Details

Autor(en) / Beteiligte

• Pietrzyk, Maciej
• Kuziak, Roman
• Pidvysots’kyy, Valeriy
• Nowak, Jarosław
• Węglarczyk, Stanisław
• Drozdowski, Krzysztof

Titel

Computer-Aided Design of Manufacturing Chain Based on Closed Die Forging for Hardly Deformable Cu-Based Alloys

Ist Teil von

• Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2013-07, Vol.44 (7), p.3281-3302

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2013

Quelle

Springer Journals

Beschreibungen/Notizen

• Two copper-based alloys were considered, Cu-1 pct Cr and Cu-0.7 pct Cr-1 pct Si-2 pct Ni. The thermal, electrical, and mechanical properties of these alloys are given in the paper and compared to pure copper and steel. The role of aging and precipitation kinetics in hardening of the alloys is discussed based upon the developed model. Results of plastometric tests performed at various temperatures and various strain rates are presented. The effect of the initial microstructure on the flow stress was investigated. Rheologic models for the alloys were developed. A finite element (FE) model based on the Norton–Hoff visco-plastic flow rule was applied to the simulation of forging of the alloys. Analysis of the die wear for various processes of hot and cold forging is presented as well. A microstructure evolution model was implemented into the FE code, and the microstructure and mechanical properties of final products were predicted. Various variants of the manufacturing cycles were considered. These include different preheating schedules, hot forging, cold forging, and aging. All variants were simulated using the FE method and loads, die filling, tool wear, and mechanical properties of products were predicted. Three variants giving the best combination of forging parameters were selected and industrial trials were performed. The best manufacturing technology for the copper-based alloys is proposed.