A study of metal/die interfacial heat transfer behavior of vacuum die cast pure copper

• Published in: China foundry Vol. 17; no. 3; pp. 206 - 211
• Main Authors: Yang, Hong-mei, Pu, Zhou-meng, Guo, Zhi-peng, Zhang, Ang, Xiong, Shou-mei
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.05.2020; Foundry Journal Agency; Key Laboratory for Advanced Materials Processing Technology (Ministry of Education),Beijing 100084,China; Yunnan Copper Die-casting Technology Co.,Ltd.,Kunming 650001,China%Yunnan Copper Die-casting Technology Co.,Ltd.,Kunming 650001,China%School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China; School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China
• Subjects: Copper (Metal); Engineering; Induction motors; Machines; Manufacturing; Materials Engineering; Metallic Materials; Processes; Research & Development; vacuum die casting; interfacial heat transfer behavior; inverse method; copper; metal/die interface; China; 1; A; vacuum die casting; interfacial heat transfer behavior; inverse method; metal/die interface; copper; TG146.1
• ISSN: 1672-6421; 2365-9459; 1672-6421
• DOI: 10.1007/s41230-020-9157-8

High pressure die casting copper is used to produce rotors for induction motors to improve efficiency. Experiments were carried out for a special “step-shape” casting with different step thicknesses. Based on the measured temperature inside the die, the interfacial heat transfer coefficient (IHTC) at the metal/die interface during vacuum die casting was evaluated by solving the inverse problem. The IHTC peak value was 4.5×10 3 –11×10 3 W·m −2 ·K −1 under the basic operation condition. The influences of casting pressure, fast shot speed, pouring temperature and initial die surface temperature on the IHTC peak values were investigated. Results show that a greater casting pressure and faster shot speed could only increase the IHTC peak values at the location close to the ingate. An increase of pouring temperature and/or initial die surface temperature significantly increases the IHTC peak values.