Synthesis of boride coatings on steel using plasma transferred arc (PTA) process and its wear performance

Iakovou, R; Bourithis, L; Papadimitriou, G

dc.contributor.author	Iakovou, R	en
dc.contributor.author	Bourithis, L	en
dc.contributor.author	Papadimitriou, G	en
dc.date.accessioned	2014-03-01T01:18:23Z
dc.date.available	2014-03-01T01:18:23Z
dc.date.issued	2002	en
dc.identifier.issn	0043-1648	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14974
dc.subject	Boron coatings	en
dc.subject	PTA surfacing	en
dc.subject	Weld-surfacing	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Cracks	en
dc.subject.other	Eutectics	en
dc.subject.other	Friction	en
dc.subject.other	Hardness	en
dc.subject.other	Microstructure	en
dc.subject.other	Mixtures	en
dc.subject.other	Oxidation	en
dc.subject.other	Plasma applications	en
dc.subject.other	Synthesis (chemical)	en
dc.subject.other	Tool steel	en
dc.subject.other	Wear of materials	en
dc.subject.other	Plasma transferred arc (PTA)	en
dc.subject.other	Boride coatings	en
dc.subject.other	boriding	en
dc.subject.other	coating	en
dc.subject.other	performance assessment	en
dc.subject.other	plasma treatment	en
dc.subject.other	wear prevention	en
dc.subject.other	welding	en
dc.title	Synthesis of boride coatings on steel using plasma transferred arc (PTA) process and its wear performance	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0043-1648(02)00056-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0043-1648(02)00056-X	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Boriding of the surface of a tool steel using boron powder and the plasma transferred arc process was investigated. It was shown that this method is an easy and effective technique in producing uniform alloyed layers with a thickness of about 1.5 mm and a hardness between 1000 and 1300 HV The microstructure of the borided surfaces consists of primary Fe2B-type borides and a eutectic mixture of borides and martensite. Some cracks are observed in the eutectic regions but they do not seem to critically affect the behaviour of the coatings in sliding wear. The wear rate of pin on disc tests is primarily affected by the applied load and it lies between 10(-5) mm(3)/m for low loads and 10(-2) mm(3)/m for high loads. Two distinct regimes of mild and severe wear are obtained separated by a critical load. Mild wear is due to the load supporting effect of borides and severe wear is due to their breakage above a critical load. The wear rate is not significantly affected by the sliding velocity and is consistent with the friction coefficient. The friction coefficient varies from 0.13 to 0.23 and depends strongly on the oxidation status of the wear track. The sliding velocity affects the sliding distance where the coefficient of friction reaches equilibrium. (C) 2002 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Wear	en
dc.identifier.doi	10.1016/S0043-1648(02)00056-X	en
dc.identifier.isi	ISI:000176791700016	en
dc.identifier.volume	252	en
dc.identifier.issue	11-12	en
dc.identifier.spage	1007	en
dc.identifier.epage	1015	en