Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Reheating Process of Metal Matrix Composite for Thixoforming

Thixoforming을 위한 금속복합재료의 재가열 공정

  • Published : 2000.08.01
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Abstract

The fabrication process of particulate metal matrix composites(PMMCs) with homogeneous distribution of reinforcement and reheating for thixoforming has been studied. Both of eletro-magnetic stirring and mechanical stirring were used to fabricate particulate metal matrix composites(PMMCs) for variation of particle size. The electrical and mechanical processing conditions for fabricating PMMCs are also suggested. For thixoforming of PMMCs, fabricated bi1lets are reheated by using the designed optimal coil with as function of length between PMMC billet and coil surface, and coil diameter and billet. The effect of reinforcement distribution according to variation of billet temperature were investigated with solid fraction theory with a function of matrix alloy and volume fraction of reinforcement.

본 논문은 강화입자가 균일하게 분산된 금속 복합재료의 제조와 반용융 성형을 위한 재가열에 관한 연구결과이다. 강화재 크기의 종류에 따른 금속복합재료를 제조하기 위하여 전자기식 교반과 기계식 교반을 동시에 이용한 복합 교반법을 사용하였다. 복합 교반법에 의하여 제조된 금속복합재료의 분산 상태를 조사하였다. 복합재료를 제조하기 위한 전자기식 교반법과 기계식 교반법을 겸용으로 한 공정이 소개되었다. 금속복합재료의 반용융성형을 위해서, 금속복합재료의 빌렛과 코일표면사이의 길이, 코일의 지름과 빌렛사이의 길이로 구성된 함수로 최적의 코일을 설계하여 빌렛을 재가열하였다. 복합재료의 반용융 성형시에 필요한 재가열 공정 인자인 가열시간과 온도변화의 관계를 조사하였다. 재가열중 강화재의 분산상태가 온도변화에 미치는 영향에 대하여 검토하였다.

Keywords

References

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