Aluminum High Vacuum Die-casting process has become more prevalent in automotive manufacturing industry which require high productive rate, weldable process and heat treatment process. However, high pressure die castings usually contain gas porosity due mainly to the entrapment of air or gas in the die during the high speed injection of the molten metal into the die cavity.
Vacuum block system with disk spring was developed and vacuum chanel was optimized with numerical flow analysis. The porosity of die castings was analyzed by X-ray CT, and the effect of porosity on the mechanical properties was analyzed by hardness and tensile test. Tensile strength was improved 49.5% for 50mbar high vacuum die-casting process compare then 300mbar. And then, Surface property was analyzed with plunger velocity and fast shot set point.

ABSTRACT
1. 서 론
2. 본 론
    2.1. 진공블럭 시스템 설계 및 진공 채널 설계
3. 결 과
    3.1. 진공블럭 시스템 설계 및 진공 채널 설계
    3.2. 진공도에 따른 인장강도, 연신율 비교
    3.3. 고진공 다이캐스팅 공정 연구
4. 결 론
References

• 유명한(Korea Institute of Carbon Convergence Technology) | Myeong-Han Yoo
• 문민석(Korea Institute of Carbon Convergence Technology) | Min-Seok Moon
• 오제하(Korea Institute of Carbon Convergence Technology) | Je-Ha Oh
• 송준혁(Korea Institute of Carbon Convergence Technology) | Joon-Hyuk Song Corresponding Author