Full Densification in PM Steels Through Liquid Phase Sintering and HIP Approach
Paper i proceeding, 2018

High-density powder metallurgy (PM) components are required for high-performance applications. Liquid phase sintering (LPS) is one such method to improve the densification, especially the master alloy route is preferred due to the flexibility in tailoring the alloying contents. In this study, gas atomised Ni-Mn-B master alloy powder of size fraction < 45 µm was admixed with water atomised iron and Mo- prealloyed powder. During sintering, there was a significant densification due to LPS where the liquid formation occurred in two stages, one from the master alloy melting and another from the eutectic liquid formation, enabling densities > 95%. The microstructural investigation revealed that the surface densification was achieved after sintering in H2 containing atmosphere. Capsule free hot isostatic pressing was performed on these samples to achieve full density. This approach of combining LPS and capsule free hot isostatic pressing demonstrates the potential in reaching full densification in high- performance PM steel components.

master alloy

liquid phase sintering

full density

PM steel

HIP

surface densification

Författare

Maheswaran Vattur Sundaram

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Kumar Babu Surreddi

Hogskolan Dalarna

Eduard Hryha

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Angela Veiga

Centro de Estudios e Investigaciones Tecnicas

Sigurd Berg

Höganäs

Fransisco Castro

Centro de Estudios e Investigaciones Tecnicas

Lars Nyborg

Chalmers, Industri- och materialvetenskap

Euro PM2018 Proceedings

Euro PM2018
Bilbao, Spain,

Drivkrafter

Hållbar utveckling

Styrkeområden

Produktion

Materialvetenskap

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Materialkemi

Metallurgi och metalliska material

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Senast uppdaterat

2018-10-18