into tungsten and carbon at about 620°C in air, and the carbon that separates from WC reacts with oxygen to form carbon dioxide gas. In this study, these phenomena are applied to the electrical discharge machining (EDM) of cemented carbides in deionized water. First, using deionized water as the dielectric working fluid, it is ensured that dissolved oxygen exists in the liquid. Secondly, as EDM is a removal method based on melting and evaporation, the workpiece temperature around the sparking area exceeds the melting point of the material. Therefore, cemented carbides are machined by EDM in deionized water. As a result, it was found that the debris obtained during EDM is composed of tungsten (W) and tungsten oxide (WO3). Moreover, the carbon that separates from WC reacts with the dissolved oxygen in the gap between the electrode and the workpiece to form carbon dioxide gas. Thus, in the EDM of cemented carbides in deionized water, the removal mechanism based on the decomposition of tungsten carbide is in effect as well as that based on melting and evaporation.</description><subject>Carbides</subject><subject>Carbon</subject><subject>Carbon dioxide</subject><subject>cemented carbide</subject><subject>Cemented carbides</subject><subject>Decomposition</subject><subject>decomposition of tungsten carbide</subject><subject>Deionization</subject><subject>EDM</subject><subject>EDM electrodes</subject><subject>Electric discharge machining</subject><subject>Evaporation</subject><subject>Melting</subject><subject>Oxygen</subject><subject>removal mechanism</subject><subject>Tungsten carbide</subject><subject>Working fluids</subject><issn>0387-754X</issn><issn>1881-0888</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNpFkE1PAjEQhhujiQS5-QM28eri9IstRwT8SEAvmHjbtN1ZKIEttosJ_94qBE8z7zvPzJsMIbcU-kyywcM64hb7MimQF6RDlaI5KKUuSQe4KvJCis9r0ovRGQDBQQ4465C3CVq_3fnoWueb7BFX-tv5kPk6W-ybZWyxycY6GFdh5lKbMpoWq7M313blmmSYQzadzG_IVa03EXun2iUfT9PF-CWfvT-_jkez3DIQMlcorOYWhObKmGKoqBpUjJlaArNcDWVdU6YEMDagBdRaUGUFolZGmopbw7vk7nh3F_zXHmNbrv0-NCmyZECFpJxCkaj7I2WDjzFgXe6C2-pwKCmUv08r_55WyqRAJnx0xNex1Us8wzq0zm7wH6ZMnnbOM7vSocSG_wCLknZk</recordid><startdate>2016</startdate><enddate>2016</enddate><creator>TAMURA, Takeo</creator><creator>URATA, Yasuhiro</creator><general>Japan Society of Electrical Machining Engineers</general><general>Japan Science and Technology Agency</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>L7M</scope></search><sort><creationdate>2016</creationdate><title>Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM</title><author>TAMURA, Takeo ; URATA, Yasuhiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2045-8e4ca3c04a38bb798186d22bf502c3895ff12840226170fa418c4eea8b5bd3cb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng ; jpn</language><creationdate>2016</creationdate><topic>Carbides</topic><topic>Carbon</topic><topic>Carbon dioxide</topic><topic>cemented carbide</topic><topic>Cemented carbides</topic><topic>Decomposition</topic><topic>decomposition of tungsten carbide</topic><topic>Deionization</topic><topic>EDM</topic><topic>EDM electrodes</topic><topic>Electric discharge machining</topic><topic>Evaporation</topic><topic>Melting</topic><topic>Oxygen</topic><topic>removal mechanism</topic><topic>Tungsten carbide</topic><topic>Working fluids</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>TAMURA, Takeo</creatorcontrib><creatorcontrib>URATA, Yasuhiro</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of The Japan Society of Electrical Machining Engineers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TAMURA, Takeo</au><au>URATA, Yasuhiro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM</atitle><jtitle>Journal of The Japan Society of Electrical Machining Engineers</jtitle><addtitle>Journal of the Japan Society of Electrical Machining Engineers</addtitle><date>2016</date><risdate>2016</risdate><volume>50</volume><issue>125</issue><spage>205</spage><epage>211</epage><pages>205-211</pages><issn>0387-754X</issn><eissn>1881-0888</eissn><abstract>Cemented carbides are composed of tungsten carbide and cobalt as a binder. Tungsten carbide (WC) can be decomposed into tungsten and carbon at about 620°C in air, and the carbon that separates from WC reacts with oxygen to form carbon dioxide gas. In this study, these phenomena are applied to the electrical discharge machining (EDM) of cemented carbides in deionized water. First, using deionized water as the dielectric working fluid, it is ensured that dissolved oxygen exists in the liquid. Secondly, as EDM is a removal method based on melting and evaporation, the workpiece temperature around the sparking area exceeds the melting point of the material. Therefore, cemented carbides are machined by EDM in deionized water. As a result, it was found that the debris obtained during EDM is composed of tungsten (W) and tungsten oxide (WO3). Moreover, the carbon that separates from WC reacts with the dissolved oxygen in the gap between the electrode and the workpiece to form carbon dioxide gas. Thus, in the EDM of cemented carbides in deionized water, the removal mechanism based on the decomposition of tungsten carbide is in effect as well as that based on melting and evaporation.</abstract><cop>Tokyo</cop><pub>Japan Society of Electrical Machining Engineers</pub><doi>10.2526/jseme.50.205</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of The Japan Society of Electrical Machining Engineers, 2016, Vol.50(125), pp.205-211 |
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| language | eng ; jpn |
| recordid | cdi_proquest_journals_2014513107 |
| source | J-STAGE Free; EZB-FREE-00999 freely available EZB journals |
| subjects | Carbides Carbon Carbon dioxide cemented carbide Cemented carbides Decomposition decomposition of tungsten carbide Deionization EDM EDM electrodes Electric discharge machining Evaporation Melting Oxygen removal mechanism Tungsten carbide Working fluids |
| title | Decomposition Behavior of Tungsten Carbide in Cemented Carbide Machined by EDM |
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