Title : Ingot size effects during manufacturing and forging low density steels
To comply with strict policies on improving fuel economy and reducing CO2 emissions, the automotive industry is working to reduce car weight without penalising passenger safety. One of the strategies used to achieve this is to use lighter materials, and one option in this strategy is low-density steels. Low density steels are Fe-C-Mn-Al steels to which a relevant amount of aluminium is added to reduce the overall density of the steel. Due to their good combination of mechanical properties and density reduction, low density steels can be considered as good candidates in the lightweighting strategy and have attracted great interest in the automotive industry. This paper describes the fabrication of two low density steels: one austenitic and one duplex-austenitic, showing the difficulties encountered during the production and transformation of these steels depending on the scale of work. On a small scale, both manufacturing and subsequent forging were carried out without problems, but as the working scale increased, problems appeared. Possible causes of this scale dependence are proposed on the basis of the experimental results obtained, as well as the thermodynamic simulations and the hot axial compression tests carried out.
What will audience learn from your presentation?
- Different lightening strategies for the automotive industry
- Low density steels properties and characteristics
- Manufacturing and Forging issues of these low density steels
- In this presentation we are going to show the problems we have encountered when manufacturing and forging low density steels at larger scales and we propose some possible recommendations to try to improve them. The audience will be able to become aware of the problem and may be able to think of possible solutions to the problems faced
- As will be seen in the presentation, there is still a lot of work and research to be done in the field of low density steels, so this presentation may give ideas for further research development to other groups.