Browsing by Keyword "High pressure die casting"
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Item Direct measurements and process monitoring for High Pressure Die Casting (HPDC) process(The WFO (The World Foundry Organization Ltd), 2016) Vicario, I.; Crespo, I.; Garcia, J. C.; Arratibel, E.; Aguillo, I.; Val, D.; Cao, D.; PROMETAL; CIRMETALProcess variables have a direct impact over High Pressure Die Casting (HPDC) quality parts. The measurement of metal temperature and the intensification pressure directly from the injected part, the vacuum pressure and flow and other parameters permits to determinate if the injected part is under the desired range on the controlled parameters. This work demonstrates how it's possible to have a better control of the HPDC process increasing final part quality by combining different sensors and actuators.Item ESR Processing of a New HighPressureDieCasting Steel(2021) Dubberstein, T.; Hengst, A.; Caballero, Patricia; Vicario, Iban; PROMETALSchmiedewerke Groditz (SWG) is among the global players of special re-melted steel alloys production. Within the RFCS project n⁰ 751360 HPDCSTEEL (High Pressure Die Casting Steel) a new ESR steel grade has been developed. At SWG the steel grade was produced using an open ESR unit. During re-melting the master alloy has been continuously added into the liquid slag bath and a modified ESR ingot of 20t has been manufactured. The ESR process was modified to increase the quality and performance of the steel, maintaining a constant distribution of synthetic carbides into the obtained ingot. A master alloy was placed on the bottom of the ESR machine before starting with the pre-charge. Furthermore, during re-melting the master alloy has been fed continuously using an installed balance system. No problems in the steel processing were detected, with a standard ESR melting and permanent feeding of the new alloy. The chemical composition of the alloy and of the liquid ESR slag was measured several times during the re-melting process, to determine if the master alloy was correctly dissolved in the melt.Item Study of an Al-Si-Cu HPDC alloy with high Zn content for the production of components requiring high ductility and tensile properties(2013) Vicario, Iban; Egizabal, Pedro; Galarraga, Haize; Plaza, Luis María; Crespo, Iñigo; PROMETAL; Tecnalia Research & Innovation; CIRMETALConventional high-pressure die casting aluminium components present certain limitations in terms of mechanical properties attainable due to the intrinsic porosity of the castings as well as the presence of iron-based brittle intermetallic phases. The present work approaches the increase in ductility and tensile strength through the analysis of the effect of the alloying elements of Al - Si alloys used for high-pressure die casting. The combination of alloying elements providing the best results in terms of ductility and tensile strength were eventually selected to produce a batch of components that were thoroughly tested. The final alloy had a composition of Si 8.21, Fe 0.78, Cu 1.53, Mn 0.64, Mg 0.46, Ni 0.07, Zn 3.37, Pb 0.34, Sn 0.27, Ti 0.18 and Cr 0.04 wt.%. The selected alloy performance was compared to that of the commercial Al - Si9Cu3 and Silafont® 36 alloys.