Atmosphere control during hot isostatic pressing of capsule-free materials
Paper i proceeding, 2019

Producing components via powder yields a final product with few process steps. In order to get improved mechanical properties, final consolidation using hot isostatic pressing (HIP) is often performed. In this work, the aim is to include atmosphere control for HIP of capsule-free materials, e.g., additively manufactured components or conventionally pressed and sintered materials. Atmosphere control is applied for various purposes, such as carburising, e.g., traditional case hardening, or introducing an inert furnace atmosphere for HIP of sensitive materials. Carburisation experiments have been performed in a HIP-unit using methane as carbon source. The material response has been evaluated based on varying ratios of methane, time for carburising, ingoing densities, and alloy composition. The results show that porosity has a strong influence on carbon uptake, and lower density yields more carbon. As expected, a strong relation between added methane content and carbon uptake is also seen. Carburisation times of a few minutes gave little effect, however, 60 minutes gave approximately 500µm carburisation depth.

Författare

Hans Magnusson

Swerim AB

Johannes Gårdsstam

Quintus Technologies AB

Bartek Kaplan

Linde AG

Dimitris Chasoglou

Höganäs

Maheswaran Vattur Sundaram

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Lars Nyborg

Produktion

Christos Oikonomou

Uddeholm

Giulio Maistro

Uddeholm

Euro PM 2019 Congress and Exhibition

European Powder Metallurgy Congress and Exhibition, Euro PM 2019
Maastricht, Netherlands,

Ämneskategorier

Kemiska processer

Annan kemi

Metallurgi och metalliska material

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Senast uppdaterat

2021-03-19