Austempering technology is a driving force behind the strategic development in the iron foundry market.
ADI – Austempered Ductile Iron is a material that offers the combination of high fatigue resistance, wear resistance, toughness, lightness and extensive freedom in designing components together with good machining properties.
Through the iron casting process combined with the heat treatment, the mechanical properties achieved are the typical one of quenched&tempered steel. Austempered ductile iron (ADI) is an excellent opportunity to achieve ambitious goals to lighten and reduce the total production cost of the component.
According these properties, during EcoMetals tour we present two important case histories:
First case history: introducing ADI in automotive suspension system converting existing ductile iron solution in ADI casting solution
Customer designs and produces suspension modules and components for motor vehicles.
Objective of improvement: the aim of ADI introduction was to take advantage of its higher material properties towards lightweight, at reasonable industrial costs. -20% weight reduction.
Previous knuckle and previous control arm in ductile iron material (Rm=600 Mpa) had a consolidated foundry process. ADI900-8 casting solution, first of all, it didn’t generate relevant impact in casting process, just a little change on chemical composition then ADI permitted to obtain a relevant weigh saving.
So at the end of this project, the customer chose ADI and obtain the following advantages:
- Weight reduction (about 8,00kg less for vehicles)
- Reduction of fuel consumption
- Increase payload
- environmental regulations