Mechanical and Microstructural Characterisation of P/M High-Speed Steel Valve Seat Inserts

Salgado, Lucio; Filho, E.S. Jesus; Jesus, Edilson Rosa Barbarosa; Filho, Francisco Ambrozio; Rossi, Jesualdo Luiz; Santos, João Batista Oliveira dos; Colosio, Marco Antonio

doi:10.4028/www.scientific.net/msf.416-418.312

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…Furthermore, the addition of NbC particles leads to an increase of the radial crushing strength, which attains values similar to those for the most expensive Fe-Co alloy (Salgado et al, 2003). On the other hand, the "Mn content iron powder + MoS 2 " method has proved to be very efficient to enhance the machinability without decreasing the radial crushing strength (Kawata and Hayashi, 2002 In previous studies (Trabadelo et al, 2002(Trabadelo et al, , 2003, the PM T42 HSS was proposed as a suitable material for manufacturing structural components.…”

Section: Introductionmentioning

confidence: 77%

Development of powder metallurgy T42 high speed steel for structural applications

Trabadelo¹,

Giménez²,

Iturriza³

2008

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 77%

Development of powder metallurgy T42 high speed steel for structural applications

Trabadelo¹,

Giménez²,

Iturriza³

2008

Journal of Materials Processing Technology

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“…Other physical properties intrinsically related to mechanical property are the relative density and the crush radial strength (CRS) of a component. These are the main properties of the VSI and had already been studied by other authors such as Salgado et al 49 and Jesus Filho et al 2,9 . A summary of the mechanical and physical properties of the heat-treated alloys is given in Table 3.…”

Section: Resultsmentioning

confidence: 97%

Heat Treatment of Sintered Valve Seat Inserts

et al. 2018

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The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI were quenched in air followed by double tempering at seven different temperatures. The cooling rate during air quenching was measured by means of a thermocouple type k attached to a data acquisition system. The characterization of the mechanical and physical properties of the VSIs was achieved by measuring relative density, apparent hardness and crush radial strength. The resulting microstructures for the sintered parts were interpreted using the isothermal and continuous cooling transformation diagrams for similar alloys. The VSI obtained with AISI M3:2 and AISI M2 high-speed steels after air quenching and double tempering at 600 ºC showed the best results in terms of apparent hardness and crush radial strength.

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“…The present project was focused in the obtention of new materials by less complex processes and application of cheaper and less aggressive elements. This is the case of cobalt substitution due its high cost and the replacement of lead by other less toxic and non-pollutant element [4][5][6]. Another objective of this work was to reduce the sintering temperature and improve machining characteristics [4,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…This is the case of cobalt substitution due its high cost and the replacement of lead by other less toxic and non-pollutant element [4][5][6]. Another objective of this work was to reduce the sintering temperature and improve machining characteristics [4,7,8]. The decrease of the sintering temperature of the present alloy allowed the use of traditional sintering equipment commonly found in the PM industries that operates continually at 1150 ˚C maximum temperatures.…”

Section: Introductionmentioning

confidence: 99%

Sintered Valve Seat Inserts – Microstructural Characterisation

Filho

Jesus

Salgado³

et al. 2006

MSF

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This work presents aspects related to new sintered materials for valve seat inserts application. Two types of materials were evaluated. The materials were made using powder metallurgy technique from a basic mixture of high-speed steel (AISI M3/2), iron and carbide powders. The microstructures of these materials before and after heat treatment are presented. Under the heat treatment condition, the activation of the diffusion mechanism among phases was promoted and a better distribution of the Cu phases along the matrix was achieved. The results indicate that the materials under development have a potential for commercial application as valve seat inserts.

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Mechanical and Microstructural Characterisation of P/M High-Speed Steel Valve Seat Inserts

Cited by 4 publications

References 3 publications

Development of powder metallurgy T42 high speed steel for structural applications

Development of powder metallurgy T42 high speed steel for structural applications

Heat Treatment of Sintered Valve Seat Inserts

Sintered Valve Seat Inserts – Microstructural Characterisation

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