Synthesizing a class ""M"" high speed steel on the surface of a plain steel using the plasma transferred arc (PTA) alloying technique: Microstructure and wear properties

Bourithis, L; Papadimitriou, GD

dc.contributor.author	Bourithis, L	en
dc.contributor.author	Papadimitriou, GD	en
dc.date.accessioned	2014-03-01T01:19:35Z
dc.date.available	2014-03-01T01:19:35Z
dc.date.issued	2003	en
dc.identifier.issn	0921-5093	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15595
dc.subject	AISI M2	en
dc.subject	Alloying	en
dc.subject	High speed steel	en
dc.subject	Plasma transferred arc	en
dc.subject	Wear	en
dc.subject.classification	Nanoscience & Nanotechnology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Hardness	en
dc.subject.other	Microstructure	en
dc.subject.other	Oxidation	en
dc.subject.other	Plastic deformation	en
dc.subject.other	Powders	en
dc.subject.other	Synthesis (chemical)	en
dc.subject.other	Wear resistance	en
dc.subject.other	High speed steel	en
dc.subject.other	Steel	en
dc.subject.other	alloy	en
dc.subject.other	microstructure	en
dc.subject.other	plasma treatment	en
dc.subject.other	processing technique	en
dc.subject.other	steel	en
dc.subject.other	wear	en
dc.subject.other	wear problem	en
dc.title	Synthesizing a class ""M"" high speed steel on the surface of a plain steel using the plasma transferred arc (PTA) alloying technique: Microstructure and wear properties	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0921-5093(03)00511-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0921-5093(03)00511-2	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	A class M2 high speed steel layer was synthesized from powders on the surface of a plain steel using the plasma transferred arc (PTA) process. This technique is an easy and effective one in producing relatively uniform alloy layers having a thickness of the order of 1.2-1.5 mm and hardness around 750 HV200g. The layers have a fine cast microstructure consisting of a dendritic matrix of martensite/residual austenite embedded in a duplex M6C and M2C eutectic. Tempering experiments in the temperature range between 200 and 800degreesC show that residual austenite decomposes progressively above 400degreesC and a fine precipitation of carbides occurs within the matrix, while the M2C carbides transform to M6C. Peak hardness of about 1100 HV is obtained after heat treatment at 600degreesC for 2 h. Pin-on-disc wear experiments were done on both the untreated and heat treated layers. The wear resistance of the untreated specimens was very low (wear rate of the order of 10(-4) mm(3)/m) and was further improved by an order of magnitude for the specimens treated at peak hardness. The friction coefficient was very low, of the order of 0.10, for both the treated and untreated specimens. The dominant wear mechanism in both cases was plastic deformation with the matrix preferentially worn and the carbides supporting the applied load. Oxidation of the wear debris occurred only for the highest applied loads and sliding speeds of the untreated specimens, but it was very slight, so that the wear coefficient remained low, corresponding for all the experiments to the Al2O3-carbides tribosystem. (C) 2003 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Materials Science and Engineering A	en
dc.identifier.doi	10.1016/S0921-5093(03)00511-2	en
dc.identifier.isi	ISI:000186354700021	en
dc.identifier.volume	361	en
dc.identifier.issue	1-2	en
dc.identifier.spage	165	en
dc.identifier.epage	172	en