Atmosphere control at hot isostatic pressing of PM components
|Coordinator||SWERIM AB - Swerim AB, Kista|
|Funding from Vinnova||SEK 2 330 000|
|Project duration||September 2018 - June 2022|
|Venture||The strategic innovation programme for Metallic material|
Purpose and goal
In order to produce a component with sufficient mechanical properties, final compaction is typically made by using hot isostatic press (HIP). Special interest in this work is to further develop the use of these presses by making more metallurgical treatments in the same heating cycle. Beside compaction the press can harden the material by rapid cooling, and in this proposal it is explained how atmosphere control can control the surface reactions.
Expected results and effects
In this project it will be evaluated how atmosphere control can control the surface reactions during hot-isostatic pressing. This can be carburising the component giving high hardness at surface, or avoiding surface oxides. The expected effect is to provide a robust method which include many metallurgical processes, which will give a resource effect method since reheating is not needed. In addition, the method is expected to reduce lead-time in production.
Planned approach and implementation
Material is produce at the material producing companies (Uddeholm and Höganäs). Components are produced via different routes such as sintered and additive manufactured componenets. HIP trials are made at Quintus, with help from AGA regarding atmosphere control. Produced samples are then characterised at both Chalmers and KIMAB. The input from the experiments is then used to optimise the method based on the need from the industry.