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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

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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 http://hdl.handle.net/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


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